Part of the recent changes form 1o11, including DTMF input box error #19

FIX #8 : This should fix compiler errors
Revert do not update battery level when TX
2023-10-09 21:47:06 +02:00 · 2023-10-09 17:17:45 +02:00 · 2023-10-09 16:57:52 +02:00 · 2023-10-09 16:30:20 +02:00 · 2023-10-09 16:02:57 +02:00 · 2023-10-06 19:57:08 +02:00
68 changed files with 3424 additions and 2700 deletions
--- a/97
+++ b/97
@@ -3,6 +3,7 @@
 # 0 = disable
 # 1 = enable
 #
+ENABLE_CLANG                  := 0
 ENABLE_SWD                    := 0
 ENABLE_OVERLAY                := 0
 ENABLE_LTO                    := 1
@@ -11,8 +12,10 @@ ENABLE_AIRCOPY                := 0
 ENABLE_FMRADIO                := 1
 ENABLE_NOAA                   := 0
 ENABLE_VOICE                  := 0
-ENABLE_ALARM                  := 1
+ENABLE_VOX                    := 1
+ENABLE_ALARM                  := 0
 ENABLE_TX1750                 := 0
+ENABLE_PWRON_PASSWORD         := 0
 ENABLE_BIG_FREQ               := 1
 ENABLE_SMALL_BOLD             := 1
 ENABLE_KEEP_MEM_NAME          := 1
@@ -20,20 +23,18 @@ ENABLE_WIDE_RX                := 1
 ENABLE_TX_WHEN_AM             := 0
 ENABLE_F_CAL_MENU             := 0
 ENABLE_CTCSS_TAIL_PHASE_SHIFT := 1
-ENABLE_MAIN_KEY_HOLD          := 1
 ENABLE_BOOT_BEEPS             := 0
-ENABLE_COMPANDER              := 1
 ENABLE_SHOW_CHARGE_LEVEL      := 1
 ENABLE_REVERSE_BAT_SYMBOL     := 1
 ENABLE_CODE_SCAN_TIMEOUT      := 0
 ENABLE_AM_FIX                 := 1
 ENABLE_AM_FIX_SHOW_DATA       := 0
-ENABLE_SQUELCH_LOWER          := 0
+ENABLE_SQUELCH_MORE_SENSITIVE := 1
 ENABLE_FASTER_CHANNEL_SCAN    := 1
 ENABLE_RSSI_BAR               := 1
 ENABLE_AUDIO_BAR              := 1
+ENABLE_COPY_CHAN_TO_VFO       := 1
 ENABLE_SPECTRUM               := 1
-#ENABLE_COPY_CHAN_TO_VFO       := 1
 #ENABLE_SINGLE_VFO_CHAN        := 1
 #ENABLE_BAND_SCOPE             := 1

@@ -41,7 +42,12 @@ ENABLE_SPECTRUM               := 1

 TARGET = firmware

-ifeq ($(ENABLE_LTO), 1)
+ifeq ($(ENABLE_CLANG),1)
+	# GCC's linker, ld, doesn't understand LLVM's generated bytecode
+	ENABLE_LTO := 0
+endif
+
+ifeq ($(ENABLE_LTO),1)
 	# can't have LTO and OVERLAY enabled at same time
 	ENABLE_OVERLAY := 0
 endif
@@ -132,7 +138,9 @@ ifeq ($(ENABLE_FMRADIO),1)
 endif
 OBJS += ui/helper.o
 OBJS += ui/inputbox.o
-OBJS += ui/lock.o
+ifeq ($(ENABLE_PWRON_PASSWORD),1)
+	OBJS += ui/lock.o
+endif
 OBJS += ui/main.o
 OBJS += ui/menu.o
 OBJS += ui/scanner.o
@@ -149,8 +157,21 @@ else
 endif

 AS = arm-none-eabi-gcc
-CC = arm-none-eabi-gcc
+
+CC =
 LD = arm-none-eabi-gcc
+
+ifeq ($(ENABLE_CLANG),0)
+	CC += arm-none-eabi-gcc
+# Use GCC's linker to avoid undefined symbol errors
+#	LD += arm-none-eabi-gcc
+else
+#	May need to adjust this to match your system
+	CC += clang --sysroot=/usr/arm-none-eabi --target=arm-none-eabi
+#	Bloats binaries to 512MB
+#	LD = ld.lld
+endif
+
 OBJCOPY = arm-none-eabi-objcopy
 SIZE = arm-none-eabi-size

@@ -166,16 +187,30 @@ ifeq ($(ENABLE_OVERLAY),1)
 	ASFLAGS += -DENABLE_OVERLAY
 endif

-CFLAGS = -Os -Wall -Werror -mcpu=cortex-m0 -fno-builtin -fshort-enums -fno-delete-null-pointer-checks -std=c11 -MMD
-#CFLAGS = -Os -Wall -Werror -mcpu=cortex-m0 -fno-builtin -fshort-enums -fno-delete-null-pointer-checks -std=c99 -MMD
-#CFLAGS = -Os -Wall -Werror -mcpu=cortex-m0 -fno-builtin -fshort-enums -fno-delete-null-pointer-checks -std=gnu99 -MMD
-#CFLAGS = -Os -Wall -Werror -mcpu=cortex-m0 -fno-builtin -fshort-enums -fno-delete-null-pointer-checks -std=gnu11 -MMD
-
-ifeq ($(ENABLE_LTO), 1)
-#	CFLAGS += -flto
-	CFLAGS += -flto=2
+CFLAGS =
+ifeq ($(ENABLE_CLANG),0)
+	CFLAGS += -Os -Wall -Werror -mcpu=cortex-m0 -fno-builtin -fshort-enums -fno-delete-null-pointer-checks -std=c11 -MMD
+	#CFLAGS += -Os -Wall -Werror -mcpu=cortex-m0 -fno-builtin -fshort-enums -fno-delete-null-pointer-checks -std=c99 -MMD
+	#CFLAGS += -Os -Wall -Werror -mcpu=cortex-m0 -fno-builtin -fshort-enums -fno-delete-null-pointer-checks -std=gnu99 -MMD
+	#CFLAGS += -Os -Wall -Werror -mcpu=cortex-m0 -fno-builtin -fshort-enums -fno-delete-null-pointer-checks -std=gnu11 -MMD
+else
+	# Oz needed to make it fit on flash
+	CFLAGS += -Oz -Wall -Werror -mcpu=cortex-m0 -fno-builtin -fshort-enums -fno-delete-null-pointer-checks -std=c11 -MMD
 endif

+ifeq ($(ENABLE_LTO),1)
+	CFLAGS += -flto=2
+else
+	# We get most of the space savings if LTO creates problems
+	CFLAGS += -ffunction-sections -fdata-sections
+endif
+
+# May cause unhelpful build failures
+#CFLAGS += -Wpadded
+
+# catch any and all warnings
+#CFLAGS += -Wextra
+
 CFLAGS += -DPRINTF_INCLUDE_CONFIG_H
 CFLAGS += -DGIT_HASH=\"$(GIT_HASH)\"

@@ -209,12 +244,18 @@ endif
 ifeq ($(ENABLE_VOICE),1)
 	CFLAGS  += -DENABLE_VOICE
 endif
+ifeq ($(ENABLE_VOX),1)
+	CFLAGS  += -DENABLE_VOX
+endif
 ifeq ($(ENABLE_ALARM),1)
 	CFLAGS  += -DENABLE_ALARM
 endif
 ifeq ($(ENABLE_TX1750),1)
 	CFLAGS  += -DENABLE_TX1750
 endif
+ifeq ($(ENABLE_PWRON_PASSWORD),1)
+	CFLAGS  += -DENABLE_PWRON_PASSWORD
+endif
 ifeq ($(ENABLE_KEEP_MEM_NAME),1)
 	CFLAGS  += -DENABLE_KEEP_MEM_NAME
 endif
@@ -230,15 +271,9 @@ endif
 ifeq ($(ENABLE_CTCSS_TAIL_PHASE_SHIFT),1)
 	CFLAGS  += -DENABLE_CTCSS_TAIL_PHASE_SHIFT
 endif
-ifeq ($(ENABLE_MAIN_KEY_HOLD),1)
-	CFLAGS  += -DENABLE_MAIN_KEY_HOLD
-endif
 ifeq ($(ENABLE_BOOT_BEEPS),1)
 	CFLAGS  += -DENABLE_BOOT_BEEPS
 endif
-ifeq ($(ENABLE_COMPANDER),1)
-	CFLAGS  += -DENABLE_COMPANDER
-endif
 ifeq ($(ENABLE_SHOW_CHARGE_LEVEL),1)
 	CFLAGS  += -DENABLE_SHOW_CHARGE_LEVEL
 endif
@@ -282,11 +317,25 @@ ifeq ($(ENABLE_BAND_SCOPE),1)
 	CFLAGS += -DENABLE_BAND_SCOPE
 endif

-LDFLAGS = -mcpu=cortex-m0 -nostartfiles -Wl,-T,firmware.ld
+LDFLAGS =
+ifeq ($(ENABLE_CLANG),0)
+	LDFLAGS += -mcpu=cortex-m0 -nostartfiles -Wl,-T,firmware.ld
+else
+#	Fix warning about implied executable stack
+	LDFLAGS += -z noexecstack -mcpu=cortex-m0 -nostartfiles -Wl,-T,firmware.ld
+endif
+
+# Use newlib-nano instead of newlib
+LDFLAGS += --specs=nano.specs
+
+ifeq ($(ENABLE_LTO),0)
+	# Throw away unneeded func/data sections like LTO does
+	LDFLAGS += -Wl,--gc-sections
+endif

 ifeq ($(DEBUG),1)
 	ASFLAGS += -g
-	CFLAGS += -g
+	CFLAGS  += -g
 	LDFLAGS += -g
 endif

--- a/README.md
+++ b/README.md
@@ -33,33 +33,40 @@ Anyway, have fun.

 # Radio performance

-Please note that the Quansheng uv-k radios are not professional quality transceivers, their
-performance is strictly limited, somewhat below that of a decent transceiver. The RX front
-end has no track-tuned band pass filtering at all, and so are wide band/wide open to any
-and all signals over a wide frequency range.
-Using the radio in high intensity RF environments will nearly always destroy your reception,
-the receiver simply doesn't have a great dynamic range, which means distorted AM audio with
-strong received signals, there is nothing more anyone can do in firmware/software to stop that
-happening once the RX gain adjustment I do (AM fix) reaches the hardwares limit.
+Please note that the Quansheng UV-Kx radios are not professional quality transceivers, their
+performance is strictly limited. The RX front end has no track-tuned band pass filtering
+at all, and so are wide band/wide open to any and all signals over a large frequency range.

-Saying that, they are nice toys for the price, fun to play with.
+Using the radio in high intensity RF environments will most likely make reception anything but
+easy (AM mode will suffer far more than FM ever will), the receiver simply doesn't have a
+great dynamic range, which results in distorted AM audio with stronger RX'ed signals.
+There is nothing more anyone can do in firmware/software to improve that, once the RX gain
+adjustment I do (AM fix) reaches the hardwares limit, your AM RX audio will be all but
+non-existant (just like Quansheng's firmware).
+On the other hand, FM RX audio will/should be fine.
+
+But, they are nice toys for the price, fun to play with.

 # User customization

-You can customize the firmware by enabling/disabling various compile options.
+You can customize the firmware by enabling/disabling various compile options, this allows
+us to remove certain firmware features in order to make room in the flash for others.
 You'll find the options at the top of "Makefile" ('0' = disable, '1' = enable) ..

 ```
+ENABLE_CLANG                  := 0     **experimental, builds with clang instead of gcc (LTO will be disabled if you enable this)
 ENABLE_SWD                    := 0       only needed if using CPU's SWD port (debugging/programming)
 ENABLE_OVERLAY                := 0       cpu FLASH stuff, not needed
-ENABLE_LTO                    := 0     **experimental, reduces size of compiled firmware but might break EEPROM reads (overlay will be disabled if you enable this)
+ENABLE_LTO                    := 0     **experimental, reduces size of compiled firmware but might break EEPROM reads (OVERLAY will be disabled if you enable this)
 ENABLE_UART                   := 1       without this you can't configure radio via PC !
 ENABLE_AIRCOPY                := 0       easier to just enter frequency with butts
-ENABLE_FMRADIO                := 1       WBFM VHF broadcast band receiver
+ENABLE_FMRADIO                := 0       WBFM VHF broadcast band receiver
 ENABLE_NOAA                   := 0       everything NOAA (only of any use in the USA)
 ENABLE_VOICE                  := 0       want to hear voices ?
+ENABLE_VOX                    := 0
 ENABLE_ALARM                  := 0       TX alarms
 ENABLE_1750HZ                 := 0       side key 1750Hz TX tone (older style repeater access)
+ENABLE_PWRON_PASSWORD         := 1       power-on password stuff
 ENABLE_BIG_FREQ               := 0       big font frequencies (like original QS firmware)
 ENABLE_SMALL_BOLD             := 1       bold channel name/no. (when name + freq channel display mode)
 ENABLE_KEEP_MEM_NAME          := 1       maintain channel name when (re)saving memory channel
@@ -67,23 +74,31 @@ ENABLE_WIDE_RX                := 1       full 18MHz to 1300MHz RX (though front-
 ENABLE_TX_WHEN_AM             := 0       allow TX (always FM) when RX is set to AM
 ENABLE_F_CAL_MENU             := 0       enable/disable the radios hidden frequency calibration menu
 ENABLE_CTCSS_TAIL_PHASE_SHIFT := 1       standard CTCSS tail phase shift rather than QS's own 55Hz tone method
-ENABLE_MAIN_KEY_HOLD          := 1       initial F-key press not needed, instead just hold down keys 0-9 to access the secondary butt functions
 ENABLE_BOOT_BEEPS             := 0       gives user audio feedback on volume knob position at boot-up
-ENABLE_COMPANDER              := 0       this is broken, don't bother with it for now .. compander option (per channel)
 ENABLE_SHOW_CHARGE_LEVEL      := 0       show the charge level when the radio is on charge
 ENABLE_REVERSE_BAT_SYMBOL     := 1       mirror the battery symbol on the status bar (+ pole on the right)
 ENABLE_CODE_SCAN_TIMEOUT      := 0       enable/disable 32-sec CTCSS/DCS scan timeout (press exit butt instead of time-out to end scan)
 ENABLE_AM_FIX                 := 1       dynamically adjust the front end gains when in AM mode to helo prevent AM demodulator saturation, ignore the on-screen RSSI level (for now)
 ENABLE_AM_FIX_SHOW_DATA       := 1       show debug data for the AM fix (still tweaking it)
-ENABLE_SQUELCH_MORE_SENSITIVE := 1       make squelch levels a little bit more sensitive - I plan to let user adjust the values themselves
+ENABLE_SQUELCH_MORE_SENSITIVE := 0       make squelch levels a little bit more sensitive - I plan to let user adjust the values themselves
 ENABLE_FASTER_CHANNEL_SCAN    := 0       increases the channel scan speed, but the squelch is also made more twitchy
 ENABLE_RSSI_BAR               := 1       enable a dBm/Sn RSSI bar graph level inplace of the little antenna symbols
 ENABLE_AUDIO_BAR              := 0       experimental, display an audo bar level when TX'ing
-#ENABLE_COPY_CHAN_TO_VFO      := 1       not yet implemented - copy the current channel into the VFO
+ENABLE_COPY_CHAN_TO_VFO       := 1       copy current channel into the other VFO. Long press Menu key ('M')
 #ENABLE_SINGLE_VFO_CHAN       := 1       not yet implemented - single VFO on display when possible
 #ENABLE_BAND_SCOPE            := 1       not yet implemented - spectrum/pan-adapter
 ```

+# New/modified function keys
+
+* Long-press 'M' .. Copy selected channel into same VFO, then switch VFO to frequency mode
+*
+* Long-press '7' .. Toggle selected channel scanlist setting .. if VOX  is disabled in Makefile
+* or
+* Long-press '5' .. Toggle selected channel scanlist setting .. if NOAA is disabled in Makefile
+*
+* Long-press '*' .. Start scanning, then toggles the scanning between scanlists 1, 2 or ALL channels
+
 # Some changes made from the Quansheng firmware

 * Various Quansheng firmware bugs fixed
@@ -103,28 +118,38 @@ arm-none-eabi GCC version 10.3.1 is recommended, which is the current version on
 Other versions may generate a flash file that is too big.
 You can get an appropriate version from: https://developer.arm.com/downloads/-/gnu-rm

+clang may be used but isn't fully supported. Resulting binaries may also be bigger.
+You can get it from: https://releases.llvm.org/download.html
+
 # Building

-To build the firmware, you need to fetch the submodules and then run make:
-```
-git submodule update --init --recursive --depth=1
-make
-```
+If you have docker installed you can use `compile-with-docker.bat`, the output files are created in `compiled-firmware` folder. This method gives significantly smaller binaries, I've seen differences up to 1kb, so it can fit more functionalities this way. The challange can be (or not) installing the docker itself.

-To compile directly in windows without the need of a linux virtual machine:

-```
-1. Download and install "gcc-arm-none-eabi-10.3-2021.10-win32.exe" from https://developer.arm.com/downloads/-/gnu-rm
-2. Download and install "gnu_make-3.81.exe" from https://gnuwin32.sourceforge.net/packages/make.htm
+To compile directly in windows:

-3. You may (or not) need to manualy add gcc path to you OS environment PATH.
-   ie add C:\Program Files (x86)\GNU Arm Embedded Toolchain\10 2021.10\bin
-
-4. You may (or not) need to reboot your PC after installing the above
-```
-
-Then you can run 'win_make.bat' from the directory you saved this source code too.
-You may need to edit the bat file (path to make.exe) depending on where you installed the above two packages too.
+1. Open windows command line and run:
+    ```
+    winget install -e -h git.git Python.Python.3.8 GnuWin32.Make
+    winget install -e -h Arm.GnuArmEmbeddedToolchain -v "10 2021.10"
+    ```
+2. Close command line, open a new one and run:
+    ```
+    pip install --user --upgrade pip
+    pip install crcmod
+    mkdir c:\projects & cd /D c:/projects
+    git clone https://github.com/egzumer/uv-k5-firmware-custom.git
+    ```
+3. From now on you can build the firmware by going to `c:\projects\uv-k5-firmware-custom` and running `win_make.bat` or by running a command line:
+    ```
+    cd /D c:\projects\uv-k5-firmware-custom
+    win_make.bat
+    ```
+4. To reset the repository and pull new changes run (!!! it will delete all your changes !!!):
+    ```
+    cd /D c:\projects\uv-k5-firmware-custom
+    git reset --hard & git clean -fd & git pull
+    ```

 I've left some notes in the win_make.bat file to maybe help with stuff.

@@ -132,6 +157,7 @@ I've left some notes in the win_make.bat file to maybe help with stuff.

 Many thanks to various people on Telegram for putting up with me during this effort and helping:

+* [OneOfEleven](https://github.com/OneOfEleven)
 * [DualTachyon](https://github.com/DualTachyon)
 * [Mikhail](https://github.com/fagci)
 * [Andrej](https://github.com/Tunas1337)
@@ -165,13 +191,13 @@ You may obtain a copy of the License at
 # Example changes/updates

 <p float="left">
-  <img src="/image1.png" width=300 />
-  <img src="/image2.png" width=300 />
-  <img src="/image3.png" width=300 />
+  <img src="/images/image1.png" width=300 />
+  <img src="/images/image2.png" width=300 />
+  <img src="/images/image3.png" width=300 />
 </p>

 Video showing the AM fix working ..

-<video src="/AM_fix.mp4"></video>
+<video src="/images/AM_fix.mp4"></video>

 <video src="https://github.com/OneOfEleven/uv-k5-firmware-custom/assets/51590168/2a3a9cdc-97da-4966-bf0d-1ce6ad09779c"></video>
--- a/am_fix.c
+++ b/am_fix.c
@@ -34,20 +34,9 @@

 	typedef struct
 	{
-		#if 1
-			// bitfields take up less flash bytes
-			uint8_t lna_short:2;   // 0 ~ 3
-			uint8_t       lna:3;   // 0 ~ 7
-			uint8_t     mixer:2;   // 0 ~ 3
-			uint8_t       pga:3;   // 0 ~ 7
-		#else
-			uint8_t lna_short;     // 0 ~ 3
-			uint8_t       lna;     // 0 ~ 7
-			uint8_t     mixer;     // 0 ~ 3
-			uint8_t       pga;     // 0 ~ 7
-		#endif
-	} t_gain_table;
-	//} __attribute__((packed)) t_gain_table;
+		uint16_t reg_val;
+		int8_t   gain_dB;
+	} __attribute__((packed)) t_gain_table;

 	// REG_10 AGC gain table
 	//
@@ -97,141 +86,140 @@
 	//           if I don't add the brackets, reading the table returns unexpected/different values !!!
 	//
 	//
-//	static const int16_t lna_short_dB[] = {  -19,   -16,   -11,     0};   // was (but wrong)
-	static const int16_t lna_short_dB[] = { (-33), (-30), (-24),    0};   // corrected'ish
-	static const int16_t lna_dB[]       = { (-24), (-19), (-14), ( -9), (-6), (-4), (-2), 0};
-	static const int16_t mixer_dB[]     = { ( -8), ( -6), ( -3),    0};
-	static const int16_t pga_dB[]       = { (-33), (-27), (-21), (-15), (-9), (-6), (-3), 0};
+////	static const int16_t lna_short_dB[] = {  -19,   -16,   -11,     0};   // was (but wrong)
+//	static const int16_t lna_short_dB[] = { (-33), (-30), (-24),    0};   // corrected'ish
+//	static const int16_t lna_dB[]       = { (-24), (-19), (-14), ( -9), (-6), (-4), (-2), 0};
+//	static const int16_t mixer_dB[]     = { ( -8), ( -6), ( -3),    0};
+//	static const int16_t pga_dB[]       = { (-33), (-27), (-21), (-15), (-9), (-6), (-3), 0};

 	// lookup table is hugely easier than writing code to do the same
 	//
 	static const t_gain_table gain_table[] =
 	{
-		{.lna_short = 3, .lna = 2, .mixer = 3, .pga = 6},  //  0 0dB -14dB  0dB  -3dB .. -17dB original
+		{0x035E, -17},         //   0 .. 3 2 3 6 ..   0dB -14dB  0dB  -3dB .. -17dB original

 #ifdef ENABLE_AM_FIX_TEST1

 		// test table that lets me manually set the lna-short register
 		// to measure it's actual dB change using an RF signal generator

-		{0, 2, 3, 6},         // 1 .. -33dB  -14dB   0dB  -3dB .. -50dB
-		{1, 2, 3, 6},         // 2 .. -30dB  -14dB   0dB  -3dB .. -47dB
-		{2, 2, 3, 6},         // 3 .. -24dB  -14dB   0dB  -3dB .. -41dB
-		{3, 2, 3, 6}          // 4 ..   0dB  -14dB   0dB  -3dB .. -17dB
+		{0x005E, -50},         //   1 .. 0 2 3 6 .. -33dB -14dB  0dB  -3dB .. -50dB
+		{0x015E, -47},         //   2 .. 1 2 3 6 .. -30dB -14dB  0dB  -3dB .. -47dB
+		{0x025E, -41},         //   3 .. 2 2 3 6 .. -24dB -14dB  0dB  -3dB .. -41dB
+		{0x035E, -17}          //   4 .. 3 2 3 6 ..   0dB -14dB  0dB  -3dB .. -17dB original
 	};

-	const unsigned int original_index = 1;
+	static const unsigned int original_index = 1;

 #else

-		{0, 0, 0, 0},         //   1 .. -33dB -24dB -8dB -33dB .. -98dB
-		{0, 0, 1, 0},         //   2 .. -33dB -24dB -6dB -33dB .. -96dB
-		{1, 0, 0, 0},         //   3 .. -30dB -24dB -8dB -33dB .. -95dB
-		{0, 1, 0, 0},         //   4 .. -33dB -19dB -8dB -33dB .. -93dB
-		{0, 0, 0, 1},         //   5 .. -33dB -24dB -8dB -27dB .. -92dB
-		{0, 1, 1, 0},         //   6 .. -33dB -19dB -6dB -33dB .. -91dB
-		{0, 0, 1, 1},         //   7 .. -33dB -24dB -6dB -27dB .. -90dB
-		{1, 0, 0, 1},         //   8 .. -30dB -24dB -8dB -27dB .. -89dB
-		{0, 1, 2, 0},         //   9 .. -33dB -19dB -3dB -33dB .. -88dB
-		{1, 0, 3, 0},         //  10 .. -30dB -24dB  0dB -33dB .. -87dB
-		{0, 0, 0, 2},         //  11 .. -33dB -24dB -8dB -21dB .. -86dB
-		{1, 1, 2, 0},         //  12 .. -30dB -19dB -3dB -33dB .. -85dB
-		{0, 0, 3, 1},         //  13 .. -33dB -24dB  0dB -27dB .. -84dB
-		{0, 3, 0, 0},         //  14 .. -33dB  -9dB -8dB -33dB .. -83dB
-		{1, 1, 3, 0},         //  15 .. -30dB -19dB  0dB -33dB .. -82dB
-		{1, 0, 3, 1},         //  16 .. -30dB -24dB  0dB -27dB .. -81dB
-		{0, 2, 3, 0},         //  17 .. -33dB -14dB  0dB -33dB .. -80dB
-		{1, 2, 0, 1},         //  18 .. -30dB -14dB -8dB -27dB .. -79dB
-		{0, 3, 2, 0},         //  19 .. -33dB  -9dB -3dB -33dB .. -78dB
-		{1, 4, 0, 0},         //  20 .. -30dB  -6dB -8dB -33dB .. -77dB
-		{1, 1, 3, 1},         //  21 .. -30dB -19dB  0dB -27dB .. -76dB
-		{0, 0, 2, 3},         //  22 .. -33dB -24dB -3dB -15dB .. -75dB
-		{1, 3, 0, 1},         //  23 .. -30dB  -9dB -8dB -27dB .. -74dB
-		{1, 6, 0, 0},         //  24 .. -30dB  -2dB -8dB -33dB .. -73dB
-		{0, 7, 1, 0},         //  25 .. -33dB   0dB -6dB -33dB .. -72dB
-		{0, 6, 2, 0},         //  26 .. -33dB  -2dB -3dB -33dB .. -71dB
-		{2, 1, 3, 1},         //  27 .. -24dB -19dB  0dB -27dB .. -70dB
-		{0, 3, 1, 2},         //  28 .. -33dB  -9dB -6dB -21dB .. -69dB
-		{0, 0, 0, 6},         //  29 .. -33dB -24dB -8dB  -3dB .. -68dB
-		{0, 5, 2, 1},         //  30 .. -33dB  -4dB -3dB -27dB .. -67dB
-		{0, 0, 1, 6},         //  31 .. -33dB -24dB -6dB  -3dB .. -66dB
-		{1, 2, 3, 2},         //  32 .. -30dB -14dB  0dB -21dB .. -65dB
-		{2, 1, 1, 3},         //  33 .. -24dB -19dB -6dB -15dB .. -64dB
-		{1, 7, 3, 0},         //  34 .. -30dB   0dB  0dB -33dB .. -63dB
-		{1, 3, 0, 3},         //  35 .. -30dB  -9dB -8dB -15dB .. -62dB
-		{0, 1, 2, 5},         //  36 .. -33dB -19dB -3dB  -6dB .. -61dB
-		{2, 0, 2, 4},         //  37 .. -24dB -24dB -3dB  -9dB .. -60dB
-		{1, 6, 3, 1},         //  38 .. -30dB  -2dB  0dB -27dB .. -59dB
-		{1, 2, 0, 5},         //  39 .. -30dB -14dB -8dB  -6dB .. -58dB
-		{2, 5, 0, 2},         //  40 .. -24dB  -4dB -8dB -21dB .. -57dB
-		{2, 6, 2, 1},         //  41 .. -24dB  -2dB -3dB -27dB .. -56dB
-		{0, 5, 2, 3},         //  42 .. -33dB  -4dB -3dB -15dB .. -55dB
-		{2, 0, 2, 6},         //  43 .. -24dB -24dB -3dB  -3dB .. -54dB
-		{0, 3, 0, 6},         //  44 .. -33dB  -9dB -8dB  -3dB .. -53dB
-		{0, 6, 0, 4},         //  45 .. -33dB  -2dB -8dB  -9dB .. -52dB
-		{0, 3, 1, 6},         //  46 .. -33dB  -9dB -6dB  -3dB .. -51dB
-		{1, 2, 3, 5},         //  47 .. -30dB -14dB  0dB  -6dB .. -50dB
-		{0, 5, 1, 5},         //  48 .. -33dB  -4dB -6dB  -6dB .. -49dB
-		{0, 3, 3, 5},         //  49 .. -33dB  -9dB  0dB  -6dB .. -48dB
-		{0, 6, 2, 4},         //  50 .. -33dB  -2dB -3dB  -9dB .. -47dB
-		{1, 5, 2, 4},         //  51 .. -30dB  -4dB -3dB  -9dB .. -46dB
-		{3, 0, 1, 3},         //  52 ..   0dB -24dB -6dB -15dB .. -45dB
-		{0, 6, 1, 6},         //  53 .. -33dB  -2dB -6dB  -3dB .. -44dB
-		{1, 5, 2, 5},         //  54 .. -30dB  -4dB -3dB  -6dB .. -43dB
-		{0, 4, 2, 7},         //  55 .. -33dB  -6dB -3dB   0dB .. -42dB
-		{2, 2, 2, 7},         //  56 .. -24dB -14dB -3dB   0dB .. -41dB
-		{2, 5, 2, 4},         //  57 .. -24dB  -4dB -3dB  -9dB .. -40dB
-		{2, 3, 3, 5},         //  58 .. -24dB  -9dB  0dB  -6dB .. -39dB
-		{1, 6, 3, 5},         //  59 .. -30dB  -2dB  0dB  -6dB .. -38dB
-		{2, 5, 1, 6},         //  60 .. -24dB  -4dB -6dB  -3dB .. -37dB
-		{3, 3, 3, 1},         //  61 ..   0dB  -9dB  0dB -27dB .. -36dB
-		{3, 2, 3, 2},         //  62 ..   0dB -14dB  0dB -21dB .. -35dB
-		{2, 5, 2, 6},         //  63 .. -24dB  -4dB -3dB  -3dB .. -34dB
-		{3, 0, 1, 6},         //  64 ..   0dB -24dB -6dB  -3dB .. -33dB
-		{3, 0, 0, 7},         //  65 ..   0dB -24dB -8dB   0dB .. -32dB
-		{2, 5, 3, 6},         //  66 .. -24dB  -4dB  0dB  -3dB .. -31dB
-		{3, 3, 3, 2},         //  67 ..   0dB  -9dB  0dB -21dB .. -30dB
-		{2, 6, 3, 6},         //  68 .. -24dB  -2dB  0dB  -3dB .. -29dB
-		{3, 2, 0, 5},         //  69 ..   0dB -14dB -8dB  -6dB .. -28dB
-		{3, 5, 0, 3},         //  70 ..   0dB  -4dB -8dB -15dB .. -27dB
-		{3, 3, 0, 4},         //  71 ..   0dB  -9dB -8dB  -9dB .. -26dB
-		{3, 1, 1, 7},         //  72 ..   0dB -19dB -6dB   0dB .. -25dB
-		{3, 4, 2, 3},         //  73 ..   0dB  -6dB -3dB -15dB .. -24dB
-		{3, 4, 0, 4},         //  74 ..   0dB  -6dB -8dB  -9dB .. -23dB
-		{3, 2, 0, 7},         //  75 ..   0dB -14dB -8dB   0dB .. -22dB
-		{3, 7, 1, 3},         //  76 ..   0dB   0dB -6dB -15dB .. -21dB
-		{3, 6, 2, 3},         //  77 ..   0dB  -2dB -3dB -15dB .. -20dB
-		{3, 5, 3, 3},         //  78 ..   0dB  -4dB  0dB -15dB .. -19dB
-		{3, 3, 3, 4},         //  79 ..   0dB  -9dB  0dB  -9dB .. -18dB
-		{3, 2, 3, 6},         //  80 ..   0dB -14dB  0dB  -3dB .. -17dB original
-		{3, 6, 0, 5},         //  81 ..   0dB  -2dB -8dB  -6dB .. -16dB
-		{3, 7, 1, 4},         //  82 ..   0dB   0dB -6dB  -9dB .. -15dB
-		{3, 2, 3, 7},         //  83 ..   0dB -14dB  0dB   0dB .. -14dB
-		{3, 6, 0, 6},         //  84 ..   0dB  -2dB -8dB  -3dB .. -13dB
-		{3, 3, 2, 7},         //  85 ..   0dB  -9dB -3dB   0dB .. -12dB
-		{3, 7, 0, 6},         //  86 ..   0dB   0dB -8dB  -3dB .. -11dB
-		{3, 5, 3, 5},         //  87 ..   0dB  -4dB  0dB  -6dB .. -10dB
-		{3, 7, 2, 5},         //  88 ..   0dB   0dB -3dB  -6dB ..  -9dB
-		{3, 6, 3, 5},         //  89 ..   0dB  -2dB  0dB  -6dB ..  -8dB
-		{3, 5, 2, 7},         //  90 ..   0dB  -4dB -3dB   0dB ..  -7dB
-		{3, 7, 2, 6},         //  91 ..   0dB   0dB -3dB  -3dB ..  -6dB
-		{3, 6, 2, 7},         //  92 ..   0dB  -2dB -3dB   0dB ..  -5dB
-		{3, 5, 3, 7},         //  93 ..   0dB  -4dB  0dB   0dB ..  -4dB
-		{3, 7, 2, 7},         //  94 ..   0dB   0dB -3dB   0dB ..  -3dB
-		{3, 6, 3, 7},         //  95 ..   0dB  -2dB  0dB   0dB ..  -2dB
-		{3, 7, 3, 7}          //  96 ..   0dB   0dB  0dB   0dB ..   0dB
+		{0x0000, -98},         //   1 .. 0 0 0 0 .. -33dB -24dB -8dB -33dB .. -98dB
+		{0x0008, -96},         //   2 .. 0 0 1 0 .. -33dB -24dB -6dB -33dB .. -96dB
+		{0x0100, -95},         //   3 .. 1 0 0 0 .. -30dB -24dB -8dB -33dB .. -95dB
+		{0x0020, -93},         //   4 .. 0 1 0 0 .. -33dB -19dB -8dB -33dB .. -93dB
+		{0x0001, -92},         //   5 .. 0 0 0 1 .. -33dB -24dB -8dB -27dB .. -92dB
+		{0x0028, -91},         //   6 .. 0 1 1 0 .. -33dB -19dB -6dB -33dB .. -91dB
+		{0x0009, -90},         //   7 .. 0 0 1 1 .. -33dB -24dB -6dB -27dB .. -90dB
+		{0x0101, -89},         //   8 .. 1 0 0 1 .. -30dB -24dB -8dB -27dB .. -89dB
+		{0x0030, -88},         //   9 .. 0 1 2 0 .. -33dB -19dB -3dB -33dB .. -88dB
+		{0x0118, -87},         //  10 .. 1 0 3 0 .. -30dB -24dB  0dB -33dB .. -87dB
+		{0x0002, -86},         //  11 .. 0 0 0 2 .. -33dB -24dB -8dB -21dB .. -86dB
+		{0x0130, -85},         //  12 .. 1 1 2 0 .. -30dB -19dB -3dB -33dB .. -85dB
+		{0x0019, -84},         //  13 .. 0 0 3 1 .. -33dB -24dB  0dB -27dB .. -84dB
+		{0x0060, -83},         //  14 .. 0 3 0 0 .. -33dB  -9dB -8dB -33dB .. -83dB
+		{0x0138, -82},         //  15 .. 1 1 3 0 .. -30dB -19dB  0dB -33dB .. -82dB
+		{0x0119, -81},         //  16 .. 1 0 3 1 .. -30dB -24dB  0dB -27dB .. -81dB
+		{0x0058, -80},         //  17 .. 0 2 3 0 .. -33dB -14dB  0dB -33dB .. -80dB
+		{0x0141, -79},         //  18 .. 1 2 0 1 .. -30dB -14dB -8dB -27dB .. -79dB
+		{0x0070, -78},         //  19 .. 0 3 2 0 .. -33dB  -9dB -3dB -33dB .. -78dB
+		{0x0180, -77},         //  20 .. 1 4 0 0 .. -30dB  -6dB -8dB -33dB .. -77dB
+		{0x0139, -76},         //  21 .. 1 1 3 1 .. -30dB -19dB  0dB -27dB .. -76dB
+		{0x0013, -75},         //  22 .. 0 0 2 3 .. -33dB -24dB -3dB -15dB .. -75dB
+		{0x0161, -74},         //  23 .. 1 3 0 1 .. -30dB  -9dB -8dB -27dB .. -74dB
+		{0x01C0, -73},         //  24 .. 1 6 0 0 .. -30dB  -2dB -8dB -33dB .. -73dB
+		{0x00E8, -72},         //  25 .. 0 7 1 0 .. -33dB   0dB -6dB -33dB .. -72dB
+		{0x00D0, -71},         //  26 .. 0 6 2 0 .. -33dB  -2dB -3dB -33dB .. -71dB
+		{0x0239, -70},         //  27 .. 2 1 3 1 .. -24dB -19dB  0dB -27dB .. -70dB
+		{0x006A, -69},         //  28 .. 0 3 1 2 .. -33dB  -9dB -6dB -21dB .. -69dB
+		{0x0006, -68},         //  29 .. 0 0 0 6 .. -33dB -24dB -8dB  -3dB .. -68dB
+		{0x00B1, -67},         //  30 .. 0 5 2 1 .. -33dB  -4dB -3dB -27dB .. -67dB
+		{0x000E, -66},         //  31 .. 0 0 1 6 .. -33dB -24dB -6dB  -3dB .. -66dB
+		{0x015A, -65},         //  32 .. 1 2 3 2 .. -30dB -14dB  0dB -21dB .. -65dB
+		{0x022B, -64},         //  33 .. 2 1 1 3 .. -24dB -19dB -6dB -15dB .. -64dB
+		{0x01F8, -63},         //  34 .. 1 7 3 0 .. -30dB   0dB  0dB -33dB .. -63dB
+		{0x0163, -62},         //  35 .. 1 3 0 3 .. -30dB  -9dB -8dB -15dB .. -62dB
+		{0x0035, -61},         //  36 .. 0 1 2 5 .. -33dB -19dB -3dB  -6dB .. -61dB
+		{0x0214, -60},         //  37 .. 2 0 2 4 .. -24dB -24dB -3dB  -9dB .. -60dB
+		{0x01D9, -59},         //  38 .. 1 6 3 1 .. -30dB  -2dB  0dB -27dB .. -59dB
+		{0x0145, -58},         //  39 .. 1 2 0 5 .. -30dB -14dB -8dB  -6dB .. -58dB
+		{0x02A2, -57},         //  40 .. 2 5 0 2 .. -24dB  -4dB -8dB -21dB .. -57dB
+		{0x02D1, -56},         //  41 .. 2 6 2 1 .. -24dB  -2dB -3dB -27dB .. -56dB
+		{0x00B3, -55},         //  42 .. 0 5 2 3 .. -33dB  -4dB -3dB -15dB .. -55dB
+		{0x0216, -54},         //  43 .. 2 0 2 6 .. -24dB -24dB -3dB  -3dB .. -54dB
+		{0x0066, -53},         //  44 .. 0 3 0 6 .. -33dB  -9dB -8dB  -3dB .. -53dB
+		{0x00C4, -52},         //  45 .. 0 6 0 4 .. -33dB  -2dB -8dB  -9dB .. -52dB
+		{0x006E, -51},         //  46 .. 0 3 1 6 .. -33dB  -9dB -6dB  -3dB .. -51dB
+		{0x015D, -50},         //  47 .. 1 2 3 5 .. -30dB -14dB  0dB  -6dB .. -50dB
+		{0x00AD, -49},         //  48 .. 0 5 1 5 .. -33dB  -4dB -6dB  -6dB .. -49dB
+		{0x007D, -48},         //  49 .. 0 3 3 5 .. -33dB  -9dB  0dB  -6dB .. -48dB
+		{0x00D4, -47},         //  50 .. 0 6 2 4 .. -33dB  -2dB -3dB  -9dB .. -47dB
+		{0x01B4, -46},         //  51 .. 1 5 2 4 .. -30dB  -4dB -3dB  -9dB .. -46dB
+		{0x030B, -45},         //  52 .. 3 0 1 3 ..   0dB -24dB -6dB -15dB .. -45dB
+		{0x00CE, -44},         //  53 .. 0 6 1 6 .. -33dB  -2dB -6dB  -3dB .. -44dB
+		{0x01B5, -43},         //  54 .. 1 5 2 5 .. -30dB  -4dB -3dB  -6dB .. -43dB
+		{0x0097, -42},         //  55 .. 0 4 2 7 .. -33dB  -6dB -3dB   0dB .. -42dB
+		{0x0257, -41},         //  56 .. 2 2 2 7 .. -24dB -14dB -3dB   0dB .. -41dB
+		{0x02B4, -40},         //  57 .. 2 5 2 4 .. -24dB  -4dB -3dB  -9dB .. -40dB
+		{0x027D, -39},         //  58 .. 2 3 3 5 .. -24dB  -9dB  0dB  -6dB .. -39dB
+		{0x01DD, -38},         //  59 .. 1 6 3 5 .. -30dB  -2dB  0dB  -6dB .. -38dB
+		{0x02AE, -37},         //  60 .. 2 5 1 6 .. -24dB  -4dB -6dB  -3dB .. -37dB
+		{0x0379, -36},         //  61 .. 3 3 3 1 ..   0dB  -9dB  0dB -27dB .. -36dB
+		{0x035A, -35},         //  62 .. 3 2 3 2 ..   0dB -14dB  0dB -21dB .. -35dB
+		{0x02B6, -34},         //  63 .. 2 5 2 6 .. -24dB  -4dB -3dB  -3dB .. -34dB
+		{0x030E, -33},         //  64 .. 3 0 1 6 ..   0dB -24dB -6dB  -3dB .. -33dB
+		{0x0307, -32},         //  65 .. 3 0 0 7 ..   0dB -24dB -8dB   0dB .. -32dB
+		{0x02BE, -31},         //  66 .. 2 5 3 6 .. -24dB  -4dB  0dB  -3dB .. -31dB
+		{0x037A, -30},         //  67 .. 3 3 3 2 ..   0dB  -9dB  0dB -21dB .. -30dB
+		{0x02DE, -29},         //  68 .. 2 6 3 6 .. -24dB  -2dB  0dB  -3dB .. -29dB
+		{0x0345, -28},         //  69 .. 3 2 0 5 ..   0dB -14dB -8dB  -6dB .. -28dB
+		{0x03A3, -27},         //  70 .. 3 5 0 3 ..   0dB  -4dB -8dB -15dB .. -27dB
+		{0x0364, -26},         //  71 .. 3 3 0 4 ..   0dB  -9dB -8dB  -9dB .. -26dB
+		{0x032F, -25},         //  72 .. 3 1 1 7 ..   0dB -19dB -6dB   0dB .. -25dB
+		{0x0393, -24},         //  73 .. 3 4 2 3 ..   0dB  -6dB -3dB -15dB .. -24dB
+		{0x0384, -23},         //  74 .. 3 4 0 4 ..   0dB  -6dB -8dB  -9dB .. -23dB
+		{0x0347, -22},         //  75 .. 3 2 0 7 ..   0dB -14dB -8dB   0dB .. -22dB
+		{0x03EB, -21},         //  76 .. 3 7 1 3 ..   0dB   0dB -6dB -15dB .. -21dB
+		{0x03D3, -20},         //  77 .. 3 6 2 3 ..   0dB  -2dB -3dB -15dB .. -20dB
+		{0x03BB, -19},         //  78 .. 3 5 3 3 ..   0dB  -4dB  0dB -15dB .. -19dB
+		{0x037C, -18},         //  79 .. 3 3 3 4 ..   0dB  -9dB  0dB  -9dB .. -18dB
+		{0x035E, -17},         //  80 .. 3 2 3 6 ..   0dB -14dB  0dB  -3dB .. -17dB original
+		{0x03C5, -16},         //  81 .. 3 6 0 5 ..   0dB  -2dB -8dB  -6dB .. -16dB
+		{0x03EC, -15},         //  82 .. 3 7 1 4 ..   0dB   0dB -6dB  -9dB .. -15dB
+		{0x035F, -14},         //  83 .. 3 2 3 7 ..   0dB -14dB  0dB   0dB .. -14dB
+		{0x03C6, -13},         //  84 .. 3 6 0 6 ..   0dB  -2dB -8dB  -3dB .. -13dB
+		{0x0377, -12},         //  85 .. 3 3 2 7 ..   0dB  -9dB -3dB   0dB .. -12dB
+		{0x03E6, -11},         //  86 .. 3 7 0 6 ..   0dB   0dB -8dB  -3dB .. -11dB
+		{0x03BD, -10},         //  87 .. 3 5 3 5 ..   0dB  -4dB  0dB  -6dB .. -10dB
+		{0x03F5,  -9},         //  88 .. 3 7 2 5 ..   0dB   0dB -3dB  -6dB ..  -9dB
+		{0x03DD,  -8},         //  89 .. 3 6 3 5 ..   0dB  -2dB  0dB  -6dB ..  -8dB
+		{0x03B7,  -7},         //  90 .. 3 5 2 7 ..   0dB  -4dB -3dB   0dB ..  -7dB
+		{0x03F6,  -6},         //  91 .. 3 7 2 6 ..   0dB   0dB -3dB  -3dB ..  -6dB
+		{0x03D7,  -5},         //  92 .. 3 6 2 7 ..   0dB  -2dB -3dB   0dB ..  -5dB
+		{0x03BF,  -4},         //  93 .. 3 5 3 7 ..   0dB  -4dB  0dB   0dB ..  -4dB
+		{0x03F7,  -3},         //  94 .. 3 7 2 7 ..   0dB   0dB -3dB   0dB ..  -3dB
+		{0x03DF,  -2},         //  95 .. 3 6 3 7 ..   0dB  -2dB  0dB   0dB ..  -2dB
+		{0x03FF,   0}          //  96 .. 3 7 3 7 ..   0dB   0dB  0dB   0dB ..   0dB
 	};

-	const unsigned int original_index = 80;
+	static const unsigned int original_index = 80;

 #endif

-	// total RF gain for each table index
-	int8_t gain_dB[ARRAY_SIZE(gain_table)] = {0};
-
-	// display update rate
-	const unsigned int display_update_rate = 250 / 10;   // max 250ms display update rate
-	unsigned int counter = 0;
+	#ifdef ENABLE_AM_FIX_SHOW_DATA
+		// display update rate
+		static const unsigned int display_update_rate = 250 / 10;   // max 250ms display update rate
+		unsigned int counter = 0;
+	#endif

 	#ifdef ENABLE_AM_FIX_TEST1
 		// user manually sets the table index .. used to calibrate the desired dB gain table
@@ -274,13 +262,6 @@
 			#endif
 		}

-		// pre-compute the total gain for each table index .. saves doing it in real time
-		for (i = 0; i < ARRAY_SIZE(gain_table); i++)
-		{
-			const t_gain_table gains = gain_table[i];
-			gain_dB[i] = lna_short_dB[gains.lna_short] + lna_dB[gains.lna] + mixer_dB[gains.mixer] + pga_dB[gains.pga];
-		}
-
 		#if 0
 		{	// set a maximum gain to use
 //			const int16_t max_gain_dB = gain_dB[original_index];
@@ -288,7 +269,8 @@

 			max_index = ARRAY_SIZE(gain_table);
 			while (--max_index > 1)
-				if (gain_dB[max_index] <= max_gain_dB)
+//				if (gain_dB[max_index] <= max_gain_dB)
+				if (gain_table[max_index].gain_dB <= max_gain_dB)
 					break;
 		}
 		#else
@@ -300,7 +282,9 @@
 	void AM_fix_reset(const int vfo)
 	{	// reset the AM fixer upper

-		counter = 0;
+		#ifdef ENABLE_AM_FIX_SHOW_DATA
+			counter = 0;
+		#endif

 		prev_rssi[vfo] = 0;

@@ -334,7 +318,9 @@
 			case FUNCTION_TRANSMIT:
 			case FUNCTION_BAND_SCOPE:
 			case FUNCTION_POWER_SAVE:
-				counter = display_update_rate;  // queue up a display update as soon as we switch to RX mode
+				#ifdef ENABLE_AM_FIX_SHOW_DATA
+					counter = display_update_rate;  // queue up a display update as soon as we switch to RX mode
+				#endif
 				return;

 			// only adjust stuff if we're in one of these modes
@@ -345,14 +331,16 @@
 				break;
 		}

-		if (counter > 0)
-		{
-			if (++counter >= display_update_rate)
-			{	// trigger a display update
-				counter        = 0;
-				gUpdateDisplay = true;
+		#ifdef ENABLE_AM_FIX_SHOW_DATA
+			if (counter > 0)
+			{
+				if (++counter >= display_update_rate)
+				{	// trigger a display update
+					counter        = 0;
+					gUpdateDisplay = true;
+				}
 			}
-		}
+		#endif

 		{	// sample the current RSSI level
 			// average it with the previous rssi (a bit of noise/spike immunity)
@@ -361,11 +349,14 @@
 			prev_rssi[vfo]         = new_rssi;
 		}

-		{	// save the corrected RSSI level
+		// save the corrected RSSI level
+		#ifdef ENABLE_AM_FIX_SHOW_DATA
+		{
 			const int16_t new_rssi = rssi - rssi_gain_diff[vfo];
 			if (gCurrentRSSI[vfo] != new_rssi)
 			{
 				gCurrentRSSI[vfo] = new_rssi;
+		
 				if (counter == 0)
 				{	// trigger a display update
 					counter        = 1;
@@ -373,6 +364,9 @@
 				}
 			}
 		}
+		#else
+			gCurrentRSSI[vfo] = rssi - rssi_gain_diff[vfo];
+		#endif

 #ifdef ENABLE_AM_FIX_TEST1
 		// user is manually adjusting a gain register - don't do anything automatically
@@ -405,10 +399,12 @@
 			if (diff_dB >= 10)
 			{	// jump immediately to a new gain setting
 				// this greatly speeds up initial gain reduction (but reduces noise/spike immunity)
-				const int16_t desired_gain_dB = (int16_t)gain_dB[index] - diff_dB + 8; // get no closer than 8dB (bit of noise/spike immunity)
+
+				const int16_t desired_gain_dB = (int16_t)gain_table[index].gain_dB - diff_dB + 8; // get no closer than 8dB (bit of noise/spike immunity)
+
 				// scan the table to see what index to jump straight too
 				while (index > 1)
-					if (gain_dB[--index] <= desired_gain_dB)
+					if (gain_table[--index].gain_dB <= desired_gain_dB)
 						break;

 				//index = (gain_table_index[vfo] + index) / 2;  // easy does it
@@ -455,33 +451,35 @@
 			// remember the new table index
 			gain_table_index_prev[vfo] = index;

-			const t_gain_table gains = gain_table[index];
-			BK4819_WriteRegister(BK4819_REG_13, ((uint16_t)gains.lna_short << 8) | ((uint16_t)gains.lna << 5) | ((uint16_t)gains.mixer << 3) | ((uint16_t)gains.pga << 0));
+			BK4819_WriteRegister(BK4819_REG_13, gain_table[index].reg_val);

 			// offset the RSSI reading to the rest of the firmware to cancel out the gain adjustments we make

 			// RF gain difference from original QS setting
-			rssi_gain_diff[vfo] = ((int16_t)gain_dB[index] - gain_dB[original_index]) * 2;
+			rssi_gain_diff[vfo] = ((int16_t)gain_table[index].gain_dB - gain_table[original_index].gain_dB) * 2;
 		}

 		// save the corrected RSSI level
 		gCurrentRSSI[vfo] = rssi - rssi_gain_diff[vfo];

-		if (counter == 0)
-		{
-			counter        = 1;
-			gUpdateDisplay = true;
-		}
+		#ifdef ENABLE_AM_FIX_SHOW_DATA
+			if (counter == 0)
+			{
+				counter        = 1;
+				gUpdateDisplay = true;
+			}
+		#endif
 	}

 	#ifdef ENABLE_AM_FIX_SHOW_DATA

 		void AM_fix_print_data(const int vfo, char *s)
 		{
-			if (s != NULL)
+			if (s != NULL && vfo >= 0 && vfo < (int)ARRAY_SIZE(gain_table_index))
 			{
 				const unsigned int index = gain_table_index[vfo];
-				sprintf(s, "%2u.%u %4ddB %3u", index, ARRAY_SIZE(gain_table) - 1, gain_dB[index], prev_rssi[vfo]);
+//				sprintf(s, "%2u.%u %4ddB %3u", index, ARRAY_SIZE(gain_table) - 1, gain_table[index].gain_dB, prev_rssi[vfo]);
+				sprintf(s, "%2u %4ddB %3u", index, gain_table[index].gain_dB, prev_rssi[vfo]);
 				counter = 0;
 			}
 		}
--- a/app/action.c
+++ b/app/action.c
@@ -84,11 +84,11 @@ void ACTION_Monitor(void)

 	gMonitor = false;
 	
-	if (gScanState != SCAN_OFF)
+	if (gScanStateDir != SCAN_OFF)
 	{
-		ScanPauseDelayIn_10ms = scan_pause_delay_in_1_10ms;
-		gScheduleScanListen   = false;
-		gScanPauseMode        = true;
+		gScanPauseDelayIn_10ms = scan_pause_delay_in_1_10ms;
+		gScheduleScanListen    = false;
+		gScanPauseMode         = true;
 	}

 	#ifdef ENABLE_NOAA
@@ -182,17 +182,36 @@ void ACTION_Scan(bool bRestart)
 		{
 			GUI_SelectNextDisplay(DISPLAY_MAIN);

-			if (gScanState != SCAN_OFF)
-			{
-				SCANNER_Stop();
+			if (gScanStateDir != SCAN_OFF)
+			{	// already scanning
 		
-				#ifdef ENABLE_VOICE
-					gAnotherVoiceID = VOICE_ID_SCANNING_STOP;
-				#endif
+				if (gNextMrChannel <= MR_CHANNEL_LAST)
+				{	// channel mode
+
+					// keep scanning but toggle between scan lists
+					gEeprom.SCAN_LIST_DEFAULT = (gEeprom.SCAN_LIST_DEFAULT + 1) % 3;
+
+					// jump to the next channel
+					CHANNEL_Next(true, gScanStateDir);
+					gScanPauseDelayIn_10ms = 1;
+					gScheduleScanListen    = false;
+
+					gUpdateStatus = true;
+				}
+				else
+				{	// stop scanning
+			
+					SCANNER_Stop();
+
+					#ifdef ENABLE_VOICE
+						gAnotherVoiceID = VOICE_ID_SCANNING_STOP;
+					#endif
+				}
 			}
 			else
-			{
-				CHANNEL_Next(true, 1);
+			{	// start scanning
+	
+				CHANNEL_Next(true, SCAN_FWD);

 				#ifdef ENABLE_VOICE
 					AUDIO_SetVoiceID(0, VOICE_ID_SCANNING_BEGIN);
@@ -200,7 +219,7 @@ void ACTION_Scan(bool bRestart)
 				#endif

 				// clear the other vfo's rssi level (to hide the antenna symbol)
-				gVFO_RSSI_bar_level[gEeprom.RX_CHANNEL == 0] = 0;
+				gVFO_RSSI_bar_level[(gEeprom.RX_VFO + 1) & 1u] = 0;

 				// let the user see DW is not active
 				gDualWatchActive = false;
@@ -209,9 +228,20 @@ void ACTION_Scan(bool bRestart)
 		}
 	}
 	else
-	if (!bRestart)
-	{	// scanning
+//	if (!bRestart)
+	if (!bRestart && gNextMrChannel <= MR_CHANNEL_LAST)
+	{	// channel mode, keep scanning but toggle between scan lists
+		gEeprom.SCAN_LIST_DEFAULT = (gEeprom.SCAN_LIST_DEFAULT + 1) % 3;

+		// jump to the next channel
+		CHANNEL_Next(true, gScanStateDir);
+		gScanPauseDelayIn_10ms = 1;
+		gScheduleScanListen    = false;
+
+		gUpdateStatus = true;
+	}
+	else
+	{	// stop scanning
 		gMonitor = false;
 	
 		SCANNER_Stop();
@@ -224,19 +254,21 @@ void ACTION_Scan(bool bRestart)
 	}
 }

-void ACTION_Vox(void)
-{
-	gEeprom.VOX_SWITCH   = !gEeprom.VOX_SWITCH;
-	gRequestSaveSettings = true;
-	gFlagReconfigureVfos = true;
-	#ifdef ENABLE_VOICE
-		gAnotherVoiceID  = VOICE_ID_VOX;
-	#endif
-	gUpdateStatus        = true;
-}
+#ifdef ENABLE_VOX
+	void ACTION_Vox(void)
+	{
+		gEeprom.VOX_SWITCH   = !gEeprom.VOX_SWITCH;
+		gRequestSaveSettings = true;
+		gFlagReconfigureVfos = true;
+		#ifdef ENABLE_VOICE
+			gAnotherVoiceID  = VOICE_ID_VOX;
+		#endif
+		gUpdateStatus        = true;
+	}
+#endif

 #if defined(ENABLE_ALARM) || defined(ENABLE_TX1750)
-	static void ACTION_AlarmOr1750(bool b1750)
+	static void ACTION_AlarmOr1750(const bool b1750)
 	{
 		gInputBoxIndex = 0;

@@ -252,7 +284,7 @@ void ACTION_Vox(void)

 		gFlagPrepareTX = true;

-//		if (gScreenToDisplay != DISPLAY_MENU)     // 1of11 .. don't close the menu
+		if (gScreenToDisplay != DISPLAY_MENU)     // 1of11 .. don't close the menu
 			gRequestDisplayScreen = DISPLAY_MAIN;
 	}
 #endif
@@ -268,7 +300,9 @@ void ACTION_Vox(void)
 				FM_TurnOff();

 				gInputBoxIndex        = 0;
-				gVoxResumeCountdown   = 80;
+				#ifdef ENABLE_VOX
+					gVoxResumeCountdown = 80;
+				#endif
 				gFlagReconfigureVfos  = true;

 				gRequestDisplayScreen = DISPLAY_MAIN;
@@ -299,10 +333,11 @@ void ACTION_Handle(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 		if (Key == KEY_SIDE1 && !bKeyHeld && bKeyPressed)
 		{
 			gBeepToPlay = BEEP_1KHZ_60MS_OPTIONAL;
-			if (gDTMF_InputIndex > 0)
+
+			if (gDTMF_InputBox_Index > 0)
 			{
-				gDTMF_InputBox[--gDTMF_InputIndex] = '-';
-				if (gDTMF_InputIndex > 0)
+				gDTMF_InputBox[--gDTMF_InputBox_Index] = '-';
+				if (gDTMF_InputBox_Index > 0)
 				{
 					gPttWasReleased       = true;
 					gRequestDisplayScreen = DISPLAY_MAIN;
@@ -369,7 +404,9 @@ void ACTION_Handle(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 			ACTION_Scan(true);
 			break;
 		case ACTION_OPT_VOX:
-			ACTION_Vox();
+			#ifdef ENABLE_VOX
+				ACTION_Vox();
+			#endif
 			break;
 		case ACTION_OPT_ALARM:
 			#ifdef ENABLE_ALARM
--- a/app/action.h
+++ b/app/action.h
@@ -23,7 +23,9 @@
 void ACTION_Power(void);
 void ACTION_Monitor(void);
 void ACTION_Scan(bool bFlag);
-void ACTION_Vox(void);
+#ifdef ENABLE_VOX
+	void ACTION_Vox(void);
+#endif
 #ifdef ENABLE_ALARM
 	//static void ACTION_AlarmOr1750(bool b1750)
 #endif
--- a/app/app.c
+++ b/app/app.c
--- a/app/app.h
+++ b/app/app.h
@@ -29,7 +29,7 @@ extern const uint8_t orig_mixer;
 extern const uint8_t orig_pga;

 void     APP_EndTransmission(void);
-void     CHANNEL_Next(bool bFlag, int8_t Direction);
+void     CHANNEL_Next(const bool bFlag, const int8_t scan_direction);
 void     APP_StartListening(FUNCTION_Type_t Function, const bool reset_am_fix);
 uint32_t APP_SetFrequencyByStep(VFO_Info_t *pInfo, int8_t Step);
 void     APP_Update(void);
--- a/app/dtmf.c
+++ b/app/dtmf.c
@@ -36,9 +36,9 @@
 char              gDTMF_String[15];

 char              gDTMF_InputBox[15];
-uint8_t           gDTMF_InputIndex    = 0;
-bool              gDTMF_InputMode     = false;
-uint8_t           gDTMF_PreviousIndex = 0;
+uint8_t           gDTMF_InputBox_Index = 0;
+bool              gDTMF_InputMode      = false;
+uint8_t           gDTMF_PreviousIndex  = 0;

 char              gDTMF_RX[17];
 uint8_t           gDTMF_RX_index   = 0;
@@ -54,8 +54,8 @@ char              gDTMF_Caller[4];
 char              gDTMF_Callee[4];
 DTMF_State_t      gDTMF_State;
 uint8_t           gDTMF_DecodeRingCountdown_500ms;
-uint8_t           gDTMFChosenContact;
-uint8_t           gDTMF_AUTO_RESET_TIME;
+uint8_t           gDTMF_chosen_contact;
+uint8_t           gDTMF_auto_reset_time_500ms;
 DTMF_CallState_t  gDTMF_CallState;
 DTMF_ReplyState_t gDTMF_ReplyState;
 DTMF_CallMode_t   gDTMF_CallMode;
@@ -133,8 +133,26 @@ bool DTMF_FindContact(const char *pContact, char *pResult)

 char DTMF_GetCharacter(const unsigned int code)
 {
-	const char list[] = "0123456789ABCD*#";
-	return (code < ARRAY_SIZE(list)) ? list[code] : 0xFF;
+	switch (code)
+	{
+		case KEY_0:    return '0';
+		case KEY_1:    return '1';
+		case KEY_2:    return '2';
+		case KEY_3:    return '3';
+		case KEY_4:    return '4';
+		case KEY_5:    return '5';
+		case KEY_6:    return '6';
+		case KEY_7:    return '7';
+		case KEY_8:    return '8';
+		case KEY_9:    return '9';
+		case KEY_MENU: return 'A';
+		case KEY_UP:   return 'B';
+		case KEY_DOWN: return 'C';
+		case KEY_EXIT: return 'D';
+		case KEY_STAR: return '*';
+		case KEY_F:    return '#';
+		default:       return 0xff;
+	}
 }

 bool DTMF_CompareMessage(const char *pMsg, const char *pTemplate, const unsigned int size, const bool bCheckGroup)
@@ -163,16 +181,23 @@ DTMF_CallMode_t DTMF_CheckGroupCall(const char *pMsg, const unsigned int size)
 	return (i < size) ? DTMF_CALL_MODE_GROUP : DTMF_CALL_MODE_NOT_GROUP;
 }

+void DTMF_clear_input_box(void)
+{
+	memset(gDTMF_InputBox, 0, sizeof(gDTMF_InputBox));
+	gDTMF_InputBox_Index = 0;
+	gDTMF_InputMode      = false;
+}
+
 void DTMF_Append(const char code)
 {
-	if (gDTMF_InputIndex == 0)
+	if (gDTMF_InputBox_Index == 0)
 	{
-		memset(gDTMF_InputBox, '-', sizeof(gDTMF_InputBox));
+		memset(gDTMF_InputBox, '-', sizeof(gDTMF_InputBox) - 1);
 		gDTMF_InputBox[sizeof(gDTMF_InputBox) - 1] = 0;
 	}

-	if (gDTMF_InputIndex < sizeof(gDTMF_InputBox))
-		gDTMF_InputBox[gDTMF_InputIndex++] = code;
+	if (gDTMF_InputBox_Index < (sizeof(gDTMF_InputBox) - 1))
+		gDTMF_InputBox[gDTMF_InputBox_Index++] = code;
 }

 void DTMF_HandleRequest(void)
@@ -184,7 +209,7 @@ void DTMF_HandleRequest(void)
 	if (!gDTMF_RX_pending)
 		return;   // nothing new received

-	if (gScanState != SCAN_OFF || gCssScanMode != CSS_SCAN_MODE_OFF)
+	if (gScanStateDir != SCAN_OFF || gCssScanMode != CSS_SCAN_MODE_OFF)
 	{	// we're busy scanning
 		DTMF_clear_RX();
 		return;
@@ -331,6 +356,9 @@ void DTMF_HandleRequest(void)

 			gUpdateDisplay = true;

+			#pragma GCC diagnostic push
+			#pragma GCC diagnostic ignored "-Wimplicit-fallthrough="
+
 			switch (gEeprom.DTMF_DECODE_RESPONSE)
 			{
 				case DTMF_DEC_RESPONSE_BOTH:
@@ -348,6 +376,8 @@ void DTMF_HandleRequest(void)
 					break;
 			}

+			#pragma GCC diagnostic pop
+
 			if (gDTMF_IsGroupCall)
 				gDTMF_ReplyState = DTMF_REPLY_NONE;
 		}
@@ -385,8 +415,9 @@ void DTMF_Reply(void)

 		default:
 		case DTMF_REPLY_NONE:
-			if (gDTMF_CallState != DTMF_CALL_STATE_NONE        ||
-			    gCurrentVfo->DTMF_PTT_ID_TX_MODE == PTT_ID_OFF ||
+			if (gDTMF_CallState != DTMF_CALL_STATE_NONE           ||
+			    gCurrentVfo->DTMF_PTT_ID_TX_MODE == PTT_ID_APOLLO ||
+			    gCurrentVfo->DTMF_PTT_ID_TX_MODE == PTT_ID_OFF    ||
 			    gCurrentVfo->DTMF_PTT_ID_TX_MODE == PTT_ID_TX_DOWN)
 			{
 				gDTMF_ReplyState = DTMF_REPLY_NONE;
@@ -403,13 +434,12 @@ void DTMF_Reply(void)
 	if (pString == NULL)
 		return;

-	Delay = gEeprom.DTMF_PRELOAD_TIME;
+	Delay = (gEeprom.DTMF_PRELOAD_TIME < 200) ? 200 : gEeprom.DTMF_PRELOAD_TIME;

 	if (gEeprom.DTMF_SIDE_TONE)
-	{	// the will also hear the transmitted tones
+	{	// the user will also hear the transmitted tones
 		GPIO_SetBit(&GPIOC->DATA, GPIOC_PIN_AUDIO_PATH);
 		gEnableSpeaker = true;
-		Delay = (gEeprom.DTMF_PRELOAD_TIME < 60) ? 60 : gEeprom.DTMF_PRELOAD_TIME;
 	}

 	SYSTEM_DelayMs(Delay);
--- a/app/dtmf.h
+++ b/app/dtmf.h
@@ -33,7 +33,8 @@ typedef enum DTMF_State_t DTMF_State_t;
 enum DTMF_CallState_t {
 	DTMF_CALL_STATE_NONE = 0,
 	DTMF_CALL_STATE_CALL_OUT,
-	DTMF_CALL_STATE_RECEIVED
+	DTMF_CALL_STATE_RECEIVED,
+	DTMF_CALL_STATE_RECEIVED_STAY
 };

 enum DTMF_DecodeResponse_t {
@@ -60,12 +61,17 @@ enum DTMF_CallMode_t {
 	DTMF_CALL_MODE_DTMF
 };

+enum {  // seconds
+	DTMF_HOLD_MIN =  5,
+	DTMF_HOLD_MAX = 60
+};
+
 typedef enum DTMF_CallMode_t DTMF_CallMode_t;

 extern char              gDTMF_String[15];

 extern char              gDTMF_InputBox[15];
-extern uint8_t           gDTMF_InputIndex;
+extern uint8_t           gDTMF_InputBox_Index;
 extern bool              gDTMF_InputMode;
 extern uint8_t           gDTMF_PreviousIndex;

@@ -83,8 +89,8 @@ extern char              gDTMF_Caller[4];
 extern char              gDTMF_Callee[4];
 extern DTMF_State_t      gDTMF_State;
 extern uint8_t           gDTMF_DecodeRingCountdown_500ms;
-extern uint8_t           gDTMFChosenContact;
-extern uint8_t           gDTMF_AUTO_RESET_TIME;
+extern uint8_t           gDTMF_chosen_contact;
+extern uint8_t           gDTMF_auto_reset_time_500ms;
 extern DTMF_CallState_t  gDTMF_CallState;
 extern DTMF_ReplyState_t gDTMF_ReplyState;
 extern DTMF_CallMode_t   gDTMF_CallMode;
@@ -98,6 +104,7 @@ bool DTMF_FindContact(const char *pContact, char *pResult);
 char DTMF_GetCharacter(const unsigned int code);
 bool DTMF_CompareMessage(const char *pDTMF, const char *pTemplate, const unsigned int size, const bool bFlag);
 DTMF_CallMode_t DTMF_CheckGroupCall(const char *pDTMF, const unsigned int size);
+void DTMF_clear_input_box(void);
 void DTMF_Append(const char vode);
 void DTMF_HandleRequest(void);
 void DTMF_Reply(void);
--- a/app/generic.c
+++ b/app/generic.c
@@ -52,12 +52,22 @@ void GENERIC_Key_F(bool bKeyPressed, bool bKeyHeld)
 			if (!bKeyPressed)
 				return;

-			#ifdef ENABLE_VOICE
-				gAnotherVoiceID = gEeprom.KEY_LOCK ? VOICE_ID_UNLOCK : VOICE_ID_LOCK;
-			#endif
+			if (gScreenToDisplay != DISPLAY_MENU &&
+			    gScreenToDisplay != DISPLAY_FM &&
+			    #ifdef ENABLE_FMRADIO
+					!gFmRadioMode &&
+			    #endif
+			    gCurrentFunction != FUNCTION_TRANSMIT)
+			{	// toggle the keyboad lock

-			gEeprom.KEY_LOCK = !gEeprom.KEY_LOCK;
-			gRequestSaveSettings = true;
+				#ifdef ENABLE_VOICE
+					gAnotherVoiceID = gEeprom.KEY_LOCK ? VOICE_ID_UNLOCK : VOICE_ID_LOCK;
+				#endif
+
+				gEeprom.KEY_LOCK = !gEeprom.KEY_LOCK;
+
+				gRequestSaveSettings = true;
+			}
 		}
 		else
 		{
@@ -71,6 +81,9 @@ void GENERIC_Key_F(bool bKeyPressed, bool bKeyHeld)

 			gWasFKeyPressed = !gWasFKeyPressed;

+			if (gWasFKeyPressed)
+				gKeyInputCountdown = key_input_timeout_500ms;
+
 			#ifdef ENABLE_VOICE
 				if (!gWasFKeyPressed)
 					gAnotherVoiceID = VOICE_ID_CANCEL;
@@ -96,6 +109,7 @@ void GENERIC_Key_F(bool bKeyPressed, bool bKeyHeld)
 		#endif

 		gBeepToPlay     = BEEP_440HZ_500MS;
+
 		gPttWasReleased = true;
 	}
 }
@@ -105,159 +119,154 @@ void GENERIC_Key_PTT(bool bKeyPressed)
 	gInputBoxIndex = 0;

 	if (!bKeyPressed || gSerialConfigCountDown_500ms > 0)
-	{
-		//if (gScreenToDisplay == DISPLAY_MAIN)
-		{
-			if (gCurrentFunction == FUNCTION_TRANSMIT)
+	{	// PTT released
+
+		if (gCurrentFunction == FUNCTION_TRANSMIT)
+		{	// we are transmitting .. stop
+
+			if (gFlagEndTransmission)
 			{
-				if (gFlagEndTransmission)
-				{
-					FUNCTION_Select(FUNCTION_FOREGROUND);
-				}
-				else
-				{
-					APP_EndTransmission();
-
-					if (gEeprom.REPEATER_TAIL_TONE_ELIMINATION == 0)
-					{
-						FUNCTION_Select(FUNCTION_FOREGROUND);
-					}
-					else
-						gRTTECountdown = gEeprom.REPEATER_TAIL_TONE_ELIMINATION * 10;
-				}
-
-				gFlagEndTransmission = false;
-				gVOX_NoiseDetected   = false;
+				FUNCTION_Select(FUNCTION_FOREGROUND);
 			}
+			else
+			{
+				APP_EndTransmission();
+
+				if (gEeprom.REPEATER_TAIL_TONE_ELIMINATION == 0)
+					FUNCTION_Select(FUNCTION_FOREGROUND);
+				else
+					gRTTECountdown = gEeprom.REPEATER_TAIL_TONE_ELIMINATION * 10;
+			}
+
+			gFlagEndTransmission = false;
+
+			#ifdef ENABLE_VOX
+				gVOX_NoiseDetected = false;
+			#endif

 			RADIO_SetVfoState(VFO_STATE_NORMAL);

 			if (gScreenToDisplay != DISPLAY_MENU)     // 1of11 .. don't close the menu
 				gRequestDisplayScreen = DISPLAY_MAIN;
-
-			return;
 		}

-		gInputBoxIndex = 0;
 		return;
 	}

-	if (gScanState != SCAN_OFF)
-	{
-		SCANNER_Stop();
+	// PTT pressed

-		gPttDebounceCounter   = 0;
-		gPttIsPressed         = false;
+	if (gScanStateDir != SCAN_OFF ||             // frequency/channel scanning
+	    gScreenToDisplay == DISPLAY_SCANNER ||   // CTCSS/CDCSS scanning
+	    gCssScanMode != CSS_SCAN_MODE_OFF)       //   "     "
+	{	// we're scanning .. stop

-		if (gScreenToDisplay != DISPLAY_MENU)     // 1of11 .. don't close the menu
-			gRequestDisplayScreen = DISPLAY_MAIN;
-
-		return;
-	}
-
-	#ifdef ENABLE_FMRADIO
-		if (gFM_ScanState == FM_SCAN_OFF)
-	#endif
-	{
-		if (gCssScanMode == CSS_SCAN_MODE_OFF)
-		{
-			#ifdef ENABLE_FMRADIO
-				if (gScreenToDisplay == DISPLAY_FM)
-				{
-					gRequestDisplayScreen = DISPLAY_MAIN;
-					gInputBoxIndex        = 0;
-					gPttIsPressed         = false;
-					gPttDebounceCounter   = 0;
-					return;
-				}
-			#endif
-
-			if (gScreenToDisplay != DISPLAY_SCANNER)
-			{
-				if (gCurrentFunction == FUNCTION_TRANSMIT && gRTTECountdown == 0)
-				{
-					gInputBoxIndex = 0;
-					return;
-				}
-
-				gFlagPrepareTX = true;
-
-				if (gDTMF_InputMode)
-				{
-					if (gDTMF_InputIndex > 0 || gDTMF_PreviousIndex > 0)
-					{
-						if (gDTMF_InputIndex == 0)
-							gDTMF_InputIndex = gDTMF_PreviousIndex;
-
-						gDTMF_InputBox[gDTMF_InputIndex] = 0;
-
-						#if 0
-							// append our DTMF ID to the inputted DTMF code -
-							//  IF the user inputted code is exactly 3 digits long
-							if (gDTMF_InputIndex == 3)
-								gDTMF_CallMode = DTMF_CheckGroupCall(gDTMF_InputBox, 3);
-							else
-						#else
-							// append our DTMF ID to the inputted DTMF code -
-							//  IF the user inputted code is exactly 3 digits long and D-DCD is enabled
-							if (gDTMF_InputIndex == 3 && gTxVfo->DTMF_DECODING_ENABLE > 0)
-								gDTMF_CallMode = DTMF_CheckGroupCall(gDTMF_InputBox, 3);
-							else
-						#endif
-							gDTMF_CallMode = DTMF_CALL_MODE_DTMF;
-
-						strcpy(gDTMF_String, gDTMF_InputBox);
-
-						gDTMF_PreviousIndex = gDTMF_InputIndex;
-						gDTMF_ReplyState    = DTMF_REPLY_ANI;
-						gDTMF_State         = DTMF_STATE_0;
-					}
-
-					if (gScreenToDisplay != DISPLAY_MENU)     // 1of11 .. don't close the menu
-						gRequestDisplayScreen = DISPLAY_MAIN;
-
-					gDTMF_InputMode = false;
-					gDTMF_InputIndex = 0;
-					return;
-				}
-
-				if (gScreenToDisplay != DISPLAY_MENU)     // 1of11 .. don't close the menu
-					gRequestDisplayScreen = DISPLAY_MAIN;
-
-				gFlagPrepareTX        = true;
-				gInputBoxIndex        = 0;
-
-				return;
-			}
-
-			if (gScreenToDisplay != DISPLAY_MENU)     // 1of11 .. don't close the menu
-				gRequestDisplayScreen    = DISPLAY_MAIN;
-
-			gEeprom.CROSS_BAND_RX_TX = gBackupCROSS_BAND_RX_TX;
-			gUpdateStatus            = true;
+		if (gScreenToDisplay == DISPLAY_SCANNER)
+		{	// CTCSS/CDCSS scanning .. stop
+			gEeprom.CROSS_BAND_RX_TX = gBackup_CROSS_BAND_RX_TX;
 			gFlagStopScan            = true;
 			gVfoConfigureMode        = VFO_CONFIGURE_RELOAD;
 			gFlagResetVfos           = true;
 		}
 		else
-		{
+		if (gScanStateDir != SCAN_OFF)
+		{	// frequency/channel scanning . .stop
+			SCANNER_Stop();
+		}
+		else
+		if (gCssScanMode != CSS_SCAN_MODE_OFF)
+		{	// CTCSS/CDCSS scanning .. stop
 			MENU_StopCssScan();

-			if (gScreenToDisplay != DISPLAY_MENU)     // 1of11 .. don't close the menu
-				gRequestDisplayScreen = DISPLAY_MENU;
+			#ifdef ENABLE_VOICE
+				gAnotherVoiceID = VOICE_ID_SCANNING_STOP;
+			#endif
 		}
+
+		goto cancel_tx;
 	}
+
 	#ifdef ENABLE_FMRADIO
-		else
-		{
+		if (gFM_ScanState != FM_SCAN_OFF)
+		{	// FM radio is scanning .. stop
 			FM_PlayAndUpdate();
+			#ifdef ENABLE_VOICE
+				gAnotherVoiceID = VOICE_ID_SCANNING_STOP;
+			#endif
 			gRequestDisplayScreen = DISPLAY_FM;
+			goto cancel_tx;
 		}
 	#endif

-	#ifdef ENABLE_VOICE
-		gAnotherVoiceID = VOICE_ID_SCANNING_STOP;
+	#ifdef ENABLE_FMRADIO
+		if (gScreenToDisplay == DISPLAY_FM)
+			goto start_tx;	// listening to the FM radio .. start TX'ing
 	#endif

-	gPttWasPressed  = true;
+	if (gCurrentFunction == FUNCTION_TRANSMIT && gRTTECountdown == 0)
+	{	// already transmitting
+		gInputBoxIndex = 0;
+		return;
+	}
+
+	if (gScreenToDisplay != DISPLAY_MENU)     // 1of11 .. don't close the menu
+		gRequestDisplayScreen = DISPLAY_MAIN;
+
+	if (!gDTMF_InputMode && gDTMF_InputBox_Index == 0)
+		goto start_tx;	// wasn't entering a DTMF code .. start TX'ing (maybe)
+
+	// was entering a DTMF string
+
+	if (gDTMF_InputBox_Index > 0 || gDTMF_PreviousIndex > 0)
+	{	// going to transmit a DTMF string
+
+		if (gDTMF_InputBox_Index == 0 && gDTMF_PreviousIndex > 0)
+			gDTMF_InputBox_Index = gDTMF_PreviousIndex;           // use the previous DTMF string
+
+		if (gDTMF_InputBox_Index < sizeof(gDTMF_InputBox))
+			gDTMF_InputBox[gDTMF_InputBox_Index] = 0;             // NULL term the string
+
+		#if 0
+			// append our DTMF ID to the inputted DTMF code -
+			//  IF the user inputted code is exactly 3 digits long
+			if (gDTMF_InputBox_Index == 3)
+				gDTMF_CallMode = DTMF_CheckGroupCall(gDTMF_InputBox, 3);
+			else
+				gDTMF_CallMode = DTMF_CALL_MODE_DTMF;
+		#else
+			// append our DTMF ID to the inputted DTMF code -
+			//  IF the user inputted code is exactly 3 digits long and D-DCD is enabled
+			if (gDTMF_InputBox_Index == 3 && gTxVfo->DTMF_DECODING_ENABLE > 0)
+				gDTMF_CallMode = DTMF_CheckGroupCall(gDTMF_InputBox, 3);
+			else
+				gDTMF_CallMode = DTMF_CALL_MODE_DTMF;
+		#endif
+
+		// remember the DTMF string
+		gDTMF_PreviousIndex = gDTMF_InputBox_Index;
+		strcpy(gDTMF_String, gDTMF_InputBox);
+
+		gDTMF_ReplyState = DTMF_REPLY_ANI;
+		gDTMF_State      = DTMF_STATE_0;
+	}
+
+	DTMF_clear_input_box();
+
+start_tx:
+	// request start TX
+	gFlagPrepareTX = true;
+	goto done;
+	
+cancel_tx:
+	if (gPttIsPressed)
+	{
+		gPttIsPressed  = false;
+		gPttWasPressed = true;
+	}
+
+done:	
+	gPttDebounceCounter = 0;
+	if (gScreenToDisplay != DISPLAY_MENU && gRequestDisplayScreen != DISPLAY_FM)     // 1of11 .. don't close the menu
+		gRequestDisplayScreen = DISPLAY_MAIN;
+	gUpdateStatus  = true;
+	gUpdateDisplay = true;
 }
--- a/app/main.c
+++ b/app/main.c
@@ -28,6 +28,7 @@
 #include "app/spectrum.h"
 #endif
 #include "audio.h"
+#include "board.h"
 #include "driver/bk4819.h"
 #include "dtmf.h"
 #include "frequencies.h"
@@ -36,11 +37,51 @@
 #include "settings.h"
 #include "ui/inputbox.h"
 #include "ui/ui.h"
+#ifdef ENABLE_SPECTRUM
+//	#include "app/spectrum.h"
+#endif
+
+void toggle_chan_scanlist(void)
+{	// toggle the selected channels scanlist setting
+
+	if (gScreenToDisplay == DISPLAY_SCANNER || !IS_MR_CHANNEL(gTxVfo->CHANNEL_SAVE))
+		return;
+
+	if (gTxVfo->SCANLIST1_PARTICIPATION)
+	{
+		if (gTxVfo->SCANLIST2_PARTICIPATION)
+			gTxVfo->SCANLIST1_PARTICIPATION = 0;
+		else
+			gTxVfo->SCANLIST2_PARTICIPATION = 1;
+	}
+	else
+	{
+		if (gTxVfo->SCANLIST2_PARTICIPATION)
+			gTxVfo->SCANLIST2_PARTICIPATION = 0;
+		else
+			gTxVfo->SCANLIST1_PARTICIPATION = 1;
+	}
+
+	SETTINGS_UpdateChannel(gTxVfo->CHANNEL_SAVE, gTxVfo, true);
+
+	gVfoConfigureMode = VFO_CONFIGURE;
+	gFlagResetVfos    = true;
+}

 static void processFKeyFunction(const KEY_Code_t Key, const bool beep)
 {
 	uint8_t Band;
-	uint8_t Vfo = gEeprom.TX_CHANNEL;
+	uint8_t Vfo = gEeprom.TX_VFO;
+
+	if (gScreenToDisplay == DISPLAY_MENU)
+	{
+//		if (beep)
+			gBeepToPlay = BEEP_500HZ_60MS_DOUBLE_BEEP_OPTIONAL;
+		return;
+	}
+	
+//	if (beep)
+		gBeepToPlay = BEEP_1KHZ_60MS_OPTIONAL;

 	switch (Key)
 	{
@@ -50,7 +91,7 @@ static void processFKeyFunction(const KEY_Code_t Key, const bool beep)
 			#else


-				// TODO: do something useful with the key
+				// TODO: make use of this function key


 			#endif
@@ -101,7 +142,7 @@ static void processFKeyFunction(const KEY_Code_t Key, const bool beep)
 			if (gEeprom.DUAL_WATCH == DUAL_WATCH_CHAN_B)
 				gEeprom.DUAL_WATCH = DUAL_WATCH_CHAN_A;
 			else
-				gEeprom.TX_CHANNEL = (Vfo == 0);
+				gEeprom.TX_VFO = (Vfo + 1) & 1u;

 			gRequestSaveSettings  = 1;
 			gFlagReconfigureVfos  = true;
@@ -123,8 +164,8 @@ static void processFKeyFunction(const KEY_Code_t Key, const bool beep)
 				uint8_t Channel;

 				if (IS_MR_CHANNEL(gTxVfo->CHANNEL_SAVE))
-				{
-					gEeprom.ScreenChannel[Vfo] = gEeprom.FreqChannel[gEeprom.TX_CHANNEL];
+				{	// swap to frequency mode
+					gEeprom.ScreenChannel[Vfo] = gEeprom.FreqChannel[gEeprom.TX_VFO];
 					#ifdef ENABLE_VOICE
 						gAnotherVoiceID        = VOICE_ID_FREQUENCY_MODE;
 					#endif
@@ -133,9 +174,9 @@ static void processFKeyFunction(const KEY_Code_t Key, const bool beep)
 					break;
 				}

-				Channel = RADIO_FindNextChannel(gEeprom.MrChannel[gEeprom.TX_CHANNEL], 1, false, 0);
+				Channel = RADIO_FindNextChannel(gEeprom.MrChannel[gEeprom.TX_VFO], 1, false, 0);
 				if (Channel != 0xFF)
-				{
+				{	// swap to channel mode
 					gEeprom.ScreenChannel[Vfo] = Channel;
 					#ifdef ENABLE_VOICE
 						AUDIO_SetVoiceID(0, VOICE_ID_CHANNEL_MODE);
@@ -157,7 +198,7 @@ static void processFKeyFunction(const KEY_Code_t Key, const bool beep)
 			gWasFKeyPressed          = false;
 			gFlagStartScan           = true;
 			gScanSingleFrequency     = false;
-			gBackupCROSS_BAND_RX_TX  = gEeprom.CROSS_BAND_RX_TX;
+			gBackup_CROSS_BAND_RX_TX  = gEeprom.CROSS_BAND_RX_TX;
 			gEeprom.CROSS_BAND_RX_TX = CROSS_BAND_OFF;
 			gUpdateStatus            = true;

@@ -169,47 +210,31 @@ static void processFKeyFunction(const KEY_Code_t Key, const bool beep)
 		case KEY_5:
 			if(beep) {
 			#ifdef ENABLE_NOAA
+
 				if (IS_NOT_NOAA_CHANNEL(gTxVfo->CHANNEL_SAVE))
 				{
-					gEeprom.ScreenChannel[Vfo] = gEeprom.NoaaChannel[gEeprom.TX_CHANNEL];
+					gEeprom.ScreenChannel[Vfo] = gEeprom.NoaaChannel[gEeprom.TX_VFO];
 				}
 				else
 				{
-					gEeprom.ScreenChannel[Vfo] = gEeprom.FreqChannel[gEeprom.TX_CHANNEL];
+					gEeprom.ScreenChannel[Vfo] = gEeprom.FreqChannel[gEeprom.TX_VFO];
 					#ifdef ENABLE_VOICE
 						gAnotherVoiceID = VOICE_ID_FREQUENCY_MODE;
 					#endif
 				}
 				gRequestSaveVFO   = true;
 				gVfoConfigureMode = VFO_CONFIGURE_RELOAD;
-			#elif defined(ENABLE_SPECTRUM)
+#elif defined(ENABLE_SPECTRUM)
 				APP_RunSpectrum();
 				gRequestDisplayScreen = DISPLAY_MAIN;
-			#endif
+#endif
 			}
 			else {
-				// toggle scanlist-1 and scanlist 2
-				if (gScreenToDisplay != DISPLAY_SCANNER)
-				{
-					if (gTxVfo->SCANLIST1_PARTICIPATION)
-					{
-						if (gTxVfo->SCANLIST2_PARTICIPATION)
-							gTxVfo->SCANLIST1_PARTICIPATION = 0;
-						else
-							gTxVfo->SCANLIST2_PARTICIPATION = 1;
-					}
-					else
-					{
-						if (gTxVfo->SCANLIST2_PARTICIPATION)
-							gTxVfo->SCANLIST2_PARTICIPATION = 0;
-						else
-							gTxVfo->SCANLIST1_PARTICIPATION = 1;
-					}
-					SETTINGS_UpdateChannel(gTxVfo->CHANNEL_SAVE, gTxVfo, true);
-					gVfoConfigureMode = VFO_CONFIGURE;
-					gFlagResetVfos    = true;
-				}
+			#ifdef ENABLE_VOX
+				toggle_chan_scanlist();
+			#endif
 			}
+
 			break;

 		case KEY_6:
@@ -217,7 +242,11 @@ static void processFKeyFunction(const KEY_Code_t Key, const bool beep)
 			break;

 		case KEY_7:
-			ACTION_Vox();
+			#ifdef ENABLE_VOX
+				ACTION_Vox();
+			#else
+				toggle_chan_scanlist();
+			#endif
 			break;

 		case KEY_8:
@@ -259,45 +288,36 @@ static void MAIN_Key_DIGITS(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 	if (bKeyHeld)
 	{	// key held down

-		#ifdef ENABLE_MAIN_KEY_HOLD
-			if (bKeyPressed)
+		if (bKeyPressed)
+		{
+			if (gScreenToDisplay == DISPLAY_MAIN)
 			{
-				if (gScreenToDisplay == DISPLAY_MAIN)
-				{
-					if (gInputBoxIndex > 0)
-					{	// delete any inputted chars
-						gInputBoxIndex        = 0;
-						gRequestDisplayScreen = DISPLAY_MAIN;
-					}
-
-					gWasFKeyPressed = false;
-					gUpdateStatus   = true;
-
-					processFKeyFunction(Key, false);
+				if (gInputBoxIndex > 0)
+				{	// delete any inputted chars
+					gInputBoxIndex        = 0;
+					gRequestDisplayScreen = DISPLAY_MAIN;
 				}
+
+				gWasFKeyPressed = false;
+				gUpdateStatus   = true;
+
+				processFKeyFunction(Key, false);
 			}
-		#endif
+		}

 		return;
 	}

-	#ifdef ENABLE_MAIN_KEY_HOLD
-		if (bKeyPressed)
-		{	// key is pressed
-			gBeepToPlay = BEEP_1KHZ_60MS_OPTIONAL;  // beep when key is pressed
-			return;                                 // don't use the key till it's released
-		}
-	#else
-		if (!bKeyPressed)
-			return;
-
-		gBeepToPlay = BEEP_1KHZ_60MS_OPTIONAL;
-	#endif
+	if (bKeyPressed)
+	{	// key is pressed
+		gBeepToPlay = BEEP_1KHZ_60MS_OPTIONAL;  // beep when key is pressed
+		return;                                 // don't use the key till it's released
+	}

 	if (!gWasFKeyPressed)
 	{	// F-key wasn't pressed

-		const uint8_t Vfo = gEeprom.TX_CHANNEL;
+		const uint8_t Vfo = gEeprom.TX_VFO;

 		gKeyInputCountdown = key_input_timeout_500ms;

@@ -345,7 +365,7 @@ static void MAIN_Key_DIGITS(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 //			if (IS_NOT_NOAA_CHANNEL(gTxVfo->CHANNEL_SAVE))
 //		#endif
 		if (IS_FREQ_CHANNEL(gTxVfo->CHANNEL_SAVE))
-		{	// user is entering frequency
+		{	// user is entering a frequency

 			uint32_t Frequency;

@@ -478,7 +498,7 @@ static void MAIN_Key_EXIT(bool bKeyPressed, bool bKeyHeld)
 			if (!gFmRadioMode)
 		#endif
 		{
-			if (gScanState == SCAN_OFF)
+			if (gScanStateDir == SCAN_OFF)
 			{
 				if (gInputBoxIndex == 0)
 					return;
@@ -514,10 +534,10 @@ static void MAIN_Key_EXIT(bool bKeyPressed, bool bKeyHeld)
 	if (bKeyHeld && bKeyPressed)
 	{	// exit key held down

-		if (gInputBoxIndex > 0)
+		if (gInputBoxIndex > 0 || gDTMF_InputBox_Index > 0 || gDTMF_InputMode)
 		{	// cancel key input mode (channel/frequency entry)
 			gDTMF_InputMode       = false;
-			gDTMF_InputIndex      = 0;
+			gDTMF_InputBox_Index  = 0;
 			memset(gDTMF_String, 0, sizeof(gDTMF_String));
 			gInputBoxIndex        = 0;
 			gRequestDisplayScreen = DISPLAY_MAIN;
@@ -528,11 +548,18 @@ static void MAIN_Key_EXIT(bool bKeyPressed, bool bKeyHeld)

 static void MAIN_Key_MENU(const bool bKeyPressed, const bool bKeyHeld)
 {
+	if (bKeyPressed && !bKeyHeld)
+		// menu key pressed
+		gBeepToPlay = BEEP_1KHZ_60MS_OPTIONAL;
+
 	if (bKeyHeld)
 	{	// menu key held down (long press)

 		if (bKeyPressed)
-		{
+		{	// long press MENU key
+
+			gWasFKeyPressed = false;
+
 			if (gScreenToDisplay == DISPLAY_MAIN)
 			{
 				if (gInputBoxIndex > 0)
@@ -544,54 +571,51 @@ static void MAIN_Key_MENU(const bool bKeyPressed, const bool bKeyHeld)
 				gWasFKeyPressed = false;
 				gUpdateStatus   = true;

-
-
-				// TODO: long press M-key
-
-
-
 				#ifdef ENABLE_COPY_CHAN_TO_VFO
-				{	// copy channel to VFO
-					int channel  = -1;
-					int vfo      = -1;
-					//int selected = -1;

-					if (IS_FREQ_CHANNEL(gRxVfo->CHANNEL_SAVE))
-					{	// VFO mode
-						if (IS_MR_CHANNEL(gTxVfo->CHANNEL_SAVE))
-						{	// other VFO is in channel mode
-							channel = gTxVfo->CHANNEL_SAVE;
-							vfo     = gRxVfo->CHANNEL_SAVE;
+					if (gEeprom.VFO_OPEN && gCssScanMode == CSS_SCAN_MODE_OFF)
+					{
+
+						if (gScanStateDir != SCAN_OFF)
+						{
+							if (gCurrentFunction != FUNCTION_INCOMING ||
+							    gRxReceptionMode == RX_MODE_NONE      ||
+								gScanPauseDelayIn_10ms == 0)
+							{	// scan is running (not paused)
+								return;
+							}
+						}
+						
+						const unsigned int vfo = get_rx_VFO();
+
+						if (IS_MR_CHANNEL(gEeprom.ScreenChannel[vfo]))
+						{	// copy channel to VFO, then swap to the VFO
+							
+							const unsigned int channel = FREQ_CHANNEL_FIRST + gEeprom.VfoInfo[vfo].Band;
+
+							gEeprom.ScreenChannel[vfo] = channel;
+							gEeprom.VfoInfo[vfo].CHANNEL_SAVE = channel;
+							gEeprom.TX_VFO = vfo;
+
+							RADIO_SelectVfos();
+							RADIO_ApplyOffset(gRxVfo);
+							RADIO_ConfigureSquelchAndOutputPower(gRxVfo);
+							RADIO_SetupRegisters(true);
+
+							//SETTINGS_SaveChannel(channel, gEeprom.RX_VFO, gRxVfo, 1);
+
+							gBeepToPlay = BEEP_1KHZ_60MS_OPTIONAL;
+
+							gUpdateStatus  = true;
+							gUpdateDisplay = true;
 						}
 					}
 					else
-					if (IS_FREQ_CHANNEL(gTxVfo->CHANNEL_SAVE))
-					{	// VFO mode
-						if (IS_MR_CHANNEL(gRxVfo->CHANNEL_SAVE))
-						{	// other VFO is in channel mode
-							channel = gRxVfo->CHANNEL_SAVE;
-							vfo     = gTxVfo->CHANNEL_SAVE;
-						}
+					{
+						gBeepToPlay = BEEP_500HZ_60MS_DOUBLE_BEEP_OPTIONAL;
 					}

-					if (channel >= 0 && vfo >= 0)
-					{	// copy the channel into the VFO
-
-						gBeepToPlay = BEEP_1KHZ_60MS_OPTIONAL;
-
-
-						// TODO: finish this
-
-						//gEeprom.RX_CHANNEL = () & 1;   // swap to the VFO
-
-
-//						gRequestSaveVFO       = true;
-//						gVfoConfigureMode     = VFO_CONFIGURE_RELOAD;
-//						gRequestDisplayScreen = DISPLAY_MAIN;
-					}
-				}
 				#endif
-
 			}
 		}

@@ -603,14 +627,10 @@ static void MAIN_Key_MENU(const bool bKeyPressed, const bool bKeyHeld)
 		const bool bFlag = (gInputBoxIndex == 0);
 		gInputBoxIndex   = 0;

-		gBeepToPlay = BEEP_1KHZ_60MS_OPTIONAL;
-		
 		if (bFlag)
 		{
 			gFlagRefreshSetting = true;
-
 			gRequestDisplayScreen = DISPLAY_MENU;
-
 			#ifdef ENABLE_VOICE
 				gAnotherVoiceID   = VOICE_ID_MENU;
 			#endif
@@ -624,6 +644,9 @@ static void MAIN_Key_MENU(const bool bKeyPressed, const bool bKeyHeld)

 static void MAIN_Key_STAR(bool bKeyPressed, bool bKeyHeld)
 {
+	if (gCurrentFunction == FUNCTION_TRANSMIT)
+		return;
+	
 	if (gInputBoxIndex)
 	{
 		if (!bKeyHeld && bKeyPressed)
@@ -631,73 +654,72 @@ static void MAIN_Key_STAR(bool bKeyPressed, bool bKeyHeld)
 		return;
 	}

-	if (bKeyHeld || !bKeyPressed)
-	{
-		if (bKeyHeld || bKeyPressed)
-		{
-			if (!bKeyHeld)
-				return;
+	if (bKeyHeld && !gWasFKeyPressed)
+	{	// long press .. toggle scanning
+		if (!bKeyPressed)
+			return; // released

-			if (!bKeyPressed)
-				return;
+		ACTION_Scan(false);

-			ACTION_Scan(false);
-			return;
-		}
+		gBeepToPlay = BEEP_1KHZ_60MS_OPTIONAL;
+		return;
+	}
+
+	if (bKeyPressed)
+	{	// just pressed
+//		gBeepToPlay = BEEP_1KHZ_60MS_OPTIONAL;
+		gBeepToPlay = BEEP_880HZ_40MS_OPTIONAL;
+		return;
+	}
+	
+	// just released
+	
+	if (!gWasFKeyPressed)
+	{	// pressed without the F-key

 		#ifdef ENABLE_NOAA
-			if (gScanState == SCAN_OFF && IS_NOT_NOAA_CHANNEL(gTxVfo->CHANNEL_SAVE))
+			if (gScanStateDir == SCAN_OFF && IS_NOT_NOAA_CHANNEL(gTxVfo->CHANNEL_SAVE))
 		#else
-			if (gScanState == SCAN_OFF)
+			if (gScanStateDir == SCAN_OFF)
 		#endif
-		{
-			gKeyInputCountdown    = key_input_timeout_500ms;
+		{	// start entering a DTMF string
+
+			memmove(gDTMF_InputBox, gDTMF_String, MIN(sizeof(gDTMF_InputBox), sizeof(gDTMF_String) - 1));
+			gDTMF_InputBox_Index  = 0;
 			gDTMF_InputMode       = true;
-			memmove(gDTMF_InputBox, gDTMF_String, sizeof(gDTMF_InputBox));
-			gDTMF_InputIndex      = 0;
+
+			gKeyInputCountdown    = key_input_timeout_500ms;

 			gRequestDisplayScreen = DISPLAY_MAIN;
-			return;
 		}
 	}
 	else
-	{
-		gBeepToPlay = BEEP_1KHZ_60MS_OPTIONAL;
-		if (!gWasFKeyPressed)
-		{
-			gBeepToPlay = BEEP_1KHZ_60MS_OPTIONAL;
-			return;
-		}
-
+	{	// with the F-key
 		gWasFKeyPressed = false;
-		gUpdateStatus   = true;

 		#ifdef ENABLE_NOAA
-			if (IS_NOT_NOAA_CHANNEL(gTxVfo->CHANNEL_SAVE))
-			{
-				gFlagStartScan           = true;
-				gScanSingleFrequency     = true;
-				gBackupCROSS_BAND_RX_TX  = gEeprom.CROSS_BAND_RX_TX;
-				gEeprom.CROSS_BAND_RX_TX = CROSS_BAND_OFF;
-			}
-			else
+			if (IS_NOAA_CHANNEL(gTxVfo->CHANNEL_SAVE))
 			{
 				gBeepToPlay = BEEP_500HZ_60MS_DOUBLE_BEEP_OPTIONAL;
+				return;
 			}				
-		#else
-			gFlagStartScan           = true;
-			gScanSingleFrequency     = true;
-			gBackupCROSS_BAND_RX_TX  = gEeprom.CROSS_BAND_RX_TX;
-			gEeprom.CROSS_BAND_RX_TX = CROSS_BAND_OFF;
 		#endif

-		gPttWasReleased = true;
+		// scan the CTCSS/DCS code
+		gFlagStartScan           = true;
+		gScanSingleFrequency     = true;
+		gBackup_CROSS_BAND_RX_TX  = gEeprom.CROSS_BAND_RX_TX;
+		gEeprom.CROSS_BAND_RX_TX = CROSS_BAND_OFF;
 	}
+	
+	gPttWasReleased = true;
+
+	gUpdateStatus   = true;
 }

 static void MAIN_Key_UP_DOWN(bool bKeyPressed, bool bKeyHeld, int8_t Direction)
 {
-	uint8_t Channel = gEeprom.ScreenChannel[gEeprom.TX_CHANNEL];
+	uint8_t Channel = gEeprom.ScreenChannel[gEeprom.TX_VFO];

 	if (bKeyHeld || !bKeyPressed)
 	{
@@ -731,7 +753,7 @@ static void MAIN_Key_UP_DOWN(bool bKeyPressed, bool bKeyHeld, int8_t Direction)
 		gBeepToPlay = BEEP_1KHZ_60MS_OPTIONAL;
 	}

-	if (gScanState == SCAN_OFF)
+	if (gScanStateDir == SCAN_OFF)
 	{
 		#ifdef ENABLE_NOAA
 			if (IS_NOT_NOAA_CHANNEL(Channel))
@@ -762,8 +784,8 @@ static void MAIN_Key_UP_DOWN(bool bKeyPressed, bool bKeyHeld, int8_t Direction)
 			if (Channel == Next)
 				return;

-			gEeprom.MrChannel[gEeprom.TX_CHANNEL]     = Next;
-			gEeprom.ScreenChannel[gEeprom.TX_CHANNEL] = Next;
+			gEeprom.MrChannel[gEeprom.TX_VFO]     = Next;
+			gEeprom.ScreenChannel[gEeprom.TX_VFO] = Next;

 			if (!bKeyHeld)
 			{
@@ -776,9 +798,9 @@ static void MAIN_Key_UP_DOWN(bool bKeyPressed, bool bKeyHeld, int8_t Direction)
 		#ifdef ENABLE_NOAA
 			else
 			{
-				Channel = NOAA_CHANNEL_FIRST + NUMBER_AddWithWraparound(gEeprom.ScreenChannel[gEeprom.TX_CHANNEL] - NOAA_CHANNEL_FIRST, Direction, 0, 9);
-				gEeprom.NoaaChannel[gEeprom.TX_CHANNEL]   = Channel;
-				gEeprom.ScreenChannel[gEeprom.TX_CHANNEL] = Channel;
+				Channel = NOAA_CHANNEL_FIRST + NUMBER_AddWithWraparound(gEeprom.ScreenChannel[gEeprom.TX_VFO] - NOAA_CHANNEL_FIRST, Direction, 0, 9);
+				gEeprom.NoaaChannel[gEeprom.TX_VFO]   = Channel;
+				gEeprom.ScreenChannel[gEeprom.TX_VFO] = Channel;
 			}
 		#endif

@@ -787,7 +809,10 @@ static void MAIN_Key_UP_DOWN(bool bKeyPressed, bool bKeyHeld, int8_t Direction)
 		return;
 	}

+	// jump to the next channel
 	CHANNEL_Next(false, Direction);
+	gScanPauseDelayIn_10ms = 1;
+	gScheduleScanListen    = false;

 	gPttWasReleased = true;
 }
@@ -803,31 +828,25 @@ void MAIN_ProcessKeys(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 		}
 	#endif

-	if (gDTMF_InputMode && bKeyPressed)
+	if (gDTMF_InputMode && bKeyPressed && !bKeyHeld)
 	{
-		if (!bKeyHeld)
-		{
-			const char Character = DTMF_GetCharacter(Key);
-			if (Character != 0xFF)
-			{	// add key to DTMF string
-				DTMF_Append(Character);
-
-				gKeyInputCountdown    = key_input_timeout_500ms;
-
-				gRequestDisplayScreen = DISPLAY_MAIN;
-
-				gPttWasReleased       = true;
-				gBeepToPlay           = BEEP_1KHZ_60MS_OPTIONAL;
-				return;
-			}
+		const char Character = DTMF_GetCharacter(Key);
+		if (Character != 0xFF)
+		{	// add key to DTMF string
+			DTMF_Append(Character);
+			gKeyInputCountdown    = key_input_timeout_500ms;
+			gRequestDisplayScreen = DISPLAY_MAIN;
+			gPttWasReleased       = true;
+			gBeepToPlay           = BEEP_1KHZ_60MS_OPTIONAL;
+			return;
 		}
 	}

 	// TODO: ???
-	if (Key > KEY_PTT)
-	{
-		Key = KEY_SIDE2;
-	}
+//	if (Key > KEY_PTT)
+//	{
+//		Key = KEY_SIDE2;      // what's this doing ???
+//	}

 	switch (Key)
 	{
--- a/app/menu.c
+++ b/app/menu.c
@@ -47,26 +47,33 @@
 	#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
 #endif

-void writeXtalFreqCal(const int32_t value)
-{
-	struct
+#ifdef ENABLE_F_CAL_MENU
+	void writeXtalFreqCal(const int32_t value, const bool update_eeprom)
 	{
-		int16_t  BK4819_XtalFreqLow;
-		uint16_t EEPROM_1F8A;
-		uint16_t EEPROM_1F8C;
-		uint8_t  VOLUME_GAIN;
-		uint8_t  DAC_GAIN;
-	} __attribute__((packed)) Misc;
+		BK4819_WriteRegister(BK4819_REG_3B, 22656 + value);

-	gEeprom.BK4819_XTAL_FREQ_LOW = value;
-	BK4819_WriteRegister(BK4819_REG_3B, 22656 + gEeprom.BK4819_XTAL_FREQ_LOW);
+		if (update_eeprom)
+		{
+			struct
+			{
+				int16_t  BK4819_XtalFreqLow;
+				uint16_t EEPROM_1F8A;
+				uint16_t EEPROM_1F8C;
+				uint8_t  VOLUME_GAIN;
+				uint8_t  DAC_GAIN;
+			} __attribute__((packed)) misc;

-	// radio 1 .. 04 00 46 00 50 00 2C 0E
-	// radio 2 .. 05 00 46 00 50 00 2C 0E
-	EEPROM_ReadBuffer(0x1F88, &Misc, 8);
-	Misc.BK4819_XtalFreqLow = gEeprom.BK4819_XTAL_FREQ_LOW;
-	EEPROM_WriteBuffer(0x1F88, &Misc);
-}
+			gEeprom.BK4819_XTAL_FREQ_LOW = value;
+
+			// radio 1 .. 04 00 46 00 50 00 2C 0E
+			// radio 2 .. 05 00 46 00 50 00 2C 0E
+			//
+			EEPROM_ReadBuffer(0x1F88, &misc, 8);
+			misc.BK4819_XtalFreqLow = value;
+			EEPROM_WriteBuffer(0x1F88, &misc);
+		}
+	}
+#endif

 void MENU_StartCssScan(int8_t Direction)
 {
@@ -79,8 +86,8 @@ void MENU_StartCssScan(int8_t Direction)

 	MENU_SelectNextCode();

-	ScanPauseDelayIn_10ms = scan_pause_delay_in_2_10ms;
-	gScheduleScanListen   = false;
+	gScanPauseDelayIn_10ms = scan_pause_delay_in_2_10ms;
+	gScheduleScanListen    = false;
 }

 void MENU_StopCssScan(void)
@@ -192,12 +199,11 @@ int MENU_GetLimits(uint8_t Cursor, int32_t *pMin, int32_t *pMax)
 			*pMax = ARRAY_SIZE(gSubMenu_RESET) - 1;
 			break;

-		#ifdef ENABLE_COMPANDER
-			case MENU_COMPAND:
-				*pMin = 0;
-				*pMax = ARRAY_SIZE(gSubMenu_Compand) - 1;
-				break;
-		#endif
+		case MENU_COMPAND:
+		case MENU_ABR_ON_TX_RX:
+			*pMin = 0;
+			*pMax = ARRAY_SIZE(gSubMenu_RX_TX) - 1;
+			break;

 		#ifdef ENABLE_AM_FIX_TEST1
 			case MENU_AM_FIX_TEST1:
@@ -212,7 +218,6 @@ int MENU_GetLimits(uint8_t Cursor, int32_t *pMin, int32_t *pMax)
 		#ifdef ENABLE_AUDIO_BAR
 			case MENU_MIC_BAR:
 		#endif
-		case MENU_ABR_ON_RX:
 		case MENU_BCL:
 		case MENU_BEEP:
 		case MENU_AUTOLK:
@@ -246,7 +251,9 @@ int MENU_GetLimits(uint8_t Cursor, int32_t *pMin, int32_t *pMax)
 			*pMax = ARRAY_SIZE(gSubMenu_TOT) - 1;
 			break;

-		case MENU_VOX:
+		#ifdef ENABLE_VOX
+			case MENU_VOX:
+		#endif
 		case MENU_RP_STE:
 			*pMin = 0;
 			*pMax = 10;
@@ -277,7 +284,8 @@ int MENU_GetLimits(uint8_t Cursor, int32_t *pMin, int32_t *pMax)
 			break;

 		case MENU_S_LIST:
-			*pMin = 1;
+			*pMin = 0;
+//			*pMax = 1;
 			*pMax = 2;
 			break;

@@ -291,11 +299,6 @@ int MENU_GetLimits(uint8_t Cursor, int32_t *pMin, int32_t *pMax)
 			*pMax = ARRAY_SIZE(gSubMenu_PTT_ID) - 1;
 			break;

-		case MENU_VOL:
-			*pMin = 0;
-			*pMax = 2300;
-			break;
-
 		case MENU_BAT_TXT:
 			*pMin = 0;
 			*pMax = ARRAY_SIZE(gSubMenu_BAT_TXT) - 1;
@@ -405,6 +408,9 @@ void MENU_AcceptSetting(void)
 			gRequestSaveChannel = 1;
 			return;

+		#pragma GCC diagnostic push
+		#pragma GCC diagnostic ignored "-Wimplicit-fallthrough="
+
 		case MENU_T_CTCS:
 			pConfig = &gTxVfo->freq_config_TX;
 		case MENU_R_CTCS:
@@ -433,6 +439,8 @@ void MENU_AcceptSetting(void)
 			gRequestSaveChannel = 1;
 			return;

+		#pragma GCC diagnostic pop
+
 		case MENU_SFT_D:
 			gTxVfo->TX_OFFSET_FREQUENCY_DIRECTION = gSubMenuSelection;
 			gRequestSaveChannel                   = 1;
@@ -469,7 +477,7 @@ void MENU_AcceptSetting(void)
 			#if 0
 				gEeprom.MrChannel[0] = gSubMenuSelection;
 			#else
-				gEeprom.MrChannel[gEeprom.TX_CHANNEL] = gSubMenuSelection;
+				gEeprom.MrChannel[gEeprom.TX_VFO] = gSubMenuSelection;
 			#endif
 			gRequestSaveChannel = 2;
 			gVfoConfigureMode   = VFO_CONFIGURE_RELOAD;
@@ -489,7 +497,7 @@ void MENU_AcceptSetting(void)
 			// save the channel name
 			memset(gTxVfo->Name, 0, sizeof(gTxVfo->Name));
 			memmove(gTxVfo->Name, edit, 10);
-			SETTINGS_SaveChannel(gSubMenuSelection, gEeprom.TX_CHANNEL, gTxVfo, 3);
+			SETTINGS_SaveChannel(gSubMenuSelection, gEeprom.TX_VFO, gTxVfo, 3);
 			gFlagReconfigureVfos = true;
 			return;

@@ -497,21 +505,23 @@ void MENU_AcceptSetting(void)
 			gEeprom.BATTERY_SAVE = gSubMenuSelection;
 			break;

-		case MENU_VOX:
-			gEeprom.VOX_SWITCH = gSubMenuSelection != 0;
-			if (gEeprom.VOX_SWITCH)
-				gEeprom.VOX_LEVEL = gSubMenuSelection - 1;
-			BOARD_EEPROM_LoadMoreSettings();
-			gFlagReconfigureVfos = true;
-			gUpdateStatus        = true;
-			break;
+		#ifdef ENABLE_VOX
+			case MENU_VOX:
+				gEeprom.VOX_SWITCH = gSubMenuSelection != 0;
+				if (gEeprom.VOX_SWITCH)
+					gEeprom.VOX_LEVEL = gSubMenuSelection - 1;
+				BOARD_EEPROM_LoadMoreSettings();
+				gFlagReconfigureVfos = true;
+				gUpdateStatus        = true;
+				break;
+		#endif

 		case MENU_ABR:
 			gEeprom.BACKLIGHT = gSubMenuSelection;
 			break;

-		case MENU_ABR_ON_RX:
-			gSetting_backlight_on_rx = gSubMenuSelection;
+		case MENU_ABR_ON_TX_RX:
+			gSetting_backlight_on_tx_rx = gSubMenuSelection;
 			break;

 		case MENU_TDR:
@@ -595,22 +605,20 @@ void MENU_AcceptSetting(void)
 				break;
 		#endif

-		#ifdef ENABLE_COMPANDER
-			case MENU_COMPAND:
-				gTxVfo->Compander = gSubMenuSelection;
-				SETTINGS_UpdateChannel(gTxVfo->CHANNEL_SAVE, gTxVfo, true);
-				gVfoConfigureMode = VFO_CONFIGURE;
-				gFlagResetVfos    = true;
-//				gRequestSaveChannel = 1;
-				return;
-		#endif
+		case MENU_COMPAND:
+			gTxVfo->Compander = gSubMenuSelection;
+			SETTINGS_UpdateChannel(gTxVfo->CHANNEL_SAVE, gTxVfo, true);
+			gVfoConfigureMode = VFO_CONFIGURE;
+			gFlagResetVfos    = true;
+//			gRequestSaveChannel = 1;
+			return;

 		case MENU_1_CALL:
 			gEeprom.CHAN_1_CALL = gSubMenuSelection;
 			break;

 		case MENU_S_LIST:
-			gEeprom.SCAN_LIST_DEFAULT = gSubMenuSelection - 1;
+			gEeprom.SCAN_LIST_DEFAULT = gSubMenuSelection;
 			break;

 		#ifdef ENABLE_ALARM
@@ -628,7 +636,7 @@ void MENU_AcceptSetting(void)
 			break;

 		case MENU_D_HOLD:
-			gEeprom.DTMF_AUTO_RESET_TIME = gSubMenuSelection;
+			gEeprom.DTMF_auto_reset_time = gSubMenuSelection;
 			break;

 		case MENU_D_PRE:
@@ -640,12 +648,6 @@ void MENU_AcceptSetting(void)
 			gRequestSaveChannel         = 1;
 			return;

-		case MENU_VOL:
-			if(gF_LOCK) {
-				EEPROM_WriteBuffer(0x1F40, gBatteryCalibration);
-			}
-			break;
-
 		case MENU_BAT_TXT:
 			gSetting_battery_text = gSubMenuSelection;
 			break;
@@ -667,12 +669,12 @@ void MENU_AcceptSetting(void)
 			break;

 		case MENU_D_LIST:
-			gDTMFChosenContact = gSubMenuSelection - 1;
+			gDTMF_chosen_contact = gSubMenuSelection - 1;
 			if (gIsDtmfContactValid)
 			{
 				GUI_SelectNextDisplay(DISPLAY_MAIN);
 				gDTMF_InputMode       = true;
-				gDTMF_InputIndex      = 3;
+				gDTMF_InputBox_Index  = 3;
 				memmove(gDTMF_InputBox, gDTMF_ID, 4);
 				gRequestDisplayScreen = DISPLAY_INVALID;
 			}
@@ -757,14 +759,29 @@ void MENU_AcceptSetting(void)

 		#ifdef ENABLE_F_CAL_MENU
 			case MENU_F_CALI:
-				writeXtalFreqCal(gSubMenuSelection);
+				writeXtalFreqCal(gSubMenuSelection, true);
 				return;
 		#endif

 		case MENU_BATCAL:
-			gBatteryCalibration[3] = gSubMenuSelection;
+		{
+			uint16_t buf[4];
+
+			gBatteryCalibration[0] = (520ul * gSubMenuSelection) / 760;  // 5.20V empty, blinking above this value, reduced functionality below
+			gBatteryCalibration[1] = (700ul * gSubMenuSelection) / 760;  // 7.00V,  ~5%, 1 bars above this value
+			gBatteryCalibration[2] = (745ul * gSubMenuSelection) / 760;  // 7.45V, ~17%, 2 bars above this value
+			gBatteryCalibration[3] =          gSubMenuSelection;         // 7.6V,  ~29%, 3 bars above this value
+			gBatteryCalibration[4] = (788ul * gSubMenuSelection) / 760;  // 7.88V, ~65%, 4 bars above this value
+			gBatteryCalibration[5] = 2300;
 			EEPROM_WriteBuffer(0x1F40, gBatteryCalibration);
+
+			EEPROM_ReadBuffer( 0x1F48, buf, sizeof(buf));
+			buf[0] = gBatteryCalibration[4];
+			buf[1] = gBatteryCalibration[5];
+			EEPROM_WriteBuffer(0x1F48, buf);
+
 			break;
+		}
 	}

 	gRequestSaveSettings = true;
@@ -807,7 +824,7 @@ void MENU_SelectNextCode(void)

 	RADIO_SetupRegisters(true);

-	ScanPauseDelayIn_10ms = (gSelectedCodeType == CODE_TYPE_CONTINUOUS_TONE) ? scan_pause_delay_in_3_10ms : scan_pause_delay_in_4_10ms;
+	gScanPauseDelayIn_10ms = (gSelectedCodeType == CODE_TYPE_CONTINUOUS_TONE) ? scan_pause_delay_in_3_10ms : scan_pause_delay_in_4_10ms;

 	gUpdateDisplay = true;
 }
@@ -909,21 +926,23 @@ void MENU_ShowCurrentSetting(void)
 			#if 0
 				gSubMenuSelection = gEeprom.MrChannel[0];
 			#else
-				gSubMenuSelection = gEeprom.MrChannel[gEeprom.TX_CHANNEL];
+				gSubMenuSelection = gEeprom.MrChannel[gEeprom.TX_VFO];
 			#endif
 			break;

 		case MENU_MEM_NAME:
-			gSubMenuSelection = gEeprom.MrChannel[gEeprom.TX_CHANNEL];
+			gSubMenuSelection = gEeprom.MrChannel[gEeprom.TX_VFO];
 			break;

 		case MENU_SAVE:
 			gSubMenuSelection = gEeprom.BATTERY_SAVE;
 			break;

-		case MENU_VOX:
-			gSubMenuSelection = gEeprom.VOX_SWITCH ? gEeprom.VOX_LEVEL + 1 : 0;
-			break;
+		#ifdef ENABLE_VOX
+			case MENU_VOX:
+				gSubMenuSelection = gEeprom.VOX_SWITCH ? gEeprom.VOX_LEVEL + 1 : 0;
+				break;
+		#endif

 		case MENU_ABR:
 			gSubMenuSelection = gEeprom.BACKLIGHT;
@@ -932,8 +951,8 @@ void MENU_ShowCurrentSetting(void)
 			GPIO_SetBit(&GPIOB->DATA, GPIOB_PIN_BACKLIGHT);  	// turn the backlight ON while in backlight menu
 			break;

-		case MENU_ABR_ON_RX:
-			gSubMenuSelection = gSetting_backlight_on_rx;
+		case MENU_ABR_ON_TX_RX:
+			gSubMenuSelection = gSetting_backlight_on_tx_rx;
 			break;

 		case MENU_TDR:
@@ -996,18 +1015,16 @@ void MENU_ShowCurrentSetting(void)
 				break;
 		#endif

-		#ifdef ENABLE_COMPANDER
-			case MENU_COMPAND:
-				gSubMenuSelection = gTxVfo->Compander;
-				return;
-		#endif
+		case MENU_COMPAND:
+			gSubMenuSelection = gTxVfo->Compander;
+			return;

 		case MENU_1_CALL:
 			gSubMenuSelection = gEeprom.CHAN_1_CALL;
 			break;

 		case MENU_S_LIST:
-			gSubMenuSelection = gEeprom.SCAN_LIST_DEFAULT + 1;
+			gSubMenuSelection = gEeprom.SCAN_LIST_DEFAULT;
 			break;

 		case MENU_SLIST1:
@@ -1033,7 +1050,7 @@ void MENU_ShowCurrentSetting(void)
 			break;

 		case MENU_D_HOLD:
-			gSubMenuSelection = gEeprom.DTMF_AUTO_RESET_TIME;
+			gSubMenuSelection = gEeprom.DTMF_auto_reset_time;
 			break;

 		case MENU_D_PRE:
@@ -1044,10 +1061,6 @@ void MENU_ShowCurrentSetting(void)
 			gSubMenuSelection = gTxVfo->DTMF_PTT_ID_TX_MODE;
 			break;

-		case MENU_VOL:
-			gSubMenuSelection = gBatteryCalibration[3];
-			return;
-
 		case MENU_BAT_TXT:
 			gSubMenuSelection = gSetting_battery_text;
 			return;
@@ -1057,7 +1070,7 @@ void MENU_ShowCurrentSetting(void)
 			break;

 		case MENU_D_LIST:
-			gSubMenuSelection = gDTMFChosenContact + 1;
+			gSubMenuSelection = gDTMF_chosen_contact + 1;
 			break;

 		case MENU_D_LIVE_DEC:
@@ -1098,7 +1111,7 @@ void MENU_ShowCurrentSetting(void)
 			#if 0
 				gSubMenuSelection = RADIO_FindNextChannel(gEeprom.MrChannel[0], 1, false, 1);
 			#else
-				gSubMenuSelection = RADIO_FindNextChannel(gEeprom.MrChannel[gEeprom.TX_CHANNEL], 1, false, 1);
+				gSubMenuSelection = RADIO_FindNextChannel(gEeprom.MrChannel[gEeprom.TX_VFO], 1, false, 1);
 			#endif
 			break;

@@ -1185,6 +1198,9 @@ static void MENU_Key_0_to_9(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)

 	if (!gIsInSubMenu)
 	{
+		#pragma GCC diagnostic push
+		#pragma GCC diagnostic ignored "-Wimplicit-fallthrough="
+
 		switch (gInputBoxIndex)
 		{
 			case 2:
@@ -1216,6 +1232,8 @@ static void MENU_Key_0_to_9(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 				break;
 		}

+		#pragma GCC diagnostic pop
+
 		gInputBoxIndex = 0;

 		gBeepToPlay = BEEP_500HZ_60MS_DOUBLE_BEEP_OPTIONAL;
@@ -1261,7 +1279,7 @@ static void MENU_Key_0_to_9(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)

 		Value = ((gInputBox[0] * 100) + (gInputBox[1] * 10) + gInputBox[2]) - 1;

-		if (IS_MR_CHANNEL(Value))
+		if (Value <= MR_CHANNEL_LAST)
 		{
 			#ifdef ENABLE_VOICE
 				gAnotherVoiceID = (VOICE_ID_t)Key;
@@ -1653,6 +1671,9 @@ static void MENU_Key_UP_DOWN(bool bKeyPressed, bool bKeyHeld, int8_t Direction)

 	VFO = 0;

+	#pragma GCC diagnostic push
+	#pragma GCC diagnostic ignored "-Wimplicit-fallthrough="
+
 	switch (gMenuCursor)
 	{
 		case MENU_DEL_CH:
@@ -1673,6 +1694,8 @@ static void MENU_Key_UP_DOWN(bool bKeyPressed, bool bKeyHeld, int8_t Direction)
 			return;
 	}

+	#pragma GCC diagnostic pop
+
 	Channel = RADIO_FindNextChannel(gSubMenuSelection + Direction, Direction, bCheckScanList, VFO);
 	if (Channel != 0xFF)
 		gSubMenuSelection = Channel;
--- a/app/menu.h
+++ b/app/menu.h
@@ -19,6 +19,10 @@

 #include "driver/keyboard.h"

+#ifdef ENABLE_F_CAL_MENU
+	void writeXtalFreqCal(const int32_t value, const bool update_eeprom);
+#endif
+
 int MENU_GetLimits(uint8_t Cursor, int32_t *pMin, int32_t *pMax);
 void MENU_AcceptSetting(void);
 void MENU_SelectNextCode(void);
--- a/app/scanner.c
+++ b/app/scanner.c
@@ -37,11 +37,11 @@ uint32_t          gScanFrequency;
 bool              gScanPauseMode;
 SCAN_CssState_t   gScanCssState;
 volatile bool     gScheduleScanListen = true;
-volatile uint16_t ScanPauseDelayIn_10ms;
+volatile uint16_t gScanPauseDelayIn_10ms;
 uint8_t           gScanProgressIndicator;
 uint8_t           gScanHitCount;
 bool              gScanUseCssResult;
-int8_t            gScanState;
+int8_t            gScanStateDir;
 bool              bScanKeepFrequency;

 static void SCANNER_Key_DIGITS(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
@@ -53,7 +53,9 @@ static void SCANNER_Key_DIGITS(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 			uint16_t Channel;

 			gBeepToPlay = BEEP_1KHZ_60MS_OPTIONAL;
+
 			INPUTBOX_Append(Key);
+
 			gRequestDisplayScreen = DISPLAY_SCANNER;

 			if (gInputBoxIndex < 3)
@@ -65,9 +67,9 @@ static void SCANNER_Key_DIGITS(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld)
 			}

 			gInputBoxIndex = 0;
-			Channel        = ((gInputBox[0] * 100) + (gInputBox[1] * 10) + gInputBox[2]) - 1;

-			if (IS_MR_CHANNEL(Channel))
+			Channel = ((gInputBox[0] * 100) + (gInputBox[1] * 10) + gInputBox[2]) - 1;
+			if (Channel <= MR_CHANNEL_LAST)
 			{
 				#ifdef ENABLE_VOICE
 					gAnotherVoiceID = (VOICE_ID_t)Key;
@@ -93,7 +95,7 @@ static void SCANNER_Key_EXIT(bool bKeyPressed, bool bKeyHeld)
 			case 0:
 				gRequestDisplayScreen    = DISPLAY_MAIN;
 				
-				gEeprom.CROSS_BAND_RX_TX = gBackupCROSS_BAND_RX_TX;
+				gEeprom.CROSS_BAND_RX_TX = gBackup_CROSS_BAND_RX_TX;
 				gUpdateStatus            = true;
 				gFlagStopScan            = true;
 				gVfoConfigureMode        = VFO_CONFIGURE_RELOAD;
@@ -193,7 +195,7 @@ static void SCANNER_Key_MENU(bool bKeyPressed, bool bKeyHeld)
 				}
 			}

-			if (IS_MR_CHANNEL(gTxVfo->CHANNEL_SAVE))
+			if (gTxVfo->CHANNEL_SAVE <= MR_CHANNEL_LAST)
 			{
 				gScannerEditState = 1;
 				gScanChannel      = gTxVfo->CHANNEL_SAVE;
@@ -247,19 +249,19 @@ static void SCANNER_Key_MENU(bool bKeyPressed, bool bKeyHeld)
 				gTxVfo->freq_config_TX.Code     = gScanCssResultCode;
 			}

-			if (IS_MR_CHANNEL(gTxVfo->CHANNEL_SAVE))
+			if (gTxVfo->CHANNEL_SAVE <= MR_CHANNEL_LAST)
 			{
 				Channel                               = gScanChannel;
-				gEeprom.MrChannel[gEeprom.TX_CHANNEL] = Channel;
+				gEeprom.MrChannel[gEeprom.TX_VFO] = Channel;
 			}
 			else
 			{
 				Channel                                 = gTxVfo->Band + FREQ_CHANNEL_FIRST;
-				gEeprom.FreqChannel[gEeprom.TX_CHANNEL] = Channel;
+				gEeprom.FreqChannel[gEeprom.TX_VFO] = Channel;
 			}

 			gTxVfo->CHANNEL_SAVE                      = Channel;
-			gEeprom.ScreenChannel[gEeprom.TX_CHANNEL] = Channel;
+			gEeprom.ScreenChannel[gEeprom.TX_VFO] = Channel;
 			#ifdef ENABLE_VOICE
 				gAnotherVoiceID                       = VOICE_ID_CONFIRM;
 			#endif
@@ -412,7 +414,9 @@ void SCANNER_Start(void)
 	g_CDCSS_Lost           = false;
 	gCDCSSCodeType         = 0;
 	g_CTCSS_Lost           = false;
-	g_VOX_Lost             = false;
+	#ifdef ENABLE_VOX
+		g_VOX_Lost         = false;
+	#endif
 	g_SquelchLost          = false;
 	gScannerEditState      = 0;
 	gScanProgressIndicator = 0;
@@ -422,16 +426,16 @@ void SCANNER_Stop(void)
 {
 	const uint8_t Previous = gRestoreMrChannel;

-	gScanState = SCAN_OFF;
+	gScanStateDir = SCAN_OFF;

 	if (!bScanKeepFrequency)
 	{
-		if (IS_MR_CHANNEL(gNextMrChannel))
+		if (gNextMrChannel <= MR_CHANNEL_LAST)
 		{
-			gEeprom.MrChannel[gEeprom.RX_CHANNEL]     = gRestoreMrChannel;
-			gEeprom.ScreenChannel[gEeprom.RX_CHANNEL] = Previous;
+			gEeprom.MrChannel[gEeprom.RX_VFO]     = gRestoreMrChannel;
+			gEeprom.ScreenChannel[gEeprom.RX_VFO] = Previous;

-			RADIO_ConfigureChannel(gEeprom.RX_CHANNEL, VFO_CONFIGURE_RELOAD);
+			RADIO_ConfigureChannel(gEeprom.RX_VFO, VFO_CONFIGURE_RELOAD);
 		}
 		else
 		{
@@ -444,11 +448,11 @@ void SCANNER_Stop(void)
 		return;
 	}

-	if (!IS_MR_CHANNEL(gRxVfo->CHANNEL_SAVE))
+	if (gRxVfo->CHANNEL_SAVE > MR_CHANNEL_LAST)
 	{
 		RADIO_ApplyOffset(gRxVfo);
 		RADIO_ConfigureSquelchAndOutputPower(gRxVfo);
-		SETTINGS_SaveChannel(gRxVfo->CHANNEL_SAVE, gEeprom.RX_CHANNEL, gRxVfo, 1);
+		SETTINGS_SaveChannel(gRxVfo->CHANNEL_SAVE, gEeprom.RX_VFO, gRxVfo, 1);
 		return;
 	}

--- a/app/scanner.h
+++ b/app/scanner.h
@@ -32,7 +32,9 @@ typedef enum SCAN_CssState_t SCAN_CssState_t;

 enum
 {
-	SCAN_OFF = 0,
+	SCAN_REV = -1,
+	SCAN_OFF =  0,
+	SCAN_FWD = +1
 };

 extern DCS_CodeType_t    gScanCssResultType;
@@ -46,11 +48,11 @@ extern uint32_t          gScanFrequency;
 extern bool              gScanPauseMode;
 extern SCAN_CssState_t   gScanCssState;
 extern volatile bool     gScheduleScanListen;
-extern volatile uint16_t ScanPauseDelayIn_10ms;
+extern volatile uint16_t gScanPauseDelayIn_10ms;
 extern uint8_t           gScanProgressIndicator;
 extern uint8_t           gScanHitCount;
 extern bool              gScanUseCssResult;
-extern int8_t            gScanState;
+extern int8_t            gScanStateDir;
 extern bool              bScanKeepFrequency;

 void SCANNER_ProcessKeys(KEY_Code_t Key, bool bKeyPressed, bool bKeyHeld);
--- a/app/spectrum.c
+++ b/app/spectrum.c
@@ -62,17 +62,17 @@ const char *modulationTypeOptions[] = {" FM", " AM", "USB"};
 const uint8_t modulationTypeTuneSteps[] = {100, 50, 10};
 const uint8_t modTypeReg47Values[] = {1, 7, 5};

-SpectrumSettings settings = {STEPS_64,
-                             S_STEP_25_0kHz,
-                             80000,
-                             3200,
-                             150,
-                             true,
-                             BK4819_FILTER_BW_WIDE,
-                             BK4819_FILTER_BW_WIDE,
-                             false,
-                             -130,
-                             -50};
+SpectrumSettings settings = {stepsCount: STEPS_64,
+                             scanStepIndex: S_STEP_25_0kHz,
+                             frequencyChangeStep: 80000,
+                             scanDelay: 3200,
+                             rssiTriggerLevel: 150,
+                             backlightState: true,
+                             bw: BK4819_FILTER_BW_WIDE,
+                             listenBw: BK4819_FILTER_BW_WIDE,
+                             modulationType: false,
+                             dbMin: -130,
+                             dbMax: -50};

 uint32_t fMeasure = 0;
 uint32_t currentFreq, tempFreq;
@@ -561,7 +561,7 @@ static void UpdateFreqInput(KEY_Code_t key) {
  for (int i = 0; i < 10; ++i) {
    if (i < freqInputIndex) {
      digitKey = freqInputArr[i];
-      freqInputString[i] = digitKey <= KEY_9 ? '0' + digitKey : '.';
+      freqInputString[i] = digitKey <= KEY_9 ? '0' + digitKey-KEY_0 : '.';
    } else {
      freqInputString[i] = '-';
    }
@@ -569,14 +569,14 @@ static void UpdateFreqInput(KEY_Code_t key) {

  uint32_t base = 100000; // 1MHz in BK units
  for (int i = dotIndex - 1; i >= 0; --i) {
-    tempFreq += freqInputArr[i] * base;
+    tempFreq += (freqInputArr[i]-KEY_0) * base;
    base *= 10;
  }

  base = 10000; // 0.1MHz in BK units
  if (dotIndex < freqInputIndex) {
    for (int i = dotIndex + 1; i < freqInputIndex; ++i) {
-      tempFreq += freqInputArr[i] * base;
+      tempFreq += (freqInputArr[i]-KEY_0) * base;
      base /= 10;
    }
  }
@@ -1166,7 +1166,7 @@ static void Tick() {
 void APP_RunSpectrum() {
  // TX here coz it always? set to active VFO
  currentFreq = initialFreq =
-      gEeprom.VfoInfo[gEeprom.TX_CHANNEL].pRX->Frequency;
+      gEeprom.VfoInfo[gEeprom.TX_VFO].pRX->Frequency;

  BackupRegisters();

--- a/app/spectrum.h
+++ b/app/spectrum.h
@@ -122,18 +122,17 @@ typedef enum ScanStep {
 } ScanStep;

 typedef struct SpectrumSettings {
+  uint32_t frequencyChangeStep;  
  StepsCount stepsCount;
  ScanStep scanStepIndex;
-  uint32_t frequencyChangeStep;
  uint16_t scanDelay;
  uint16_t rssiTriggerLevel;
-
-  bool backlightState;
  BK4819_FilterBandwidth_t bw;
  BK4819_FilterBandwidth_t listenBw;
-  ModulationType modulationType;
  int dbMin;
  int dbMax;  
+  ModulationType modulationType;
+  bool backlightState;
 } SpectrumSettings;

 typedef struct KeyboardState {
@@ -161,8 +160,8 @@ typedef struct RegisterSpec {
 typedef struct PeakInfo {
  uint16_t t;
  uint16_t rssi;
-  uint8_t i;
  uint32_t f;
+  uint8_t i;
 } PeakInfo;

 void APP_RunSpectrum(void);
--- a/app/uart.c
+++ b/app/uart.c
@@ -48,7 +48,7 @@ typedef struct {
 } Header_t;

 typedef struct {
-	uint8_t Padding[2];
+	uint8_t  Padding[2];
 	uint16_t ID;
 } Footer_t;

@@ -60,10 +60,10 @@ typedef struct {
 typedef struct {
 	Header_t Header;
 	struct {
-		char Version[16];
-		bool bHasCustomAesKey;
-		bool bIsInLockScreen;
-		uint8_t Padding[2];
+		char     Version[16];
+		bool     bHasCustomAesKey;
+		bool     bIsInLockScreen;
+		uint8_t  Padding[2];
 		uint32_t Challenge[4];
 	} Data;
 } REPLY_0514_t;
@@ -71,8 +71,8 @@ typedef struct {
 typedef struct {
 	Header_t Header;
 	uint16_t Offset;
-	uint8_t Size;
-	uint8_t Padding;
+	uint8_t  Size;
+	uint8_t  Padding;
 	uint32_t Timestamp;
 } CMD_051B_t;

@@ -80,19 +80,19 @@ typedef struct {
 	Header_t Header;
 	struct {
 		uint16_t Offset;
-		uint8_t Size;
-		uint8_t Padding;
-		uint8_t Data[128];
+		uint8_t  Size;
+		uint8_t  Padding;
+		uint8_t  Data[128];
 	} Data;
 } REPLY_051B_t;

 typedef struct {
 	Header_t Header;
 	uint16_t Offset;
-	uint8_t Size;
-	bool bAllowPassword;
+	uint8_t  Size;
+	bool     bAllowPassword;
 	uint32_t Timestamp;
-	uint8_t Data[0];
+	uint8_t  Data[0];
 } CMD_051D_t;

 typedef struct {
@@ -106,8 +106,8 @@ typedef struct {
 	Header_t Header;
 	struct {
 		uint16_t RSSI;
-		uint8_t ExNoiseIndicator;
-		uint8_t GlitchIndicator;
+		uint8_t  ExNoiseIndicator;
+		uint8_t  GlitchIndicator;
 	} Data;
 } REPLY_0527_t;

@@ -137,7 +137,10 @@ typedef struct {
 	uint32_t Timestamp;
 } CMD_052F_t;

-static const uint8_t Obfuscation[16] = { 0x16, 0x6C, 0x14, 0xE6, 0x2E, 0x91, 0x0D, 0x40, 0x21, 0x35, 0xD5, 0x40, 0x13, 0x03, 0xE9, 0x80 };
+static const uint8_t Obfuscation[16] =
+{
+	0x16, 0x6C, 0x14, 0xE6, 0x2E, 0x91, 0x0D, 0x40, 0x21, 0x35, 0xD5, 0x40, 0x13, 0x03, 0xE9, 0x80
+};

 static union
 {
@@ -157,12 +160,11 @@ static void SendReply(void *pReply, uint16_t Size)
 {
 	Header_t Header;
 	Footer_t Footer;
-	uint8_t *pBytes;
-	uint16_t i;

 	if (bIsEncrypted)
 	{
-		pBytes = (uint8_t *)pReply;
+		uint8_t     *pBytes = (uint8_t *)pReply;
+		unsigned int i;
 		for (i = 0; i < Size; i++)
 			pBytes[i] ^= Obfuscation[i % 16];
 	}
@@ -171,6 +173,7 @@ static void SendReply(void *pReply, uint16_t Size)
 	Header.Size = Size;
 	UART_Send(&Header, sizeof(Header));
 	UART_Send(pReply, Size);
+
 	if (bIsEncrypted)
 	{
 		Footer.Padding[0] = Obfuscation[(Size + 0) % 16] ^ 0xFF;
@@ -205,14 +208,16 @@ static void SendVersion(void)

 static bool IsBadChallenge(const uint32_t *pKey, const uint32_t *pIn, const uint32_t *pResponse)
 {
-	uint8_t i;
-	uint32_t IV[4];
+	unsigned int i;
+	uint32_t     IV[4];

 	IV[0] = 0;
 	IV[1] = 0;
 	IV[2] = 0;
 	IV[3] = 0;
+
 	AES_Encrypt(pKey, IV, pIn, IV, true);
+
 	for (i = 0; i < 4; i++)
 		if (IV[i] != pResponse[i])
 			return true;
@@ -254,10 +259,10 @@ static void CMD_051B(const uint8_t *pBuffer)
 	#endif

 	memset(&Reply, 0, sizeof(Reply));
-	Reply.Header.ID = 0x051C;
+	Reply.Header.ID   = 0x051C;
 	Reply.Header.Size = pCmd->Size + 4;
 	Reply.Data.Offset = pCmd->Offset;
-	Reply.Data.Size = pCmd->Size;
+	Reply.Data.Size   = pCmd->Size;

 	if (bHasCustomAesKey)
 		bLocked = gIsLocked;
@@ -294,7 +299,7 @@ static void CMD_051D(const uint8_t *pBuffer)

 	if (!bIsLocked)
 	{
-		uint16_t i;
+		unsigned int i;
 		for (i = 0; i < (pCmd->Size / 8); i++)
 		{
 			const uint16_t Offset = pCmd->Offset + (i * 8U);
@@ -331,23 +336,25 @@ static void CMD_0529(void)
 {
 	REPLY_0529_t Reply;

-	Reply.Header.ID = 0x52A;
+	Reply.Header.ID   = 0x52A;
 	Reply.Header.Size = sizeof(Reply.Data);
+
 	// Original doesn't actually send current!
 	BOARD_ADC_GetBatteryInfo(&Reply.Data.Voltage, &Reply.Data.Current);
+
 	SendReply(&Reply, sizeof(Reply));
 }

 static void CMD_052D(const uint8_t *pBuffer)
 {
 	const CMD_052D_t *pCmd = (const CMD_052D_t *)pBuffer;
-	REPLY_052D_t Reply;
-	bool bIsLocked;
+	REPLY_052D_t      Reply;
+	bool              bIsLocked;

 	#ifdef ENABLE_FMRADIO
 		gFmRadioCountdown_500ms = fm_radio_countdown_500ms;
 	#endif
-	Reply.Header.ID = 0x052E;
+	Reply.Header.ID   = 0x052E;
 	Reply.Header.Size = sizeof(Reply.Data);

 	bIsLocked = bHasCustomAesKey;
@@ -385,7 +392,7 @@ static void CMD_052F(const uint8_t *pBuffer)

 	gEeprom.DUAL_WATCH                               = DUAL_WATCH_OFF;
 	gEeprom.CROSS_BAND_RX_TX                         = CROSS_BAND_OFF;
-	gEeprom.RX_CHANNEL                               = 0;
+	gEeprom.RX_VFO                                   = 0;
 	gEeprom.DTMF_SIDE_TONE                           = false;
 	gEeprom.VfoInfo[0].FrequencyReverse              = false;
 	gEeprom.VfoInfo[0].pRX                           = &gEeprom.VfoInfo[0].freq_config_RX;
@@ -413,15 +420,13 @@ static void CMD_052F(const uint8_t *pBuffer)

 bool UART_IsCommandAvailable(void)
 {
-	uint16_t DmaLength;
-	uint16_t CommandLength;
 	uint16_t Index;
 	uint16_t TailIndex;
 	uint16_t Size;
 	uint16_t CRC;
-	uint16_t i;
+	uint16_t CommandLength;
+	uint16_t DmaLength = DMA_CH0->ST & 0xFFFU;

-	DmaLength = DMA_CH0->ST & 0xFFFU;
 	while (1)
 	{
 		if (gUART_WriteIndex == DmaLength)
@@ -450,7 +455,7 @@ bool UART_IsCommandAvailable(void)
 	Index = DMA_INDEX(gUART_WriteIndex, 2);
 	Size  = (UART_DMA_Buffer[DMA_INDEX(Index, 1)] << 8) | UART_DMA_Buffer[Index];

-	if ((Size + 8) > sizeof(UART_DMA_Buffer))
+	if ((Size + 8u) > sizeof(UART_DMA_Buffer))
 	{
 		gUART_WriteIndex = DmaLength;
 		return false;
@@ -495,8 +500,11 @@ bool UART_IsCommandAvailable(void)
 		bIsEncrypted = true;

 	if (bIsEncrypted)
-		for (i = 0; i < Size + 2; i++)
+	{
+		unsigned int i;
+		for (i = 0; i < (Size + 2u); i++)
 			UART_Command.Buffer[i] ^= Obfuscation[i % 16];
+	}
 	
 	CRC = UART_Command.Buffer[Size] | (UART_Command.Buffer[Size + 1] << 8);

--- a/audio.c
+++ b/audio.c
@@ -142,6 +142,9 @@ void AUDIO_PlayBeep(BEEP_Type_t Beep)

 	SYSTEM_DelayMs(60);

+	#pragma GCC diagnostic push
+	#pragma GCC diagnostic ignored "-Wimplicit-fallthrough="
+
 	switch (Beep)
 	{
 		case BEEP_880HZ_60MS_TRIPLE_BEEP:
@@ -181,13 +184,17 @@ void AUDIO_PlayBeep(BEEP_Type_t Beep)
 			break;
 	}

+	#pragma GCC diagnostic pop
+
 	SYSTEM_DelayMs(Duration);
 	BK4819_EnterTxMute();
 	SYSTEM_DelayMs(20);

 	GPIO_ClearBit(&GPIOC->DATA, GPIOC_PIN_AUDIO_PATH);

-	gVoxResumeCountdown = 80;
+	#ifdef ENABLE_VOX
+		gVoxResumeCountdown = 80;
+	#endif

 	SYSTEM_DelayMs(5);
 	BK4819_TurnsOffTones_TurnsOnRX();
@@ -258,7 +265,9 @@ void AUDIO_PlayBeep(BEEP_Type_t Beep)
 				VoiceID += VOICE_ID_ENG_BASE;
 			}
 	
-			if (gCurrentFunction == FUNCTION_RECEIVE || gCurrentFunction == FUNCTION_MONITOR)
+			if (gCurrentFunction == FUNCTION_RECEIVE ||
+			    gCurrentFunction == FUNCTION_MONITOR ||
+			    gCurrentFunction == FUNCTION_INCOMING)   // 1of11
 				BK4819_SetAF(BK4819_AF_MUTE);
 	
 			#ifdef ENABLE_FMRADIO
@@ -267,7 +276,11 @@ void AUDIO_PlayBeep(BEEP_Type_t Beep)
 			#endif
 			
 			GPIO_SetBit(&GPIOC->DATA, GPIOC_PIN_AUDIO_PATH);
-			gVoxResumeCountdown = 2000;
+
+			#ifdef ENABLE_VOX
+				gVoxResumeCountdown = 2000;
+			#endif
+			
 			SYSTEM_DelayMs(5);
 			AUDIO_PlayVoice(VoiceID);
 	
@@ -278,8 +291,10 @@ void AUDIO_PlayBeep(BEEP_Type_t Beep)
 			{
 				SYSTEM_DelayMs(Delay * 10);
 	
-				if (gCurrentFunction == FUNCTION_RECEIVE || gCurrentFunction == FUNCTION_MONITOR)
-					BK4819_SetAF(gRxVfo->AM_mode ? BK4819_AF_AM : BK4819_AF_OPEN);
+				if (gCurrentFunction == FUNCTION_RECEIVE ||
+				    gCurrentFunction == FUNCTION_MONITOR ||
+					gCurrentFunction == FUNCTION_INCOMING)	// 1of11
+					BK4819_SetAF(gRxVfo->AM_mode ? BK4819_AF_AM : BK4819_AF_FM);
 	
 				#ifdef ENABLE_FMRADIO
 					if (gFmRadioMode)
@@ -291,7 +306,11 @@ void AUDIO_PlayBeep(BEEP_Type_t Beep)
 	
 				gVoiceWriteIndex    = 0;
 				gVoiceReadIndex     = 0;
-				gVoxResumeCountdown = 80;
+	
+				#ifdef ENABLE_VOX
+					gVoxResumeCountdown = 80;
+				#endif
+					
 				return;
 			}
 	
@@ -404,14 +423,19 @@ void AUDIO_PlayBeep(BEEP_Type_t Beep)
 				
 				gCountdownToPlayNextVoice_10ms = Delay;
 				gFlagPlayQueuedVoice           = false;
-				gVoxResumeCountdown            = 2000;
+
+				#ifdef ENABLE_VOX
+					gVoxResumeCountdown = 2000;
+				#endif
 	
 				return;
 			}
 		}
 	
-		if (gCurrentFunction == FUNCTION_RECEIVE || gCurrentFunction == FUNCTION_MONITOR)
-			BK4819_SetAF(gRxVfo->AM_mode ? BK4819_AF_AM : BK4819_AF_OPEN);
+		if (gCurrentFunction == FUNCTION_RECEIVE ||
+		    gCurrentFunction == FUNCTION_MONITOR ||
+		    gCurrentFunction == FUNCTION_INCOMING)    // 1of11
+			BK4819_SetAF(gRxVfo->AM_mode ? BK4819_AF_AM : BK4819_AF_FM);
 	
 		#ifdef ENABLE_FMRADIO
 			if (gFmRadioMode)
@@ -421,7 +445,10 @@ void AUDIO_PlayBeep(BEEP_Type_t Beep)
 		if (!gEnableSpeaker)
 			GPIO_ClearBit(&GPIOC->DATA, GPIOC_PIN_AUDIO_PATH);
 	
-		gVoxResumeCountdown = 80;
+		#ifdef ENABLE_VOX
+			gVoxResumeCountdown = 80;
+		#endif
+		
 		gVoiceWriteIndex    = 0;
 		gVoiceReadIndex     = 0;
 	}
--- a/bitmaps.c
+++ b/bitmaps.c
@@ -138,27 +138,29 @@ const uint8_t BITMAP_F_Key[6] =
 	0b01000001
 };

-const uint8_t BITMAP_VOX[18] =
-{	// "VOX"
-	0b00000000,
-	0b00011111,
-	0b00100000,
-	0b01000000,
-	0b00100000,
-	0b00011111,
-	0b00000000,
-	0b00111110,
-	0b01000001,
-	0b01000001,
-	0b01000001,
-	0b00111110,
-	0b00000000,
-	0b01100011,
-	0b00010100,
-	0b00001000,
-	0b00010100,
-	0b01100011
-};
+#ifdef ENABLE_VOX
+	const uint8_t BITMAP_VOX[18] =
+	{	// "VOX"
+		0b00000000,
+		0b00011111,
+		0b00100000,
+		0b01000000,
+		0b00100000,
+		0b00011111,
+		0b00000000,
+		0b00111110,
+		0b01000001,
+		0b01000001,
+		0b01000001,
+		0b00111110,
+		0b00000000,
+		0b01100011,
+		0b00010100,
+		0b00001000,
+		0b00010100,
+		0b01100011
+	};
+#endif

 #if 0
 	const uint8_t BITMAP_WX[12] =
@@ -280,23 +282,6 @@ const uint8_t BITMAP_TDR2[12] =
 	};
 #endif

-const uint8_t BITMAP_SC[12] =
-{	// "SC"
-	0b00000000,
-	0b01000110,
-	0b01001001,
-	0b01001001,
-	0b01001001,
-	0b00110001,
-
-	0b00000000,
-	0b00111110,
-	0b01000001,
-	0b01000001,
-	0b01000001,
-	0b00100010
-};
-
 const uint8_t BITMAP_Antenna[5] =
 {
 	0b00000011,
@@ -383,17 +368,7 @@ const uint8_t BITMAP_VFO_NotDefault[8] =
 	0b00010100,
 	0b00001000
 };
-/*
-const uint8_t BITMAP_ScanList[6] =
-{	// diamond symbol
-	0b00001000,
-	0b00011100,
-	0b00111110,
-	0b00111110,
-	0b00011100,
-	0b00001000
-};
-*/
+
 const uint8_t BITMAP_ScanList1[6] =
 {	// 'I' symbol
 	0b00000000,
@@ -414,14 +389,12 @@ const uint8_t BITMAP_ScanList2[6] =
 	0b01000010
 };

-#ifdef ENABLE_COMPANDER
-	const uint8_t BITMAP_compand[6] =
-	{
-		0b00000000,
-		0b00111100,
-		0b01000010,
-		0b01000010,
-		0b01000010,
-		0b00100100
-	};
-#endif
+const uint8_t BITMAP_compand[6] =
+{
+	0b00000000,
+	0b00111100,
+	0b01000010,
+	0b01000010,
+	0b01000010,
+	0b00100100
+};
--- a/bitmaps.h
+++ b/bitmaps.h
@@ -21,7 +21,9 @@ extern const uint8_t BITMAP_KeyLock[6];

 extern const uint8_t BITMAP_F_Key[6];

-extern const uint8_t BITMAP_VOX[18];
+#ifdef ENABLE_VOX
+	extern const uint8_t BITMAP_VOX[18];
+#endif

 #if 0
 	extern const uint8_t BITMAP_WX[12];
@@ -44,8 +46,6 @@ extern const uint8_t BITMAP_TDR2[12];
 	extern const uint8_t BITMAP_NOAA[12];
 #endif

-extern const uint8_t BITMAP_SC[12];
-
 extern const uint8_t BITMAP_Antenna[5];
 extern const uint8_t BITMAP_AntennaLevel1[3];
 extern const uint8_t BITMAP_AntennaLevel2[3];
@@ -59,13 +59,10 @@ extern const uint8_t BITMAP_MARKER[8];
 extern const uint8_t BITMAP_VFO_Default[8];
 extern const uint8_t BITMAP_VFO_NotDefault[8];

-//extern const uint8_t BITMAP_ScanList[6];
 extern const uint8_t BITMAP_ScanList1[6];
 extern const uint8_t BITMAP_ScanList2[6];

-#ifdef ENABLE_COMPANDER
-	extern const uint8_t BITMAP_compand[6];
-#endif
+extern const uint8_t BITMAP_compand[6];

 #endif

--- a/board.c
+++ b/board.c
@@ -509,7 +509,7 @@ void BOARD_Init(void)
 	BOARD_PORTCON_Init();
 	BOARD_GPIO_Init();
 	BOARD_ADC_Init();
-	ST7565_Init();
+	ST7565_Init(true);
 	#ifdef ENABLE_FMRADIO
 		BK1080_Init(0, false);
 	#endif
@@ -532,8 +532,10 @@ void BOARD_EEPROM_Init(void)
 		gEeprom.NOAA_AUTO_SCAN   = (Data[3] <  2) ? Data[3] : false;
 	#endif
 	gEeprom.KEY_LOCK             = (Data[4] <  2) ? Data[4] : false;
-	gEeprom.VOX_SWITCH           = (Data[5] <  2) ? Data[5] : false;
-	gEeprom.VOX_LEVEL            = (Data[6] < 10) ? Data[6] : 1;
+	#ifdef ENABLE_VOX
+		gEeprom.VOX_SWITCH       = (Data[5] <  2) ? Data[5] : false;
+		gEeprom.VOX_LEVEL        = (Data[6] < 10) ? Data[6] : 1;
+	#endif
 	gEeprom.MIC_SENSITIVITY      = (Data[7] <  5) ? Data[7] : 4;

 	// 0E78..0E7F
@@ -614,7 +616,7 @@ void BOARD_EEPROM_Init(void)
 	#endif
 	gEeprom.ROGER                          = (Data[1] <  3) ? Data[1] : ROGER_MODE_OFF;
 	gEeprom.REPEATER_TAIL_TONE_ELIMINATION = (Data[2] < 11) ? Data[2] : 0;
-	gEeprom.TX_CHANNEL                     = (Data[3] <  2) ? Data[3] : 0;
+	gEeprom.TX_VFO                     = (Data[3] <  2) ? Data[3] : 0;

 	// 0ED0..0ED7
 	EEPROM_ReadBuffer(0x0ED0, Data, 8);
@@ -622,7 +624,7 @@ void BOARD_EEPROM_Init(void)
 	gEeprom.DTMF_SEPARATE_CODE           = DTMF_ValidateCodes((char *)(Data + 1), 1) ? Data[1] : '*';
 	gEeprom.DTMF_GROUP_CALL_CODE         = DTMF_ValidateCodes((char *)(Data + 2), 1) ? Data[2] : '#';
 	gEeprom.DTMF_DECODE_RESPONSE         = (Data[3] <   4) ? Data[3] : 0;
-	gEeprom.DTMF_AUTO_RESET_TIME         = (Data[4] <  61) ? Data[4] : 5;
+	gEeprom.DTMF_auto_reset_time         = (Data[4] <  61) ? Data[4] : (Data[4] >= 5) ? Data[4] : 10;
 	gEeprom.DTMF_PRELOAD_TIME            = (Data[5] < 101) ? Data[5] * 10 : 300;
 	gEeprom.DTMF_FIRST_CODE_PERSIST_TIME = (Data[6] < 101) ? Data[6] * 10 : 100;
 	gEeprom.DTMF_HASH_CODE_PERSIST_TIME  = (Data[7] < 101) ? Data[7] * 10 : 100;
@@ -685,7 +687,8 @@ void BOARD_EEPROM_Init(void)
 	
 	// 0F18..0F1F
 	EEPROM_ReadBuffer(0x0F18, Data, 8);
-	gEeprom.SCAN_LIST_DEFAULT = (Data[0] < 2) ? Data[0] : false;
+//	gEeprom.SCAN_LIST_DEFAULT = (Data[0] < 2) ? Data[0] : false;
+	gEeprom.SCAN_LIST_DEFAULT = (Data[0] < 3) ? Data[0] : false;  // we now have 'all' channel scan option
 	for (i = 0; i < 2; i++)
 	{
 		const unsigned int j = 1 + (i * 3);
@@ -705,14 +708,14 @@ void BOARD_EEPROM_Init(void)
 	gSetting_ScrambleEnable    = (Data[6] < 2) ? Data[6] : true;
 	gSetting_TX_EN             = (Data[7] & (1u << 0)) ? true : false;
 	gSetting_live_DTMF_decoder = (Data[7] & (1u << 1)) ? true : false;
-	gSetting_battery_text      = (((Data[7] >> 2) & 3u) <= 2) ? (Data[7] >> 2) & 3: 2;
+	gSetting_battery_text      = (((Data[7] >> 2) & 3u) <= 2) ? (Data[7] >> 2) & 3 : 2;
 	#ifdef ENABLE_AUDIO_BAR
 		gSetting_mic_bar       = (Data[7] & (1u << 4)) ? true : false;
 	#endif
 	#ifdef ENABLE_AM_FIX
 		gSetting_AM_fix        = (Data[7] & (1u << 5)) ? true : false;
 	#endif
-	gSetting_backlight_on_rx   = (Data[7] & (1u << 6)) ? true : false;
+	gSetting_backlight_on_tx_rx = (Data[7] >> 6) & 3u;

 	if (!gEeprom.VFO_OPEN)
 	{
@@ -757,8 +760,10 @@ void BOARD_EEPROM_LoadMoreSettings(void)
 	}
 	gBatteryCalibration[5] = 2300;

-	EEPROM_ReadBuffer(0x1F50 + (gEeprom.VOX_LEVEL * 2), &gEeprom.VOX1_THRESHOLD, 2);
-	EEPROM_ReadBuffer(0x1F68 + (gEeprom.VOX_LEVEL * 2), &gEeprom.VOX0_THRESHOLD, 2);
+	#ifdef ENABLE_VOX
+		EEPROM_ReadBuffer(0x1F50 + (gEeprom.VOX_LEVEL * 2), &gEeprom.VOX1_THRESHOLD, 2);
+		EEPROM_ReadBuffer(0x1F68 + (gEeprom.VOX_LEVEL * 2), &gEeprom.VOX0_THRESHOLD, 2);
+	#endif
 	
 	//EEPROM_ReadBuffer(0x1F80 + gEeprom.MIC_SENSITIVITY, &Mic, 1);
 	//gEeprom.MIC_SENSITIVITY_TUNING = (Mic < 32) ? Mic : 15;
--- a/driver/adc.c
+++ b/driver/adc.c
@@ -134,9 +134,9 @@ void ADC_Configure(ADC_Config_t *pAdc)
 		;

 	if (SARADC_IE == 0) {
-		NVIC_DisableIRQ(DP32_SARADC_IRQn);
+		NVIC_DisableIRQ((IRQn_Type)DP32_SARADC_IRQn);
 	} else {
-		NVIC_EnableIRQ(DP32_SARADC_IRQn);
+		NVIC_EnableIRQ((IRQn_Type)DP32_SARADC_IRQn);
 	}
 }

--- a/driver/adc.h
+++ b/driver/adc.h
@@ -42,8 +42,10 @@ enum ADC_CH_MASK {
 typedef enum ADC_CH_MASK ADC_CH_MASK;

 typedef struct {
-	uint8_t CLK_SEL;
+	uint16_t EXTTRIG_SEL;
+	uint16_t IE_CHx_EOC;
 	ADC_CH_MASK CH_SEL;
+	uint8_t CLK_SEL;
 	uint8_t AVG;
 	uint8_t CONT;
 	uint8_t MEM_MODE;
@@ -51,13 +53,12 @@ typedef struct {
 	uint8_t SMPL_SETUP;
 	uint8_t SMPL_WIN;
 	uint8_t ADC_TRIG;
-	uint16_t EXTTRIG_SEL;
-	bool CALIB_OFFSET_VALID;
-	bool CALIB_KD_VALID;
 	uint8_t DMA_EN;
-	uint16_t IE_CHx_EOC;
 	uint8_t IE_FIFO_HFULL;
 	uint8_t IE_FIFO_FULL;
+	bool CALIB_OFFSET_VALID;
+	bool CALIB_KD_VALID;
+	uint8_t _pad[1];
 } ADC_Config_t;

 uint8_t ADC_GetChannelNumber(ADC_CH_MASK Mask);
--- a/driver/aes.c
+++ b/driver/aes.c
@@ -24,6 +24,8 @@ static void AES_Setup_ENC_CBC(bool IsDecrypt, const void *pKey, const void *pIv)
 	const uint32_t *pK = (const uint32_t *)pKey;
 	const uint32_t *pI = (const uint32_t *)pIv;

+	(void)IsDecrypt;	// unused
+	
 	AES_CR = (AES_CR & ~AES_CR_EN_MASK) | AES_CR_EN_BITS_DISABLE;
 	AES_CR = AES_CR_CHMOD_BITS_CBC;
 	AES_KEYR3 = pK[0];
--- a/driver/bk4819.c
+++ b/driver/bk4819.c
--- a/driver/bk4819.h
+++ b/driver/bk4819.h
@@ -24,22 +24,22 @@

 enum BK4819_AF_Type_t
 {
-	BK4819_AF_MUTE     =  0u,
-	BK4819_AF_OPEN     =  1u,
-	BK4819_AF_ALAM     =  2u,
-	BK4819_AF_BEEP     =  3u,
-	BK4819_AF_UNKNOWN1 =  4u,
-	BK4819_AF_UNKNOWN2 =  5u,
-	BK4819_AF_CTCO     =  6u,
-	BK4819_AF_AM       =  7u,
-	BK4819_AF_FSKO     =  8u,
-	BK4819_AF_UNKNOWN3 =  9u,
-	BK4819_AF_UNKNOWN4 = 10u,
-	BK4819_AF_UNKNOWN5 = 11u,
-	BK4819_AF_UNKNOWN6 = 12u,
-	BK4819_AF_UNKNOWN7 = 13u,
-	BK4819_AF_UNKNOWN8 = 14u,
-	BK4819_AF_UNKNOWN9 = 15u
+	BK4819_AF_MUTE      =  0u,  //
+	BK4819_AF_FM        =  1u,  // FM
+	BK4819_AF_ALAM      =  2u,  //
+	BK4819_AF_BEEP      =  3u,  //
+	BK4819_AF_BASEBAND1 =  4u,  // SSB
+	BK4819_AF_BASEBAND2 =  5u,  // SSB
+	BK4819_AF_CTCO      =  6u,  // strange LF audio .. maybe the CTCSS LF line ?
+	BK4819_AF_AM        =  7u,  // AM
+	BK4819_AF_FSKO      =  8u,  // nothing
+	BK4819_AF_UNKNOWN3  =  9u,  // distorted
+	BK4819_AF_UNKNOWN4  = 10u,  // nothing at all
+	BK4819_AF_UNKNOWN5  = 11u,  // distorted
+	BK4819_AF_UNKNOWN6  = 12u,  // distorted
+	BK4819_AF_UNKNOWN7  = 13u,  // interesting
+	BK4819_AF_UNKNOWN8  = 14u,  // interesting 
+	BK4819_AF_UNKNOWN9  = 15u   // not a lot
 };

 typedef enum BK4819_AF_Type_t BK4819_AF_Type_t;
@@ -102,6 +102,7 @@ void     BK4819_DisableVox(void);
 void     BK4819_DisableDTMF(void);
 void     BK4819_EnableDTMF(void);
 void     BK4819_PlayTone(uint16_t Frequency, bool bTuningGainSwitch);
+void     BK4819_PlaySingleTone(const unsigned int tone_Hz, const unsigned int delay, const unsigned int level, const bool play_speaker);
 void     BK4819_EnterTxMute(void);
 void     BK4819_ExitTxMute(void);
 void     BK4819_Sleep(void);
--- a/driver/gpio.h
+++ b/driver/gpio.h
@@ -58,10 +58,10 @@ enum GPIOC_PINS {
 	GPIOC_PIN_PTT        = 5
 };

-void GPIO_ClearBit(volatile uint32_t *pReg, uint8_t Bit);
+void    GPIO_ClearBit(volatile uint32_t *pReg, uint8_t Bit);
 uint8_t GPIO_CheckBit(volatile uint32_t *pReg, uint8_t Bit);
-void GPIO_FlipBit(volatile uint32_t *pReg, uint8_t Bit);
-void GPIO_SetBit(volatile uint32_t *pReg, uint8_t Bit);
+void    GPIO_FlipBit( volatile uint32_t *pReg, uint8_t Bit);
+void    GPIO_SetBit(  volatile uint32_t *pReg, uint8_t Bit);

 #endif

--- a/driver/keyboard.c
+++ b/driver/keyboard.c
@@ -22,76 +22,74 @@
 #include "driver/i2c.h"
 #include "misc.h"

-KEY_Code_t gKeyReading0 = KEY_INVALID;
-KEY_Code_t gKeyReading1 = KEY_INVALID;
-uint16_t   gDebounceCounter;
-bool       gWasFKeyPressed;
+KEY_Code_t gKeyReading0     = KEY_INVALID;
+KEY_Code_t gKeyReading1     = KEY_INVALID;
+uint16_t   gDebounceCounter = 0;
+bool       gWasFKeyPressed  = false;

 static const struct {
-    // Using a 16 bit pre-calculated shift and invert is cheaper
-    // than using 8 bit and doing shift and invert in code.
-    uint16_t set_to_zero_mask;

-    //We are very fortunate.
-    //The key and pin defines fit together in a single u8,
-    //making this very efficient
-    struct {
-        uint8_t key : 5; //Key 23 is highest
-        uint8_t pin : 3; //Pin 6 is highest
-    } pins[4];
-} keyboard[5] = {
-    /* Zero row  */
-    {
-        //Set to zero to handle special case of nothing pulled down.
-        .set_to_zero_mask = ~(0),
-        .pins = {
-            { .key = KEY_SIDE1, .pin = GPIOA_PIN_KEYBOARD_0},
-            { .key = KEY_SIDE2, .pin = GPIOA_PIN_KEYBOARD_1},
-            /* Duplicate to fill the array with valid values */
-            { .key = KEY_SIDE2, .pin = GPIOA_PIN_KEYBOARD_1},
-            { .key = KEY_SIDE2, .pin = GPIOA_PIN_KEYBOARD_1},
-        }
-    },
-    /* First row  */
-    {
-        .set_to_zero_mask = ~(1 << GPIOA_PIN_KEYBOARD_4),
-        .pins = {
-            { .key = KEY_MENU,  .pin = GPIOA_PIN_KEYBOARD_0},
-            { .key = KEY_1,     .pin = GPIOA_PIN_KEYBOARD_1},
-            { .key = KEY_4,     .pin = GPIOA_PIN_KEYBOARD_2},
-            { .key = KEY_7,     .pin = GPIOA_PIN_KEYBOARD_3},
-        }
-    },
-    /* Second row */
-    {
-        .set_to_zero_mask = ~(1 << GPIOA_PIN_KEYBOARD_5),
-        .pins = {
-            { .key = KEY_UP,    .pin = GPIOA_PIN_KEYBOARD_0},
-            { .key = KEY_2 ,    .pin = GPIOA_PIN_KEYBOARD_1},
-            { .key = KEY_5 ,    .pin = GPIOA_PIN_KEYBOARD_2},
-            { .key = KEY_8 ,    .pin = GPIOA_PIN_KEYBOARD_3},
-        }
-    },
-    /* Third row */
-    {
-        .set_to_zero_mask = ~(1 << GPIOA_PIN_KEYBOARD_6),
-        .pins = {
-            { .key = KEY_DOWN,  .pin = GPIOA_PIN_KEYBOARD_0},
-            { .key = KEY_3   ,  .pin = GPIOA_PIN_KEYBOARD_1},
-            { .key = KEY_6   ,  .pin = GPIOA_PIN_KEYBOARD_2},
-            { .key = KEY_9   ,  .pin = GPIOA_PIN_KEYBOARD_3},
-        }
-    },
-    /* Fourth row */
-    {
-        .set_to_zero_mask = ~(1 << GPIOA_PIN_KEYBOARD_7),
-        .pins = {
-            { .key = KEY_EXIT,  .pin = GPIOA_PIN_KEYBOARD_0},
-            { .key = KEY_STAR,  .pin = GPIOA_PIN_KEYBOARD_1},
-            { .key = KEY_0   ,  .pin = GPIOA_PIN_KEYBOARD_2},
-            { .key = KEY_F   ,  .pin = GPIOA_PIN_KEYBOARD_3},
-        }
-    },
+	// Using a 16 bit pre-calculated shift and invert is cheaper
+	// than using 8 bit and doing shift and invert in code.
+	uint16_t set_to_zero_mask;
+
+	// We are very fortunate.
+	// The key and pin defines fit together in a single u8, making this very efficient
+	struct {
+		KEY_Code_t key : 5;
+		uint8_t    pin : 3; // Pin 6 is highest
+	} pins[4];
+
+} keyboard[] = {
+
+	{	// Zero row
+		// Set to zero to handle special case of nothing pulled down
+		.set_to_zero_mask = 0xffff,
+		.pins = {
+			{ .key = KEY_SIDE1,   .pin = GPIOA_PIN_KEYBOARD_0},
+			{ .key = KEY_SIDE2,   .pin = GPIOA_PIN_KEYBOARD_1},
+
+			// Duplicate to fill the array with valid values
+			{ .key = KEY_INVALID, .pin = GPIOA_PIN_KEYBOARD_1},
+			{ .key = KEY_INVALID, .pin = GPIOA_PIN_KEYBOARD_1}
+		}
+	},
+	{	// First row
+		.set_to_zero_mask = ~(1u << GPIOA_PIN_KEYBOARD_4) & 0xffff,
+		.pins = {
+			{ .key = KEY_MENU,  .pin = GPIOA_PIN_KEYBOARD_0},
+			{ .key = KEY_1,     .pin = GPIOA_PIN_KEYBOARD_1},
+			{ .key = KEY_4,     .pin = GPIOA_PIN_KEYBOARD_2},
+			{ .key = KEY_7,     .pin = GPIOA_PIN_KEYBOARD_3}
+		}
+	},
+	{	// Second row
+		.set_to_zero_mask = ~(1u << GPIOA_PIN_KEYBOARD_5) & 0xffff,
+		.pins = {
+			{ .key = KEY_UP,    .pin = GPIOA_PIN_KEYBOARD_0},
+			{ .key = KEY_2 ,    .pin = GPIOA_PIN_KEYBOARD_1},
+			{ .key = KEY_5 ,    .pin = GPIOA_PIN_KEYBOARD_2},
+			{ .key = KEY_8 ,    .pin = GPIOA_PIN_KEYBOARD_3}
+		}
+	},
+	{	// Third row
+		.set_to_zero_mask = ~(1u << GPIOA_PIN_KEYBOARD_6) & 0xffff,
+		.pins = {
+			{ .key = KEY_DOWN,  .pin = GPIOA_PIN_KEYBOARD_0},
+			{ .key = KEY_3   ,  .pin = GPIOA_PIN_KEYBOARD_1},
+			{ .key = KEY_6   ,  .pin = GPIOA_PIN_KEYBOARD_2},
+			{ .key = KEY_9   ,  .pin = GPIOA_PIN_KEYBOARD_3}
+		}
+	},
+	{	// Fourth row
+		.set_to_zero_mask = ~(1u << GPIOA_PIN_KEYBOARD_7) & 0xffff,
+		.pins = {
+			{ .key = KEY_EXIT,  .pin = GPIOA_PIN_KEYBOARD_0},
+			{ .key = KEY_STAR,  .pin = GPIOA_PIN_KEYBOARD_1},
+			{ .key = KEY_0   ,  .pin = GPIOA_PIN_KEYBOARD_2},
+			{ .key = KEY_F   ,  .pin = GPIOA_PIN_KEYBOARD_3}
+		}
+	}
 };

 KEY_Code_t KEYBOARD_Poll(void)
@@ -101,42 +99,61 @@ KEY_Code_t KEYBOARD_Poll(void)
 //	if (!GPIO_CheckBit(&GPIOC->DATA, GPIOC_PIN_PTT))
 //		return KEY_PTT;

-
 	// *****************
-        for(int j = 0; j < ARRAY_SIZE(keyboard); j++) {
-            //Set all high
-            GPIOA->DATA |=  1 << GPIOA_PIN_KEYBOARD_4 |
-                            1 << GPIOA_PIN_KEYBOARD_5 |
-                            1 << GPIOA_PIN_KEYBOARD_6 |
-                            1 << GPIOA_PIN_KEYBOARD_7 ;
-            //Clear the pin we are selecting
-            GPIOA->DATA &= keyboard[j].set_to_zero_mask;

-            //Wait for the pins to stabilize. 1 works for me.
-            SYSTICK_DelayUs(2);
+	for (unsigned int j = 0; j < ARRAY_SIZE(keyboard); j++)
+	{
+		uint16_t reg;
+		unsigned int i;
+		unsigned int k;

-            // Read all 4 GPIO pins at once
-            uint16_t reg = GPIOA->DATA;
-            for(int i = 0; i < ARRAY_SIZE(keyboard[j].pins); i++)
-            {
-                uint16_t mask = 1 << keyboard[j].pins[i].pin;
-                if(! (reg & mask)) {
-                    Key = keyboard[j].pins[i].key;
-                    break;
-                }
-            }
+		// Set all high
+		GPIOA->DATA |=  1u << GPIOA_PIN_KEYBOARD_4 |
+						1u << GPIOA_PIN_KEYBOARD_5 |
+						1u << GPIOA_PIN_KEYBOARD_6 |
+						1u << GPIOA_PIN_KEYBOARD_7;

-            if (Key != KEY_INVALID)
-                break;
-        }
+		// Clear the pin we are selecting
+		GPIOA->DATA &= keyboard[j].set_to_zero_mask;

-        //Create I2C stop condition. Since we might have toggled I2C pins.
-        //This leaves GPIOA_PIN_KEYBOARD_4 and GPIOA_PIN_KEYBOARD_5 high
-        I2C_Stop();
+		// Read all 4 GPIO pins at once .. with de-noise, max of 8 sample loops
+		for (i = 0, k = 0, reg = 0; i < 3 && k < 8; i++, k++)
+		{
+			uint16_t reg2;
+
+			SYSTICK_DelayUs(1);
+
+			reg2 = GPIOA->DATA;
+			if (reg != reg2)
+			{	// noise
+				reg = reg2;
+				i   = 0;
+			}
+		}
+		if (i < 3)
+			break;	// noise is too bad
+
+		for (unsigned int i = 0; i < ARRAY_SIZE(keyboard[j].pins); i++)
+		{
+			const uint16_t mask = 1u << keyboard[j].pins[i].pin;
+			if (!(reg & mask))
+			{
+				Key = keyboard[j].pins[i].key;
+				break;
+			}
+		}
+
+		if (Key != KEY_INVALID)
+			break;
+	}
+
+	// Create I2C stop condition since we might have toggled I2C pins
+	// This leaves GPIOA_PIN_KEYBOARD_4 and GPIOA_PIN_KEYBOARD_5 high
+	I2C_Stop();

 	// Reset VOICE pins
 	GPIO_ClearBit(&GPIOA->DATA, GPIOA_PIN_KEYBOARD_6);
-	GPIO_SetBit(&GPIOA->DATA, GPIOA_PIN_KEYBOARD_7);
+	GPIO_SetBit(  &GPIOA->DATA, GPIOA_PIN_KEYBOARD_7);

 	return Key;
 }
--- a/driver/keyboard.h
+++ b/driver/keyboard.h
@@ -21,30 +21,29 @@
 #include <stdbool.h>
 #include <stdint.h>

-enum KEY_Code_t {
-	KEY_0       = 0,
-	KEY_1       = 1,
-	KEY_2       = 2,
-	KEY_3       = 3,
-	KEY_4       = 4,
-	KEY_5       = 5,
-	KEY_6       = 6,
-	KEY_7       = 7,
-	KEY_8       = 8,
-	KEY_9       = 9,
-	KEY_MENU    = 10,
-	KEY_UP      = 11,
-	KEY_DOWN    = 12,
-	KEY_EXIT    = 13,
-	KEY_STAR    = 14,
-	KEY_F       = 15,
-	KEY_PTT     = 21,
-	KEY_SIDE2   = 22,
-	KEY_SIDE1   = 23,
-	KEY_INVALID = 255
+enum KEY_Code_e {
+	KEY_0 = 0,  // 0
+	KEY_1,      // 1
+	KEY_2,      // 2
+	KEY_3,      // 3
+	KEY_4,      // 4
+	KEY_5,      // 5
+	KEY_6,      // 6
+	KEY_7,      // 7
+	KEY_8,      // 8
+	KEY_9,      // 9
+	KEY_MENU,   // A
+	KEY_UP,     // B
+	KEY_DOWN,   // C
+	KEY_EXIT,   // D
+	KEY_STAR,   // *
+	KEY_F,      // #
+	KEY_PTT,    //
+	KEY_SIDE2,  //
+	KEY_SIDE1,  //
+	KEY_INVALID //
 };
-
-typedef enum KEY_Code_t KEY_Code_t;
+typedef enum KEY_Code_e KEY_Code_t;

 extern KEY_Code_t gKeyReading0;
 extern KEY_Code_t gKeyReading1;
--- a/driver/spi.c
+++ b/driver/spi.c
@@ -93,9 +93,9 @@ void SPI_Configure(volatile SPI_Port_t *pPort, SPI_Config_t *pConfig)

 	if (pPort->IE) {
 		if (pPort == SPI0) {
-			NVIC_EnableIRQ(DP32_SPI0_IRQn);
+			NVIC_EnableIRQ((IRQn_Type)DP32_SPI0_IRQn);
 		} else if (pPort == SPI1) {
-			NVIC_EnableIRQ(DP32_SPI1_IRQn);
+			NVIC_EnableIRQ((IRQn_Type)DP32_SPI1_IRQn);
 		}
 	}
 }
--- a/driver/st7565.c
+++ b/driver/st7565.c
@@ -82,10 +82,10 @@ void ST7565_BlitFullScreen(void)
 	}

 	#if 0
-		// whats the delay for I wonder ?  .. it slows down scanning :(
+		// whats the delay for I wonder, it holds things up :(
 		SYSTEM_DelayMs(20);
 	#else
-		SYSTEM_DelayMs(1);
+//		SYSTEM_DelayMs(1);
 	#endif

 	SPI_ToggleMasterMode(&SPI0->CR, true);
@@ -119,7 +119,11 @@ void ST7565_FillScreen(uint8_t Value)
 {
 	unsigned int i;

+	// reset some of the displays settings to try and overcome the radios hardware problem - RF corrupting the display
+	ST7565_Init(false);
+	
 	SPI_ToggleMasterMode(&SPI0->CR, false);
+
 	for (i = 0; i < 8; i++)
 	{
 		unsigned int j;
@@ -132,20 +136,26 @@ void ST7565_FillScreen(uint8_t Value)
 		}
 		SPI_WaitForUndocumentedTxFifoStatusBit();
 	}
+
 	SPI_ToggleMasterMode(&SPI0->CR, true);
 }

-void ST7565_Init(void)
+void ST7565_Init(const bool full)
 {
-	SPI0_Init();
+	if (full)
+	{
+		SPI0_Init();
 	
-	ST7565_Configure_GPIO_B11();
+		ST7565_HardwareReset();
 	
-	SPI_ToggleMasterMode(&SPI0->CR, false);
+		SPI_ToggleMasterMode(&SPI0->CR, false);
 	
-	ST7565_WriteByte(0xE2);   // internal reset
+		ST7565_WriteByte(0xE2);   // internal reset
 	
-	SYSTEM_DelayMs(120);
+		SYSTEM_DelayMs(120);
+	}
+	else
+		SPI_ToggleMasterMode(&SPI0->CR, false);
 	
 	ST7565_WriteByte(0xA2);   // bias 9
 	ST7565_WriteByte(0xC0);   // com normal
@@ -157,21 +167,26 @@ void ST7565_Init(void)
 	ST7565_WriteByte(0xA4);   // all points normal
 	ST7565_WriteByte(0x24);   //
 	ST7565_WriteByte(0x81);   // volume first ?
+
 	ST7565_WriteByte(0x1f);   // contrast ?
-	ST7565_WriteByte(0x2B);   // power control ?

-	SYSTEM_DelayMs(1);
+	if (full)
+	{
+		ST7565_WriteByte(0x2B);   // power control ?
 	
-	ST7565_WriteByte(0x2E);   // power control ?
+		SYSTEM_DelayMs(1);
 	
-	SYSTEM_DelayMs(1);
+		ST7565_WriteByte(0x2E);   // power control ?
 	
-	ST7565_WriteByte(0x2F);   //
-	ST7565_WriteByte(0x2F);   //
-	ST7565_WriteByte(0x2F);   //
-	ST7565_WriteByte(0x2F);   //
+		SYSTEM_DelayMs(1);
 	
-	SYSTEM_DelayMs(40);
+		ST7565_WriteByte(0x2F);   //
+		ST7565_WriteByte(0x2F);   //
+		ST7565_WriteByte(0x2F);   //
+		ST7565_WriteByte(0x2F);   //
+	
+		SYSTEM_DelayMs(40);
+	}
 	
 	ST7565_WriteByte(0x40);   // start line ?
 	ST7565_WriteByte(0xAF);   // display on ?
@@ -180,10 +195,11 @@ void ST7565_Init(void)

 	SPI_ToggleMasterMode(&SPI0->CR, true);

-	ST7565_FillScreen(0x00);
+	if (full)
+		ST7565_FillScreen(0x00);
 }

-void ST7565_Configure_GPIO_B11(void)
+void ST7565_HardwareReset(void)
 {
 	GPIO_SetBit(&GPIOB->DATA, GPIOB_PIN_ST7565_RES);
 	SYSTEM_DelayMs(1);
--- a/driver/st7565.h
+++ b/driver/st7565.h
@@ -30,8 +30,8 @@ void ST7565_DrawLine(const unsigned int Column, const unsigned int Line, const u
 void ST7565_BlitFullScreen(void);
 void ST7565_BlitStatusLine(void);
 void ST7565_FillScreen(uint8_t Value);
-void ST7565_Init(void);
-void ST7565_Configure_GPIO_B11(void);
+void ST7565_Init(const bool full);
+void ST7565_HardwareReset(void);
 void ST7565_SelectColumnAndLine(uint8_t Column, uint8_t Line);
 void ST7565_WriteByte(uint8_t Value);

--- a/driver/systick.c
+++ b/driver/systick.c
@@ -29,26 +29,17 @@ void SYSTICK_Init(void)

 void SYSTICK_DelayUs(uint32_t Delay)
 {
-	uint32_t i;
-	uint32_t Start;
-	uint32_t Previous;
-	uint32_t Current;
-	uint32_t Delta;
-
-	i = 0;
-	Start = SysTick->LOAD;
-	Previous = SysTick->VAL;
+	const uint32_t ticks    = Delay * gTickMultiplier;
+	uint32_t       i        = 0;
+	uint32_t       Start    = SysTick->LOAD;
+	uint32_t       Previous = SysTick->VAL;
 	do {
-		do {
-			Current = SysTick->VAL;
-		} while (Current == Previous);
-		if (Current < Previous) {
-			Delta = -Current;
-		} else {
-			Delta = Start - Current;
-		}
-		i += Delta + Previous;
+		uint32_t Current;
+		uint32_t Delta;
+		while ((Current = SysTick->VAL) == Previous) {}
+		Delta    = (Current < Previous) ? -Current : Start - Current;
+		i       += Delta + Previous;
 		Previous = Current;
-	} while (i < Delay * gTickMultiplier);
+	} while (i < ticks);
 }

--- a/firmware.ld
+++ b/firmware.ld
@@ -17,7 +17,7 @@ SECTIONS
 	.text :
 	{
 		. = ALIGN(4);
-		*(.text.isr)           /* .text sections of code  */
+		KEEP(*(.text.isr)) /* .text sections of code  */
 		*(.text)           /* .text sections of code  */
 		*(.text*)          /* .text* sections of code */
 		*(.rodata)         /* .rodata sections        */
--- a/font.c
+++ b/font.c
@@ -19,6 +19,7 @@
 //const uint8_t gFontBig[95][16] =
 const uint8_t gFontBig[95][15] =
 {
+#if 0
 	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},  // , 0x00},     // ' '
 	{0x00, 0x00, 0x70, 0xF8, 0xF8, 0x70, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1B, 0x1B, 0x00, 0x00},  // , 0x00},     // '!'
 	{0x00, 0x1E, 0x3E, 0x00, 0x00, 0x3E, 0x1E, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},  // , 0x00},     // '"'
@@ -114,6 +115,103 @@ const uint8_t gFontBig[95][15] =
 	{0x00, 0x00, 0x00, 0x78, 0x78, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1F, 0x1F, 0x00, 0x00},  // , 0x00},     // '|'
 	{0x00, 0x08, 0x08, 0x78, 0xF0, 0x80, 0x80, 0x00, 0x00, 0x10, 0x10, 0x1F, 0x0F, 0x00, 0x00},  // , 0x00},     // '}'
 	{0x10, 0x18, 0x08, 0x18, 0x10, 0x18, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}   // , 0x00}      // '->'
+#else
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
+	{0x00, 0x00, 0x00, 0xFC, 0xFC, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0D, 0x0D, 0x00, 0x00},
+	{0x00, 0x0F, 0x1F, 0x00, 0x00, 0x1F, 0x0F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
+	{0x20, 0xF8, 0xF8, 0x20, 0xF8, 0xF8, 0x20, 0x00, 0x02, 0x0F, 0x0F, 0x02, 0x0F, 0x0F, 0x02},
+	{0x70, 0xF8, 0x88, 0x8E, 0x8E, 0x98, 0x10, 0x00, 0x04, 0x0C, 0x08, 0x38, 0x38, 0x0F, 0x07},
+	{0x30, 0x30, 0x00, 0x80, 0xC0, 0x60, 0x30, 0x00, 0x0C, 0x06, 0x03, 0x01, 0x00, 0x0C, 0x0C},
+	{0x80, 0xD8, 0x7C, 0xE4, 0xBC, 0xD8, 0x40, 0x00, 0x07, 0x0F, 0x08, 0x08, 0x07, 0x0F, 0x08},
+	{0x00, 0x10, 0x1F, 0x0F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
+	{0x00, 0x00, 0xF0, 0xF8, 0x0C, 0x04, 0x00, 0x00, 0x00, 0x00, 0x03, 0x07, 0x0C, 0x08, 0x00},
+	{0x00, 0x00, 0x04, 0x0C, 0xF8, 0xF0, 0x00, 0x00, 0x00, 0x00, 0x08, 0x0C, 0x07, 0x03, 0x00},
+	{0x00, 0x80, 0xA0, 0xE0, 0xC0, 0xE0, 0xA0, 0x80, 0x00, 0x00, 0x02, 0x03, 0x01, 0x03, 0x02},
+	{0x00, 0x80, 0x80, 0xE0, 0xE0, 0x80, 0x80, 0x00, 0x00, 0x00, 0x00, 0x03, 0x03, 0x00, 0x00},
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x1E, 0x0E, 0x00, 0x00},
+	{0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0C, 0x0C, 0x00, 0x00},
+	{0x00, 0x00, 0x00, 0x80, 0xC0, 0x60, 0x30, 0x00, 0x0C, 0x06, 0x03, 0x01, 0x00, 0x00, 0x00},
+	{0xF8, 0xFC, 0x84, 0xC4, 0x64, 0xFC, 0xF8, 0x00, 0x07, 0x0F, 0x09, 0x08, 0x08, 0x0F, 0x07},
+	{0x00, 0x10, 0x18, 0xFC, 0xFC, 0x00, 0x00, 0x00, 0x00, 0x08, 0x08, 0x0F, 0x0F, 0x08, 0x08},
+	{0x18, 0x1C, 0x04, 0x84, 0xC4, 0x7C, 0x38, 0x00, 0x0C, 0x0E, 0x0B, 0x09, 0x08, 0x08, 0x08},
+	{0x18, 0x1C, 0x44, 0x44, 0x44, 0xFC, 0xB8, 0x00, 0x06, 0x0E, 0x08, 0x08, 0x08, 0x0F, 0x07},
+	{0x80, 0xC0, 0x60, 0x30, 0x18, 0xFC, 0xFC, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x0F, 0x0F},
+	{0x7C, 0x7C, 0x44, 0x44, 0x44, 0xC4, 0x84, 0x00, 0x04, 0x0C, 0x08, 0x08, 0x08, 0x0F, 0x07},
+	{0xF0, 0xF8, 0x4C, 0x44, 0x44, 0xC4, 0x80, 0x00, 0x07, 0x0F, 0x08, 0x08, 0x08, 0x0F, 0x07},
+	{0x04, 0x04, 0x04, 0x84, 0xE4, 0x7C, 0x1C, 0x00, 0x00, 0x00, 0x0E, 0x0F, 0x01, 0x00, 0x00},
+	{0xB8, 0xFC, 0x44, 0x44, 0x44, 0xFC, 0xB8, 0x00, 0x07, 0x0F, 0x08, 0x08, 0x08, 0x0F, 0x07},
+	{0x78, 0xFC, 0x84, 0x84, 0x84, 0xFC, 0xF8, 0x00, 0x00, 0x08, 0x08, 0x08, 0x0C, 0x07, 0x03},
+	{0x00, 0x00, 0x00, 0x30, 0x30, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x06, 0x06, 0x00, 0x00},
+	{0x00, 0x00, 0x00, 0x30, 0x30, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x0E, 0x06, 0x00, 0x00},
+	{0x00, 0x80, 0xC0, 0x60, 0x30, 0x18, 0x08, 0x00, 0x00, 0x00, 0x01, 0x03, 0x06, 0x0C, 0x08},
+	{0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x00, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02},
+	{0x00, 0x08, 0x18, 0x30, 0x60, 0xC0, 0x80, 0x00, 0x00, 0x08, 0x0C, 0x06, 0x03, 0x01, 0x00},
+	{0x38, 0x3C, 0x04, 0x84, 0xC4, 0x7C, 0x38, 0x00, 0x00, 0x00, 0x00, 0x0D, 0x0D, 0x00, 0x00},
+	{0xF0, 0xF8, 0x08, 0xC8, 0xC8, 0xF8, 0xF0, 0x00, 0x07, 0x0F, 0x08, 0x0B, 0x0B, 0x0B, 0x01},
+	{0xF8, 0xFC, 0x84, 0x84, 0x84, 0xFC, 0xF8, 0x00, 0x0F, 0x0F, 0x00, 0x00, 0x00, 0x0F, 0x0F},
+	{0xFC, 0xFC, 0x44, 0x44, 0x44, 0xFC, 0xB8, 0x00, 0x0F, 0x0F, 0x08, 0x08, 0x08, 0x0F, 0x07},
+	{0xF8, 0xFC, 0x04, 0x04, 0x04, 0x1C, 0x18, 0x00, 0x07, 0x0F, 0x08, 0x08, 0x08, 0x0E, 0x06},
+	{0xFC, 0xFC, 0x04, 0x04, 0x0C, 0xF8, 0xF0, 0x00, 0x0F, 0x0F, 0x08, 0x08, 0x0C, 0x07, 0x03},
+	{0xFC, 0xFC, 0x44, 0x44, 0x44, 0x04, 0x04, 0x00, 0x0F, 0x0F, 0x08, 0x08, 0x08, 0x08, 0x08},
+	{0xFC, 0xFC, 0x44, 0x44, 0x44, 0x04, 0x04, 0x00, 0x0F, 0x0F, 0x00, 0x00, 0x00, 0x00, 0x00},
+	{0xF8, 0xFC, 0x04, 0x84, 0x84, 0x9C, 0x98, 0x00, 0x07, 0x0F, 0x08, 0x08, 0x08, 0x0F, 0x07},
+	{0xFC, 0xFC, 0x40, 0x40, 0x40, 0xFC, 0xFC, 0x00, 0x0F, 0x0F, 0x00, 0x00, 0x00, 0x0F, 0x0F},
+	{0x00, 0x00, 0x04, 0xFC, 0xFC, 0x04, 0x00, 0x00, 0x00, 0x00, 0x08, 0x0F, 0x0F, 0x08, 0x00},
+	{0x00, 0x00, 0x00, 0x04, 0xFC, 0xFC, 0x04, 0x00, 0x06, 0x0E, 0x08, 0x08, 0x0F, 0x07, 0x00},
+	{0xFC, 0xFC, 0xE0, 0x30, 0x18, 0x0C, 0x04, 0x00, 0x0F, 0x0F, 0x01, 0x03, 0x06, 0x0C, 0x08},
+	{0xFC, 0xFC, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0F, 0x0F, 0x08, 0x08, 0x08, 0x08, 0x08},
+	{0xFC, 0xFC, 0x18, 0x70, 0x18, 0xFC, 0xFC, 0x00, 0x0F, 0x0F, 0x00, 0x00, 0x00, 0x0F, 0x0F},
+	{0xFC, 0xFC, 0x60, 0xC0, 0x80, 0xFC, 0xFC, 0x00, 0x0F, 0x0F, 0x00, 0x00, 0x01, 0x0F, 0x0F},
+	{0xF8, 0xFC, 0x04, 0x04, 0x04, 0xFC, 0xF8, 0x00, 0x07, 0x0F, 0x08, 0x08, 0x08, 0x0F, 0x07},
+	{0xFC, 0xFC, 0x84, 0x84, 0x84, 0xFC, 0x78, 0x00, 0x0F, 0x0F, 0x00, 0x00, 0x00, 0x00, 0x00},
+	{0xF8, 0xFC, 0x04, 0x04, 0x04, 0xFC, 0xF8, 0x00, 0x07, 0x0F, 0x08, 0x0C, 0x0C, 0x1F, 0x17},
+	{0xFC, 0xFC, 0x84, 0x84, 0x84, 0xFC, 0x78, 0x00, 0x0F, 0x0F, 0x01, 0x03, 0x06, 0x0C, 0x08},
+	{0x38, 0x7C, 0x44, 0x44, 0x44, 0xCC, 0x88, 0x00, 0x06, 0x0E, 0x08, 0x08, 0x08, 0x0F, 0x07},
+	{0x00, 0x04, 0x04, 0xFC, 0xFC, 0x04, 0x04, 0x00, 0x00, 0x00, 0x00, 0x0F, 0x0F, 0x00, 0x00},
+	{0xFC, 0xFC, 0x00, 0x00, 0x00, 0xFC, 0xFC, 0x00, 0x07, 0x0F, 0x08, 0x08, 0x08, 0x0F, 0x07},
+	{0x7C, 0xFC, 0x80, 0x00, 0x80, 0xFC, 0x7C, 0x00, 0x00, 0x03, 0x0F, 0x0C, 0x0F, 0x03, 0x00},
+	{0xFC, 0xFC, 0x00, 0x80, 0x00, 0xFC, 0xFC, 0x00, 0x0F, 0x0F, 0x06, 0x03, 0x06, 0x0F, 0x0F},
+	{0x0C, 0x3C, 0xF0, 0xC0, 0xF0, 0x3C, 0x0C, 0x00, 0x0C, 0x0F, 0x03, 0x00, 0x03, 0x0F, 0x0C},
+	{0x00, 0x3C, 0x7C, 0xC0, 0xC0, 0x7C, 0x3C, 0x00, 0x00, 0x00, 0x00, 0x0F, 0x0F, 0x00, 0x00},
+	{0x04, 0x04, 0x84, 0xC4, 0x64, 0x3C, 0x1C, 0x00, 0x0E, 0x0F, 0x09, 0x08, 0x08, 0x08, 0x08},
+	{0x00, 0x00, 0xFC, 0xFC, 0x04, 0x04, 0x00, 0x00, 0x00, 0x00, 0x0F, 0x0F, 0x08, 0x08, 0x00},
+	{0x38, 0x70, 0xE0, 0xC0, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x03, 0x07, 0x0E},
+	{0x00, 0x00, 0x04, 0x04, 0xFC, 0xFC, 0x00, 0x00, 0x00, 0x00, 0x08, 0x08, 0x0F, 0x0F, 0x00},
+	{0x08, 0x0C, 0x06, 0x03, 0x06, 0x0C, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20},
+	{0x00, 0x00, 0x03, 0x07, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
+	{0x00, 0xA0, 0xA0, 0xA0, 0xA0, 0xE0, 0xC0, 0x00, 0x07, 0x0F, 0x08, 0x08, 0x08, 0x0F, 0x0F},
+	{0xFC, 0xFC, 0x20, 0x20, 0x20, 0xE0, 0xC0, 0x00, 0x0F, 0x0F, 0x08, 0x08, 0x08, 0x0F, 0x07},
+	{0xC0, 0xE0, 0x20, 0x20, 0x20, 0x60, 0x40, 0x00, 0x07, 0x0F, 0x08, 0x08, 0x08, 0x0C, 0x04},
+	{0xC0, 0xE0, 0x20, 0x20, 0x20, 0xFC, 0xFC, 0x00, 0x07, 0x0F, 0x08, 0x08, 0x08, 0x0F, 0x0F},
+	{0xC0, 0xE0, 0x20, 0x20, 0x20, 0xE0, 0xC0, 0x00, 0x07, 0x0F, 0x09, 0x09, 0x09, 0x09, 0x01},
+	{0x20, 0x20, 0xF8, 0xFC, 0x24, 0x24, 0x04, 0x00, 0x00, 0x00, 0x0F, 0x0F, 0x00, 0x00, 0x00},
+	{0xC0, 0xE0, 0x20, 0x20, 0x20, 0xE0, 0xE0, 0x00, 0x07, 0x4F, 0x48, 0x48, 0x48, 0x7F, 0x3F},
+	{0xFC, 0xFC, 0x20, 0x20, 0x20, 0xE0, 0xC0, 0x00, 0x0F, 0x0F, 0x00, 0x00, 0x00, 0x0F, 0x0F},
+	{0x00, 0x00, 0x20, 0xEC, 0xEC, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x0F, 0x0F, 0x08, 0x00},
+	{0x00, 0x00, 0x00, 0x00, 0x20, 0xEC, 0xEC, 0x00, 0x00, 0x30, 0x70, 0x40, 0x40, 0x7F, 0x3F},
+	{0xFC, 0xFC, 0x00, 0x80, 0xC0, 0x60, 0x20, 0x00, 0x0F, 0x0F, 0x01, 0x03, 0x06, 0x0C, 0x08},
+	{0x00, 0x00, 0x04, 0xFC, 0xFC, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x0F, 0x0F, 0x08, 0x00},
+	{0xE0, 0xE0, 0x20, 0xE0, 0x20, 0xE0, 0xC0, 0x00, 0x0F, 0x0F, 0x00, 0x0F, 0x00, 0x0F, 0x0F},
+	{0xE0, 0xE0, 0x20, 0x20, 0x20, 0xE0, 0xC0, 0x00, 0x0F, 0x0F, 0x00, 0x00, 0x00, 0x0F, 0x0F},
+	{0xC0, 0xE0, 0x20, 0x20, 0x20, 0xE0, 0xC0, 0x00, 0x07, 0x0F, 0x08, 0x08, 0x08, 0x0F, 0x07},
+	{0xE0, 0xE0, 0x20, 0x20, 0x20, 0xE0, 0xC0, 0x00, 0x7F, 0x7F, 0x08, 0x08, 0x08, 0x0F, 0x07},
+	{0xC0, 0xE0, 0x20, 0x20, 0x20, 0xE0, 0xE0, 0x00, 0x07, 0x0F, 0x08, 0x08, 0x08, 0x7F, 0x7F},
+	{0xE0, 0xE0, 0x60, 0x20, 0x20, 0x20, 0x20, 0x00, 0x0F, 0x0F, 0x00, 0x00, 0x00, 0x00, 0x00},
+	{0xC0, 0xE0, 0x20, 0x20, 0x20, 0x20, 0x20, 0x00, 0x08, 0x09, 0x09, 0x09, 0x09, 0x0F, 0x06},
+	{0x20, 0x20, 0xFC, 0xFC, 0x20, 0x20, 0x00, 0x00, 0x00, 0x00, 0x07, 0x0F, 0x08, 0x08, 0x08},
+	{0xE0, 0xE0, 0x00, 0x00, 0x00, 0xE0, 0xE0, 0x00, 0x07, 0x0F, 0x08, 0x08, 0x08, 0x0F, 0x0F},
+	{0xE0, 0xE0, 0x00, 0x00, 0x00, 0xE0, 0xE0, 0x00, 0x00, 0x03, 0x0F, 0x0C, 0x0F, 0x03, 0x00},
+	{0xE0, 0xE0, 0x00, 0x80, 0x00, 0xE0, 0xE0, 0x00, 0x07, 0x0F, 0x08, 0x0F, 0x08, 0x0F, 0x07},
+	{0x60, 0xE0, 0x80, 0x00, 0x80, 0xE0, 0x60, 0x00, 0x0C, 0x0E, 0x03, 0x01, 0x03, 0x0E, 0x0C},
+	{0xE0, 0xE0, 0x00, 0x00, 0x00, 0xE0, 0xE0, 0x00, 0x07, 0x4F, 0x48, 0x48, 0x48, 0x7F, 0x3F},
+	{0x20, 0x20, 0x20, 0xA0, 0xE0, 0x60, 0x20, 0x00, 0x0C, 0x0E, 0x0B, 0x09, 0x08, 0x08, 0x08},
+	{0x00, 0x00, 0x40, 0xF8, 0xBC, 0x04, 0x04, 0x00, 0x00, 0x00, 0x00, 0x07, 0x0F, 0x08, 0x08},
+	{0x00, 0x00, 0x00, 0xBC, 0xBC, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0F, 0x0F, 0x00, 0x00},
+	{0x00, 0x04, 0x04, 0xBC, 0xF8, 0x40, 0x00, 0x00, 0x00, 0x08, 0x08, 0x0F, 0x07, 0x00, 0x00},
+	{0x08, 0x0C, 0x04, 0x0C, 0x08, 0x0C, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}
+#endif
 };

 #if 0
@@ -132,7 +230,7 @@ const uint8_t gFontBig[95][15] =
 		{0x00, 0xF0, 0xF8, 0xB8, 0x1C, 0x0C, 0x0C, 0x0C, 0x0C, 0x1C, 0xB8, 0xF0, 0xE0, 0x00, 0x11, 0x33, 0x77, 0x67, 0x66, 0x66, 0x66, 0x76, 0x33, 0x3F, 0x1F, 0x07},
 		{0x00, 0x00, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00, 0x00, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x00, 0x00}
 	};
-#else
+#elif 0
 	// VCR font
 	const uint8_t gFontBigDigits[11][26] =
 	{
@@ -148,6 +246,22 @@ const uint8_t gFontBig[95][15] =
 		{0x00, 0x00, 0x78, 0xFC, 0xC6, 0x86, 0x86, 0x86, 0x86, 0x86, 0xFC, 0xF8, 0x00, 0x00, 0x00, 0x18, 0x38, 0x71, 0x61, 0x61, 0x61, 0x61, 0x71, 0x3F, 0x1F, 0x00},
 		{0x00, 0x00, 0x00, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00}
 	};
+#else
+	// Terminus font
+	const uint8_t gFontBigDigits[11][26] =
+	{
+		{0x00, 0x00, 0xFC, 0xFE, 0xFE, 0x06, 0x86, 0xC6, 0xE6, 0xFE, 0xFE, 0xFC, 0x00, 0x00, 0x00, 0x3F, 0x7F, 0x7F, 0x67, 0x63, 0x61, 0x60, 0x7F, 0x7F, 0x3F, 0x00},
+		{0x00, 0x00, 0x00, 0x00, 0x18, 0x1C, 0xFE, 0xFE, 0xFE, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x60, 0x60, 0x7F, 0x7F, 0x7F, 0x60, 0x60, 0x00, 0x00},
+		{0x00, 0x00, 0x1C, 0x1E, 0x1E, 0x06, 0x06, 0x06, 0x86, 0xFE, 0xFE, 0x7C, 0x00, 0x00, 0x00, 0x60, 0x70, 0x78, 0x7C, 0x6E, 0x67, 0x63, 0x61, 0x60, 0x60, 0x00},
+		{0x00, 0x00, 0x0C, 0x0E, 0x0E, 0x86, 0x86, 0x86, 0x86, 0xFE, 0xFE, 0x7C, 0x00, 0x00, 0x00, 0x30, 0x70, 0x70, 0x61, 0x61, 0x61, 0x61, 0x7F, 0x7F, 0x3E, 0x00},
+		{0x00, 0x00, 0x80, 0xC0, 0xE0, 0x70, 0x38, 0x1C, 0x0E, 0xFE, 0xFE, 0xFE, 0x00, 0x00, 0x00, 0x0F, 0x0F, 0x0F, 0x0C, 0x0C, 0x0C, 0x0C, 0x7F, 0x7F, 0x7F, 0x00},
+		{0x00, 0x00, 0xFE, 0xFE, 0xFE, 0xC6, 0xC6, 0xC6, 0xC6, 0xC6, 0xC6, 0x86, 0x00, 0x00, 0x00, 0x30, 0x70, 0x70, 0x60, 0x60, 0x60, 0x60, 0x7F, 0x7F, 0x3F, 0x00},
+		{0x00, 0x00, 0xF8, 0xFC, 0xFE, 0xC6, 0xC6, 0xC6, 0xC6, 0xC6, 0xC6, 0x80, 0x00, 0x00, 0x00, 0x3F, 0x7F, 0x7F, 0x60, 0x60, 0x60, 0x60, 0x7F, 0x7F, 0x3F, 0x00},
+		{0x00, 0x00, 0x0E, 0x0E, 0x0E, 0x06, 0x06, 0x86, 0xE6, 0xFE, 0x7E, 0x1E, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7C, 0x7F, 0x7F, 0x03, 0x00, 0x00, 0x00},
+		{0x00, 0x00, 0x7C, 0xFE, 0xFE, 0x86, 0x86, 0x86, 0x86, 0xFE, 0xFE, 0x7C, 0x00, 0x00, 0x00, 0x3F, 0x7F, 0x7F, 0x61, 0x61, 0x61, 0x61, 0x7F, 0x7F, 0x3F, 0x00},
+		{0x00, 0x00, 0xFC, 0xFE, 0xFE, 0x06, 0x06, 0x06, 0x06, 0xFE, 0xFE, 0xFC, 0x00, 0x00, 0x00, 0x01, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x7F, 0x3F, 0x1F, 0x00},
+		{0x00, 0x00, 0x00, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00}
+	};
 #endif
 /*
 const uint8_t gFontSmallDigits[11][7] =
@@ -165,174 +279,6 @@ const uint8_t gFontSmallDigits[11][7] =
 	{0x00, 0x08, 0x08, 0x08, 0x08, 0x08, 0x00}     // '-'
 };
 */
-
-#ifdef ENABLE_SPECTRUM
-
-const uint8_t gFont3x5[160][3] = {
-    {0x00, 0x00, 0x00}, //  32 - space
-    {0x00, 0x17, 0x00}, //  33 - exclam
-    {0x03, 0x00, 0x03}, //  34 - quotedbl
-    {0x1f, 0x0a, 0x1f}, //  35 - numbersign
-    {0x0a, 0x1f, 0x05}, //  36 - dollar
-    {0x09, 0x04, 0x12}, //  37 - percent
-    {0x0f, 0x17, 0x1c}, //  38 - ampersand
-    {0x00, 0x03, 0x00}, //  39 - quotesingle
-    {0x00, 0x0e, 0x11}, //  40 - parenleft
-    {0x11, 0x0e, 0x00}, //  41 - parenright
-    {0x05, 0x02, 0x05}, //  42 - asterisk
-    {0x04, 0x0e, 0x04}, //  43 - plus
-    {0x10, 0x08, 0x00}, //  44 - comma
-    {0x04, 0x04, 0x04}, //  45 - hyphen
-    {0x00, 0x10, 0x00}, //  46 - period
-    {0x18, 0x04, 0x03}, //  47 - slash
-    {0x1e, 0x11, 0x0f}, //  48 - zero
-    {0x02, 0x1f, 0x00}, //  49 - one
-    {0x19, 0x15, 0x12}, //  50 - two
-    {0x11, 0x15, 0x0a}, //  51 - three
-    {0x07, 0x04, 0x1f}, //  52 - four
-    {0x17, 0x15, 0x09}, //  53 - five
-    {0x1e, 0x15, 0x1d}, //  54 - six
-    {0x19, 0x05, 0x03}, //  55 - seven
-    {0x1f, 0x15, 0x1f}, //  56 - eight
-    {0x17, 0x15, 0x0f}, //  57 - nine
-    {0x00, 0x0a, 0x00}, //  58 - colon
-    {0x10, 0x0a, 0x00}, //  59 - semicolon
-    {0x04, 0x0a, 0x11}, //  60 - less
-    {0x0a, 0x0a, 0x0a}, //  61 - equal
-    {0x11, 0x0a, 0x04}, //  62 - greater
-    {0x01, 0x15, 0x03}, //  63 - question
-    {0x0e, 0x15, 0x16}, //  64 - at
-    {0x1e, 0x05, 0x1e}, //  65 - A
-    {0x1f, 0x15, 0x0a}, //  66 - B
-    {0x0e, 0x11, 0x11}, //  67 - C
-    {0x1f, 0x11, 0x0e}, //  68 - D
-    {0x1f, 0x15, 0x15}, //  69 - E
-    {0x1f, 0x05, 0x05}, //  70 - F
-    {0x0e, 0x15, 0x1d}, //  71 - G
-    {0x1f, 0x04, 0x1f}, //  72 - H
-    {0x11, 0x1f, 0x11}, //  73 - I
-    {0x08, 0x10, 0x0f}, //  74 - J
-    {0x1f, 0x04, 0x1b}, //  75 - K
-    {0x1f, 0x10, 0x10}, //  76 - L
-    {0x1f, 0x06, 0x1f}, //  77 - M
-    {0x1f, 0x0e, 0x1f}, //  78 - N
-    {0x0e, 0x11, 0x0e}, //  79 - O
-    {0x1f, 0x05, 0x02}, //  80 - P
-    {0x0e, 0x19, 0x1e}, //  81 - Q
-    {0x1f, 0x0d, 0x16}, //  82 - R
-    {0x12, 0x15, 0x09}, //  83 - S
-    {0x01, 0x1f, 0x01}, //  84 - T
-    {0x0f, 0x10, 0x1f}, //  85 - U
-    {0x07, 0x18, 0x07}, //  86 - V
-    {0x1f, 0x0c, 0x1f}, //  87 - W
-    {0x1b, 0x04, 0x1b}, //  88 - X
-    {0x03, 0x1c, 0x03}, //  89 - Y
-    {0x19, 0x15, 0x13}, //  90 - Z
-    {0x1f, 0x11, 0x11}, //  91 - bracketleft
-    {0x02, 0x04, 0x08}, //  92 - backslash
-    {0x11, 0x11, 0x1f}, //  93 - bracketright
-    {0x02, 0x01, 0x02}, //  94 - asciicircum
-    {0x10, 0x10, 0x10}, //  95 - underscore
-    {0x01, 0x02, 0x00}, //  96 - grave
-    {0x1a, 0x16, 0x1c}, //  97 - a
-    {0x1f, 0x12, 0x0c}, //  98 - b
-    {0x0c, 0x12, 0x12}, //  99 - c
-    {0x0c, 0x12, 0x1f}, // 100 - d
-    {0x0c, 0x1a, 0x16}, // 101 - e
-    {0x04, 0x1e, 0x05}, // 102 - f
-    {0x0c, 0x2a, 0x1e}, // 103 - g
-    {0x1f, 0x02, 0x1c}, // 104 - h
-    {0x00, 0x1d, 0x00}, // 105 - i
-    {0x10, 0x20, 0x1d}, // 106 - j
-    {0x1f, 0x0c, 0x12}, // 107 - k
-    {0x11, 0x1f, 0x10}, // 108 - l
-    {0x1e, 0x0e, 0x1e}, // 109 - m
-    {0x1e, 0x02, 0x1c}, // 110 - n
-    {0x0c, 0x12, 0x0c}, // 111 - o
-    {0x3e, 0x12, 0x0c}, // 112 - p
-    {0x0c, 0x12, 0x3e}, // 113 - q
-    {0x1c, 0x02, 0x02}, // 114 - r
-    {0x14, 0x1e, 0x0a}, // 115 - s
-    {0x02, 0x1f, 0x12}, // 116 - t
-    {0x0e, 0x10, 0x1e}, // 117 - u
-    {0x0e, 0x18, 0x0e}, // 118 - v
-    {0x1e, 0x1c, 0x1e}, // 119 - w
-    {0x12, 0x0c, 0x12}, // 120 - x
-    {0x06, 0x28, 0x1e}, // 121 - y
-    {0x1a, 0x1e, 0x16}, // 122 - z
-    {0x04, 0x1b, 0x11}, // 123 - braceleft
-    {0x00, 0x1b, 0x00}, // 124 - bar
-    {0x11, 0x1b, 0x04}, // 125 - braceright
-    {0x02, 0x03, 0x01}, // 126 - asciitilde
-    {0x00, 0x00, 0x00}, // 127 - empty
-    {0x00, 0x00, 0x00}, // 128 - empty
-    {0x00, 0x00, 0x00}, // 129 - empty
-    {0x00, 0x00, 0x00}, // 130 - empty
-    {0x00, 0x00, 0x00}, // 131 - empty
-    {0x00, 0x00, 0x00}, // 132 - empty
-    {0x00, 0x00, 0x00}, // 133 - empty
-    {0x00, 0x00, 0x00}, // 134 - empty
-    {0x00, 0x00, 0x00}, // 135 - empty
-    {0x00, 0x00, 0x00}, // 136 - empty
-    {0x00, 0x00, 0x00}, // 137 - empty
-    {0x00, 0x00, 0x00}, // 138 - empty
-    {0x00, 0x00, 0x00}, // 139 - empty
-    {0x00, 0x00, 0x00}, // 140 - empty
-    {0x00, 0x00, 0x00}, // 141 - empty
-    {0x00, 0x00, 0x00}, // 142 - empty
-    {0x00, 0x00, 0x00}, // 143 - empty
-    {0x00, 0x00, 0x00}, // 144 - empty
-    {0x00, 0x00, 0x00}, // 145 - empty
-    {0x00, 0x00, 0x00}, // 146 - empty
-    {0x00, 0x00, 0x00}, // 147 - empty
-    {0x00, 0x00, 0x00}, // 148 - empty
-    {0x00, 0x00, 0x00}, // 149 - empty
-    {0x00, 0x00, 0x00}, // 150 - empty
-    {0x00, 0x00, 0x00}, // 151 - empty
-    {0x00, 0x00, 0x00}, // 152 - empty
-    {0x00, 0x00, 0x00}, // 153 - empty
-    {0x00, 0x00, 0x00}, // 154 - empty
-    {0x00, 0x00, 0x00}, // 155 - empty
-    {0x00, 0x00, 0x00}, // 156 - empty
-    {0x00, 0x00, 0x00}, // 157 - empty
-    {0x00, 0x00, 0x00}, // 158 - empty
-    {0x00, 0x00, 0x00}, // 159 - empty
-    {0x00, 0x00, 0x00}, // 160 - empty
-    {0x00, 0x1d, 0x00}, // 161 - exclamdown
-    {0x0e, 0x1b, 0x0a}, // 162 - cent
-    {0x14, 0x1f, 0x15}, // 163 - sterling
-    {0x15, 0x0e, 0x15}, // 164 - currency
-    {0x0b, 0x1c, 0x0b}, // 165 - yen
-    {0x00, 0x1b, 0x00}, // 166 - brokenbar
-    {0x14, 0x1b, 0x05}, // 167 - section
-    {0x01, 0x00, 0x01}, // 168 - dieresis
-    {0x02, 0x05, 0x05}, // 169 - copyright
-    {0x16, 0x15, 0x17}, // 170 - ordfeminine
-    {0x02, 0x05, 0x00}, // 171 - guillemotleft
-    {0x02, 0x02, 0x06}, // 172 - logicalnot
-    {0x04, 0x04, 0x00}, // 173 - softhyphen
-    {0x07, 0x03, 0x04}, // 174 - registered
-    {0x01, 0x01, 0x01}, // 175 - macron
-    {0x02, 0x05, 0x02}, // 176 - degree
-    {0x12, 0x17, 0x12}, // 177 - plusminus
-    {0x01, 0x07, 0x04}, // 178 - twosuperior
-    {0x05, 0x07, 0x07}, // 179 - threesuperior
-    {0x00, 0x02, 0x01}, // 180 - acute
-    {0x1f, 0x08, 0x07}, // 181 - mu
-    {0x02, 0x1d, 0x1f}, // 182 - paragraph
-    {0x0e, 0x0e, 0x0e}, // 183 - periodcentered
-    {0x10, 0x14, 0x08}, // 184 - cedilla
-    {0x00, 0x07, 0x00}, // 185 - onesuperior
-    {0x12, 0x15, 0x12}, // 186 - ordmasculine
-    {0x00, 0x05, 0x02}, // 187 - guillemotright
-    {0x03, 0x08, 0x18}, // 188 - onequarter
-    {0x0b, 0x18, 0x10}, // 189 - onehalf
-    {0x03, 0x0b, 0x18}, // 190 - threequarters
-    {0x18, 0x15, 0x10}, // 191 - questiondown
-};
-
-#endif
-
 const uint8_t gFontSmall[95][6] =
 {
 	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00},    // ' '
@@ -502,10 +448,10 @@ const uint8_t gFontSmall[95][6] =
 		{0x00, 0x03, 0x07, 0x06, 0x00, 0x00},
 		{0x20, 0x76, 0x56, 0x56, 0x7E, 0x3C},
 		{0x7F, 0x7F, 0x6C, 0x6C, 0x7C, 0x38},
-		{0x3C, 0x7E, 0x66, 0x66, 0x66, 0x24},
+		{0x38, 0x7C, 0x6C, 0x6C, 0x6C, 0x00},
 		{0x38, 0x7C, 0x6C, 0x6C, 0x7F, 0x7F},
 		{0x3C, 0x7E, 0x56, 0x56, 0x5E, 0x0C},
-		{0x7C, 0x7E, 0x36, 0x36, 0x06, 0x00},
+		{0x7E, 0x7F, 0x1B, 0x1B, 0x02, 0x00},
 		{0x0C, 0x5E, 0x56, 0x56, 0x7E, 0x3C},
 		{0x7F, 0x7F, 0x0C, 0x0C, 0x7C, 0x78},
 		{0x00, 0x00, 0x7A, 0x7A, 0x00, 0x00},
@@ -516,7 +462,7 @@ const uint8_t gFontSmall[95][6] =
 		{0x7C, 0x7C, 0x0C, 0x0C, 0x7C, 0x78},
 		{0x3C, 0x7E, 0x66, 0x66, 0x7E, 0x3C},
 		{0x7E, 0x7E, 0x36, 0x36, 0x3E, 0x1C},
-		{0x1C, 0x3E, 0x36, 0x3E, 0x7E, 0x40},
+		{0x1C, 0x3E, 0x36, 0x7E, 0x7E, 0x60},
 		{0x7C, 0x7C, 0x0C, 0x0C, 0x18, 0x00},
 		{0x4C, 0x5E, 0x56, 0x56, 0x76, 0x20},
 		{0x3F, 0x7F, 0x6C, 0x6C, 0x60, 0x00},
@@ -524,11 +470,177 @@ const uint8_t gFontSmall[95][6] =
 		{0x0C, 0x3C, 0x70, 0x70, 0x3C, 0x0C},
 		{0x3C, 0x7C, 0x30, 0x30, 0x7C, 0x3C},
 		{0x44, 0x6C, 0x38, 0x38, 0x6C, 0x44},
-		{0x06, 0x6E, 0x6C, 0x6C, 0x7E, 0x3E},
+		{0x06, 0x6E, 0x68, 0x68, 0x7E, 0x3E},
 		{0x66, 0x76, 0x7E, 0x6E, 0x66, 0x00},
 		{0x08, 0x3E, 0x77, 0x41, 0x00, 0x00},
 		{0x00, 0x00, 0x7F, 0x00, 0x00, 0x00},
 		{0x00, 0x41, 0x77, 0x3E, 0x08, 0x00},
-		{0x0C, 0x06, 0x0C, 0x18, 0x0C, 0x00},
+		{0x0C, 0x06, 0x0C, 0x18, 0x0C, 0x00}
+	};
+#endif
+
+#ifdef ENABLE_SPECTRUM
+	const uint8_t gFont3x5[160][3] =
+	{
+		{0x00, 0x00, 0x00}, //  32 - space
+		{0x00, 0x17, 0x00}, //  33 - exclam
+		{0x03, 0x00, 0x03}, //  34 - quotedbl
+		{0x1f, 0x0a, 0x1f}, //  35 - numbersign
+		{0x0a, 0x1f, 0x05}, //  36 - dollar
+		{0x09, 0x04, 0x12}, //  37 - percent
+		{0x0f, 0x17, 0x1c}, //  38 - ampersand
+		{0x00, 0x03, 0x00}, //  39 - quotesingle
+		{0x00, 0x0e, 0x11}, //  40 - parenleft
+		{0x11, 0x0e, 0x00}, //  41 - parenright
+		{0x05, 0x02, 0x05}, //  42 - asterisk
+		{0x04, 0x0e, 0x04}, //  43 - plus
+		{0x10, 0x08, 0x00}, //  44 - comma
+		{0x04, 0x04, 0x04}, //  45 - hyphen
+		{0x00, 0x10, 0x00}, //  46 - period
+		{0x18, 0x04, 0x03}, //  47 - slash
+		{0x1e, 0x11, 0x0f}, //  48 - zero
+		{0x02, 0x1f, 0x00}, //  49 - one
+		{0x19, 0x15, 0x12}, //  50 - two
+		{0x11, 0x15, 0x0a}, //  51 - three
+		{0x07, 0x04, 0x1f}, //  52 - four
+		{0x17, 0x15, 0x09}, //  53 - five
+		{0x1e, 0x15, 0x1d}, //  54 - six
+		{0x19, 0x05, 0x03}, //  55 - seven
+		{0x1f, 0x15, 0x1f}, //  56 - eight
+		{0x17, 0x15, 0x0f}, //  57 - nine
+		{0x00, 0x0a, 0x00}, //  58 - colon
+		{0x10, 0x0a, 0x00}, //  59 - semicolon
+		{0x04, 0x0a, 0x11}, //  60 - less
+		{0x0a, 0x0a, 0x0a}, //  61 - equal
+		{0x11, 0x0a, 0x04}, //  62 - greater
+		{0x01, 0x15, 0x03}, //  63 - question
+		{0x0e, 0x15, 0x16}, //  64 - at
+		{0x1e, 0x05, 0x1e}, //  65 - A
+		{0x1f, 0x15, 0x0a}, //  66 - B
+		{0x0e, 0x11, 0x11}, //  67 - C
+		{0x1f, 0x11, 0x0e}, //  68 - D
+		{0x1f, 0x15, 0x15}, //  69 - E
+		{0x1f, 0x05, 0x05}, //  70 - F
+		{0x0e, 0x15, 0x1d}, //  71 - G
+		{0x1f, 0x04, 0x1f}, //  72 - H
+		{0x11, 0x1f, 0x11}, //  73 - I
+		{0x08, 0x10, 0x0f}, //  74 - J
+		{0x1f, 0x04, 0x1b}, //  75 - K
+		{0x1f, 0x10, 0x10}, //  76 - L
+		{0x1f, 0x06, 0x1f}, //  77 - M
+		{0x1f, 0x0e, 0x1f}, //  78 - N
+		{0x0e, 0x11, 0x0e}, //  79 - O
+		{0x1f, 0x05, 0x02}, //  80 - P
+		{0x0e, 0x19, 0x1e}, //  81 - Q
+		{0x1f, 0x0d, 0x16}, //  82 - R
+		{0x12, 0x15, 0x09}, //  83 - S
+		{0x01, 0x1f, 0x01}, //  84 - T
+		{0x0f, 0x10, 0x1f}, //  85 - U
+		{0x07, 0x18, 0x07}, //  86 - V
+		{0x1f, 0x0c, 0x1f}, //  87 - W
+		{0x1b, 0x04, 0x1b}, //  88 - X
+		{0x03, 0x1c, 0x03}, //  89 - Y
+		{0x19, 0x15, 0x13}, //  90 - Z
+		{0x1f, 0x11, 0x11}, //  91 - bracketleft
+		{0x02, 0x04, 0x08}, //  92 - backslash
+		{0x11, 0x11, 0x1f}, //  93 - bracketright
+		{0x02, 0x01, 0x02}, //  94 - asciicircum
+		{0x10, 0x10, 0x10}, //  95 - underscore
+		{0x01, 0x02, 0x00}, //  96 - grave
+		{0x1a, 0x16, 0x1c}, //  97 - a
+		{0x1f, 0x12, 0x0c}, //  98 - b
+		{0x0c, 0x12, 0x12}, //  99 - c
+		{0x0c, 0x12, 0x1f}, // 100 - d
+		{0x0c, 0x1a, 0x16}, // 101 - e
+		{0x04, 0x1e, 0x05}, // 102 - f
+		{0x0c, 0x2a, 0x1e}, // 103 - g
+		{0x1f, 0x02, 0x1c}, // 104 - h
+		{0x00, 0x1d, 0x00}, // 105 - i
+		{0x10, 0x20, 0x1d}, // 106 - j
+		{0x1f, 0x0c, 0x12}, // 107 - k
+		{0x11, 0x1f, 0x10}, // 108 - l
+		{0x1e, 0x0e, 0x1e}, // 109 - m
+		{0x1e, 0x02, 0x1c}, // 110 - n
+		{0x0c, 0x12, 0x0c}, // 111 - o
+		{0x3e, 0x12, 0x0c}, // 112 - p
+		{0x0c, 0x12, 0x3e}, // 113 - q
+		{0x1c, 0x02, 0x02}, // 114 - r
+		{0x14, 0x1e, 0x0a}, // 115 - s
+		{0x02, 0x1f, 0x12}, // 116 - t
+		{0x0e, 0x10, 0x1e}, // 117 - u
+		{0x0e, 0x18, 0x0e}, // 118 - v
+		{0x1e, 0x1c, 0x1e}, // 119 - w
+		{0x12, 0x0c, 0x12}, // 120 - x
+		{0x06, 0x28, 0x1e}, // 121 - y
+		{0x1a, 0x1e, 0x16}, // 122 - z
+		{0x04, 0x1b, 0x11}, // 123 - braceleft
+		{0x00, 0x1b, 0x00}, // 124 - bar
+		{0x11, 0x1b, 0x04}, // 125 - braceright
+		{0x02, 0x03, 0x01}, // 126 - asciitilde
+		{0x00, 0x00, 0x00}, // 127 - empty
+		{0x00, 0x00, 0x00}, // 128 - empty
+		{0x00, 0x00, 0x00}, // 129 - empty
+		{0x00, 0x00, 0x00}, // 130 - empty
+		{0x00, 0x00, 0x00}, // 131 - empty
+		{0x00, 0x00, 0x00}, // 132 - empty
+		{0x00, 0x00, 0x00}, // 133 - empty
+		{0x00, 0x00, 0x00}, // 134 - empty
+		{0x00, 0x00, 0x00}, // 135 - empty
+		{0x00, 0x00, 0x00}, // 136 - empty
+		{0x00, 0x00, 0x00}, // 137 - empty
+		{0x00, 0x00, 0x00}, // 138 - empty
+		{0x00, 0x00, 0x00}, // 139 - empty
+		{0x00, 0x00, 0x00}, // 140 - empty
+		{0x00, 0x00, 0x00}, // 141 - empty
+		{0x00, 0x00, 0x00}, // 142 - empty
+		{0x00, 0x00, 0x00}, // 143 - empty
+		{0x00, 0x00, 0x00}, // 144 - empty
+		{0x00, 0x00, 0x00}, // 145 - empty
+		{0x00, 0x00, 0x00}, // 146 - empty
+		{0x00, 0x00, 0x00}, // 147 - empty
+		{0x00, 0x00, 0x00}, // 148 - empty
+		{0x00, 0x00, 0x00}, // 149 - empty
+		{0x00, 0x00, 0x00}, // 150 - empty
+		{0x00, 0x00, 0x00}, // 151 - empty
+		{0x00, 0x00, 0x00}, // 152 - empty
+		{0x00, 0x00, 0x00}, // 153 - empty
+		{0x00, 0x00, 0x00}, // 154 - empty
+		{0x00, 0x00, 0x00}, // 155 - empty
+		{0x00, 0x00, 0x00}, // 156 - empty
+		{0x00, 0x00, 0x00}, // 157 - empty
+		{0x00, 0x00, 0x00}, // 158 - empty
+		{0x00, 0x00, 0x00}, // 159 - empty
+		{0x00, 0x00, 0x00}, // 160 - empty
+		{0x00, 0x1d, 0x00}, // 161 - exclamdown
+		{0x0e, 0x1b, 0x0a}, // 162 - cent
+		{0x14, 0x1f, 0x15}, // 163 - sterling
+		{0x15, 0x0e, 0x15}, // 164 - currency
+		{0x0b, 0x1c, 0x0b}, // 165 - yen
+		{0x00, 0x1b, 0x00}, // 166 - brokenbar
+		{0x14, 0x1b, 0x05}, // 167 - section
+		{0x01, 0x00, 0x01}, // 168 - dieresis
+		{0x02, 0x05, 0x05}, // 169 - copyright
+		{0x16, 0x15, 0x17}, // 170 - ordfeminine
+		{0x02, 0x05, 0x00}, // 171 - guillemotleft
+		{0x02, 0x02, 0x06}, // 172 - logicalnot
+		{0x04, 0x04, 0x00}, // 173 - softhyphen
+		{0x07, 0x03, 0x04}, // 174 - registered
+		{0x01, 0x01, 0x01}, // 175 - macron
+		{0x02, 0x05, 0x02}, // 176 - degree
+		{0x12, 0x17, 0x12}, // 177 - plusminus
+		{0x01, 0x07, 0x04}, // 178 - twosuperior
+		{0x05, 0x07, 0x07}, // 179 - threesuperior
+		{0x00, 0x02, 0x01}, // 180 - acute
+		{0x1f, 0x08, 0x07}, // 181 - mu
+		{0x02, 0x1d, 0x1f}, // 182 - paragraph
+		{0x0e, 0x0e, 0x0e}, // 183 - periodcentered
+		{0x10, 0x14, 0x08}, // 184 - cedilla
+		{0x00, 0x07, 0x00}, // 185 - onesuperior
+		{0x12, 0x15, 0x12}, // 186 - ordmasculine
+		{0x00, 0x05, 0x02}, // 187 - guillemotright
+		{0x03, 0x08, 0x18}, // 188 - onequarter
+		{0x0b, 0x18, 0x10}, // 189 - onehalf
+		{0x03, 0x0b, 0x18}, // 190 - threequarters
+		{0x18, 0x15, 0x10}, // 191 - questiondown
 	};
 #endif
--- a/functions.c
+++ b/functions.c
@@ -22,6 +22,7 @@
 #endif
 #include "bsp/dp32g030/gpio.h"
 #include "dcs.h"
+#include "driver/backlight.h"
 #if defined(ENABLE_FMRADIO)
 	#include "driver/bk1080.h"
 #endif
@@ -60,7 +61,10 @@ void FUNCTION_Init(void)
 	g_CDCSS_Lost       = false;
 	g_CTCSS_Lost       = false;

-	g_VOX_Lost         = false;
+	#ifdef ENABLE_VOX
+		g_VOX_Lost     = false;
+	#endif
+
 	g_SquelchLost      = false;

 	gFlagTailNoteEliminationComplete   = false;
@@ -112,8 +116,12 @@ void FUNCTION_Select(FUNCTION_Type_t Function)
 					gFM_RestoreCountdown_10ms = fm_restore_countdown_10ms;
 			#endif

-			if (gDTMF_CallState == DTMF_CALL_STATE_CALL_OUT || gDTMF_CallState == DTMF_CALL_STATE_RECEIVED)
-				gDTMF_AUTO_RESET_TIME = 1 + (gEeprom.DTMF_AUTO_RESET_TIME * 2);
+			if (gDTMF_CallState == DTMF_CALL_STATE_CALL_OUT ||
+			    gDTMF_CallState == DTMF_CALL_STATE_RECEIVED ||
+				gDTMF_CallState == DTMF_CALL_STATE_RECEIVED_STAY)
+			{
+				gDTMF_auto_reset_time_500ms = gEeprom.DTMF_auto_reset_time * 2;
+			}

 			gUpdateStatus = true;
 			return;
@@ -200,6 +208,9 @@ void FUNCTION_Select(FUNCTION_Type_t Function)

 			DTMF_Reply();

+			if (gCurrentVfo->DTMF_PTT_ID_TX_MODE == PTT_ID_APOLLO)
+				BK4819_PlaySingleTone(2525, 250, 0, gEeprom.DTMF_SIDE_TONE);
+
 			#if defined(ENABLE_ALARM) || defined(ENABLE_TX1750)
 				if (gAlarmState != ALARM_STATE_OFF)
 				{
@@ -226,6 +237,9 @@ void FUNCTION_Select(FUNCTION_Type_t Function)
 			else
 				BK4819_DisableScramble();

+			if (gSetting_backlight_on_tx_rx == 1 || gSetting_backlight_on_tx_rx == 3)
+				BACKLIGHT_TurnOn();
+
 			break;

 		case FUNCTION_BAND_SCOPE:
--- a/helper/boot.c
+++ b/helper/boot.c
@@ -75,7 +75,9 @@ void BOOT_ProcessMode(BOOT_Mode_t Mode)
 		{
 			gEeprom.DUAL_WATCH               = DUAL_WATCH_OFF;
 			gEeprom.BATTERY_SAVE             = 0;
-			gEeprom.VOX_SWITCH               = false;
+			#ifdef ENABLE_VOX
+				gEeprom.VOX_SWITCH           = false;
+			#endif
 			gEeprom.CROSS_BAND_RX_TX         = CROSS_BAND_OFF;
 			gEeprom.AUTO_KEYPAD_LOCK         = false;
 			gEeprom.KEY_1_SHORT_PRESS_ACTION = ACTION_OPT_NONE;
--- a/images/AM_fix.mp4
+++ b/images/AM_fix.mp4
--- a/images/image1.png
+++ b/images/image1.png
--- a/images/image2.png
+++ b/images/image2.png
--- a/images/image3.png
+++ b/images/image3.png
--- a/init.c
+++ b/init.c
@@ -30,21 +30,17 @@ void DATA_Init(void);
 void BSS_Init(void)
 {
 	uint32_t *pBss;
-
-	for (pBss = __bss_start__; pBss < __bss_end__; pBss++) {
+	for (pBss = __bss_start__; pBss < __bss_end__; pBss++)
 		*pBss = 0;
-	}
 }

 void DATA_Init(void)
 {
-	volatile uint32_t *pDataRam = (volatile uint32_t *)sram_data_start;
+	volatile uint32_t *pDataRam   = (volatile uint32_t *)sram_data_start;
 	volatile uint32_t *pDataFlash = (volatile uint32_t *)flash_data_start;
-	uint32_t Size = (uint32_t)sram_data_end - (uint32_t)sram_data_start;
-	uint32_t i;
+	uint32_t           Size       = (uint32_t)sram_data_end - (uint32_t)sram_data_start;
+	unsigned int i;

-	for (i = 0; i < Size / 4; i++) {
+	for (i = 0; i < (Size / 4); i++)
 		*pDataRam++ = *pDataFlash++;
-	}
 }
-
--- a/main.c
+++ b/main.c
@@ -174,12 +174,14 @@ void Main(void)
 			}
 		}

-		if (gEeprom.POWER_ON_PASSWORD < 1000000)
-		{
-			bIsInLockScreen = true;
-			UI_DisplayLock();
-			bIsInLockScreen = false;
-		}
+		#ifdef ENABLE_PWRON_PASSWORD
+			if (gEeprom.POWER_ON_PASSWORD < 1000000)
+			{
+				bIsInLockScreen = true;
+				UI_DisplayLock();
+				bIsInLockScreen = false;
+			}
+		#endif

 		BOOT_ProcessMode(BootMode);

@@ -193,7 +195,7 @@ void Main(void)

 			AUDIO_SetVoiceID(0, VOICE_ID_WELCOME);

-			Channel = gEeprom.ScreenChannel[gEeprom.TX_CHANNEL];
+			Channel = gEeprom.ScreenChannel[gEeprom.TX_VFO];
 			if (IS_MR_CHANNEL(Channel))
 			{
 				AUDIO_SetVoiceID(1, VOICE_ID_CHANNEL_MODE);
--- a/misc.c
+++ b/misc.c
@@ -17,6 +17,7 @@
 #include <string.h>

 #include "misc.h"
+#include "settings.h"

 const uint8_t     fm_resume_countdown_500ms        =  2500 / 500;  // 2.5 seconds
 const uint8_t     fm_radio_countdown_500ms         =  2000 / 500;  // 2 seconds
@@ -45,7 +46,9 @@ const uint16_t    dual_watch_count_after_rx_10ms   =  1000 / 10;   // 1 sec afte
 const uint16_t    dual_watch_count_after_1_10ms    =  5000 / 10;   // 5 sec
 const uint16_t    dual_watch_count_after_2_10ms    =  3600 / 10;   // 3.6 sec
 const uint16_t    dual_watch_count_noaa_10ms       =    70 / 10;   // 70ms
-const uint16_t    dual_watch_count_after_vox_10ms  =   200 / 10;   // 200ms
+#ifdef ENABLE_VOX
+	const uint16_t dual_watch_count_after_vox_10ms  =   200 / 10;   // 200ms
+#endif
 const uint16_t    dual_watch_count_toggle_10ms     =   100 / 10;   // 100ms between VFO toggles

 const uint16_t    scan_pause_delay_in_1_10ms       =  5000 / 10;   // 5 seconds
@@ -61,7 +64,9 @@ const uint16_t    battery_save_count_10ms          = 10000 / 10;   // 10 seconds
 const uint16_t    power_save1_10ms                 =   100 / 10;   // 100ms
 const uint16_t    power_save2_10ms                 =   200 / 10;   // 200ms

-const uint16_t    vox_stop_count_down_10ms         =  1000 / 10;   // 1 second
+#ifdef ENABLE_VOX
+	const uint16_t    vox_stop_count_down_10ms         =  1000 / 10;   // 1 second
+#endif

 const uint16_t    NOAA_countdown_10ms              =  5000 / 10;   // 5 seconds
 const uint16_t    NOAA_countdown_2_10ms            =   500 / 10;   // 500ms
@@ -83,7 +88,7 @@ bool              gSetting_TX_EN;
 uint8_t           gSetting_F_LOCK;
 bool              gSetting_ScrambleEnable;

-bool              gSetting_backlight_on_rx;
+uint8_t           gSetting_backlight_on_tx_rx;

 #ifdef ENABLE_AM_FIX
 	bool          gSetting_AM_fix;
@@ -188,12 +193,14 @@ bool              g_CDCSS_Lost;
 uint8_t           gCDCSSCodeType;
 bool              g_CTCSS_Lost;
 bool              g_CxCSS_TAIL_Found;
-bool              g_VOX_Lost;
+#ifdef ENABLE_VOX
+	bool          g_VOX_Lost;
+	bool          gVOX_NoiseDetected;
+	uint16_t      gVoxResumeCountdown;
+	uint16_t      gVoxPauseCountdown;
+#endif
 bool              g_SquelchLost;
 uint8_t           gFlashLightState;
-bool              gVOX_NoiseDetected;
-uint16_t          gVoxResumeCountdown;
-uint16_t          gVoxPauseCountdown;
 volatile uint16_t gFlashLightBlinkCounter;
 bool              gFlagEndTransmission;
 uint16_t          gLowBatteryCountdown;
@@ -213,7 +220,7 @@ bool              gKeyBeingHeld;
 bool              gPttIsPressed;
 uint8_t           gPttDebounceCounter;
 uint8_t           gMenuListCount;
-uint8_t           gBackupCROSS_BAND_RX_TX;
+uint8_t           gBackup_CROSS_BAND_RX_TX;
 uint8_t           gScanDelay_10ms;
 #ifdef ENABLE_AIRCOPY
 	uint8_t       gAircopySendCountdown;
@@ -234,7 +241,9 @@ uint8_t           gShowChPrefix;
 volatile bool     gNextTimeslice;
 volatile uint8_t  gFoundCDCSSCountdown_10ms;
 volatile uint8_t  gFoundCTCSSCountdown_10ms;
-volatile uint16_t gVoxStopCountdown_10ms;
+#ifdef ENABLE_VOX
+	volatile uint16_t gVoxStopCountdown_10ms;
+#endif
 volatile bool     gNextTimeslice40ms;
 #ifdef ENABLE_NOAA
 	volatile uint16_t gNOAACountdown_10ms = 0;
@@ -251,7 +260,39 @@ int16_t           gCurrentRSSI[2] = {0, 0};  // now one per VFO

 uint8_t           gIsLocked = 0xFF;

-// --------
+unsigned int get_rx_VFO(void)
+{
+	unsigned int rx_vfo = gEeprom.TX_VFO;
+	if (gEeprom.CROSS_BAND_RX_TX == CROSS_BAND_CHAN_B)
+		rx_vfo = 0;
+	else
+	if (gEeprom.CROSS_BAND_RX_TX == CROSS_BAND_CHAN_A)
+		rx_vfo = 1;
+	else
+	if (gEeprom.DUAL_WATCH == DUAL_WATCH_CHAN_B)
+		rx_vfo = 1;
+	else
+	if (gEeprom.DUAL_WATCH == DUAL_WATCH_CHAN_A)
+		rx_vfo = 0;
+	return rx_vfo;
+}
+
+unsigned int get_tx_VFO(void)
+{
+	unsigned int tx_vfo = gEeprom.TX_VFO;
+	if (gEeprom.CROSS_BAND_RX_TX == CROSS_BAND_CHAN_B)
+		tx_vfo = 1;
+	else
+	if (gEeprom.CROSS_BAND_RX_TX == CROSS_BAND_CHAN_A)
+		tx_vfo = 0;
+	else
+	if (gEeprom.DUAL_WATCH == DUAL_WATCH_CHAN_B)
+		tx_vfo = 1;
+	else
+	if (gEeprom.DUAL_WATCH == DUAL_WATCH_CHAN_A)
+		tx_vfo = 0;
+	return tx_vfo;
+}

 void NUMBER_Get(char *pDigits, uint32_t *pInteger)
 {
--- a/misc.h
+++ b/misc.h
@@ -24,24 +24,28 @@
 	#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
 #endif

-#define IS_MR_CHANNEL(x)           ((x) >= MR_CHANNEL_FIRST   && (x) <= MR_CHANNEL_LAST)
-#define IS_FREQ_CHANNEL(x)         ((x) >= FREQ_CHANNEL_FIRST && (x) <= FREQ_CHANNEL_LAST)
-#define IS_VALID_CHANNEL(x)        ((x) < LAST_CHANNEL)
-
-#ifdef ENABLE_NOAA
-	#define IS_NOAA_CHANNEL(x)     ((x) >= NOAA_CHANNEL_FIRST && (x) <= NOAA_CHANNEL_LAST)
-	#define IS_NOT_NOAA_CHANNEL(x) ((x) >= MR_CHANNEL_FIRST   && (x) <= FREQ_CHANNEL_LAST)
+#ifndef MAX
+	#define MAX(a, b) ({ __typeof__ (a) _a = (a); __typeof__ (b) _b = (b); _a > _b ? _a : _b; })
 #endif

+#ifndef MIN
+	#define MIN(a, b) ({ __typeof__ (a) _a = (a); __typeof__ (b) _b = (b); _a < _b ? _a : _b; })
+#endif
+
+#define IS_MR_CHANNEL(x)       ((x) >= MR_CHANNEL_FIRST   && (x) <= MR_CHANNEL_LAST)
+#define IS_FREQ_CHANNEL(x)     ((x) >= FREQ_CHANNEL_FIRST && (x) <= FREQ_CHANNEL_LAST)
+#define IS_VALID_CHANNEL(x)    ((x) < LAST_CHANNEL)
+
+#define IS_NOAA_CHANNEL(x)     ((x) >= NOAA_CHANNEL_FIRST && (x) <= NOAA_CHANNEL_LAST)
+#define IS_NOT_NOAA_CHANNEL(x) ((x) >= MR_CHANNEL_FIRST   && (x) <= FREQ_CHANNEL_LAST)
+
 enum {
 	MR_CHANNEL_FIRST   = 0,
 	MR_CHANNEL_LAST    = 199u,
 	FREQ_CHANNEL_FIRST = 200u,
 	FREQ_CHANNEL_LAST  = 206u,
-	#ifdef ENABLE_NOAA
-		NOAA_CHANNEL_FIRST = 207u,
-		NOAA_CHANNEL_LAST  = 216u,
-	#endif
+	NOAA_CHANNEL_FIRST = 207u,
+	NOAA_CHANNEL_LAST  = 216u,
 	LAST_CHANNEL
 };

@@ -116,7 +120,9 @@ extern const uint16_t        battery_save_count_10ms;
 extern const uint16_t        power_save1_10ms;
 extern const uint16_t        power_save2_10ms;

-extern const uint16_t        vox_stop_count_down_10ms;
+#ifdef ENABLE_VOX
+	extern const uint16_t    vox_stop_count_down_10ms;
+#endif

 extern const uint16_t        NOAA_countdown_10ms;
 extern const uint16_t        NOAA_countdown_2_10ms;
@@ -128,7 +134,9 @@ extern const uint16_t        dual_watch_count_after_1_10ms;
 extern const uint16_t        dual_watch_count_after_2_10ms;
 extern const uint16_t        dual_watch_count_toggle_10ms;
 extern const uint16_t        dual_watch_count_noaa_10ms;
-extern const uint16_t        dual_watch_count_after_vox_10ms;
+#ifdef ENABLE_VOX
+	extern const uint16_t    dual_watch_count_after_vox_10ms;
+#endif

 extern const uint16_t        scan_pause_delay_in_1_10ms;
 extern const uint16_t        scan_pause_delay_in_2_10ms;
@@ -152,7 +160,7 @@ extern bool                  gSetting_TX_EN;
 extern uint8_t               gSetting_F_LOCK;
 extern bool                  gSetting_ScrambleEnable;

-extern bool                  gSetting_backlight_on_rx;
+extern uint8_t               gSetting_backlight_on_tx_rx;

 #ifdef ENABLE_AM_FIX
 	extern bool              gSetting_AM_fix;
@@ -258,12 +266,14 @@ extern bool                  g_CDCSS_Lost;
 extern uint8_t               gCDCSSCodeType;
 extern bool                  g_CTCSS_Lost;
 extern bool                  g_CxCSS_TAIL_Found;
-extern bool                  g_VOX_Lost;
+#ifdef ENABLE_VOX
+	extern bool              g_VOX_Lost;
+	extern bool              gVOX_NoiseDetected;
+	extern uint16_t          gVoxResumeCountdown;
+	extern uint16_t          gVoxPauseCountdown;
+#endif
 extern bool                  g_SquelchLost;
 extern uint8_t               gFlashLightState;
-extern bool                  gVOX_NoiseDetected;
-extern uint16_t              gVoxResumeCountdown;
-extern uint16_t              gVoxPauseCountdown;
 extern volatile uint16_t     gFlashLightBlinkCounter;
 extern bool                  gFlagEndTransmission;
 extern uint16_t              gLowBatteryCountdown;
@@ -281,7 +291,7 @@ extern bool                  gKeyBeingHeld;
 extern bool                  gPttIsPressed;
 extern uint8_t               gPttDebounceCounter;
 extern uint8_t               gMenuListCount;
-extern uint8_t               gBackupCROSS_BAND_RX_TX;
+extern uint8_t               gBackup_CROSS_BAND_RX_TX;
 extern uint8_t               gScanDelay_10ms;
 #ifdef ENABLE_AIRCOPY
 	extern uint8_t           gAircopySendCountdown;
@@ -300,7 +310,9 @@ extern bool                  gF_LOCK;
 extern uint8_t               gShowChPrefix;
 extern volatile uint8_t      gFoundCDCSSCountdown_10ms;
 extern volatile uint8_t      gFoundCTCSSCountdown_10ms;
-extern volatile uint16_t     gVoxStopCountdown_10ms;
+#ifdef ENABLE_VOX
+	extern volatile uint16_t gVoxStopCountdown_10ms;
+#endif
 extern volatile bool         gNextTimeslice40ms;
 #ifdef ENABLE_NOAA
 	extern volatile uint16_t gNOAACountdown_10ms;
@@ -314,6 +326,9 @@ extern int16_t               gCurrentRSSI[2];   // now one per VFO
 extern uint8_t               gIsLocked;
 extern volatile uint8_t      boot_counter_10ms;

+unsigned int get_tx_VFO(void);
+unsigned int get_rx_VFO(void);
+
 void    NUMBER_Get(char *pDigits, uint32_t *pInteger);
 void    NUMBER_ToDigits(uint32_t Value, char *pDigits);
 int32_t NUMBER_AddWithWraparound(int32_t Base, int32_t Add, int32_t LowerLimit, int32_t UpperLimit);
--- a/radio.c
+++ b/radio.c
@@ -51,7 +51,7 @@ bool RADIO_CheckValidChannel(uint16_t Channel, bool bCheckScanList, uint8_t VFO)
 	uint8_t PriorityCh1;
 	uint8_t PriorityCh2;

-	if (!IS_MR_CHANNEL(Channel))
+	if (Channel > MR_CHANNEL_LAST)
 		return false;

 	Attributes = gMR_ChannelAttributes[Channel];
@@ -130,9 +130,7 @@ void RADIO_InitInfo(VFO_Info_t *pInfo, const uint8_t ChannelSave, const uint32_t
 	pInfo->freq_config_TX.Frequency = Frequency;
 	pInfo->pRX                      = &pInfo->freq_config_RX;
 	pInfo->pTX                      = &pInfo->freq_config_TX;
-	#ifdef ENABLE_COMPANDER
-		pInfo->Compander            = 0;  // off
-	#endif
+	pInfo->Compander                = 0;  // off

 	if (ChannelSave == (FREQ_CHANNEL_FIRST + BAND2_108MHz))
 		pInfo->AM_mode = 1;
@@ -178,7 +176,7 @@ void RADIO_ConfigureChannel(const unsigned int VFO, const unsigned int configure
 			}
 		#endif

-		if (IS_MR_CHANNEL(Channel))
+		if (Channel <= MR_CHANNEL_LAST)
 		{
 			Channel = RADIO_FindNextChannel(Channel, RADIO_CHANNEL_UP, false, VFO);
 			if (Channel == 0xFF)
@@ -202,7 +200,7 @@ void RADIO_ConfigureChannel(const unsigned int VFO, const unsigned int configure

 		uint8_t Index;

-		if (IS_MR_CHANNEL(Channel))
+		if (Channel <= MR_CHANNEL_LAST)
 		{
 			Channel                    = gEeprom.FreqChannel[VFO];
 			gEeprom.ScreenChannel[VFO] = gEeprom.FreqChannel[VFO];
@@ -220,7 +218,7 @@ void RADIO_ConfigureChannel(const unsigned int VFO, const unsigned int configure
 		Band = BAND6_400MHz;
 	}

-	if (IS_MR_CHANNEL(Channel))
+	if (Channel <= MR_CHANNEL_LAST)
 	{
 		gEeprom.VfoInfo[VFO].Band                    = Band;
 		gEeprom.VfoInfo[VFO].SCANLIST1_PARTICIPATION = !!(Attributes & MR_CH_SCANLIST1);
@@ -237,7 +235,7 @@ void RADIO_ConfigureChannel(const unsigned int VFO, const unsigned int configure
 	gEeprom.VfoInfo[VFO].SCANLIST2_PARTICIPATION = bParticipation2;
 	gEeprom.VfoInfo[VFO].CHANNEL_SAVE            = Channel;

-	if (IS_MR_CHANNEL(Channel))
+	if (Channel <= MR_CHANNEL_LAST)
 		Base = Channel * 16;
 	else
 		Base = 0x0C80 + ((Channel - FREQ_CHANNEL_FIRST) * 32) + (VFO * 16);
@@ -334,12 +332,12 @@ void RADIO_ConfigureChannel(const unsigned int VFO, const unsigned int configure
 		if (Data[5] == 0xFF)
 		{
 			gEeprom.VfoInfo[VFO].DTMF_DECODING_ENABLE = false;
-			gEeprom.VfoInfo[VFO].DTMF_PTT_ID_TX_MODE  = 0;
+			gEeprom.VfoInfo[VFO].DTMF_PTT_ID_TX_MODE  = PTT_ID_OFF;
 		}
 		else
 		{
-			gEeprom.VfoInfo[VFO].DTMF_DECODING_ENABLE = !!((Data[5] >> 0) & 1u);
-			gEeprom.VfoInfo[VFO].DTMF_PTT_ID_TX_MODE  =   ((Data[5] >> 1) & 3u);
+			gEeprom.VfoInfo[VFO].DTMF_DECODING_ENABLE = ((Data[5] >> 0) & 1u) ? true : false;
+			gEeprom.VfoInfo[VFO].DTMF_PTT_ID_TX_MODE  = ((Data[5] >> 1) & 7u);
 		}

 		// ***************
@@ -382,13 +380,13 @@ void RADIO_ConfigureChannel(const unsigned int VFO, const unsigned int configure
 	if (Frequency >= 10800000 && Frequency < 13600000)
 		gEeprom.VfoInfo[VFO].TX_OFFSET_FREQUENCY_DIRECTION = TX_OFFSET_FREQUENCY_DIRECTION_OFF;
 	else
-	if (!IS_MR_CHANNEL(Channel))
+	if (Channel > MR_CHANNEL_LAST)
 		gEeprom.VfoInfo[VFO].TX_OFFSET_FREQUENCY = FREQUENCY_FloorToStep(gEeprom.VfoInfo[VFO].TX_OFFSET_FREQUENCY, gEeprom.VfoInfo[VFO].StepFrequency, 0);

 	RADIO_ApplyOffset(pRadio);

 	memset(gEeprom.VfoInfo[VFO].Name, 0, sizeof(gEeprom.VfoInfo[VFO].Name));
-	if (IS_MR_CHANNEL(Channel))
+	if (Channel < MR_CHANNEL_LAST)
 	{	// 16 bytes allocated to the channel name but only 10 used, the rest are 0's
 		EEPROM_ReadBuffer(0x0F50 + (Channel * 16), gEeprom.VfoInfo[VFO].Name + 0, 8);
 		EEPROM_ReadBuffer(0x0F58 + (Channel * 16), gEeprom.VfoInfo[VFO].Name + 8, 2);
@@ -420,9 +418,7 @@ void RADIO_ConfigureChannel(const unsigned int VFO, const unsigned int configure
 		gEeprom.VfoInfo[VFO].freq_config_TX.CodeType = CODE_TYPE_OFF;
 	}

-	#ifdef ENABLE_COMPANDER
-		gEeprom.VfoInfo[VFO].Compander = (Attributes & MR_CH_COMPAND) >> 4;
-	#endif
+	gEeprom.VfoInfo[VFO].Compander = (Attributes & MR_CH_COMPAND) >> 4;

 	RADIO_ConfigureSquelchAndOutputPower(pRadio);
 }
@@ -430,22 +426,27 @@ void RADIO_ConfigureChannel(const unsigned int VFO, const unsigned int configure
 void RADIO_ConfigureSquelchAndOutputPower(VFO_Info_t *pInfo)
 {
 	uint8_t          Txp[3];
-	FREQUENCY_Band_t Band = FREQUENCY_GetBand(pInfo->pRX->Frequency);
-	uint16_t         Base = (Band < BAND4_174MHz) ? 0x1E60 : 0x1E00;
+	FREQUENCY_Band_t Band;
+
+	// *******************************
+	// squelch
+	
+	Band = FREQUENCY_GetBand(pInfo->pRX->Frequency);
+	uint16_t Base = (Band < BAND4_174MHz) ? 0x1E60 : 0x1E00;

 	if (gEeprom.SQUELCH_LEVEL == 0)
 	{	// squelch == 0 (off)
-		pInfo->SquelchOpenRSSIThresh    = 0;
-		pInfo->SquelchOpenNoiseThresh   = 127;
-		pInfo->SquelchCloseGlitchThresh = 255;
+		pInfo->SquelchOpenRSSIThresh    = 0;     // 0 ~ 255
+		pInfo->SquelchOpenNoiseThresh   = 127;   // 127 ~ 0
+		pInfo->SquelchCloseGlitchThresh = 255;   // 255 ~ 0

-		pInfo->SquelchCloseRSSIThresh   = 0;
-		pInfo->SquelchCloseNoiseThresh  = 127;
-		pInfo->SquelchOpenGlitchThresh  = 255;
+		pInfo->SquelchCloseRSSIThresh   = 0;     // 0 ~ 255
+		pInfo->SquelchCloseNoiseThresh  = 127;   // 127 ~ 0
+		pInfo->SquelchOpenGlitchThresh  = 255;   // 255 ~ 0
 	}
 	else
 	{	// squelch >= 1
-		Base += gEeprom.SQUELCH_LEVEL;                                        // my squelch-1
+		Base += gEeprom.SQUELCH_LEVEL;                                        // my eeprom squelch-1
 																			  // VHF   UHF
 		EEPROM_ReadBuffer(Base + 0x00, &pInfo->SquelchOpenRSSIThresh,    1);  //  50    10
 		EEPROM_ReadBuffer(Base + 0x10, &pInfo->SquelchCloseRSSIThresh,   1);  //  40     5
@@ -456,30 +457,61 @@ void RADIO_ConfigureSquelchAndOutputPower(VFO_Info_t *pInfo)
 		EEPROM_ReadBuffer(Base + 0x40, &pInfo->SquelchCloseGlitchThresh, 1);  //  90    90
 		EEPROM_ReadBuffer(Base + 0x50, &pInfo->SquelchOpenGlitchThresh,  1);  // 100   100

+		uint16_t rssi_open    = pInfo->SquelchOpenRSSIThresh;
+		uint16_t rssi_close   = pInfo->SquelchCloseRSSIThresh;
+		uint16_t noise_open   = pInfo->SquelchOpenNoiseThresh;
+		uint16_t noise_close  = pInfo->SquelchCloseNoiseThresh;
+		uint16_t glitch_open  = pInfo->SquelchOpenGlitchThresh;
+		uint16_t glitch_close = pInfo->SquelchCloseGlitchThresh;
+
 		#if ENABLE_SQUELCH_MORE_SENSITIVE
 			// make squelch a little more sensitive
 			//
 			// getting the best setting here is still experimental, bare with me
 			//
-			// note that 'noise' and 'glitch' value are inverted compared to 'rssi' values
+			// note that 'noise' and 'glitch' values are inverted compared to 'rssi' values

-			pInfo->SquelchOpenRSSIThresh    = ((uint16_t)pInfo->SquelchOpenRSSIThresh   * 10) / 11;
-			pInfo->SquelchCloseRSSIThresh   = ((uint16_t)pInfo->SquelchOpenRSSIThresh   * 10) / 11;
+			#if 0
+				rssi_open   = (rssi_open   * 8) / 9;
+				noise_open  = (noise_open  * 9) / 8;
+				glitch_open = (glitch_open * 9) / 8;
+			#else
+				// even more sensitive .. use when RX bandwidths are fixed (no weak signal auto adjust)
+				rssi_open   = (rssi_open   * 1) / 2;
+				noise_open  = (noise_open  * 2) / 1;
+				glitch_open = (glitch_open * 2) / 1;
+			#endif

-			pInfo->SquelchOpenNoiseThresh   = ((uint16_t)pInfo->SquelchOpenNoiseThresh  * 11) / 10;
-			pInfo->SquelchCloseNoiseThresh  = ((uint16_t)pInfo->SquelchOpenNoiseThresh  * 11) / 10;
-
-			pInfo->SquelchOpenGlitchThresh  = ((uint16_t)pInfo->SquelchOpenGlitchThresh * 11) / 10;
-			pInfo->SquelchCloseGlitchThresh = ((uint16_t)pInfo->SquelchOpenGlitchThresh * 11) / 10;
+		#else
+			// more sensitive .. use when RX bandwidths are fixed (no weak signal auto adjust)
+			rssi_open   = (rssi_open   * 3) / 4;
+			noise_open  = (noise_open  * 4) / 3;
+			glitch_open = (glitch_open * 4) / 3;
 		#endif

-		if (pInfo->SquelchOpenNoiseThresh > 127)
-			pInfo->SquelchOpenNoiseThresh = 127;
+		rssi_close   = (rssi_open   *  9) / 10;
+		noise_close  = (noise_open  * 10) / 9;
+		glitch_close = (glitch_open * 10) / 9;

-		if (pInfo->SquelchCloseNoiseThresh > 127)
-			pInfo->SquelchCloseNoiseThresh = 127;
+		// ensure the 'close' threshold is lower than the 'open' threshold
+		if (rssi_close   == rssi_open   && rssi_close   >= 2)
+			rssi_close -= 2;
+		if (noise_close  == noise_open  && noise_close  <= 125)
+			noise_close += 2;
+		if (glitch_close == glitch_open && glitch_close <= 253)
+			glitch_close += 2;
+
+		pInfo->SquelchOpenRSSIThresh    = (rssi_open    > 255) ? 255 : rssi_open;
+		pInfo->SquelchCloseRSSIThresh   = (rssi_close   > 255) ? 255 : rssi_close;
+		pInfo->SquelchOpenNoiseThresh   = (noise_open   > 127) ? 127 : noise_open;
+		pInfo->SquelchCloseNoiseThresh  = (noise_close  > 127) ? 127 : noise_close;
+		pInfo->SquelchOpenGlitchThresh  = (glitch_open  > 255) ? 255 : glitch_open;
+		pInfo->SquelchCloseGlitchThresh = (glitch_close > 255) ? 255 : glitch_close;
 	}

+	// *******************************
+	// output power
+	
 	Band = FREQUENCY_GetBand(pInfo->pTX->Frequency);

 	EEPROM_ReadBuffer(0x1ED0 + (Band * 16) + (pInfo->OUTPUT_POWER * 3), Txp, 3);
@@ -492,6 +524,8 @@ void RADIO_ConfigureSquelchAndOutputPower(VFO_Info_t *pInfo)
 		(frequencyBandTable[Band].lower + frequencyBandTable[Band].upper) / 2,
 		 frequencyBandTable[Band].upper,
 		pInfo->pTX->Frequency);
+
+	// *******************************
 }

 void RADIO_ApplyOffset(VFO_Info_t *pInfo)
@@ -521,30 +555,16 @@ void RADIO_ApplyOffset(VFO_Info_t *pInfo)

 static void RADIO_SelectCurrentVfo(void)
 {
-	gCurrentVfo = (gEeprom.CROSS_BAND_RX_TX == CROSS_BAND_OFF) ? gRxVfo : &gEeprom.VfoInfo[gEeprom.TX_CHANNEL];
+ 	gCurrentVfo = (gEeprom.CROSS_BAND_RX_TX == CROSS_BAND_OFF) ? gRxVfo : &gEeprom.VfoInfo[gEeprom.TX_VFO];
 }

 void RADIO_SelectVfos(void)
 {
-	if (gEeprom.CROSS_BAND_RX_TX == CROSS_BAND_CHAN_B)
-		gEeprom.TX_CHANNEL = 1;
-	else
-	if (gEeprom.CROSS_BAND_RX_TX == CROSS_BAND_CHAN_A)
-		gEeprom.TX_CHANNEL = 0;
-	else
-	if (gEeprom.DUAL_WATCH == DUAL_WATCH_CHAN_B)
-		gEeprom.TX_CHANNEL = 1;
-	else
-	if (gEeprom.DUAL_WATCH == DUAL_WATCH_CHAN_A)
-		gEeprom.TX_CHANNEL = 0;
+	gEeprom.TX_VFO = get_tx_VFO();
+	gEeprom.RX_VFO = (gEeprom.CROSS_BAND_RX_TX == CROSS_BAND_OFF) ? gEeprom.TX_VFO : (gEeprom.TX_VFO + 1) & 1u;

-	if (gEeprom.CROSS_BAND_RX_TX == CROSS_BAND_OFF)
-		gEeprom.RX_CHANNEL =  gEeprom.TX_CHANNEL;
-	else
-		gEeprom.RX_CHANNEL = (gEeprom.TX_CHANNEL == 0) ? 1 : 0;
-
-	gTxVfo = &gEeprom.VfoInfo[gEeprom.TX_CHANNEL];
-	gRxVfo = &gEeprom.VfoInfo[gEeprom.RX_CHANNEL];
+	gTxVfo = &gEeprom.VfoInfo[gEeprom.TX_VFO];
+	gRxVfo = &gEeprom.VfoInfo[gEeprom.RX_VFO];

 	RADIO_SelectCurrentVfo();
 }
@@ -561,6 +581,9 @@ void RADIO_SetupRegisters(bool bSwitchToFunction0)

 	BK4819_ToggleGpioOut(BK4819_GPIO0_PIN28_GREEN, false);

+	#pragma GCC diagnostic push
+	#pragma GCC diagnostic ignored "-Wimplicit-fallthrough="
+
 	switch (Bandwidth)
 	{
 		default:
@@ -568,14 +591,16 @@ void RADIO_SetupRegisters(bool bSwitchToFunction0)
 		case BK4819_FILTER_BW_WIDE:
 		case BK4819_FILTER_BW_NARROW:
 			#ifdef ENABLE_AM_FIX
-				BK4819_SetFilterBandwidth(Bandwidth, gRxVfo->AM_mode && gSetting_AM_fix);
-//				BK4819_SetFilterBandwidth(Bandwidth, false);
+//				BK4819_SetFilterBandwidth(Bandwidth, gRxVfo->AM_mode && gSetting_AM_fix);
+				BK4819_SetFilterBandwidth(Bandwidth, true);
 			#else
 				BK4819_SetFilterBandwidth(Bandwidth, false);
 			#endif
 			break;
 	}

+	#pragma GCC diagnostic pop
+
 	BK4819_ToggleGpioOut(BK4819_GPIO1_PIN29_RED, false);

 	BK4819_SetupPowerAmplifier(0, 0);
@@ -698,30 +723,30 @@ void RADIO_SetupRegisters(bool bSwitchToFunction0)
 		}
 	#endif

-	#ifdef ENABLE_NOAA
-		#ifdef ENABLE_FMRADIO
-			if (gEeprom.VOX_SWITCH && !gFmRadioMode && IS_NOT_NOAA_CHANNEL(gCurrentVfo->CHANNEL_SAVE) && gCurrentVfo->AM_mode == 0)
+	#ifdef ENABLE_VOX
+		#ifdef ENABLE_NOAA
+			#ifdef ENABLE_FMRADIO
+				if (gEeprom.VOX_SWITCH && !gFmRadioMode && IS_NOT_NOAA_CHANNEL(gCurrentVfo->CHANNEL_SAVE) && gCurrentVfo->AM_mode == 0)
+			#else
+				if (gEeprom.VOX_SWITCH && IS_NOT_NOAA_CHANNEL(gCurrentVfo->CHANNEL_SAVE) && gCurrentVfo->AM_mode == 0)
+			#endif
 		#else
-			if (gEeprom.VOX_SWITCH && IS_NOT_NOAA_CHANNEL(gCurrentVfo->CHANNEL_SAVE) && gCurrentVfo->AM_mode == 0)
-		#endif
-	#else
-		#ifdef ENABLE_FMRADIO
-			if (gEeprom.VOX_SWITCH && !gFmRadioMode && gCurrentVfo->AM_mode == 0)
-		#else
-			if (gEeprom.VOX_SWITCH && gCurrentVfo->AM_mode == 0)
+			#ifdef ENABLE_FMRADIO
+				if (gEeprom.VOX_SWITCH && !gFmRadioMode && gCurrentVfo->AM_mode == 0)
+			#else
+				if (gEeprom.VOX_SWITCH && gCurrentVfo->AM_mode == 0)
+			#endif
 		#endif
+		{
+			BK4819_EnableVox(gEeprom.VOX1_THRESHOLD, gEeprom.VOX0_THRESHOLD);
+			InterruptMask |= BK4819_REG_3F_VOX_FOUND | BK4819_REG_3F_VOX_LOST;
+		}
+		else
 	#endif
-	{
-		BK4819_EnableVox(gEeprom.VOX1_THRESHOLD, gEeprom.VOX0_THRESHOLD);
-		InterruptMask |= BK4819_REG_3F_VOX_FOUND | BK4819_REG_3F_VOX_LOST;
-	}
-	else
 		BK4819_DisableVox();

-	#ifdef ENABLE_COMPANDER
-		// RX expander
-		BK4819_SetCompander((gRxVfo->AM_mode == 0 && gRxVfo->Compander >= 2) ? gRxVfo->Compander : 0);
-	#endif
+	// RX expander
+	BK4819_SetCompander((gRxVfo->AM_mode == 0 && gRxVfo->Compander >= 2) ? gRxVfo->Compander : 0);

 	#if 0
 		if (!gRxVfo->DTMF_DECODING_ENABLE && !gSetting_KILLED)
@@ -736,6 +761,7 @@ void RADIO_SetupRegisters(bool bSwitchToFunction0)
 	#else
 		if (gCurrentFunction != FUNCTION_TRANSMIT)
 		{
+			BK4819_DisableDTMF();
 			BK4819_EnableDTMF();
 			InterruptMask |= BK4819_REG_3F_DTMF_5TONE_FOUND;
 		}
@@ -809,6 +835,9 @@ void RADIO_SetTxParameters(void)

 	BK4819_ToggleGpioOut(BK4819_GPIO6_PIN2, false);

+	#pragma GCC diagnostic push
+	#pragma GCC diagnostic ignored "-Wimplicit-fallthrough="
+
 	switch (Bandwidth)
 	{
 		default:
@@ -816,20 +845,20 @@ void RADIO_SetTxParameters(void)
 		case BK4819_FILTER_BW_WIDE:
 		case BK4819_FILTER_BW_NARROW:
 			#ifdef ENABLE_AM_FIX
-				BK4819_SetFilterBandwidth(Bandwidth, gCurrentVfo->AM_mode && gSetting_AM_fix);
-//				BK4819_SetFilterBandwidth(Bandwidth, false);
+//				BK4819_SetFilterBandwidth(Bandwidth, gCurrentVfo->AM_mode && gSetting_AM_fix);
+				BK4819_SetFilterBandwidth(Bandwidth, true);
 			#else
 				BK4819_SetFilterBandwidth(Bandwidth, false);
 			#endif
 			break;
 	}

+	#pragma GCC diagnostic pop
+
 	BK4819_SetFrequency(gCurrentVfo->pTX->Frequency);

-	#ifdef ENABLE_COMPANDER
-		// TX compressor
-		BK4819_SetCompander((gRxVfo->AM_mode == 0 && (gRxVfo->Compander == 1 || gRxVfo->Compander >= 3)) ? gRxVfo->Compander : 0);
-	#endif
+	// TX compressor
+	BK4819_SetCompander((gRxVfo->AM_mode == 0 && (gRxVfo->Compander == 1 || gRxVfo->Compander >= 3)) ? gRxVfo->Compander : 0);

 	BK4819_PrepareTransmit();

@@ -882,10 +911,9 @@ void RADIO_SetVfoState(VfoState_t State)
 			VfoState[1] = VFO_STATE_TX_DISABLE;
 		}
 		else
-		{
-			unsigned int chan = (gEeprom.DUAL_WATCH != DUAL_WATCH_OFF && gRxVfoIsActive) ? (gEeprom.RX_CHANNEL + 1) & 1 : gEeprom.RX_CHANNEL;	// 1of11
-			             chan = (gEeprom.CROSS_BAND_RX_TX == CROSS_BAND_OFF) ? gEeprom.TX_CHANNEL : chan;
-			VfoState[chan]    = State;
+		{	// 1of11
+			const unsigned int vfo = (gEeprom.CROSS_BAND_RX_TX == CROSS_BAND_OFF) ? gEeprom.RX_VFO : gEeprom.TX_VFO;
+			VfoState[vfo] = State;
 		}

 		#ifdef ENABLE_FMRADIO
@@ -907,11 +935,12 @@ void RADIO_PrepareTX(void)
 		gScheduleDualWatch       = false;

 		if (!gRxVfoIsActive)
-		{	// use the TX vfo
-			gEeprom.RX_CHANNEL = gEeprom.TX_CHANNEL;
-			gRxVfo             = &gEeprom.VfoInfo[gEeprom.TX_CHANNEL];
-			gRxVfoIsActive     = true;
+		{	// use the current RX vfo
+			gEeprom.RX_VFO = gEeprom.TX_VFO;
+			gRxVfo         = &gEeprom.VfoInfo[gEeprom.TX_VFO];
+			gRxVfoIsActive = true;
 		}
+		gCurrentVfo = gRxVfo;

 		// let the user see that DW is not active
 		gDualWatchActive = false;
@@ -944,7 +973,6 @@ void RADIO_PrepareTX(void)
 			State = VFO_STATE_TX_DISABLE;
 		}
 		else
-		//if (TX_freq_check(gCurrentVfo->pTX->Frequency) == 0 || gCurrentVfo->CHANNEL_SAVE <= FREQ_CHANNEL_LAST)
 		if (TX_freq_check(gCurrentVfo->pTX->Frequency) == 0)
 		{	// TX frequency is allowed
 			if (gCurrentVfo->BUSY_CHANNEL_LOCK && gCurrentFunction == FUNCTION_RECEIVE)
@@ -963,10 +991,13 @@ void RADIO_PrepareTX(void)
 	if (State != VFO_STATE_NORMAL)
 	{	// TX not allowed
 		RADIO_SetVfoState(State);
+
 		#if defined(ENABLE_ALARM) || defined(ENABLE_TX1750)
 			gAlarmState = ALARM_STATE_OFF;
 		#endif
+
 		gDTMF_ReplyState = DTMF_REPLY_NONE;
+
 		AUDIO_PlayBeep(BEEP_500HZ_60MS_DOUBLE_BEEP_OPTIONAL);
 		return;
 	}
@@ -1050,8 +1081,12 @@ void RADIO_SendEndOfTransmission(void)
 	if (gEeprom.ROGER == ROGER_MODE_MDC)
 		BK4819_PlayRogerMDC();

+	if (gCurrentVfo->DTMF_PTT_ID_TX_MODE == PTT_ID_APOLLO)
+		BK4819_PlaySingleTone(2475, 250, 28, gEeprom.DTMF_SIDE_TONE);
+
 	if (gDTMF_CallState == DTMF_CALL_STATE_NONE &&
-	   (gCurrentVfo->DTMF_PTT_ID_TX_MODE == PTT_ID_TX_DOWN || gCurrentVfo->DTMF_PTT_ID_TX_MODE == PTT_ID_BOTH))
+	   (gCurrentVfo->DTMF_PTT_ID_TX_MODE == PTT_ID_TX_DOWN ||
+	    gCurrentVfo->DTMF_PTT_ID_TX_MODE == PTT_ID_BOTH))
 	{	// end-of-tx
 		if (gEeprom.DTMF_SIDE_TONE)
 		{
@@ -1063,15 +1098,14 @@ void RADIO_SendEndOfTransmission(void)
 		BK4819_EnterDTMF_TX(gEeprom.DTMF_SIDE_TONE);

 		BK4819_PlayDTMFString(
-			gEeprom.DTMF_DOWN_CODE,
-			0,
-			gEeprom.DTMF_FIRST_CODE_PERSIST_TIME,
-			gEeprom.DTMF_HASH_CODE_PERSIST_TIME,
-			gEeprom.DTMF_CODE_PERSIST_TIME,
-			gEeprom.DTMF_CODE_INTERVAL_TIME);
+				gEeprom.DTMF_DOWN_CODE,
+				0,
+				gEeprom.DTMF_FIRST_CODE_PERSIST_TIME,
+				gEeprom.DTMF_HASH_CODE_PERSIST_TIME,
+				gEeprom.DTMF_CODE_PERSIST_TIME,
+				gEeprom.DTMF_CODE_INTERVAL_TIME);
 		
 		GPIO_ClearBit(&GPIOC->DATA, GPIOC_PIN_AUDIO_PATH);
-
 		gEnableSpeaker = false;
 	}

--- a/radio.h
+++ b/radio.h
@@ -25,9 +25,7 @@

 enum {
 	MR_CH_BAND_MASK   = 0x0F << 0,
-	#ifdef ENABLE_COMPANDER
-		MR_CH_COMPAND =   3u << 4,  // new
-	#endif
+	MR_CH_COMPAND     =   3u << 4,  // new
 	MR_CH_SCANLIST2   =   1u << 6,
 	MR_CH_SCANLIST1   =   1u << 7
 };
@@ -46,7 +44,8 @@ enum PTT_ID_t {
 	PTT_ID_OFF = 0,    // OFF
 	PTT_ID_TX_UP,      // BEGIN OF TX
 	PTT_ID_TX_DOWN,    // END OF TX
-	PTT_ID_BOTH        // BOTH
+	PTT_ID_BOTH,       // BOTH
+	PTT_ID_APOLLO      // Apolo quindar tones
 };
 typedef enum PTT_ID_t PTT_ID_t;

@@ -111,9 +110,7 @@ typedef struct VFO_Info_t

 	uint8_t        AM_mode;

-	#ifdef ENABLE_COMPANDER
-		uint8_t    Compander;
-	#endif
+	uint8_t        Compander;

 	char           Name[16];
 } VFO_Info_t;
--- a/scheduler.c
+++ b/scheduler.c
@@ -77,20 +77,20 @@ void SystickHandler(void)
 	if (gCurrentFunction == FUNCTION_POWER_SAVE)
 		DECREMENT_AND_TRIGGER(gPowerSave_10ms, gPowerSaveCountdownExpired);

-	if (gScanState == SCAN_OFF && gCssScanMode == CSS_SCAN_MODE_OFF && gEeprom.DUAL_WATCH != DUAL_WATCH_OFF)
+	if (gScanStateDir == SCAN_OFF && gCssScanMode == CSS_SCAN_MODE_OFF && gEeprom.DUAL_WATCH != DUAL_WATCH_OFF)
 		if (gCurrentFunction != FUNCTION_MONITOR && gCurrentFunction != FUNCTION_TRANSMIT && gCurrentFunction != FUNCTION_RECEIVE)
 			DECREMENT_AND_TRIGGER(gDualWatchCountdown_10ms, gScheduleDualWatch);

 	#ifdef ENABLE_NOAA
-		if (gScanState == SCAN_OFF && gCssScanMode == CSS_SCAN_MODE_OFF && gEeprom.DUAL_WATCH == DUAL_WATCH_OFF)
+		if (gScanStateDir == SCAN_OFF && gCssScanMode == CSS_SCAN_MODE_OFF && gEeprom.DUAL_WATCH == DUAL_WATCH_OFF)
 			if (gIsNoaaMode && gCurrentFunction != FUNCTION_MONITOR && gCurrentFunction != FUNCTION_TRANSMIT)
 				if (gCurrentFunction != FUNCTION_RECEIVE)
 					DECREMENT_AND_TRIGGER(gNOAA_Countdown_10ms, gScheduleNOAA);
 	#endif

-	if (gScanState != SCAN_OFF || gCssScanMode == CSS_SCAN_MODE_SCANNING)
+	if (gScanStateDir != SCAN_OFF || gCssScanMode == CSS_SCAN_MODE_SCANNING)
 		if (gCurrentFunction != FUNCTION_MONITOR && gCurrentFunction != FUNCTION_TRANSMIT)
-			DECREMENT_AND_TRIGGER(ScanPauseDelayIn_10ms, gScheduleScanListen);
+			DECREMENT_AND_TRIGGER(gScanPauseDelayIn_10ms, gScheduleScanListen);

 	DECREMENT_AND_TRIGGER(gTailNoteEliminationCountdown_10ms, gFlagTailNoteEliminationComplete);

@@ -104,7 +104,9 @@ void SystickHandler(void)
 				DECREMENT_AND_TRIGGER(gFmPlayCountdown_10ms, gScheduleFM);
 	#endif

-	DECREMENT(gVoxStopCountdown_10ms);
+	#ifdef ENABLE_VOX
+		DECREMENT(gVoxStopCountdown_10ms);
+	#endif

 	DECREMENT(boot_counter_10ms);
 }
--- a/settings.c
+++ b/settings.c
@@ -86,8 +86,13 @@ void SETTINGS_SaveSettings(void)
 		State[3] = false;
 	#endif
 	State[4] = gEeprom.KEY_LOCK;
-	State[5] = gEeprom.VOX_SWITCH;
-	State[6] = gEeprom.VOX_LEVEL;
+	#ifdef ENABLE_VOX
+		State[5] = gEeprom.VOX_SWITCH;
+		State[6] = gEeprom.VOX_LEVEL;
+	#else
+		State[5] = false;
+		State[6] = 0;
+	#endif
 	State[7] = gEeprom.MIC_SENSITIVITY;
 	EEPROM_WriteBuffer(0x0E70, State);

@@ -112,8 +117,10 @@ void SETTINGS_SaveSettings(void)
 	EEPROM_WriteBuffer(0x0E90, State);

 	memset(Password, 0xFF, sizeof(Password));
-	Password[0] = gEeprom.POWER_ON_PASSWORD;
-	EEPROM_WriteBuffer(0x0E98, State);
+	#ifdef ENABLE_PWRON_PASSWORD
+		Password[0] = gEeprom.POWER_ON_PASSWORD;
+	#endif
+	EEPROM_WriteBuffer(0x0E98, Password);

 	#ifdef ENABLE_VOICE
 		memset(State, 0xFF, sizeof(State));
@@ -128,14 +135,14 @@ void SETTINGS_SaveSettings(void)
 	#endif
 	State[1] = gEeprom.ROGER;
 	State[2] = gEeprom.REPEATER_TAIL_TONE_ELIMINATION;
-	State[3] = gEeprom.TX_CHANNEL;
+	State[3] = gEeprom.TX_VFO;
 	EEPROM_WriteBuffer(0x0EA8, State);

 	State[0] = gEeprom.DTMF_SIDE_TONE;
 	State[1] = gEeprom.DTMF_SEPARATE_CODE;
 	State[2] = gEeprom.DTMF_GROUP_CALL_CODE;
 	State[3] = gEeprom.DTMF_DECODE_RESPONSE;
-	State[4] = gEeprom.DTMF_AUTO_RESET_TIME;
+	State[4] = gEeprom.DTMF_auto_reset_time;
 	State[5] = gEeprom.DTMF_PRELOAD_TIME / 10U;
 	State[6] = gEeprom.DTMF_FIRST_CODE_PERSIST_TIME / 10U;
 	State[7] = gEeprom.DTMF_HASH_CODE_PERSIST_TIME / 10U;
@@ -174,15 +181,11 @@ void SETTINGS_SaveSettings(void)
 	#ifdef ENABLE_AM_FIX
 		if (!gSetting_AM_fix)            State[7] &= ~(1u << 5);
 	#endif
-	if (!gSetting_backlight_on_rx)   State[7] &= ~(1u << 6);
+	State[7] = (State[7] & ~(3u << 6)) | ((gSetting_backlight_on_tx_rx & 3u) << 6);
 	 
 	EEPROM_WriteBuffer(0x0F40, State);
 }

-void SETTINGS_LoadChannel(uint8_t Channel, uint8_t VFO, const VFO_Info_t *pVFO)
-{
-}
-
 void SETTINGS_SaveChannel(uint8_t Channel, uint8_t VFO, const VFO_Info_t *pVFO, uint8_t Mode)
 {
 	#ifdef ENABLE_NOAA
@@ -192,13 +195,13 @@ void SETTINGS_SaveChannel(uint8_t Channel, uint8_t VFO, const VFO_Info_t *pVFO,
 		const uint16_t OffsetMR  = Channel * 16;
 		      uint16_t OffsetVFO = OffsetMR;

-		if (!IS_MR_CHANNEL(Channel))
+		if (Channel > MR_CHANNEL_LAST)
 		{	// it's a VFO, not a channel
 			OffsetVFO  = (VFO == 0) ? 0x0C80 : 0x0C90;
 			OffsetVFO += (Channel - FREQ_CHANNEL_FIRST) * 32;
 		}

-		if (Mode >= 2 || !IS_MR_CHANNEL(Channel))
+		if (Mode >= 2 || Channel > MR_CHANNEL_LAST)
 		{	// copy VFO to a channel

 			uint8_t State[8];
@@ -216,15 +219,16 @@ void SETTINGS_SaveChannel(uint8_t Channel, uint8_t VFO, const VFO_Info_t *pVFO,
 				| (pVFO->OUTPUT_POWER      << 2)
 				| (pVFO->CHANNEL_BANDWIDTH << 1)
 				| (pVFO->FrequencyReverse  << 0);
-			State[5] = (pVFO->DTMF_PTT_ID_TX_MODE << 1) | (pVFO->DTMF_DECODING_ENABLE << 0);
+			State[5] = ((pVFO->DTMF_PTT_ID_TX_MODE & 7u) << 1) | ((pVFO->DTMF_DECODING_ENABLE & 1u) << 0);
 			State[6] =  pVFO->STEP_SETTING;
 			State[7] =  pVFO->SCRAMBLING_TYPE;
 			EEPROM_WriteBuffer(OffsetVFO + 8, State);

 			SETTINGS_UpdateChannel(Channel, pVFO, true);

-			if (IS_MR_CHANNEL(Channel))
-			{
+			if (Channel <= MR_CHANNEL_LAST)
+			{	// it's a memory channel
+		
 				#ifndef ENABLE_KEEP_MEM_NAME
 					// clear/reset the channel name
 					//memset(&State, 0xFF, sizeof(State));
@@ -255,20 +259,15 @@ void SETTINGS_UpdateChannel(uint8_t Channel, const VFO_Info_t *pVFO, bool keep)
 	{
 		uint8_t  State[8];
 		uint8_t  Attributes = 0xFF;        // default attributes
-		#ifdef ENABLE_COMPANDER
-			Attributes &= ~MR_CH_COMPAND;  // default to '0' = compander disabled
-		#endif
 		uint16_t Offset = 0x0D60 + (Channel & ~7u);
 		
+		Attributes &= (uint8_t)(~MR_CH_COMPAND);  // default to '0' = compander disabled
+
 		EEPROM_ReadBuffer(Offset, State, sizeof(State));

 		if (keep)
 		{
-			#ifdef ENABLE_COMPANDER
-				Attributes = (pVFO->SCANLIST1_PARTICIPATION << 7) | (pVFO->SCANLIST2_PARTICIPATION << 6) | (pVFO->Compander << 4) | (pVFO->Band << 0);
-			#else
-				Attributes = (pVFO->SCANLIST1_PARTICIPATION << 7) | (pVFO->SCANLIST2_PARTICIPATION << 6) | (pVFO->Band << 0);
-			#endif
+			Attributes = (pVFO->SCANLIST1_PARTICIPATION << 7) | (pVFO->SCANLIST2_PARTICIPATION << 6) | (pVFO->Compander << 4) | (pVFO->Band << 0);
 			if (State[Channel & 7u] == Attributes)
 				return; // no change in the attributes
 		}
@@ -280,8 +279,9 @@ void SETTINGS_UpdateChannel(uint8_t Channel, const VFO_Info_t *pVFO, bool keep)
 		gMR_ChannelAttributes[Channel] = Attributes;

 //		#ifndef ENABLE_KEEP_MEM_NAME
-			if (IS_MR_CHANNEL(Channel))
-			{
+			if (Channel <= MR_CHANNEL_LAST)
+			{	// it's a memory channel
+		
 				const uint16_t OffsetMR = Channel * 16;
 				if (!keep)
 				{	// clear/reset the channel name
--- a/settings.h
+++ b/settings.h
@@ -121,13 +121,21 @@ typedef struct {
 	#ifdef ENABLE_NOAA
 		uint8_t           NoaaChannel[2];
 	#endif
-	uint8_t               RX_CHANNEL;
-	uint8_t               TX_CHANNEL;
+	uint8_t               RX_VFO;
+	uint8_t               TX_VFO;

 	uint8_t               field7_0xa;
 	uint8_t               field8_0xb;

-	uint32_t              POWER_ON_PASSWORD;
+	#ifdef ENABLE_FMRADIO
+		uint16_t          FM_SelectedFrequency;
+		uint8_t           FM_SelectedChannel;
+		bool              FM_IsMrMode;
+		uint16_t          FM_FrequencyPlaying;
+		uint16_t          FM_LowerLimit;
+		uint16_t          FM_UpperLimit;
+	#endif
+
 	uint8_t               SQUELCH_LEVEL;
 	uint8_t               TX_TIMEOUT_TIMER;
 	bool                  KEY_LOCK;
@@ -153,24 +161,9 @@ typedef struct {
 	uint8_t               field29_0x26;
 	uint8_t               field30_0x27;
 	
-	uint16_t              VOX1_THRESHOLD;
-	uint16_t              VOX0_THRESHOLD;
-
-	#ifdef ENABLE_FMRADIO
-		uint16_t          FM_SelectedFrequency;
-		uint8_t           FM_SelectedChannel;
-		bool              FM_IsMrMode;
-		uint16_t          FM_FrequencyPlaying;
-	#endif
-	
 	uint8_t               field37_0x32;
 	uint8_t               field38_0x33;

-	#ifdef ENABLE_FMRADIO
-		uint16_t          FM_LowerLimit;
-		uint16_t          FM_UpperLimit;
-	#endif
-
 	bool                  AUTO_KEYPAD_LOCK;
 	#if defined(ENABLE_ALARM) || defined(ENABLE_TX1750)
 		ALARM_Mode_t      ALARM_MODE;
@@ -201,7 +194,7 @@ typedef struct {
 	char                  DTMF_SEPARATE_CODE;
 	char                  DTMF_GROUP_CALL_CODE;
 	uint8_t               DTMF_DECODE_RESPONSE;
-	uint8_t               DTMF_AUTO_RESET_TIME;
+	uint8_t               DTMF_auto_reset_time;
 	uint16_t              DTMF_PRELOAD_TIME;
 	uint16_t              DTMF_FIRST_CODE_PERSIST_TIME;
 	uint16_t              DTMF_HASH_CODE_PERSIST_TIME;
@@ -216,11 +209,16 @@ typedef struct {
 	uint8_t               VOLUME_GAIN;
 	uint8_t               DAC_GAIN;

+	VFO_Info_t            VfoInfo[2];
+	uint32_t              POWER_ON_PASSWORD;
+	uint16_t              VOX1_THRESHOLD;
+	uint16_t              VOX0_THRESHOLD;
+
 	uint8_t               field77_0x95;
 	uint8_t               field78_0x96;
 	uint8_t               field79_0x97;

-	VFO_Info_t            VfoInfo[2];
+	uint8_t _pad[1];
 } EEPROM_Config_t;
 extern EEPROM_Config_t gEeprom;

--- a/ui/battery.c
+++ b/ui/battery.c
@@ -22,66 +22,36 @@
 #include "functions.h"
 #include "ui/battery.h"

-void UI_DisplayBattery(const uint8_t level, const uint8_t blink)
+void UI_DrawBattery(uint8_t* bitmap, uint8_t level, uint8_t blink)
 {
-//	if (gCurrentFunction != FUNCTION_TRANSMIT)
+	memmove(bitmap, BITMAP_BatteryLevel1, sizeof(BITMAP_BatteryLevel1));
+
+	if (level >= 1)
 	{
-		uint8_t bitmap[sizeof(BITMAP_BatteryLevel1)];
-		
-#if 1
-
-		if (level >= 2)
+		unsigned int i;
+		uint8_t bars = level > 0 ? level - 1 : 0;
+		if(bars>4) bars = 4;
+		for (i = 0; i < bars; i++)
 		{
-			memmove(bitmap, BITMAP_BatteryLevel1, sizeof(BITMAP_BatteryLevel1));
 			#ifndef ENABLE_REVERSE_BAT_SYMBOL
-				uint8_t *pb = bitmap + sizeof(BITMAP_BatteryLevel1);
-				if (level >= 2)
-					memmove(pb -  4, BITMAP_BatteryLevel, sizeof(BITMAP_BatteryLevel));
-				if (level >= 5)
-					memmove(pb -  7, BITMAP_BatteryLevel, sizeof(BITMAP_BatteryLevel));
-				if (level >= 7)
-					memmove(pb - 10, BITMAP_BatteryLevel, sizeof(BITMAP_BatteryLevel));
-				if (level >= 9)
-					memmove(pb - 13, BITMAP_BatteryLevel, sizeof(BITMAP_BatteryLevel));
+				memcpy(bitmap + sizeof(bitmap) - 4 - (i * 3), BITMAP_BatteryLevel, 2);
 			#else
-				if (level >= 2)
-					memmove(bitmap +  3, BITMAP_BatteryLevel, sizeof(BITMAP_BatteryLevel));
-				if (level >= 5)
-					memmove(bitmap +  6, BITMAP_BatteryLevel, sizeof(BITMAP_BatteryLevel));
-				if (level >= 7)
-					memmove(bitmap +  9, BITMAP_BatteryLevel, sizeof(BITMAP_BatteryLevel));
-				if (level >= 9)
-					memmove(bitmap + 12, BITMAP_BatteryLevel, sizeof(BITMAP_BatteryLevel));
+				memcpy(bitmap + 3 + (i * 3) + 0, BITMAP_BatteryLevel, 2);
 			#endif
 		}
-		else
-		if (blink == 1)
-			memmove(bitmap, BITMAP_BatteryLevel1, sizeof(BITMAP_BatteryLevel1));
-		else
-			memset(bitmap, 0, sizeof(bitmap));
+	}
+	else
+	if (blink == 0)
+		memset(bitmap, 0, sizeof(bitmap));
+}

-#else
+void UI_DisplayBattery(uint8_t level, uint8_t blink)
+{
+	if (gCurrentFunction != FUNCTION_TRANSMIT) {
+	    uint8_t bitmap[sizeof(BITMAP_BatteryLevel1)];

-		if (level > 0)
-		{
-			const uint8_t lev = (level <= 11) ? level : 11;
-
-			memmove(bitmap, BITMAP_BatteryLevel1, sizeof(BITMAP_BatteryLevel1));
-
-			#ifdef ENABLE_REVERSE_BAT_SYMBOL
-				for (uint8_t i = 0; i < lev; i++)
-					bitmap[3 + i] = (i & 1u) ? 0b01011101 : 0b01011101;
-			#else
-				for (uint8_t i = 0; i < lev; i++)
-					bitmap[sizeof(bitmap) - 3 - i] = (i & 1u) ? 0b01011101 : 0b01011101;
-			#endif
-		}
-		else
-			memset(bitmap, 0, sizeof(bitmap));
-		
-#endif
-
-		//              col lne, siz, bm
+		UI_DrawBattery(bitmap, level, blink);
+		memmove(bitmap, BITMAP_BatteryLevel1, sizeof(BITMAP_BatteryLevel1));
 		ST7565_DrawLine(LCD_WIDTH - sizeof(bitmap), 0, sizeof(bitmap), bitmap);
 	}
 }
--- a/ui/battery.h
+++ b/ui/battery.h
@@ -18,8 +18,8 @@
 #define UI_BATTERY_H

 #include <stdint.h>
-
-void UI_DisplayBattery(const uint8_t Level, const uint8_t blink);
+void UI_DrawBattery(uint8_t* bitmap, uint8_t level, uint8_t blink);
+void UI_DisplayBattery(uint8_t Level, uint8_t blink);

 #endif

--- a/ui/inputbox.c
+++ b/ui/inputbox.c
@@ -21,7 +21,7 @@
 char    gInputBox[8];
 uint8_t gInputBoxIndex;

-void INPUTBOX_Append(char Digit)
+void INPUTBOX_Append(const KEY_Code_t Digit)
 {
 	if (gInputBoxIndex >= sizeof(gInputBox))
 		return;
@@ -29,6 +29,7 @@ void INPUTBOX_Append(char Digit)
 	if (gInputBoxIndex == 0)
 		memset(gInputBox, 10, sizeof(gInputBox));

-	gInputBox[gInputBoxIndex++] = Digit;
+	if (Digit >= KEY_0 && Digit != KEY_INVALID)
+		gInputBox[gInputBoxIndex++] = (char)(Digit - KEY_0);
 }

--- a/ui/inputbox.h
+++ b/ui/inputbox.h
@@ -19,10 +19,12 @@

 #include <stdint.h>

+#include "driver/keyboard.h"
+
 extern char    gInputBox[8];
 extern uint8_t gInputBoxIndex;

-void INPUTBOX_Append(char Digit);
+void INPUTBOX_Append(const KEY_Code_t Digit);

 #endif

--- a/ui/lock.c
+++ b/ui/lock.c
@@ -14,6 +14,8 @@
 *     limitations under the License.
 */

+#ifdef ENABLE_PWRON_PASSWORD
+
 #include <string.h>

 #include "ARMCM0.h"
@@ -156,3 +158,5 @@ void UI_DisplayLock(void)
 		}
 	}
 }
+
+#endif
--- a/ui/lock.h
+++ b/ui/lock.h
@@ -17,7 +17,9 @@
 #ifndef UI_LOCK_H
 #define UI_LOCK_H

-void UI_DisplayLock(void);
+#ifdef ENABLE_PWRON_PASSWORD
+	void UI_DisplayLock(void);
+#endif

 #endif

--- a/ui/main.c
+++ b/ui/main.c
@@ -14,6 +14,10 @@
 *     limitations under the License.
 */

+	#pragma GCC diagnostic push
+	#pragma GCC diagnostic ignored "-Wimplicit-fallthrough="
+	#pragma GCC diagnostic pop
+
 #include <string.h>
 #include <stdlib.h>  // abs()

@@ -36,21 +40,31 @@
 #include "ui/main.h"
 #include "ui/ui.h"

-enum center_line_t {
-	CENTER_LINE_NONE = 0,
-	CENTER_LINE_IN_USE,
-	CENTER_LINE_AUDIO_BAR,
-	CENTER_LINE_RSSI,
-	CENTER_LINE_AM_FIX_DATA,
-	CENTER_LINE_DTMF_DEC,
-	CENTER_LINE_CHARGE_DATA
-};
-typedef enum center_line_t center_line_t;
-
 center_line_t center_line = CENTER_LINE_NONE;

 // ***************************************************************************

+void UI_drawBars(uint8_t *p, const unsigned int level)
+{
+	#pragma GCC diagnostic push
+	#pragma GCC diagnostic ignored "-Wimplicit-fallthrough="
+
+	switch (level)
+	{
+		default:
+		case 7: memmove(p + 20, BITMAP_AntennaLevel6, sizeof(BITMAP_AntennaLevel6));
+		case 6: memmove(p + 17, BITMAP_AntennaLevel5, sizeof(BITMAP_AntennaLevel5));
+		case 5: memmove(p + 14, BITMAP_AntennaLevel4, sizeof(BITMAP_AntennaLevel4));
+		case 4: memmove(p + 11, BITMAP_AntennaLevel3, sizeof(BITMAP_AntennaLevel3));
+		case 3: memmove(p +  8, BITMAP_AntennaLevel2, sizeof(BITMAP_AntennaLevel2));
+		case 2: memmove(p +  5, BITMAP_AntennaLevel1, sizeof(BITMAP_AntennaLevel1));
+		case 1: memmove(p +  0, BITMAP_Antenna,       sizeof(BITMAP_Antenna));
+		case 0: break;
+	}
+
+	#pragma GCC diagnostic pop
+}
+
 #ifdef ENABLE_AUDIO_BAR

 	unsigned int sqrt16(unsigned int value)
@@ -80,49 +94,30 @@ center_line_t center_line = CENTER_LINE_NONE;
 			const unsigned int bar_width = LCD_WIDTH - 2 - bar_x;
 			unsigned int       i;

-			if (gScreenToDisplay != DISPLAY_MAIN)
+			if (gCurrentFunction != FUNCTION_TRANSMIT ||
+				gScreenToDisplay != DISPLAY_MAIN      ||
+				gDTMF_CallState != DTMF_CALL_STATE_NONE)
+			{
+				return;  // screen is in use
+			}
+				
+#if defined(ENABLE_ALARM) || defined(ENABLE_TX1750)
+			if (gAlarmState != ALARM_STATE_OFF)
 				return;
+#endif
+			const unsigned int voice_amp  = BK4819_GetVoiceAmplitudeOut();  // 15:0
 	
-			#if 1
-				// TX audio level
-
-				if (gCurrentFunction != FUNCTION_TRANSMIT)
-					return;
-
-				const unsigned int voice_amp  = BK4819_GetVoiceAmplitudeOut();  // 15:0
-
-//				const unsigned int max        = 65535;
-//				const unsigned int level      = ((voice_amp * bar_width) + (max / 2)) / max;            // with rounding
-//				const unsigned int len        = (level <= bar_width) ? level : bar_width;
-
-				// make non-linear to make more sensitive at low values
-				const unsigned int level      = voice_amp * 8;
-				const unsigned int sqrt_level = sqrt16((level < 65535) ? level : 65535);
-				const unsigned int len        = (sqrt_level <= bar_width) ? sqrt_level : bar_width;
-
-			#else
-				// TX/RX AF input level (dB)
-
-				const uint8_t      af_tx_rx   = BK4819_GetAfTxRx();             //  6:0
-				const unsigned int max        = 63;
-				const unsigned int level      = (((uint16_t)af_tx_rx * bar_width) + (max / 2)) / max;   // with rounding
-				const unsigned int len        = (level <= bar_width) ? level : bar_width;
-
-			#endif
+			// make non-linear to make more sensitive at low values
+			const unsigned int level      = voice_amp * 8;
+			const unsigned int sqrt_level = sqrt16((level < 65535) ? level : 65535);
+			const unsigned int len        = (sqrt_level <= bar_width) ? sqrt_level : bar_width;

 			uint8_t *p_line = gFrameBuffer[line];
 	
 			memset(p_line, 0, LCD_WIDTH);
 	
-			#if 1
-				// solid bar
-				for (i = 0; i < bar_width; i++)
-					p_line[bar_x + i] = (i > len) ? ((i & 1) == 0) ? 0x41 : 0x00 : ((i & 1) == 0) ? 0x7f : 0x3e;
-			#else
-				// knuled bar
-				for (i = 0; i < bar_width; i += 2)
-					p_line[bar_x + i] = (i <= len) ? 0x7f : 0x41;
-			#endif
+			for (i = 0; i < bar_width; i++)
+				p_line[bar_x + i] = (i > len) ? ((i & 1) == 0) ? 0x41 : 0x00 : ((i & 1) == 0) ? 0x7f : 0x3e;

 			if (gCurrentFunction == FUNCTION_TRANSMIT)
 				ST7565_BlitFullScreen();
@@ -160,7 +155,10 @@ center_line_t center_line = CENTER_LINE_NONE;

 		if (gEeprom.KEY_LOCK && gKeypadLocked > 0)
 			return;     // display is in use
-		if (gCurrentFunction == FUNCTION_TRANSMIT || gScreenToDisplay != DISPLAY_MAIN)
+
+		if (gCurrentFunction == FUNCTION_TRANSMIT ||
+		    gScreenToDisplay != DISPLAY_MAIN ||
+			gDTMF_CallState != DTMF_CALL_STATE_NONE)
 			return;     // display is in use

 		if (now)
@@ -198,6 +196,8 @@ void UI_UpdateRSSI(const int16_t rssi, const int vfo)
 {
 	#ifdef ENABLE_RSSI_BAR

+		(void)vfo;  // unused
+		
 		// optional larger RSSI dBm, S-point and bar level

 		if (center_line != CENTER_LINE_RSSI)
@@ -275,25 +275,12 @@ void UI_UpdateRSSI(const int16_t rssi, const int vfo)

 		memset(p_line, 0, 23);

-		if (rssi_level > 0)
-		{
-			//if (rssi_level >= 1)
-				memmove(p_line, BITMAP_Antenna, 5);
-			if (rssi_level >= 2)
-				memmove(p_line +  5, BITMAP_AntennaLevel1, sizeof(BITMAP_AntennaLevel1));
-			if (rssi_level >= 3)
-				memmove(p_line +  8, BITMAP_AntennaLevel2, sizeof(BITMAP_AntennaLevel2));
-			if (rssi_level >= 4)
-				memmove(p_line + 11, BITMAP_AntennaLevel3, sizeof(BITMAP_AntennaLevel3));
-			if (rssi_level >= 5)
-				memmove(p_line + 14, BITMAP_AntennaLevel4, sizeof(BITMAP_AntennaLevel4));
-			if (rssi_level >= 6)
-				memmove(p_line + 17, BITMAP_AntennaLevel5, sizeof(BITMAP_AntennaLevel5));
-			if (rssi_level >= 7)
-				memmove(p_line + 20, BITMAP_AntennaLevel6, sizeof(BITMAP_AntennaLevel6));
-		}
-		else
+		// untested !!!
+
+		if (rssi_level == 0)
 			p_line = NULL;
+		else
+			UI_drawBars(p_line, rssi_level);

 		ST7565_DrawLine(0, Line, 23, p_line);
 	#endif
@@ -330,13 +317,13 @@ void UI_DisplayMain(void)
 	for (vfo_num = 0; vfo_num < 2; vfo_num++)
 	{
 		const unsigned int line       = (vfo_num == 0) ? line0 : line1;
-		uint8_t            channel    = gEeprom.TX_CHANNEL;
-//		uint8_t            tx_channel = (gEeprom.CROSS_BAND_RX_TX == CROSS_BAND_OFF) ? gEeprom.RX_CHANNEL : gEeprom.TX_CHANNEL;
+		unsigned int       channel    = gEeprom.TX_VFO;
+//		unsigned int       tx_channel = (gEeprom.CROSS_BAND_RX_TX == CROSS_BAND_OFF) ? gEeprom.RX_VFO : gEeprom.TX_VFO;
 		const bool         same_vfo   = (channel == vfo_num) ? true : false;
 		uint8_t           *p_line0    = gFrameBuffer[line + 0];
 		uint8_t           *p_line1    = gFrameBuffer[line + 1];
-		uint8_t            mode       = 0;
-		uint8_t            state;
+		unsigned int       mode       = 0;
+		unsigned int       state;

 		if (single_vfo)
 		{	// we're in single VFO mode - screen is dedicated to just one VFO
@@ -348,7 +335,7 @@ void UI_DisplayMain(void)
 		}

 		if (gEeprom.DUAL_WATCH != DUAL_WATCH_OFF && gRxVfoIsActive)
-			channel = gEeprom.RX_CHANNEL;    // we're currently monitoring the other VFO
+			channel = gEeprom.RX_VFO;    // we're currently monitoring the other VFO

 		if (channel != vfo_num)
 		{
@@ -363,7 +350,7 @@ void UI_DisplayMain(void)
 					if (gDTMF_CallState == DTMF_CALL_STATE_CALL_OUT)
 						strcpy(String, (gDTMF_State == DTMF_STATE_CALL_OUT_RSP) ? "CALL OUT(RSP)" : "CALL OUT");
 					else
-					if (gDTMF_CallState == DTMF_CALL_STATE_RECEIVED)
+					if (gDTMF_CallState == DTMF_CALL_STATE_RECEIVED || gDTMF_CallState == DTMF_CALL_STATE_RECEIVED_STAY)
 						sprintf(String, "CALL FRM:%s", (DTMF_FindContact(gDTMF_Caller, Contact)) ? Contact : gDTMF_Caller);
 					else
 					if (gDTMF_IsTx)
@@ -372,10 +359,8 @@ void UI_DisplayMain(void)
 				else
 				{
 					sprintf(String, ">%s", gDTMF_InputBox);
-
-					center_line = CENTER_LINE_IN_USE;
 				}
-				UI_PrintString(String, 2, 0, vfo_num * 3, 8);
+				UI_PrintString(String, 2, 0, 0 + (vfo_num * 3), 8);

 				memset(String,  0, sizeof(String));
 				if (!gDTMF_InputMode)
@@ -384,16 +369,12 @@ void UI_DisplayMain(void)
 					if (gDTMF_CallState == DTMF_CALL_STATE_CALL_OUT)
 						sprintf(String, ">%s", (DTMF_FindContact(gDTMF_String, Contact)) ? Contact : gDTMF_String);
 					else
-					if (gDTMF_CallState == DTMF_CALL_STATE_RECEIVED)
+					if (gDTMF_CallState == DTMF_CALL_STATE_RECEIVED || gDTMF_CallState == DTMF_CALL_STATE_RECEIVED_STAY)
 						sprintf(String, ">%s", (DTMF_FindContact(gDTMF_Callee, Contact)) ? Contact : gDTMF_Callee);
 					else
 					if (gDTMF_IsTx)
 						sprintf(String, ">%s", gDTMF_String);
 				}
-				else
-				{
-					center_line = CENTER_LINE_IN_USE;
-				}
 				UI_PrintString(String, 2, 0, 2 + (vfo_num * 3), 8);

 				center_line = CENTER_LINE_IN_USE;
@@ -426,7 +407,7 @@ void UI_DisplayMain(void)
 				else
 			#endif
 			{
-				channel = (gEeprom.CROSS_BAND_RX_TX == CROSS_BAND_OFF) ? gEeprom.RX_CHANNEL : gEeprom.TX_CHANNEL;
+				channel = (gEeprom.CROSS_BAND_RX_TX == CROSS_BAND_OFF) ? gEeprom.RX_VFO : gEeprom.TX_VFO;
 				if (channel == vfo_num)
 				{	// show the TX symbol
 					mode = 1;
@@ -444,7 +425,7 @@ void UI_DisplayMain(void)
 			if ((gCurrentFunction == FUNCTION_RECEIVE ||
 			     gCurrentFunction == FUNCTION_MONITOR ||
 			     gCurrentFunction == FUNCTION_INCOMING) &&
-			     gEeprom.RX_CHANNEL == vfo_num)
+			     gEeprom.RX_VFO == vfo_num)
 			{
 				#ifdef ENABLE_SMALL_BOLD
 					UI_PrintStringSmallBold("RX", 14, 0, line);
@@ -454,10 +435,10 @@ void UI_DisplayMain(void)
 			}
 		}

-		if (IS_MR_CHANNEL(gEeprom.ScreenChannel[vfo_num]))
+		if (gEeprom.ScreenChannel[vfo_num] <= MR_CHANNEL_LAST)
 		{	// channel mode
 			const unsigned int x = 2;
-			const bool inputting = (gInputBoxIndex == 0 || gEeprom.TX_CHANNEL != vfo_num) ? false : true;
+			const bool inputting = (gInputBoxIndex == 0 || gEeprom.TX_VFO != vfo_num) ? false : true;
 			if (!inputting)
 				NUMBER_ToDigits(gEeprom.ScreenChannel[vfo_num] + 1, String);  // show the memory channel number
 			else
@@ -477,7 +458,7 @@ void UI_DisplayMain(void)
 		#ifdef ENABLE_NOAA
 			else
 			{
-				if (gInputBoxIndex == 0 || gEeprom.TX_CHANNEL != vfo_num)
+				if (gInputBoxIndex == 0 || gEeprom.TX_VFO != vfo_num)
 				{	// channel number
 					sprintf(String, "N%u", 1 + gEeprom.ScreenChannel[vfo_num] - NOAA_CHANNEL_FIRST);
 				}
@@ -496,7 +477,7 @@ void UI_DisplayMain(void)
 		#ifdef ENABLE_ALARM
 			if (gCurrentFunction == FUNCTION_TRANSMIT && gAlarmState == ALARM_STATE_ALARM)
 			{
-				channel = (gEeprom.CROSS_BAND_RX_TX == CROSS_BAND_OFF) ? gEeprom.RX_CHANNEL : gEeprom.TX_CHANNEL;
+				channel = (gEeprom.CROSS_BAND_RX_TX == CROSS_BAND_OFF) ? gEeprom.RX_VFO : gEeprom.TX_VFO;
 				if (channel == vfo_num)
 					state = VFO_STATE_ALARM;
 			}
@@ -505,11 +486,11 @@ void UI_DisplayMain(void)
 		if (state != VFO_STATE_NORMAL)
 		{
 			const char *state_list[] = {"", "BUSY", "BAT LOW", "TX DISABLE", "TIMEOUT", "ALARM", "VOLT HIGH"};
-			if (state >= 0 && state < ARRAY_SIZE(state_list))
+			if (state < ARRAY_SIZE(state_list))
 				UI_PrintString(state_list[state], 31, 0, line, 8);
 		}
 		else
-		if (gInputBoxIndex > 0 && IS_FREQ_CHANNEL(gEeprom.ScreenChannel[vfo_num]) && gEeprom.TX_CHANNEL == vfo_num)
+		if (gInputBoxIndex > 0 && IS_FREQ_CHANNEL(gEeprom.ScreenChannel[vfo_num]) && gEeprom.TX_VFO == vfo_num)
 		{	// user entering a frequency
 			UI_DisplayFrequency(gInputBox, 32, line, true, false);

@@ -520,13 +501,13 @@ void UI_DisplayMain(void)
 			uint32_t frequency = gEeprom.VfoInfo[vfo_num].pRX->Frequency;
 			if (gCurrentFunction == FUNCTION_TRANSMIT)
 			{	// transmitting
-				channel = (gEeprom.CROSS_BAND_RX_TX == CROSS_BAND_OFF) ? gEeprom.RX_CHANNEL : gEeprom.TX_CHANNEL;
+				channel = (gEeprom.CROSS_BAND_RX_TX == CROSS_BAND_OFF) ? gEeprom.RX_VFO : gEeprom.TX_VFO;
 				if (channel == vfo_num)
 					frequency = gEeprom.VfoInfo[vfo_num].pTX->Frequency;
 			}

-			if (IS_MR_CHANNEL(gEeprom.ScreenChannel[vfo_num]))
-			{	// channel mode
+			if (gEeprom.ScreenChannel[vfo_num] <= MR_CHANNEL_LAST)
+			{	// it's a channel

 				// show the channel symbols
 				const uint8_t attributes = gMR_ChannelAttributes[gEeprom.ScreenChannel[vfo_num]];
@@ -535,12 +516,17 @@ void UI_DisplayMain(void)
 				if (attributes & MR_CH_SCANLIST2)
 					memmove(p_line0 + 120, BITMAP_ScanList2, sizeof(BITMAP_ScanList2));
 				#ifndef ENABLE_BIG_FREQ
-					#ifdef ENABLE_COMPANDER
-						if ((attributes & MR_CH_COMPAND) > 0)
-							memmove(p_line0 + 120 + LCD_WIDTH, BITMAP_compand, sizeof(BITMAP_compand));
-					#endif
+					if ((attributes & MR_CH_COMPAND) > 0)
+						memmove(p_line0 + 120 + LCD_WIDTH, BITMAP_compand, sizeof(BITMAP_compand));
+				#else
+					
+					// TODO:  // find somewhere else to put the symbol
+				
 				#endif

+				#pragma GCC diagnostic push
+				#pragma GCC diagnostic ignored "-Wimplicit-fallthrough="
+
 				switch (gEeprom.CHANNEL_DISPLAY_MODE)
 				{
 					case MDF_FREQUENCY:	// show the channel frequency
@@ -590,6 +576,8 @@ void UI_DisplayMain(void)

 						break;
 				}
+				
+				#pragma GCC diagnostic pop
 			}
 			else
 			{	// frequency mode
@@ -605,16 +593,14 @@ void UI_DisplayMain(void)
 					UI_PrintString(String, 32, 0, line, 8);
 				#endif

-				#ifdef ENABLE_COMPANDER
-					// show the channel symbols
-					const uint8_t attributes = gMR_ChannelAttributes[gEeprom.ScreenChannel[vfo_num]];
-					if ((attributes & MR_CH_COMPAND) > 0)
-						#ifdef ENABLE_BIG_FREQ
-							memmove(p_line0 + 120, BITMAP_compand, sizeof(BITMAP_compand));
-						#else
-							memmove(p_line0 + 120 + LCD_WIDTH, BITMAP_compand, sizeof(BITMAP_compand));
-						#endif
-				#endif
+				// show the channel symbols
+				const uint8_t attributes = gMR_ChannelAttributes[gEeprom.ScreenChannel[vfo_num]];
+				if ((attributes & MR_CH_COMPAND) > 0)
+					#ifdef ENABLE_BIG_FREQ
+						memmove(p_line0 + 120, BITMAP_compand, sizeof(BITMAP_compand));
+					#else
+						memmove(p_line0 + 120 + LCD_WIDTH, BITMAP_compand, sizeof(BITMAP_compand));
+					#endif
 			}
 		}

@@ -642,23 +628,7 @@ void UI_DisplayMain(void)
 				#endif
 			}

-			if (Level >= 1)
-			{
-				uint8_t *p_line = p_line1 + LCD_WIDTH;
-					memmove(p_line +  0, BITMAP_Antenna,       sizeof(BITMAP_Antenna));
-				if (Level >= 2)
-					memmove(p_line +  5, BITMAP_AntennaLevel1, sizeof(BITMAP_AntennaLevel1));
-				if (Level >= 3)
-					memmove(p_line +  8, BITMAP_AntennaLevel2, sizeof(BITMAP_AntennaLevel2));
-				if (Level >= 4)
-					memmove(p_line + 11, BITMAP_AntennaLevel3, sizeof(BITMAP_AntennaLevel3));
-				if (Level >= 5)
-					memmove(p_line + 14, BITMAP_AntennaLevel4, sizeof(BITMAP_AntennaLevel4));
-				if (Level >= 6)
-					memmove(p_line + 17, BITMAP_AntennaLevel5, sizeof(BITMAP_AntennaLevel5));
-				if (Level >= 7)
-					memmove(p_line + 20, BITMAP_AntennaLevel6, sizeof(BITMAP_AntennaLevel6));
-			}
+			UI_drawBars(p_line1 + LCD_WIDTH, Level);
 		}

 		// ************
@@ -673,7 +643,7 @@ void UI_DisplayMain(void)
 			const FREQ_Config_t *pConfig = (mode == 1) ? gEeprom.VfoInfo[vfo_num].pTX : gEeprom.VfoInfo[vfo_num].pRX;
 			const unsigned int code_type = pConfig->CodeType;
 			const char *code_list[] = {"", "CT", "DCS", "DCR"};
-			if (code_type >= 0 && code_type < ARRAY_SIZE(code_list))
+			if (code_type < ARRAY_SIZE(code_list))
 				strcpy(String, code_list[code_type]);
 		}
 		UI_PrintStringSmall(String, LCD_WIDTH + 24, 0, line + 1);
@@ -682,7 +652,7 @@ void UI_DisplayMain(void)
 		{	// show the TX power
 			const char pwr_list[] = "LMH";
 			const unsigned int i = gEeprom.VfoInfo[vfo_num].OUTPUT_POWER;
-			String[0] = (i >= 0 && i < ARRAY_SIZE(pwr_list)) ? pwr_list[i] : '\0';
+			String[0] = (i < ARRAY_SIZE(pwr_list)) ? pwr_list[i] : '\0';
 			String[1] = '\0';
 			UI_PrintStringSmall(String, LCD_WIDTH + 46, 0, line + 1);
 		}
@@ -736,10 +706,14 @@ void UI_DisplayMain(void)
 		#endif

 		#if defined(ENABLE_AM_FIX) && defined(ENABLE_AM_FIX_SHOW_DATA)
-			if (rx && gEeprom.VfoInfo[gEeprom.RX_CHANNEL].AM_mode && gSetting_AM_fix)
+			if (rx && gEeprom.VfoInfo[gEeprom.RX_VFO].AM_mode && gSetting_AM_fix)
 			{
+				if (gScreenToDisplay != DISPLAY_MAIN ||
+					gDTMF_CallState != DTMF_CALL_STATE_NONE)
+					return;
+
 				center_line = CENTER_LINE_AM_FIX_DATA;
-				AM_fix_print_data(gEeprom.RX_CHANNEL, String);
+				AM_fix_print_data(gEeprom.RX_VFO, String);
 				UI_PrintStringSmall(String, 2, 0, 3);
 			}
 			else
@@ -749,7 +723,7 @@ void UI_DisplayMain(void)
 			if (rx)
 			{
 				center_line = CENTER_LINE_RSSI;
-				UI_DisplayRSSIBar(gCurrentRSSI[gEeprom.RX_CHANNEL], false);
+				UI_DisplayRSSIBar(gCurrentRSSI[gEeprom.RX_VFO], false);
 			}
 			else
 		#endif
@@ -761,7 +735,13 @@ void UI_DisplayMain(void)
 				{	// show live DTMF decode
 					const unsigned int len = strlen(gDTMF_RX_live);
 					const unsigned int idx = (len > (17 - 5)) ? len - (17 - 5) : 0;  // limit to last 'n' chars
+
+					if (gScreenToDisplay != DISPLAY_MAIN ||
+						gDTMF_CallState != DTMF_CALL_STATE_NONE)
+						return;
+						
 					center_line = CENTER_LINE_DTMF_DEC;
+					
 					strcpy(String, "DTMF ");
 					strcat(String, gDTMF_RX_live + idx);
 					UI_PrintStringSmall(String, 2, 0, 3);
@@ -771,7 +751,13 @@ void UI_DisplayMain(void)
 				{	// show live DTMF decode
 					const unsigned int len = gDTMF_RX_index;
 					const unsigned int idx = (len > (17 - 5)) ? len - (17 - 5) : 0;  // limit to last 'n' chars
+
+					if (gScreenToDisplay != DISPLAY_MAIN ||
+						gDTMF_CallState != DTMF_CALL_STATE_NONE)
+						return;
+
 					center_line = CENTER_LINE_DTMF_DEC;
+					
 					strcpy(String, "DTMF ");
 					strcat(String, gDTMF_RX + idx);
 					UI_PrintStringSmall(String, 2, 0, 3);
@@ -782,7 +768,12 @@ void UI_DisplayMain(void)
 				else
 				if (gChargingWithTypeC)
 				{	// charging .. show the battery state
+					if (gScreenToDisplay != DISPLAY_MAIN ||
+						gDTMF_CallState != DTMF_CALL_STATE_NONE)
+						return;
+						
 					center_line = CENTER_LINE_CHARGE_DATA;
+					
 					sprintf(String, "Charge %u.%02uV %u%%",
 						gBatteryVoltageAverage / 100, gBatteryVoltageAverage % 100,
 						BATTERY_VoltsToPercent(gBatteryVoltageAverage));
--- a/ui/main.h
+++ b/ui/main.h
@@ -17,6 +17,19 @@
 #ifndef UI_MAIN_H
 #define UI_MAIN_H

+enum center_line_t {
+	CENTER_LINE_NONE = 0,
+	CENTER_LINE_IN_USE,
+	CENTER_LINE_AUDIO_BAR,
+	CENTER_LINE_RSSI,
+	CENTER_LINE_AM_FIX_DATA,
+	CENTER_LINE_DTMF_DEC,
+	CENTER_LINE_CHARGE_DATA
+};
+typedef enum center_line_t center_line_t;
+
+extern center_line_t center_line;
+
 void UI_DisplayAudioBar(void);
 void UI_UpdateRSSI(const int16_t rssi, const int vfo);
 void UI_DisplayMain(void);
--- a/ui/menu.c
+++ b/ui/menu.c
@@ -18,6 +18,7 @@
 #include <stdlib.h>  // abs()

 #include "app/dtmf.h"
+#include "app/menu.h"
 #include "bitmaps.h"
 #include "board.h"
 #include "dcs.h"
@@ -42,97 +43,97 @@ const t_menu_item MenuList[] =
 {
 //   text,     voice ID,                               menu ID

-	{"SQL",    VOICE_ID_SQUELCH,                       MENU_SQL        },
-	{"STEP",   VOICE_ID_FREQUENCY_STEP,                MENU_STEP       },
-	{"T PWR",  VOICE_ID_POWER,                         MENU_TXP        }, // was "TXP"
-	{"R DCS",  VOICE_ID_DCS,                           MENU_R_DCS      }, // was "R_DCS"
-	{"R CTCS", VOICE_ID_CTCSS,                         MENU_R_CTCS     }, // was "R_CTCS"
-	{"T DCS",  VOICE_ID_DCS,                           MENU_T_DCS      }, // was "T_DCS"
-	{"T CTCS", VOICE_ID_CTCSS,                         MENU_T_CTCS     }, // was "T_CTCS"
-	{"T DIR",  VOICE_ID_TX_OFFSET_FREQUENCY_DIRECTION, MENU_SFT_D      }, // was "SFT_D"
-	{"T OFFS", VOICE_ID_TX_OFFSET_FREQUENCY,           MENU_OFFSET     }, // was "OFFSET"
-	{"T VFO",  VOICE_ID_INVALID,                       MENU_XB         }, // was "WX"
-	{"T TOUT", VOICE_ID_TRANSMIT_OVER_TIME,            MENU_TOT        }, // was "TOT"
-	{"W/N",    VOICE_ID_CHANNEL_BANDWIDTH,             MENU_W_N        },
-	{"SCRAM",  VOICE_ID_SCRAMBLER_ON,                  MENU_SCR        }, // was "SCR"
-	{"BUSYCL", VOICE_ID_BUSY_LOCKOUT,                  MENU_BCL        }, // was "BCL"
-	{"CH SAV", VOICE_ID_MEMORY_CHANNEL,                MENU_MEM_CH     }, // was "MEM-CH"
-	{"CH DEL", VOICE_ID_DELETE_CHANNEL,                MENU_DEL_CH     }, // was "DEL-CH"
-	{"CH NAM", VOICE_ID_INVALID,                       MENU_MEM_NAME   },
-	{"CH DIS", VOICE_ID_INVALID,                       MENU_MDF        }, // was "MDF"
-	{"BATSAV", VOICE_ID_SAVE_MODE,                     MENU_SAVE       }, // was "SAVE"
-	{"VOX",    VOICE_ID_VOX,                           MENU_VOX        },
-	{"BLT",    VOICE_ID_INVALID,                       MENU_ABR        }, // was "ABR"
-	{"BLT RX", VOICE_ID_INVALID,                       MENU_ABR_ON_RX  },
-	{"DUALRX", VOICE_ID_DUAL_STANDBY,                  MENU_TDR        }, // was "TDR"
-	{"BEEP",   VOICE_ID_BEEP_PROMPT,                   MENU_BEEP       },
+	{"SQL",    VOICE_ID_SQUELCH,                       MENU_SQL           },
+	{"STEP",   VOICE_ID_FREQUENCY_STEP,                MENU_STEP          },
+	{"T PWR",  VOICE_ID_POWER,                         MENU_TXP           }, // was "TXP"
+	{"R DCS",  VOICE_ID_DCS,                           MENU_R_DCS         }, // was "R_DCS"
+	{"R CTCS", VOICE_ID_CTCSS,                         MENU_R_CTCS        }, // was "R_CTCS"
+	{"T DCS",  VOICE_ID_DCS,                           MENU_T_DCS         }, // was "T_DCS"
+	{"T CTCS", VOICE_ID_CTCSS,                         MENU_T_CTCS        }, // was "T_CTCS"
+	{"T DIR",  VOICE_ID_TX_OFFSET_FREQUENCY_DIRECTION, MENU_SFT_D         }, // was "SFT_D"
+	{"T OFFS", VOICE_ID_TX_OFFSET_FREQUENCY,           MENU_OFFSET        }, // was "OFFSET"
+	{"T VFO",  VOICE_ID_INVALID,                       MENU_XB            }, // was "WX"
+	{"T TOUT", VOICE_ID_TRANSMIT_OVER_TIME,            MENU_TOT           }, // was "TOT"
+	{"W/N",    VOICE_ID_CHANNEL_BANDWIDTH,             MENU_W_N           },
+	{"SCRAM",  VOICE_ID_SCRAMBLER_ON,                  MENU_SCR           }, // was "SCR"
+	{"BUSYCL", VOICE_ID_BUSY_LOCKOUT,                  MENU_BCL           }, // was "BCL"
+	{"CH SAV", VOICE_ID_MEMORY_CHANNEL,                MENU_MEM_CH        }, // was "MEM-CH"
+	{"CH DEL", VOICE_ID_DELETE_CHANNEL,                MENU_DEL_CH        }, // was "DEL-CH"
+	{"CH NAM", VOICE_ID_INVALID,                       MENU_MEM_NAME      },
+	{"CH DIS", VOICE_ID_INVALID,                       MENU_MDF           }, // was "MDF"
+	{"BATSAV", VOICE_ID_SAVE_MODE,                     MENU_SAVE          }, // was "SAVE"
+#ifdef ENABLE_VOX
+	{"VOX",    VOICE_ID_VOX,                           MENU_VOX           },
+#endif
+	{"BLT",    VOICE_ID_INVALID,                       MENU_ABR           }, // was "ABR"
+	{"BLTTRX", VOICE_ID_INVALID,                       MENU_ABR_ON_TX_RX  },
+	{"DUALRX", VOICE_ID_DUAL_STANDBY,                  MENU_TDR           }, // was "TDR"
+	{"BEEP",   VOICE_ID_BEEP_PROMPT,                   MENU_BEEP          },
 #ifdef ENABLE_VOICE
-	{"VOICE",  VOICE_ID_VOICE_PROMPT,                  MENU_VOICE      },
+	{"VOICE",  VOICE_ID_VOICE_PROMPT,                  MENU_VOICE         },
 #endif
-	{"SC REV", VOICE_ID_INVALID,                       MENU_SC_REV     },
-	{"KEYLOC", VOICE_ID_INVALID,                       MENU_AUTOLK     }, // was "AUTOLk"
-	{"S ADD1", VOICE_ID_INVALID,                       MENU_S_ADD1     },
-	{"S ADD2", VOICE_ID_INVALID,                       MENU_S_ADD2     },
-	{"STE",    VOICE_ID_INVALID,                       MENU_STE        },
-	{"RP STE", VOICE_ID_INVALID,                       MENU_RP_STE     },
-	{"MIC",    VOICE_ID_INVALID,                       MENU_MIC        },
+	{"SC REV", VOICE_ID_INVALID,                       MENU_SC_REV        },
+	{"KEYLOC", VOICE_ID_INVALID,                       MENU_AUTOLK        }, // was "AUTOLk"
+	{"S ADD1", VOICE_ID_INVALID,                       MENU_S_ADD1        },
+	{"S ADD2", VOICE_ID_INVALID,                       MENU_S_ADD2        },
+	{"STE",    VOICE_ID_INVALID,                       MENU_STE           },
+	{"RP STE", VOICE_ID_INVALID,                       MENU_RP_STE        },
+	{"MIC",    VOICE_ID_INVALID,                       MENU_MIC           },
 #ifdef ENABLE_AUDIO_BAR
-	{"MICBAR", VOICE_ID_INVALID,                       MENU_MIC_BAR    },
+	{"MICBAR", VOICE_ID_INVALID,                       MENU_MIC_BAR       },
 #endif
-#ifdef ENABLE_COMPANDER
-	{"COMPND", VOICE_ID_INVALID,                       MENU_COMPAND    },
-#endif
-	{"1 CALL", VOICE_ID_INVALID,                       MENU_1_CALL     },
-	{"SLIST",  VOICE_ID_INVALID,                       MENU_S_LIST     },
-	{"SLIST1", VOICE_ID_INVALID,                       MENU_SLIST1     },
-	{"SLIST2", VOICE_ID_INVALID,                       MENU_SLIST2     },
+	{"COMPND", VOICE_ID_INVALID,                       MENU_COMPAND       },
+	{"1 CALL", VOICE_ID_INVALID,                       MENU_1_CALL        },
+	{"SLIST",  VOICE_ID_INVALID,                       MENU_S_LIST        },
+	{"SLIST1", VOICE_ID_INVALID,                       MENU_SLIST1        },
+	{"SLIST2", VOICE_ID_INVALID,                       MENU_SLIST2        },
 #ifdef ENABLE_ALARM
-	{"AL-MOD", VOICE_ID_INVALID,                       MENU_AL_MOD     },
+	{"AL-MOD", VOICE_ID_INVALID,                       MENU_AL_MOD        },
 #endif
-	{"ANI ID", VOICE_ID_ANI_CODE,                      MENU_ANI_ID     },
-	{"UPCODE", VOICE_ID_INVALID,                       MENU_UPCODE     },
-	{"DWCODE", VOICE_ID_INVALID,                       MENU_DWCODE     },
-	{"PTT ID", VOICE_ID_INVALID,                       MENU_PTT_ID     },
-	{"D ST",   VOICE_ID_INVALID,                       MENU_D_ST       },
-    {"D RSP",  VOICE_ID_INVALID,                       MENU_D_RSP      },
-	{"D HOLD", VOICE_ID_INVALID,                       MENU_D_HOLD     },
-	{"D PRE",  VOICE_ID_INVALID,                       MENU_D_PRE      },
-	{"D DCD",  VOICE_ID_INVALID,                       MENU_D_DCD      },
-	{"D LIST", VOICE_ID_INVALID,                       MENU_D_LIST     },
-	{"D LIVE", VOICE_ID_INVALID,                       MENU_D_LIVE_DEC }, // live DTMF decoder
-	{"PONMSG", VOICE_ID_INVALID,                       MENU_PONMSG     },
-	{"ROGER",  VOICE_ID_INVALID,                       MENU_ROGER      },
-	{"BATVOL", VOICE_ID_INVALID,                       MENU_VOL        }, // was "VOL"
-	{"BATTXT", VOICE_ID_INVALID,                       MENU_BAT_TXT    },
-	{"MODE",   VOICE_ID_INVALID,                       MENU_AM         }, // was "AM"
+	{"ANI ID", VOICE_ID_ANI_CODE,                      MENU_ANI_ID        },
+	{"UPCODE", VOICE_ID_INVALID,                       MENU_UPCODE        },
+	{"DWCODE", VOICE_ID_INVALID,                       MENU_DWCODE        },
+	{"PTT ID", VOICE_ID_INVALID,                       MENU_PTT_ID        },
+	{"D ST",   VOICE_ID_INVALID,                       MENU_D_ST          },
+    {"D RSP",  VOICE_ID_INVALID,                       MENU_D_RSP         },
+	{"D HOLD", VOICE_ID_INVALID,                       MENU_D_HOLD        },
+	{"D PRE",  VOICE_ID_INVALID,                       MENU_D_PRE         },
+	{"D DCD",  VOICE_ID_INVALID,                       MENU_D_DCD         },
+	{"D LIST", VOICE_ID_INVALID,                       MENU_D_LIST        },
+	{"D LIVE", VOICE_ID_INVALID,                       MENU_D_LIVE_DEC    }, // live DTMF decoder
+	{"PONMSG", VOICE_ID_INVALID,                       MENU_PONMSG        },
+	{"ROGER",  VOICE_ID_INVALID,                       MENU_ROGER         },
+	{"BATVOL", VOICE_ID_INVALID,                       MENU_VOL           }, // was "VOL"
+	{"BATTXT", VOICE_ID_INVALID,                       MENU_BAT_TXT       },
+	{"MODE",   VOICE_ID_INVALID,                       MENU_AM            }, // was "AM"
 #ifdef ENABLE_AM_FIX
-	{"AM FIX", VOICE_ID_INVALID,                       MENU_AM_FIX     },
+	{"AM FIX", VOICE_ID_INVALID,                       MENU_AM_FIX        },
 #endif
 #ifdef ENABLE_AM_FIX_TEST1
-	{"AM FT1", VOICE_ID_INVALID,                       MENU_AM_FIX_TEST1},
+	{"AM FT1", VOICE_ID_INVALID,                       MENU_AM_FIX_TEST1  },
 #endif
 #ifdef ENABLE_NOAA
-	{"NOAA-S", VOICE_ID_INVALID,                       MENU_NOAA_S     },
+	{"NOAA-S", VOICE_ID_INVALID,                       MENU_NOAA_S        },
 #endif
-	{"RESET",  VOICE_ID_INITIALISATION,                MENU_RESET      }, // might be better to move this to the hidden menu items ?
+	{"RESET",  VOICE_ID_INITIALISATION,                MENU_RESET         }, // might be better to move this to the hidden menu items ?

 	// hidden menu items from here on
 	// enabled if pressing both the PTT and upper side button at power-on

-	{"F LOCK", VOICE_ID_INVALID,                       MENU_F_LOCK     },
-	{"TX 200", VOICE_ID_INVALID,                       MENU_200TX      }, // was "200TX"
-	{"TX 350", VOICE_ID_INVALID,                       MENU_350TX      }, // was "350TX"
-	{"TX 500", VOICE_ID_INVALID,                       MENU_500TX      }, // was "500TX"
-	{"350 EN", VOICE_ID_INVALID,                       MENU_350EN      }, // was "350EN"
-	{"SCR EN", VOICE_ID_INVALID,                       MENU_SCREN      }, // was "SCREN"
+	{"F LOCK", VOICE_ID_INVALID,                       MENU_F_LOCK        },
+	{"TX 200", VOICE_ID_INVALID,                       MENU_200TX         }, // was "200TX"
+	{"TX 350", VOICE_ID_INVALID,                       MENU_350TX         }, // was "350TX"
+	{"TX 500", VOICE_ID_INVALID,                       MENU_500TX         }, // was "500TX"
+	{"350 EN", VOICE_ID_INVALID,                       MENU_350EN         }, // was "350EN"
+	{"SCR EN", VOICE_ID_INVALID,                       MENU_SCREN         }, // was "SCREN"

-	{"TX EN",  VOICE_ID_INVALID,                       MENU_TX_EN      }, // enable TX
+	{"TX EN",  VOICE_ID_INVALID,                       MENU_TX_EN         }, // enable TX
 #ifdef ENABLE_F_CAL_MENU
-	{"F CALI", VOICE_ID_INVALID,                       MENU_F_CALI     }, // reference xtal calibration
+	{"F CALI", VOICE_ID_INVALID,                       MENU_F_CALI        }, // reference xtal calibration
 #endif
-	{"BATCAL", VOICE_ID_INVALID,                       MENU_BATCAL     }, // battery voltage calibration
+	{"BATCAL", VOICE_ID_INVALID,                       MENU_BATCAL        }, // battery voltage calibration

-	{"",       VOICE_ID_INVALID,                       0xff            }  // end of list - DO NOT delete or move this this
+	{"",       VOICE_ID_INVALID,                       0xff               }  // end of list - DO NOT delete or move this this
 };

 const char gSubMenu_TXP[3][5] =
@@ -194,7 +195,7 @@ const char gSubMenu_CHAN[3][10] =

 const char gSubMenu_XB[3][10] =
 {
-	"MAIN\nVFO",
+	"RX\nVFO",
 	"UPPER\nVFO",
 	"LOWER\nVFO"
 };
@@ -239,12 +240,13 @@ const char gSubMenu_D_RSP[4][11] =
 	"BOTH"
 };

-const char gSubMenu_PTT_ID[4][7] =
+const char gSubMenu_PTT_ID[5][15] =
 {
 	"OFF",
-	"KEY UP",
-	"KEY DN",
-	"BOTH"
+	"KEY\nUP",
+	"KEY\nDOWN",
+	"KEY\nUP+DOWN",
+	"APOLLO\nQUINDAR"
 };

 const char gSubMenu_PONMSG[4][8] =
@@ -290,15 +292,13 @@ const char gSubMenu_BACKLIGHT[8][7] =
 	"ON"
 };

-#ifdef ENABLE_COMPANDER
-	const char gSubMenu_Compand[4][6] =
-	{
-		"OFF",
-		"TX",
-		"RX",
-		"TX/RX"
-	};
-#endif
+const char gSubMenu_RX_TX[4][6] =
+{
+	"OFF",
+	"TX",
+	"RX",
+	"TX/RX"
+};

 #ifdef ENABLE_AM_FIX_TEST1
 	const char gSubMenu_AM_fix_test1[4][8] =
@@ -437,6 +437,9 @@ void UI_DisplayMenu(void)

 	bool already_printed = false;

+	#pragma GCC diagnostic push
+	#pragma GCC diagnostic ignored "-Wimplicit-fallthrough="
+
 	switch (gMenuCursor)
 	{
 		case MENU_SQL:
@@ -557,12 +560,14 @@ void UI_DisplayMenu(void)
 			#endif
 			break;

-		case MENU_VOX:
-			if (gSubMenuSelection == 0)
-				strcpy(String, "OFF");
-			else
-				sprintf(String, "%d", gSubMenuSelection);
-			break;
+		#ifdef ENABLE_VOX
+			case MENU_VOX:
+				if (gSubMenuSelection == 0)
+					strcpy(String, "OFF");
+				else
+					sprintf(String, "%d", gSubMenuSelection);
+				break;
+		#endif

 		case MENU_ABR:
 			strcpy(String, gSubMenu_BACKLIGHT[gSubMenuSelection]);
@@ -583,16 +588,14 @@ void UI_DisplayMenu(void)
 			strcpy(String, (gSubMenuSelection == 0) ? "OFF" : "AUTO");
 			break;

-		#ifdef ENABLE_COMPANDER
-			case MENU_COMPAND:
-				strcpy(String, gSubMenu_Compand[gSubMenuSelection]);
-				break;
-		#endif
+		case MENU_COMPAND:
+		case MENU_ABR_ON_TX_RX:
+			strcpy(String, gSubMenu_RX_TX[gSubMenuSelection]);
+			break;

 		#ifdef ENABLE_AM_FIX
 			case MENU_AM_FIX:
 		#endif
-		case MENU_ABR_ON_RX:
 		case MENU_BCL:
 		case MENU_BEEP:
 		case MENU_S_ADD1:
@@ -710,7 +713,10 @@ void UI_DisplayMenu(void)
 			break;

 		case MENU_S_LIST:
-			sprintf(String, "LIST%u", gSubMenuSelection);
+			if (gSubMenuSelection < 2)
+				sprintf(String, "LIST%u", 1 + gSubMenuSelection);
+			else
+				strcpy(String, "ALL");
 			break;

 		#ifdef ENABLE_ALARM
@@ -787,8 +793,7 @@ void UI_DisplayMenu(void)
 					const uint32_t value   = 22656 + gSubMenuSelection;
 					const uint32_t xtal_Hz = (0x4f0000u + value) * 5;

-					//gEeprom.BK4819_XTAL_FREQ_LOW = gSubMenuSelection;  // already set when the user was adjusting the value
-					BK4819_WriteRegister(BK4819_REG_3B, value);
+					writeXtalFreqCal(gSubMenuSelection, false);

 					sprintf(String, "%d\n%u.%06u\nMHz",
 						gSubMenuSelection,
@@ -805,6 +810,8 @@ void UI_DisplayMenu(void)
 		}
 	}

+	#pragma GCC diagnostic pop
+
 	if (!already_printed)
 	{	// we now do multi-line text in a single string

--- a/ui/menu.h
+++ b/ui/menu.h
@@ -49,9 +49,11 @@ enum
 	MENU_MEM_NAME,
 	MENU_MDF,
 	MENU_SAVE,
+#ifdef ENABLE_VOX
 	MENU_VOX,
+#endif
 	MENU_ABR,
-	MENU_ABR_ON_RX,
+	MENU_ABR_ON_TX_RX,
 	MENU_TDR,
 	MENU_BEEP,
 #ifdef ENABLE_VOICE
@@ -67,9 +69,7 @@ enum
 #ifdef ENABLE_AUDIO_BAR
 	MENU_MIC_BAR,
 #endif
-#ifdef ENABLE_COMPANDER
 	MENU_COMPAND,
-#endif
 	MENU_1_CALL,
 	MENU_S_LIST,
 	MENU_SLIST1,
@@ -139,15 +139,13 @@ extern const char        gSubMenu_MDF[4][15];
 	extern const char    gSubMenu_AL_MOD[2][5];
 #endif
 extern const char        gSubMenu_D_RSP[4][11];
-extern const char        gSubMenu_PTT_ID[4][7];
+extern const char        gSubMenu_PTT_ID[5][15];
 extern const char        gSubMenu_PONMSG[4][8];
 extern const char        gSubMenu_ROGER[3][9];
 extern const char        gSubMenu_RESET[2][4];
 extern const char        gSubMenu_F_LOCK[6][4];
 extern const char        gSubMenu_BACKLIGHT[8][7];
-#ifdef ENABLE_COMPANDER
-	extern const char    gSubMenu_Compand[4][6];
-#endif
+extern const char        gSubMenu_RX_TX[4][6];
 #ifdef ENABLE_AM_FIX_TEST1
 	extern const char    gSubMenu_AM_fix_test1[4][8];
 #endif
--- a/ui/status.c
+++ b/ui/status.c
@@ -28,6 +28,7 @@
 #include "helper/battery.h"
 #include "misc.h"
 #include "settings.h"
+#include "ui/battery.h"
 #include "ui/helper.h"
 #include "ui/ui.h"
 #include "ui/status.h"
@@ -94,12 +95,26 @@ void UI_DisplayStatus(const bool test_display)
 		else
 	#endif
 		// SCAN indicator
-		if (gScanState != SCAN_OFF || gScreenToDisplay == DISPLAY_SCANNER || test_display)
+		if (gScanStateDir != SCAN_OFF || gScreenToDisplay == DISPLAY_SCANNER || test_display)
 		{
-			memmove(line + x, BITMAP_SC, sizeof(BITMAP_SC));
-			x1 = x + sizeof(BITMAP_SC);
+			if (gNextMrChannel <= MR_CHANNEL_LAST)
+			{	// channel mode
+				if (gEeprom.SCAN_LIST_DEFAULT == 0)
+					UI_PrintStringSmallBuffer("1", line + x);
+				else
+				if (gEeprom.SCAN_LIST_DEFAULT == 1)
+					UI_PrintStringSmallBuffer("2", line + x);
+				else
+				if (gEeprom.SCAN_LIST_DEFAULT == 2)
+					UI_PrintStringSmallBuffer("*", line + x);
+			}
+			else
+			{	// frequency mode
+				UI_PrintStringSmallBuffer("S", line + x);
+			}
+			x1 = x + 7;
 		}
-	x += sizeof(BITMAP_SC);
+	x += 7;  // font character width

 	#ifdef ENABLE_VOICE
 		// VOICE indicator
@@ -131,13 +146,15 @@ void UI_DisplayStatus(const bool test_display)
 	}
 	x += sizeof(BITMAP_XB);
 	
-	// VOX indicator
-	if (gEeprom.VOX_SWITCH || test_display)
-	{
-		memmove(line + x, BITMAP_VOX, sizeof(BITMAP_VOX));
-		x1 = x + sizeof(BITMAP_VOX);
-	}
-	x += sizeof(BITMAP_VOX);
+	#ifdef ENABLE_VOX
+		// VOX indicator
+		if (gEeprom.VOX_SWITCH || test_display)
+		{
+			memmove(line + x, BITMAP_VOX, sizeof(BITMAP_VOX));
+			x1 = x + sizeof(BITMAP_VOX);
+		}
+		x += sizeof(BITMAP_VOX);
+	#endif

 	// KEY-LOCK indicator
 	if (gEeprom.KEY_LOCK || test_display)
@@ -201,35 +218,7 @@ void UI_DisplayStatus(const bool test_display)
 	x += sizeof(BITMAP_USB_C);

 	// BATTERY LEVEL indicator
-	if (gBatteryDisplayLevel >= 2 && !gLowBattery)
-	{
-		line += x;
-		memmove(line, BITMAP_BatteryLevel1, sizeof(BITMAP_BatteryLevel1));
-
-		#ifndef ENABLE_REVERSE_BAT_SYMBOL
-			line += sizeof(BITMAP_BatteryLevel1);
-			if (gBatteryDisplayLevel >= 2)
-				memmove(line -  4, BITMAP_BatteryLevel, sizeof(BITMAP_BatteryLevel));
-			if (gBatteryDisplayLevel >= 3)
-				memmove(line -  7, BITMAP_BatteryLevel, sizeof(BITMAP_BatteryLevel));
-			if (gBatteryDisplayLevel >= 4)
-				memmove(line - 10, BITMAP_BatteryLevel, sizeof(BITMAP_BatteryLevel));
-			if (gBatteryDisplayLevel >= 5)
-				memmove(line - 13, BITMAP_BatteryLevel, sizeof(BITMAP_BatteryLevel));
-		#else
-			if (gBatteryDisplayLevel >= 2)
-				memmove(line +  3, BITMAP_BatteryLevel, sizeof(BITMAP_BatteryLevel));
-			if (gBatteryDisplayLevel >= 3)
-				memmove(line +  6, BITMAP_BatteryLevel, sizeof(BITMAP_BatteryLevel));
-			if (gBatteryDisplayLevel >= 4)
-				memmove(line +  9, BITMAP_BatteryLevel, sizeof(BITMAP_BatteryLevel));
-			if (gBatteryDisplayLevel >= 5)
-				memmove(line + 12, BITMAP_BatteryLevel, sizeof(BITMAP_BatteryLevel));
-		#endif
-	}
-	else
-	if (gLowBatteryBlink == 1)
-		memmove(line + x, BITMAP_BatteryLevel1, sizeof(BITMAP_BatteryLevel1));
+	UI_DrawBattery(line + x, gBatteryDisplayLevel, gLowBattery);
 	
 	// **************

--- a/ui/ui.c
+++ b/ui/ui.c
@@ -77,33 +77,28 @@ void GUI_DisplayScreen(void)

 void GUI_SelectNextDisplay(GUI_DisplayType_t Display)
 {
-	if (Display != DISPLAY_INVALID)
+	if (Display == DISPLAY_INVALID)
+		return;
+
+	if (gScreenToDisplay != Display)
 	{
-		if (gScreenToDisplay != Display)
-		{
-			gInputBoxIndex      = 0;
-			gIsInSubMenu        = false;
-			gCssScanMode        = CSS_SCAN_MODE_OFF;
-			gScanState          = SCAN_OFF;
-			#ifdef ENABLE_FMRADIO
-				gFM_ScanState   = FM_SCAN_OFF;
-			#endif
-			gAskForConfirmation = 0;
-			gDTMF_InputMode     = false;
-			gDTMF_InputIndex    = 0;
-			gAskToSave          = false;
-			gAskToDelete        = false;
+		DTMF_clear_input_box();

-			if (gWasFKeyPressed)
-			{
-				gWasFKeyPressed = false;
-				gUpdateStatus   = true;
-			}
+		gInputBoxIndex       = 0;
+		gIsInSubMenu         = false;
+		gCssScanMode         = CSS_SCAN_MODE_OFF;
+		gScanStateDir        = SCAN_OFF;
+		#ifdef ENABLE_FMRADIO
+			gFM_ScanState    = FM_SCAN_OFF;
+		#endif
+		gAskForConfirmation  = 0;
+		gAskToSave           = false;
+		gAskToDelete         = false;
+		gWasFKeyPressed      = false;

-			gUpdateStatus       = true;
-		}
-
-		gUpdateDisplay   = true;
-		gScreenToDisplay = Display;
+		gUpdateStatus        = true;
 	}
+
+	gScreenToDisplay = Display;
+	gUpdateDisplay   = true;
 }
--- a/utils/main.cpp
+++ b/utils/main.cpp
@@ -93,15 +93,29 @@ void create_gain_table(const char *filename)
 		mixer_dB[orig_mixer] +
 		pga_dB[orig_pga];

-	const uint8_t lna_short_min = 0;  // 0
-	const uint8_t lna_min       = 0;  // 0
-	const uint8_t mixer_min     = 0;  // 0
-	const uint8_t pga_min       = 0;  // 0
+	#if 1
+		// full table
+		const uint8_t lna_short_min = 0;  // 0
+		const uint8_t lna_min       = 0;  // 0
+		const uint8_t mixer_min     = 0;  // 0
+		const uint8_t pga_min       = 0;  // 0

-	const uint8_t lna_short_max = 3;  // 3
-	const uint8_t lna_max       = 7;  // 5
-	const uint8_t mixer_max     = 3;  // 3
-	const uint8_t pga_max       = 7;  // 7
+		const uint8_t lna_short_max = 3;  // 3
+		const uint8_t lna_max       = 7;  // 5
+		const uint8_t mixer_max     = 3;  // 3
+		const uint8_t pga_max       = 7;  // 7
+	#else
+		// just one register changes
+		const uint8_t lna_short_min = 0;
+		const uint8_t lna_min       = 2;
+		const uint8_t mixer_min     = 3;
+		const uint8_t pga_min       = 6;
+
+		const uint8_t lna_short_max = 3;
+		const uint8_t lna_max       = 2;
+		const uint8_t mixer_max     = 3;
+		const uint8_t pga_max       = 6;
+	#endif

 	uint8_t lna_short = lna_short_min;
 	uint8_t lna       = lna_min;
@@ -244,37 +258,90 @@ void create_gain_table(const char *filename)
 		return;

 	fprintf(file, "\n");
-	fprintf(file, "\tconst t_am_fix_gain_table am_fix_gain_table[] =\n");
+	fprintf(file, "\tstatic const t_am_fix_gain_table am_fix_gain_table[] =\n");
 	fprintf(file, "\t{\n");
-	fprintf(file, "\t\t{.lna_short = 3, .lna = 2, .mixer = 3, .pga = 6},      //  0 0dB -14dB  0dB  -3dB .. -17dB original\n\n");

-	for (unsigned int i = 0; i < gain_table.size(); i++)
+	#if 0
+		fprintf(file, "\t\t{.lna_short = 3, .lna = 2, .mixer = 3, .pga = 6},      //  0 0dB -14dB  0dB  -3dB .. -17dB original\n\n");
+
+		for (unsigned int i = 0; i < gain_table.size(); i++)
+		{
+			char s[1024];
+
+			const t_gain_table entry = gain_table[i];
+
+			sprintf(s, "\t\t{%u, %u, %u, %u},         // %3u .. %3ddB %3ddB %2ddB %3ddB .. %3ddB",
+				entry.lna_short,
+				entry.lna,
+				entry.mixer,
+				entry.pga,
+				1 + i,
+				entry.lna_short_dB,
+				entry.lna_dB,
+				entry.mixer_dB,
+				entry.pga_dB,
+				entry.sum_dB);
+
+			if (i == original_index)
+				strcat(s, " original");
+
+			fprintf(file, "%s\n", s);
+		}
+	#else
 	{
-		char s[1024];
+		//BK4819_WriteRegister(BK4819_REG_13, ((uint16_t)gains.lna_short << 8) | ((uint16_t)gains.lna << 5) | ((uint16_t)gains.mixer << 3) | ((uint16_t)gains.pga << 0));

-		const t_gain_table entry = gain_table[i];
+		uint16_t reg_val;
+		int16_t  sum_dB;

-		sprintf(s, "\t\t{%u, %u, %u, %u},         // %3u .. %3ddB %3ddB %2ddB %3ddB .. %3ddB",
-			entry.lna_short,
-			entry.lna,
-			entry.mixer,
-			entry.pga,
-			1 + i,
-			entry.lna_short_dB,
-			entry.lna_dB,
-			entry.mixer_dB,
-			entry.pga_dB,
-			entry.sum_dB);
+		reg_val = ((uint16_t)orig_lna_short << 8) | ((uint16_t)orig_lna << 5) | ((uint16_t)orig_mixer << 3) | ((uint16_t)orig_pga << 0);
+		sum_dB  = lna_short_dB[orig_lna_short] + lna_dB[orig_lna] + mixer_dB[orig_mixer] + pga_dB[orig_pga];
+		fprintf(file, "\t\t{0x%04X, %-3d},       //   0 ..   %u %u %u %u .. 0dB -14dB  0dB  -3dB .. -17dB original\n\n",
+			reg_val,
+			sum_dB,
+			orig_lna_short,
+			orig_lna,
+			orig_mixer,
+			orig_pga);

-		if (i == original_index)
-			strcat(s, " original");
+		for (unsigned int i = 0; i < gain_table.size(); i++)
+		{
+			char s[1024];

-		fprintf(file, "%s\n", s);
+			const t_gain_table entry = gain_table[i];
+
+			reg_val = ((uint16_t)entry.lna_short << 8) | ((uint16_t)entry.lna << 5) | ((uint16_t)entry.mixer << 3) | ((uint16_t)entry.pga << 0);
+			sum_dB  = lna_short_dB[entry.lna_short] + lna_dB[entry.lna] + mixer_dB[entry.mixer] + pga_dB[entry.pga];
+
+			sprintf(s, "\t\t{0x%04X, %-3d},         // %3u .. %u %u %u %u .. %3ddB %3ddB %2ddB %3ddB .. %3ddB",
+				reg_val,
+				sum_dB,
+
+				1 + i,
+
+				entry.lna_short,
+				entry.lna,
+				entry.mixer,
+				entry.pga,
+
+				entry.lna_short_dB,
+				entry.lna_dB,
+				entry.mixer_dB,
+				entry.pga_dB,
+
+				entry.sum_dB);
+
+			if (i == original_index)
+				strcat(s, " original");
+
+			fprintf(file, "%s\n", s);
+		}
 	}
+	#endif

 	fprintf(file, "\t};\n\n");

-	fprintf(file, "\tconst unsigned int original_index = %u;\n", 1 + original_index);
+	fprintf(file, "\tstatic const unsigned int original_index = %u;\n", 1 + original_index);

 	fclose(file);
 }
--- a/utils/misc.exe
+++ b/utils/misc.exe
--- a/utils/uv-k5_small_bold.bin
+++ b/utils/uv-k5_small_bold.bin
--- a/utils/uv-k5_small_bold.fon
+++ b/utils/uv-k5_small_bold.fon
--- a/version.c
+++ b/version.c
@@ -4,7 +4,7 @@
 #ifdef GIT_HASH
 	#define VER     GIT_HASH
 #else
-	#define VER     "231002"
+	#define VER     "231004"
 #endif

 #ifndef ONE_OF_ELEVEN_VER
Author	SHA1	Message	Date
Krzysiek Egzmont	063dc61e65	Part of the recent changes form 1o11, including DTMF input box error #19	2023-10-09 21:47:06 +02:00
Krzysiek Egzmont	60ccd3372f	FIX #8 : This should fix compiler errors	2023-10-09 17:17:45 +02:00
Krzysiek Egzmont	149a0f5bdc	Revert do not update battery level when TX	2023-10-09 16:57:52 +02:00
Krzysiek Egzmont	c7da7cf725	Battery symbol fix	2023-10-09 16:30:20 +02:00
Krzysiek Egzmont	4b9147327a	Fix random upper/lower for TX, bring back TX on last RX	2023-10-09 16:02:57 +02:00
Krzysiek Egzmont	43f4790f5b	BUG FIX #15 : shifted numbers in spectrum freq input box	2023-10-06 19:57:08 +02:00
Krzysiek Egzmont	43ccce33da	README: new build instructions	2023-10-06 12:15:01 +02:00
Krzysiek Egzmont	b2839de2a5	Merge remote-tracking branch 'remotes/OneOfEleven/main'	2023-10-06 11:28:19 +02:00
OneOfEleven	5397b3ee88	Fixed key number offset bug added yesterday	2023-10-06 07:48:45 +01:00
OneOfEleven	9a0a75446a	README.md	2023-10-06 00:19:21 +01:00
OneOfEleven	f25e0230f0	Added power-on compile option	2023-10-06 00:18:47 +01:00
OneOfEleven	16c908f0bf	Channel/Frequency scanning updates	2023-10-05 23:58:55 +01:00
OneOfEleven	9c7d6a38e5	Remember scan ALL channels option across power cycles	2023-10-05 22:59:26 +01:00
OneOfEleven	ec5e9dde66	Squelch tuning	2023-10-05 22:44:44 +01:00
OneOfEleven	5c346c8466	Fic typing in keys bug	2023-10-05 17:38:25 +01:00
OneOfEleven	40d09591b3	Fixed silly error I made	2023-10-05 16:28:20 +01:00
OneOfEleven	bd9f337a5b	Make all warnings vanish over to bricky's house !	2023-10-05 15:26:08 +01:00
OneOfEleven	cb05a5881f	Try again to calm the type warnings	2023-10-05 14:40:34 +01:00
OneOfEleven	6b44659419	Mzybe clear up some signed/unsigned compile warnings	2023-10-05 14:33:05 +01:00
Krzysiek Egzmont	81f18aa281	build errors fix	2023-10-05 15:10:12 +02:00
Krzysiek Egzmont	410c0e47cb	Merge remote-tracking branch 'remotes/OneOfEleven/main'	2023-10-05 15:05:54 +02:00
OneOfEleven	2372949eb9	RX bandwidth and squelch update	2023-10-05 13:42:14 +01:00
OneOfEleven	0cf4e1fe36	Merge pull request #123 from bricky149/clang-build Add support for clang builds	2023-10-05 12:44:47 +01:00
OneOfEleven	9b2ce88a72	RX fixed bandwidth adjustments + squelch sensitivity adjustments	2023-10-05 12:42:40 +01:00
bricky149	a23f359735	Add support for clang builds	2023-10-05 12:22:09 +01:00
OneOfEleven	b343993a72	Don't use fast scan option - for now	2023-10-05 10:19:50 +01:00
OneOfEleven	4d8db8f0b9	Updated 5/7 function key operation (see README.md)	2023-10-05 10:03:07 +01:00
OneOfEleven	609df5f279	Ignore all long-press/function keys whilst in menu	2023-10-05 09:17:38 +01:00
OneOfEleven	e042b21e65	Rename RX_CHANNEL and TX_CHANNEL to RX_VFO and TX_VFO to be much less confusing	2023-10-05 01:07:04 +01:00
OneOfEleven	d632698428	Clean up copy-chan-to-vfo	2023-10-05 00:26:37 +01:00
OneOfEleven	eba4bf9c80	Fix copy-chan-to-vfo	2023-10-05 00:07:35 +01:00
OneOfEleven	56fc929921	Let copy-chan-to-vfo work when dual-watch enabled	2023-10-05 00:01:13 +01:00
Krzysiek Egzmont	2cff29e6db	Merge remote-tracking branch 'remotes/OneOfEleven/main'	2023-10-05 00:11:29 +02:00
Krzysiek Egzmont	ced053ba63	Merge remote-tracking branch 'remotes/OneOfEleven/main'	2023-10-05 00:10:14 +02:00
OneOfEleven	a6324ffcf8	Fix for when channel scan has no scanlisted channels to scan	2023-10-04 23:09:55 +01:00
OneOfEleven	6e7f8b1877	Update README.md with new function key operations list	2023-10-04 22:56:54 +01:00
OneOfEleven	74a9adcdbd	Merge pull request #119 from bricky149/gc-sections Retain space saving benefits when not using LTO	2023-10-04 22:35:54 +01:00
bricky149	4a05e69e19	Retain space saving benefits when not using LTO	2023-10-04 22:24:07 +01:00
OneOfEleven	1cfb59fa38	Scanlist now 1, 2 or all channels	2023-10-04 22:08:13 +01:00
Krzysiek Egzmont	bee4a8c41a	Merge remote-tracking branch 'remotes/OneOfEleven/main'	2023-10-04 22:35:03 +02:00
OneOfEleven	fe949d2ae3	Sanity check on DTMF hold time	2023-10-04 21:29:35 +01:00
Krzysiek Egzmont	292181a9a6	struct padding fixed in spectrum	2023-10-04 22:29:26 +02:00
Krzysiek Egzmont	654145bd07	Merge remote-tracking branch 'remotes/OneOfEleven/main'	2023-10-04 22:28:24 +02:00
OneOfEleven	5900d46edb	Disable the weak signal auto RX bandwidth reduction - test	2023-10-04 21:18:02 +01:00
OneOfEleven	1dbe874240	Slightly reduced tone amplitude - to reduce deviation level	2023-10-04 20:34:57 +01:00
OneOfEleven	eea1756dc0	Disable padding flag - causing problems with structures that need no padding	2023-10-04 20:14:01 +01:00
OneOfEleven	32fad129cc	Modify scanlist top status bar symbol	2023-10-04 20:05:00 +01:00
OneOfEleven	6a8c7d5b37	Modify scanlist symbol on status bar (SL-1 / SL-2)	2023-10-04 19:11:19 +01:00
OneOfEleven	efca16088b	Merge branch 'main' of https://github.com/OneOfEleven/uv-k5-firmware-custom	2023-10-04 19:01:09 +01:00
OneOfEleven	814e5edb07	Toggle scankists update	2023-10-04 19:01:00 +01:00
OneOfEleven	abfcf15aca	Merge pull request #113 from egzumer/batcal Update all battery bar level values on battery calibration	2023-10-04 19:00:09 +01:00
OneOfEleven	a113d41c1a	Merge branch 'main' of https://github.com/OneOfEleven/uv-k5-firmware-custom	2023-10-04 18:54:41 +01:00
OneOfEleven	b26b1fab95	Scanlist update	2023-10-04 18:54:26 +01:00
OneOfEleven	2242c4097a	Merge pull request #114 from bricky149/struct-padding -Wpadded, reorder struct fields, saves 400 bytes	2023-10-04 18:52:56 +01:00
bricky149	74c37451bf	-Wpadding, reorder struct fields, saves 400 bytes	2023-10-04 18:35:51 +01:00
Krzysiek Egzmont	59c4c4dcd3	Merge branch 'batcal'	2023-10-04 18:49:02 +02:00
Krzysiek Egzmont	eec8e22e41	Update all battery bar level values on battery calibration	2023-10-04 18:35:50 +02:00
OneOfEleven	429ac36ffe	Backlight TX/RX menu update	2023-10-04 16:37:11 +01:00
OneOfEleven	567b0cfa83	Compander bug fixed, found by two other people :)	2023-10-04 14:55:58 +01:00
OneOfEleven	f4b637b51a	Added VOX enable/disable compile option	2023-10-04 11:57:34 +01:00
OneOfEleven	5f2e069437	Rename AF constant	2023-10-04 10:01:07 +01:00
OneOfEleven	9d990f7e67	Fix 1750Hz key bug	2023-10-04 00:45:03 +01:00
OneOfEleven	eaccdab1d4	1750Hz tone side key now a momentary action (press to TX tone, release to stop TX tone)	2023-10-04 00:15:01 +01:00
OneOfEleven	6e2ba5c214	Updated README.md	2023-10-03 23:33:28 +01:00
OneOfEleven	4d808de2ac	Added Copy-channel-to-VFO - long press 'M' key (menu key)	2023-10-03 23:33:01 +01:00
OneOfEleven	8fb9825ad8	More efficient AM fix table and code	2023-10-03 20:03:04 +01:00
OneOfEleven	4b17aa6d3f	serial comms TX lockout bug fix	2023-10-03 19:19:40 +01:00