diff --git a/Makefile b/Makefile
index 01a7a2f..50953d6 100644
--- a/Makefile
+++ b/Makefile
@@ -16,6 +16,7 @@ ENABLE_TX_WHEN_AM             := 0
 ENABLE_CTCSS_TAIL_PHASE_SHIFT := 1
 ENABLE_MAIN_KEY_HOLD          := 1
 ENABLE_BOOT_BEEPS             := 1
+ENABLE_COMPANDER              := 1
 #ENABLE_SINGLE_VFO_CHAN       := 1
 #ENABLE_BAND_SCOPE            := 1
 
@@ -132,7 +133,6 @@ ifeq ($(ENABLE_OVERLAY),1)
 endif
 
 #CFLAGS = -Os -Wall -Werror -mcpu=cortex-m0 -fno-builtin -fshort-enums -fno-delete-null-pointer-checks -std=c11 -MMD
-#CFLAGS = -O2 -Wall -Werror -mcpu=cortex-m0 -fno-builtin -fshort-enums -fno-delete-null-pointer-checks -std=c11 -MMD -fdata-sections -ffunction-sections
 CFLAGS = -Os -Wall -Werror -mcpu=cortex-m0 -fno-builtin -fshort-enums -fno-delete-null-pointer-checks -std=c11 -MMD -fdata-sections -ffunction-sections
 CFLAGS += -DPRINTF_INCLUDE_CONFIG_H
 CFLAGS += -DGIT_HASH=\"$(GIT_HASH)\"
@@ -181,6 +181,9 @@ endif
 ifeq ($(ENABLE_BOOT_BEEPS),1)
 	CFLAGS  += -DENABLE_BOOT_BEEPS
 endif
+ifeq ($(ENABLE_COMPANDER),1)
+	CFLAGS  += -DENABLE_COMPANDER
+endif
 ifeq ($(ENABLE_SINGLE_VFO_CHAN),1)
 	CFLAGS  += -DENABLE_SINGLE_VFO_CHAN
 endif
diff --git a/README.md b/README.md
index 4b132a2..4c25972 100644
--- a/README.md
+++ b/README.md
@@ -27,6 +27,7 @@ ENABLE_TX_WHEN_AM             := 0       allow TX when RX set to AM
 ENABLE_CTCSS_TAIL_PHASE_SHIFT := 1       use CTCSS tail phase shift rather than QS's 55Hz tone method 
 ENABLE_MAIN_KEY_HOLD          := 1       keys 0-9 can be held down to bypass having to press the F-key
 ENABLE_BOOT_BEEPS             := 1       gives the user some audio feedback on the volume level knob position at boot-up
+ENABLE_COMPANDER              := 1       compander menu option - not yet fully operational
 #ENABLE_SINGLE_VFO_CHAN       := 1       not yet implemented
 #ENABLE_BAND_SCOPE            := 1       not yet implemented
 ```
diff --git a/app/action.c b/app/action.c
index accdc7c..632fd4a 100644
--- a/app/action.c
+++ b/app/action.c
@@ -56,7 +56,8 @@ void ACTION_Power(void)
 	if (++gTxVfo->OUTPUT_POWER > OUTPUT_POWER_HIGH)
 		gTxVfo->OUTPUT_POWER = OUTPUT_POWER_LOW;
 
-	gRequestSaveChannel   = 1;
+	//gRequestSaveChannel = 1;
+	gRequestSaveChannel = 2;     // TODO: fix me
 
 	#ifdef ENABLE_VOICE
 		gAnotherVoiceID   = VOICE_ID_POWER;
@@ -77,8 +78,8 @@ static void ACTION_Monitor(void)
 		#endif
 		
 		RADIO_SetupRegisters(true);
-		APP_StartListening(FUNCTION_MONITOR);
 
+		APP_StartListening(FUNCTION_MONITOR);
 		return;
 	}
 
diff --git a/app/main.c b/app/main.c
index 8402f7b..c128a4a 100644
--- a/app/main.c
+++ b/app/main.c
@@ -33,6 +33,9 @@
 #include "ui/inputbox.h"
 #include "ui/ui.h"
 
+// TEST ONLY
+#include "driver/bk4819.h"
+
 //#ifndef ARRAY_SIZE
 //	#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
 //#endif
diff --git a/app/menu.c b/app/menu.c
index cef66db..1df6f80 100644
--- a/app/menu.c
+++ b/app/menu.c
@@ -187,6 +187,9 @@ int MENU_GetLimits(uint8_t Cursor, uint8_t *pMin, uint8_t *pMax)
 			*pMax = 50;
 			break;
 			
+		#ifdef ENABLE_COMPANDER
+			case MENU_COMPAND:
+		#endif
 		case MENU_W_N:
 		case MENU_BCL:
 		case MENU_BEEP:
@@ -495,6 +498,13 @@ void MENU_AcceptSetting(void)
 			gFlagReconfigureVfos = true;
 			return;
 	
+		#ifdef ENABLE_COMPANDER
+			case MENU_COMPAND:
+				gTxVfo->Compander = gSubMenuSelection;
+				//gRequestSaveChannel = 2;
+				return;
+		#endif
+
 		case MENU_1_CALL:
 			gEeprom.CHAN_1_CALL = gSubMenuSelection;
 			break;
@@ -821,6 +831,12 @@ void MENU_ShowCurrentSetting(void)
 			gSubMenuSelection = gEeprom.MIC_SENSITIVITY;
 			break;
 	
+		#ifdef ENABLE_COMPANDER
+			case MENU_COMPAND:
+				gSubMenuSelection = gTxVfo->Compander;
+				return;
+		#endif
+
 		case MENU_1_CALL:
 			gSubMenuSelection = gEeprom.CHAN_1_CALL;
 			break;
diff --git a/driver/bk4819.c b/driver/bk4819.c
index 10e1cb9..a323a42 100644
--- a/driver/bk4819.c
+++ b/driver/bk4819.c
@@ -384,7 +384,7 @@ void BK4819_EnableVox(uint16_t VoxEnableThreshold, uint16_t VoxDisableThreshold)
 	BK4819_WriteRegister(BK4819_REG_7A, 0x289A); // vox disable delay = 128*5 = 640ms
 
 	// Enable VOX
-	BK4819_WriteRegister(BK4819_REG_31, REG_31_Value | 4u); // bit 2 - VOX Enable
+	BK4819_WriteRegister(BK4819_REG_31, REG_31_Value | (1u << 2));    // VOX Enable
 }
 
 void BK4819_SetFilterBandwidth(BK4819_FilterBandwidth_t Bandwidth)
@@ -509,16 +509,33 @@ void BK4819_PickRXFilterPathBasedOnFrequency(uint32_t Frequency)
 void BK4819_DisableScramble(void)
 {
 	const uint16_t Value = BK4819_ReadRegister(BK4819_REG_31);
-	BK4819_WriteRegister(BK4819_REG_31, Value & 0xFFFD);
+	BK4819_WriteRegister(BK4819_REG_31, Value & ~(1u << 1));
 }
 
 void BK4819_EnableScramble(uint8_t Type)
 {
 	const uint16_t Value = BK4819_ReadRegister(BK4819_REG_31);
-	BK4819_WriteRegister(BK4819_REG_31, Value | 2u);
+	BK4819_WriteRegister(BK4819_REG_31, Value | (1u << 1));
+
 	BK4819_WriteRegister(BK4819_REG_71, 0x68DC + (Type * 1032));
 }
 
+bool BK4819_CompanderEnabled(void)
+{
+	return (BK4819_ReadRegister(BK4819_REG_31) & (1u < 3)) ? true : false;
+}
+void BK4819_DisableCompander(void)
+{
+	const uint16_t Value = BK4819_ReadRegister(BK4819_REG_31);
+	BK4819_WriteRegister(BK4819_REG_31, Value & ~(1u < 3));
+}
+
+void BK4819_EnableCompander(void)
+{
+	const uint16_t Value = BK4819_ReadRegister(BK4819_REG_31);
+	BK4819_WriteRegister(BK4819_REG_31, Value | (1u < 3));
+}
+
 void BK4819_DisableVox(void)
 {
 	const uint16_t Value = BK4819_ReadRegister(BK4819_REG_31);
@@ -675,9 +692,9 @@ void BK4819_EnterDTMF_TX(bool bLocalLoopback)
 	BK4819_WriteRegister(BK4819_REG_70,
 		0
 		| BK4819_REG_70_MASK_ENABLE_TONE1
-		| (83 << BK4819_REG_70_SHIFT_TONE1_TUNING_GAIN)
+		| (83u << BK4819_REG_70_SHIFT_TONE1_TUNING_GAIN)
 		| BK4819_REG_70_MASK_ENABLE_TONE2
-		| (83 << BK4819_REG_70_SHIFT_TONE2_TUNING_GAIN));
+		| (83u << BK4819_REG_70_SHIFT_TONE2_TUNING_GAIN));
 
 	BK4819_EnableTXLink();
 }
diff --git a/driver/bk4819.h b/driver/bk4819.h
index 4927e4d..178afa2 100644
--- a/driver/bk4819.h
+++ b/driver/bk4819.h
@@ -84,6 +84,11 @@ void     BK4819_RX_TurnOn(void);
 void     BK4819_PickRXFilterPathBasedOnFrequency(uint32_t Frequency);
 void     BK4819_DisableScramble(void);
 void     BK4819_EnableScramble(uint8_t Type);
+
+bool     BK4819_CompanderEnabled(void);
+void     BK4819_DisableCompander(void);
+void     BK4819_EnableCompander(void);
+
 void     BK4819_DisableVox(void);
 void     BK4819_DisableDTMF(void);
 void     BK4819_EnableDTMF(void);
diff --git a/driver/st7565.c b/driver/st7565.c
index 4b8ee89..46fdd25 100644
--- a/driver/st7565.c
+++ b/driver/st7565.c
@@ -23,6 +23,9 @@
 #include "driver/st7565.h"
 #include "driver/system.h"
 
+#define LCD_WIDTH       128
+#define LCD_HEIGHT       64
+
 uint8_t gStatusLine[128];
 uint8_t gFrameBuffer[7][128];
 
@@ -96,7 +99,7 @@ void ST7565_BlitStatusLine(void)
 
 	SPI_ToggleMasterMode(&SPI0->CR, false);
 
-	ST7565_WriteByte(0x40);
+	ST7565_WriteByte(0x40);    // start line ?
 
 	ST7565_SelectColumnAndLine(4, 0);
 
@@ -141,36 +144,35 @@ void ST7565_Init(void)
 
 	SPI_ToggleMasterMode(&SPI0->CR, false);
 
-	// RESET command
-	ST7565_WriteByte(0xE2);
+	ST7565_WriteByte(0xE2);   // internal reset
 
 	SYSTEM_DelayMs(120);
 
-	ST7565_WriteByte(0xA2);
-	ST7565_WriteByte(0xC0);
-	ST7565_WriteByte(0xA1);
-	ST7565_WriteByte(0xA6);
-	ST7565_WriteByte(0xA4);
-	ST7565_WriteByte(0x24);
-	ST7565_WriteByte(0x81);
-	ST7565_WriteByte(0x1F);
-	ST7565_WriteByte(0x2B);
+	ST7565_WriteByte(0xA2);   // bias 9
+	ST7565_WriteByte(0xC0);   // com normal
+	ST7565_WriteByte(0xA1);   // reverse ?
+	ST7565_WriteByte(0xA6);   // normal ?
+	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);
 
-	ST7565_WriteByte(0x2E);
+	ST7565_WriteByte(0x2E);   // power control ?
 
 	SYSTEM_DelayMs(1);
 
-	ST7565_WriteByte(0x2F);
-	ST7565_WriteByte(0x2F);
-	ST7565_WriteByte(0x2F);
-	ST7565_WriteByte(0x2F);
+	ST7565_WriteByte(0x2F);   //
+	ST7565_WriteByte(0x2F);   //
+	ST7565_WriteByte(0x2F);   //
+	ST7565_WriteByte(0x2F);   //
 
 	SYSTEM_DelayMs(40);
 
-	ST7565_WriteByte(0x40);
-	ST7565_WriteByte(0xAF);
+	ST7565_WriteByte(0x40);   // start line ?
+	ST7565_WriteByte(0xAF);   // display on ?
 
 	SPI_WaitForUndocumentedTxFifoStatusBit();
 
diff --git a/firmware b/firmware
index 354e164..3f087f5 100644
Binary files a/firmware and b/firmware differ
diff --git a/firmware.bin b/firmware.bin
index d1662e3..1bbcd63 100644
Binary files a/firmware.bin and b/firmware.bin differ
diff --git a/firmware.packed.bin b/firmware.packed.bin
index 5e64482..ad79b0d 100644
Binary files a/firmware.packed.bin and b/firmware.packed.bin differ
diff --git a/radio.c b/radio.c
index 0a6c25e..a3fcc83 100644
--- a/radio.c
+++ b/radio.c
@@ -129,7 +129,10 @@ void RADIO_InitInfo(VFO_Info_t *pInfo, uint8_t ChannelSave, uint8_t Band, uint32
 	pInfo->pRX                     = &pInfo->ConfigRX;
 	pInfo->pTX                     = &pInfo->ConfigTX;
 	pInfo->FREQUENCY_OF_DEVIATION  = 1000000;
-
+	#ifdef ENABLE_COMPANDER
+		pInfo->Compander           = false;
+	#endif
+	
 	if (ChannelSave == (FREQ_CHANNEL_FIRST + BAND2_108MHz))
 	{
 		pInfo->AM_CHANNEL_MODE = true;
@@ -312,7 +315,7 @@ void RADIO_ConfigureChannel(uint8_t VFO, uint32_t Arg)
 		{
 			gEeprom.VfoInfo[VFO].FrequencyReverse  = false;
 			gEeprom.VfoInfo[VFO].CHANNEL_BANDWIDTH = 0;
-			gEeprom.VfoInfo[VFO].OUTPUT_POWER      = 2;
+			gEeprom.VfoInfo[VFO].OUTPUT_POWER      = OUTPUT_POWER_LOW;
 			gEeprom.VfoInfo[VFO].BUSY_CHANNEL_LOCK = false;
 		}
 		else
@@ -406,6 +409,10 @@ void RADIO_ConfigureChannel(uint8_t VFO, uint32_t Arg)
 	else
 		gEeprom.VfoInfo[VFO].IsAM = false;
 
+	#ifdef ENABLE_COMPANDER
+		gEeprom.VfoInfo[VFO].Compander = false;
+	#endif
+
 	RADIO_ConfigureSquelchAndOutputPower(pRadio);
 }
 
@@ -676,6 +683,13 @@ void RADIO_SetupRegisters(bool bSwitchToFunction0)
 	else
 		BK4819_DisableVox();
 
+	#ifdef ENABLE_COMPANDER
+		if (gRxVfo->Compander)
+			BK4819_EnableCompander();
+		else
+			BK4819_DisableCompander();
+	#endif
+
 	if (gRxVfo->IsAM || (!gRxVfo->DTMF_DECODING_ENABLE && !gSetting_KILLED))
 	{
 		BK4819_DisableDTMF();
@@ -757,6 +771,13 @@ void RADIO_SetTxParameters(void)
 
 	BK4819_SetFrequency(gCurrentVfo->pTX->Frequency);
 
+	#ifdef ENABLE_COMPANDER
+		if (gCurrentVfo->Compander)
+			BK4819_EnableCompander();
+		else
+			BK4819_DisableCompander();
+	#endif
+
 	BK4819_PrepareTransmit();
 
 	SYSTEM_DelayMs(10);
diff --git a/radio.h b/radio.h
index 3e995fa..54ca350 100644
--- a/radio.h
+++ b/radio.h
@@ -124,6 +124,9 @@ typedef struct VFO_Info_t
 	uint8_t        BUSY_CHANNEL_LOCK;
 	uint8_t        AM_CHANNEL_MODE;
 	bool           IsAM;
+	#ifdef ENABLE_COMPANDER
+		bool       Compander;
+	#endif
 	char           Name[16];
 } VFO_Info_t;
 
diff --git a/settings.c b/settings.c
index 9deb469..287ce25 100644
--- a/settings.c
+++ b/settings.c
@@ -190,7 +190,7 @@ void SETTINGS_SaveChannel(uint8_t Channel, uint8_t VFO, const VFO_Info_t *pVFO,
 			OffsetVFO += (Channel - FREQ_CHANNEL_FIRST) * 32;
 		}
 
-		if (Mode == 2 || !IS_MR_CHANNEL(Channel))
+		if (Mode >= 2 || !IS_MR_CHANNEL(Channel))
 		{
 			uint32_t State32[2];
 			uint8_t  State8[8];
diff --git a/ui/menu.c b/ui/menu.c
index 5d33350..5c573e1 100644
--- a/ui/menu.c
+++ b/ui/menu.c
@@ -63,6 +63,9 @@ const char MenuList[][7] =
 	"STE",
     "RP-STE",
 	"Mic",
+	#ifdef ENABLE_COMPANDER
+		"Compnd",
+	#endif
     "1-Call",
 	"S-List",
 	"SList1",
@@ -100,7 +103,7 @@ const char MenuList[][7] =
 	"350-EN",    // was "350EN"
 	"SCR-EN",    // was "SCREN"
 	
-	""           // indicate end of list
+	""           // end of list
 };
 
 #if 0
@@ -315,7 +318,7 @@ void UI_DisplayMenu(void)
 				sprintf(String, "+%u.%01udB", mic / 2, mic % 2);
 			}
 			break;
-	
+
 		case MENU_STEP:
 			sprintf(String, "%u.%02uKHz", gSubMenu_Step[gSubMenuSelection] / 100, gSubMenu_Step[gSubMenuSelection] % 100);
 			break;
@@ -410,6 +413,9 @@ void UI_DisplayMenu(void)
 			strcpy(String, (gSubMenuSelection == 0) ? "OFF" : "AUTO");
 			break;
 
+		#ifdef ENABLE_COMPANDER
+			case MENU_COMPAND:
+		#endif
 		case MENU_BCL:
 		case MENU_BEEP:
 		case MENU_S_ADD1:
diff --git a/ui/menu.h b/ui/menu.h
index 5537895..6734dc5 100644
--- a/ui/menu.h
+++ b/ui/menu.h
@@ -53,6 +53,9 @@ enum
 	MENU_STE,
 	MENU_RP_STE,
 	MENU_MIC,
+	#ifdef ENABLE_COMPANDER
+		MENU_COMPAND,
+	#endif
 	MENU_1_CALL,
 	MENU_S_LIST,
 	MENU_SLIST1,