From e212054774ccc6d957fcbe25867ebdd948076cdb Mon Sep 17 00:00:00 2001
From: Wayne Warthen <wwarthen@gmail.com>
Date: Fri, 6 Sep 2024 17:00:21 -0700
Subject: [PATCH 1/5] Fix Missing Video Device String

---
 Source/HBIOS/hbios.asm | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Source/HBIOS/hbios.asm b/Source/HBIOS/hbios.asm
index 37ae2ad3..2fd51b5a 100644
--- a/Source/HBIOS/hbios.asm
+++ b/Source/HBIOS/hbios.asm
@@ -7964,6 +7964,7 @@ PS_VDGDC	.TEXT	"GDC$"
 PS_VDTMS	.TEXT	"TMS$"
 PS_VDVGA	.TEXT	"VGA$"
 PS_VDVRC	.TEXT	"VRC$"
+PS_VDEF		.TEXT	"EF$"
 PS_VDFV		.TEXT	"FV$"
 ;
 ; VIDEO TYPE STRINGS

From 61d08e9f71c04a7ce75110a54356c1d933c76a96 Mon Sep 17 00:00:00 2001
From: drj113 <doug@doughq.com>
Date: Sat, 7 Sep 2024 10:18:07 +1000
Subject: [PATCH 2/5] GM7303 LCD Keypad support

Changes to support a modified Prolog Keypad and LCD driver card - Heavily inspired by the lcd.asm module, but separated out to allow for future keyboard support.
---
 Source/HBIOS/Build.cmd      |   2 +
 Source/HBIOS/Makefile.new   |   2 +-
 Source/HBIOS/cfg_gmz180.asm |   5 +-
 Source/HBIOS/gm7303.asm     | 316 ++++++++++++++++++++++++++++++++++++
 Source/HBIOS/hbios.asm      |  21 ++-
 5 files changed, 343 insertions(+), 3 deletions(-)
 create mode 100644 Source/HBIOS/gm7303.asm

diff --git a/Source/HBIOS/Build.cmd b/Source/HBIOS/Build.cmd
index 35162fd4..134ffe24 100644
--- a/Source/HBIOS/Build.cmd
+++ b/Source/HBIOS/Build.cmd
@@ -244,5 +244,7 @@ call Build EPITX std || exit /b
 call Build NABU std || exit /b
 call Build FZ80 std || exit /b
 call Build UNA std || exit /b
+call Build GMZ180 std || exit /b
+
 
 goto :eof
diff --git a/Source/HBIOS/Makefile.new b/Source/HBIOS/Makefile.new
index 16d7f26e..9beb9d79 100644
--- a/Source/HBIOS/Makefile.new
+++ b/Source/HBIOS/Makefile.new
@@ -5,7 +5,7 @@ DIST_OBJECTS := \
 	RCZ80_zrc_ram RCZ80_zrc512 RPH_std SBC_std SBC_simh MBC_std \
 	DUO_std SCZ180_sc126 SCZ180_sc130 SCZ180_sc131 SCZ180_sc140 \
 	SCZ180_sc503 SCZ180_sc700 S100_std UNA_std Z80RETRO_std \
-	ZETA_std ZETA2_std HEATH_std EPITX_std
+	ZETA_std ZETA2_std HEATH_std EPITX_std GMZ180_std
 #	RCZ80_mt RCZ80_duart MON_std 
 
 OBJECTS := $(DIST_OBJECTS)
diff --git a/Source/HBIOS/cfg_gmz180.asm b/Source/HBIOS/cfg_gmz180.asm
index c7a81604..e9524f0d 100644
--- a/Source/HBIOS/cfg_gmz180.asm
+++ b/Source/HBIOS/cfg_gmz180.asm
@@ -84,7 +84,7 @@ LEDMODE		.EQU	LEDMODE_STD	; LEDMODE_[STD|SC|RTC|NABU]
 LEDPORT		.EQU	$0E		; STATUS LED PORT ADDRESS
 LEDDISKIO	.EQU	TRUE		; ENABLES DISK I/O ACTIVITY ON STATUS LED
 ;
-DSKYENABLE	.EQU	FALSE		; ENABLES DSKY FUNCTIONALITY
+DSKYENABLE	.EQU	FALSE  	; ENABLES DSKY FUNCTIONALITY
 DSKYDSKACT	.EQU	FALSE		; ENABLES DISK ACTIVITY ON DSKY DISPLAY
 ICMENABLE	.EQU	FALSE		; ENABLES ORIGINAL DSKY ICM DRIVER (7218)
 ICMPPIBASE	.EQU	$60		; BASE I/O ADDRESS OF ICM PPI
@@ -95,6 +95,9 @@ H8PENABLE	.EQU	FALSE		; ENABLES HEATH H8 FRONT PANEL
 LCDENABLE	.EQU	FALSE		; ENABLE LCD DISPLAY
 LCDBASE		.EQU	$DA		; BASE I/O ADDRESS OF LCD CONTROLLER
 LCDDSKACT	.EQU	TRUE		; ENABLES DISK ACTIVITY ON LCD DISPLAY
+GM7303ENABLE	.EQU  TRUE        ; ENABLES THE PROLOG 7303 BOARD WITH 16X2 LCD
+GM7303BASE	.EQU  $30         ; BASE ADDRESS FOR GM3703 BOARD  
+GM7303DSKACT	.EQU  TRUE  ; ENABLE DISK ACTIVITY OF GM7303 LCD DISPLAY
 ;
 BOOTCON		.EQU	0		; BOOT CONSOLE DEVICE
 SECCON		.EQU	$FF		; SECONDARY CONSOLE DEVICE
diff --git a/Source/HBIOS/gm7303.asm b/Source/HBIOS/gm7303.asm
new file mode 100644
index 00000000..a0f7430e
--- /dev/null
+++ b/Source/HBIOS/gm7303.asm
@@ -0,0 +1,316 @@
+;
+;==================================================================================================
+; HARDWARE SUPPORT FOR GENESS MODULES 7303 STD BUS KEYBOARD/GM7303
+;  - INCORPORATES HITACHI HD44780 AS 2 X 16 DISPLAY AND 24 KEY HEX KEYPAD
+;==================================================================================================
+; 
+; Heavily derived from the lcd.asm driver, but forked because the 7303 card has keyboard 
+; functionality as well.  Eventually will be used as a Z80/180 monitor tool
+;
+; The GM7303 supports an LCD display while the original has 2 DL1416 starburst displays. 
+;==================================================================================================
+;
+; CARD FUNCTIONS:	(BASE_IO = 0x30)
+;
+; 20X2 LCD 		0X30 OUTPUT (D0-D7)
+;			0X31 OUTPUT (D0 - LCD E)
+;					(D1 - LCD R/W*)
+;					(D2 - LCD RS)
+; S1 & S2 INPUT	0x30 INPUT  (BIT 6,7)
+; 8 OUTPUT LEDS	0x30 OUTPUT 
+; KEYBOARD		0X30 OUTPUT (COLUMN BIT 0-3)
+;			0X30 INPUT  (ROW BIT 0-5)
+;
+;===================================================================================================
+;
+;  Date		Change
+;  05Sep2024	Initial development - basic init functions
+;  06Sep2024 	Working - Cleaned out functions that wont be used - TODO - Implement keyboard
+;
+;
+GM7303_DATA	.EQU	GM7303BASE + 0	; WRITE
+GM7303_CTRL	.EQU	GM7303BASE + 1	; WRITE
+GM7303_KYBD	.EQU	GM7303BASE + 0	; READ/WRITE
+;
+GM7303_FUNC_CLEAR	.EQU	$01		; CLEAR DISPLAY
+GM7303_FUNC_HOME	.EQU	$02		; HOME CURSOR & REMOVE ALL SHIFTING
+GM7303_FUNC_ENTRY	.EQU	$04		; SET CUR DIR AND DISPLAY SHIFT
+GM7303_FUNC_DISP	.EQU	$08		; DISP, CUR, BLINK ON/OFF
+GM7303_FUNC_SHIFT	.EQU	$10		; MOVE CUR / SHIFT DISP
+GM7303_FUNC_SET	.EQU	$20		; SET INTERFACE PARAMS
+GM7303_FUNC_CGADR	.EQU	$40		; SET CGRAM ADRESS
+GM7303_FUNC_DDADR	.EQU	$80		; SET DDRAM ADDRESS
+;
+	DEVECHO	"GM7303: IO="
+	DEVECHO	GM7303BASE
+	DEVECHO	"\n"
+;
+; HARDWARE RESET PRIOR TO ROMWBW CONSOLE INITIALIZATION
+;
+GM7303_PREINIT:
+	
+; TEST FOR PRESENCE...
+	CALL	GM7303_DETECT		; PROBE FOR HARDWARE
+	LD	A,(GM7303_PRESENT)		; GET PRESENCE FLAG
+	OR	A			; SET FLAGS
+	RET	Z			; BAIL OUT IF NOT PRESENT	; RESET GM7303 CONTROLLER, DELAYS ARE FIXED, 
+
+; INITIALISE LCD
+	CALL	GM7303_RESET	; RESET THE LCD
+	PUSH 	HL
+	LD	HL,GM7303_INIT_TBL
+	LD	D,04H             ; 4 BYTES TO SEND
+NEXT_INIT:
+	LD	A,(HL)		; GET COMMAND
+	OUT	(GM7303_DATA),A	; WRITE TO TO DISPLAY
+	CALL	CMD_STROBE		; COMMAND STROBE
+	PUSH	DE
+	LD	DE,5000/16		; WAIT >4MS, WE USE 5MS
+	CALL	VDELAY		; DO IT
+	POP	DE
+	INC	HL
+	DEC	D			; (D)=00 -> COMMAND
+	JR	NZ,NEXT_INIT	;   NO - DO NEXT INIT COMMAND
+	POP  HL
+;
+; PUT SOMETHING ON THE DISPLAY
+	LD	DE,GM7303_STR_BAN	; DISPLAY BANNER
+	CALL	GM7303_OUTDS
+
+; SECOND LINE
+	LD	HL,$0100		; ROW 2, COL 0
+	CALL	GM7303_GOTORC
+	LD	DE,GM7303_STR_CFG	; DISPLAY CONFIG
+	CALL	GM7303_OUTDS
+
+	XOR	A			; SIGNAL SUCCESS
+	RET				; DONE
+;
+; POST CONSOLE INITIALIZATION
+;
+GM7303_INIT:
+	CALL	NEWLINE			; FORMATTING
+	PRTS("GM7303: IO=$")
+	LD	A,GM7303BASE
+	CALL	PRTHEXBYTE
+;
+	LD	A,(GM7303_PRESENT)		; GET PRESENCE FLAG
+	OR	A			; SET FLAGS
+	JR	Z,GM7303_INIT1		; HANDLE NOT PRESENT
+	XOR	A			; SIGNAL SUCCESS
+	RET				; DONE
+;
+GM7303_INIT1:
+	PRTS(" NOT PRESENT$")
+	OR	$FF
+	RET
+;
+; CALLED FROM HBIOS RIGHT BEFORE A DISK ACCESS
+;   HL: ADDRESS OF 32-BIT SECTOR NUMBER (LITTLE-ENDIAN)
+;
+; FORMAT: "Dsk99 R:12345678"
+;          0123456789012345
+;
+GM7303_DSKACT:
+	; SAVE EVERYTHING
+	PUSH	AF
+	PUSH	BC
+	PUSH	DE
+	PUSH	HL
+;
+	LD	A,(GM7303_PRESENT)	; GET PRESENCE FLAG
+	OR	A				; SET FLAGS
+	JR	Z,GM7303_DSKACT_Z		; HANDLE NOT PRESENT
+;
+	PUSH	HL
+	LD	HL,$0100			; ROW 1, COL 0
+	CALL	GM7303_GOTORC		; SET DISPLAY ADDRESS
+	POP	HL
+;
+	LD	DE,GM7303_STR_IO		; PREFIX
+	CALL	GM7303_OUTDS		; SEND TO DISPLAY (COLS 0-5)
+
+	LD	A,(HB_DSKUNIT)		; GET DISK UNIT NUM
+	CALL	GM7303_DSKACT_BYTE	; SEND TO DISPLAY (COLS 6-7) HEX???
+;
+	LD	A,' '			; SEPARATOR
+	CALL	GM7303_OUTD		; SEND TO DISPLAY (COL 8)
+;
+	LD	A,(HB_DSKFUNC)	; ACTIVE DISK FUNCTION
+	CP	BF_DIOWRITE		; WRITE?
+	LD	A,'W'			; ASSUME WRITE
+	JR	Z,GM7303_DSKACT0	; GO AHEAD
+	LD	A,'R'			; OTHERWISE READ
+GM7303_DSKACT0:
+	CALL	GM7303_OUTD		; SEND CHAR (COL 10)
+
+	LD	A,':'			; SEPARATOR
+	CALL	GM7303_OUTD		; SEND TO DISPLAY (COL 11)
+;
+	LD	A,3			; POINT TO
+	CALL	ADDHLA		; END OF DWORD (MSB)
+	LD	B,4			; DO 4 BYTES
+;
+GM7303_DSKACT1:
+	LD	A,(HL)			; GET BYTE
+	CALL	GM7303_DSKACT_BYTE	; SEND TO DISPLAY (COLS 12-19)
+	DEC	HL				; DEC PTR
+	DJNZ	GM7303_DSKACT1		; DO ALL 4 BYTES
+;
+GM7303_DSKACT_Z:
+	; CLEAN UP AND GO AWAY
+	POP	HL
+	POP	DE
+	POP	BC
+	POP	AF
+	RET
+;;
+GM7303_DSKACT_BYTE:
+	PUSH	AF			; SAVE BYTE
+	RRCA				; DO TOP NIBBLE FIRST
+	RRCA
+	RRCA
+	RRCA
+	CALL	HEXCONV		; CONVERT NIBBLE TO ASCII
+	CALL	GM7303_OUTD		; SEND TO DISPLAY
+	POP	AF			; RECOVER CURRENT BYTE
+	CALL	HEXCONV		; CONVERT NIBBLE TO ASCII
+	CALL	GM7303_OUTD		; SEND TO DISPLAY
+	RET				; DONE
+
+
+; DETECT PRESENCE OF GM7303 CONTROLLER 
+; WE CAN'T USE CONTROLLER RAM AS THE GM7303 DOES NOT SUPPORT LCD READS
+; SIMPLY TEST FOR THE EXISTANCE OF BUS PULLDOWN AT THE SWITCH PORT
+;
+GM7303_DETECT:
+	IN	A,(GM7303_DATA)	; GET VALUE OF DATA INPUTS 
+	CP	00			; GM7303 PULLS DATA TO GROUND
+	JR	Z,GM7303_AVAILABLE
+GM7303_MISSING:
+	LD	A,00
+	LD	(GM7303_PRESENT),A
+	RET
+GM7303_AVAILABLE:
+	LD	A,$FF
+	LD	(GM7303_PRESENT),A
+	RET
+;
+; DELAY ROUTINE
+;
+GM7303_DELAY:
+	PUSH	AF
+	PUSH	DE
+	LD	DE,3		; WAIT PERIOD
+	CALL	VDELAY	; DO IT
+	POP	DE
+	POP	AF
+	RET	
+
+
+	
+CMD_STROBE:		;  Send a command to the LCD
+	LD	A,01H	;  (A) = (X,X,X,X,X,RS,R/W*, E)
+			;  SET R/W* LINE low (BIT 1=0)
+			;  SET RS line LOW FOR COMMAND (BIT 2=0)
+			;  SET ENABLE LINE HIGH (BIT 0=1)
+	; CARRY ON THROUGH THE STROBE ROUTINE
+STROBE:
+	OR	01H               ;  SET ENABLE LINE HIGH (BIT 0=1)
+	OUT 	(GM7303_CTRL),A
+	CALL	GM7303_DELAY
+	
+	XOR	01H               ;  SET ENABLE LINE LOW (BIT 0=0)
+	OUT 	(GM7303_CTRL),A
+	CALL	GM7303_DELAY
+	RET                   ;  EXIT
+								   
+GM7303_OUTD:
+GM7303_DISPLAY:			; OUTPUT ASCII CHARACTER TO LCD DISPLAY
+					; CHAR IN A
+	AND	07FH
+	OUT 	(GM7303_DATA),A	;  OUTPUT TO THE DATA PORT
+					;    AND STROBE IT IN
+DATA_STROBE:
+	LD	A,04H			;  SET R/W* LINE low (BIT 1=0)
+					;  SET RS line HIGH FOR DATA (BIT 2=1)
+					;  (A) = (X,X,X,X,X,RS,R/W*, E)
+	JP	STROBE		; DO THE STROBE  
+					; RETURN THROUGH THE STROBE ROUTINE
+	
+GM7303_COMMAND:			;  OUTPUT COMMAND TO 7303 MODULE LCD
+	OUT	(GM7303_DATA),A	; WRITE TO TO DISPLAY
+	JP	CMD_STROBE		; COMMAND STROBE (STROBE ROUTING LETS US RETURN)
+	
+; SEND DATA STRING
+; DE=STRING ADDRESS, NULL TERMINATED
+;
+GM7303_OUTDS:
+	LD	A,(DE)		; NEXT BYTE TO SEND
+;	LD	A,045H		; NEXT BYTE TO SEND
+	OR	A			; SET FLAGS
+	RET	Z			; DONE WHEN NULL REACHED
+	INC	DE			; BUMP POINTER
+	CALL	GM7303_DISPLAY	; SEND IT
+	JR	GM7303_OUTDS	; LOOP AS NEEDED
+;
+; GOTO ROW(H),COL(L)
+;
+GM7303_GOTORC:
+	PUSH	HL			; SAVE INCOMING
+	LD	A,H			; ROW # TO A
+	LD	HL,GM7303_ROWS	; POINT TO ROWS TABLE
+	CALL	ADDHLA		; INDEX TO ROW ENTRY
+	LD	A,(HL)		; GET ROW START
+	POP	HL			; RECOVER INCOMING
+	ADD	A,L			; ADD COLUMN
+	ADD	A,GM7303_FUNC_DDADR	; ADD SET DDRAM COMMAND
+	JR	GM7303_COMMAND	; AND SEND IT
+;
+
+; 		RESET	LCD CONTROLLER MANUAL RESET METHOD
+;
+GM7303_RESET:
+	LD	A,GM7303_FUNC_SET | %11000    ;   8 BIT INTERFACE, COMMAND MODE, 2 LINES
+	OUT	(GM7303_DATA),A
+	LD	A,01               ;  SET ENABLE LINE HIGH (BIT 0=1)
+	OUT 	(GM7303_CTRL),A
+	LD	DE,5000/16		; WAIT >40MS, WE USE 50MS
+	CALL	VDELAY		; DO IT
+	LD	A,00              ;  SET ENABLE LINE LOW (BIT 0=0)
+	OUT 	(GM7303_CTRL),A
+
+	LD	A,01               ;  SET ENABLE LINE HIGH (BIT 0=1)
+	OUT 	(GM7303_CTRL),A
+	LD	DE,500/16		; WAIT >4MS, WE USE 5MS
+	CALL	VDELAY		; DO IT
+	LD	A,00              ;  SET ENABLE LINE LOW (BIT 0=0)
+	OUT 	(GM7303_CTRL),A
+
+	LD	A,01               ;  SET ENABLE LINE HIGH (BIT 0=1)
+	OUT 	(GM7303_CTRL),A
+	LD	DE,500/16		; WAIT >4MS, WE USE 5MS
+	CALL	VDELAY		; DO IT
+	LD	A,00              ;  SET ENABLE LINE LOW (BIT 0=0)
+	OUT 	(GM7303_CTRL),A
+	RET
+
+;
+; DATA STORAGE
+;
+GM7303_PRESENT	.DB	0	; NON-ZERO WHEN HARDWARE DETECTED
+;
+GM7303_ROWS	.DB	$00,$40	; ROW START INDEX FOR 2 LINE DISPLAY
+;
+GM7303_INIT_TBL:	; TABLE OF INITIALISATION COMMANDS FOR THE LCD
+	.DB 38H	;   8 BIT OPERATION, 2 LINE DISPLAY, 8X5 FONT
+	.DB 0EH	;   TURN ON DISPLAY, CURSOR AND BLINK
+	.DB 06H	;   SET CURSOR MOVE FROM LEFT TO RIGHT
+	.DB 01H	;   CLEAR DISPLAY
+;
+GM7303_STR_BAN	.DB	"RomWBW ", BIOSVER, 0
+GM7303_STR_CFG	.DB	"Build:", CONFIG, 0
+GM7303_STR_IO	.DB	"Dsk", 0
+
+
+
diff --git a/Source/HBIOS/hbios.asm b/Source/HBIOS/hbios.asm
index 2fd51b5a..8e2b92f3 100644
--- a/Source/HBIOS/hbios.asm
+++ b/Source/HBIOS/hbios.asm
@@ -2310,6 +2310,9 @@ HB_CPU1:
 #IF (H8PENABLE)
 	CALL	H8P_PREINIT
 #ENDIF
+#IF (GM7303ENABLE)
+      CALL GM7303_PREINIT
+#ENDIF
 ;
 	FPLEDS(DIAG_05)
 ;
@@ -3730,6 +3733,9 @@ HB_INITTBL:
 #IF (H8PENABLE)
 	.DW	H8P_INIT
 #ENDIF
+#IF (GM7303ENABLE)
+	.DW	GM7303_INIT
+#ENDIF
 #IF (PLATFORM == PLT_NABU)
 	.DW	NABU_INIT
 #ENDIF
@@ -4347,6 +4353,11 @@ HB_DSKACT:
 	CALL	LCD_DSKACT
   #ENDIF
 #ENDIF
+#IF (GM7303ENABLE)
+  #IF (GM7303DSKACT)
+	CALL	GM7303_DSKACT
+  #ENDIF
+#ENDIF
 #IF (DSKYENABLE)
   #IF (DSKYDSKACT)
 ;
@@ -7964,7 +7975,6 @@ PS_VDGDC	.TEXT	"GDC$"
 PS_VDTMS	.TEXT	"TMS$"
 PS_VDVGA	.TEXT	"VGA$"
 PS_VDVRC	.TEXT	"VRC$"
-PS_VDEF		.TEXT	"EF$"
 PS_VDFV		.TEXT	"FV$"
 ;
 ; VIDEO TYPE STRINGS
@@ -8024,6 +8034,15 @@ SIZ_LCD	.EQU	$ - ORG_LCD
 		MEMECHO	" bytes.\n"
 #ENDIF
 ;
+#IF (GM7303ENABLE)
+ORG_GM7303	.EQU	$
+  #INCLUDE "gm7303.asm"
+SIZ_GM7303	.EQU	$ - ORG_GM7303
+		MEMECHO	"GM7303 occupies "
+		MEMECHO	SIZ_GM7303
+		MEMECHO	" bytes.\n"
+#ENDIF
+;
 #IF (H8PENABLE)
 ORG_H8P	.EQU	$
   #INCLUDE "h8p.asm"

From 8d91176230b6ce3988f5d6b2652203d8db279fa5 Mon Sep 17 00:00:00 2001
From: Wayne Warthen <wwarthen@gmail.com>
Date: Fri, 6 Sep 2024 17:54:02 -0700
Subject: [PATCH 3/5] Cosmetic Updates

---
 Source/HBIOS/Build.cmd      | 2 --
 Source/HBIOS/cfg_gmz180.asm | 8 ++++----
 Source/HBIOS/hbios.asm      | 5 +++--
 3 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/Source/HBIOS/Build.cmd b/Source/HBIOS/Build.cmd
index 134ffe24..35162fd4 100644
--- a/Source/HBIOS/Build.cmd
+++ b/Source/HBIOS/Build.cmd
@@ -244,7 +244,5 @@ call Build EPITX std || exit /b
 call Build NABU std || exit /b
 call Build FZ80 std || exit /b
 call Build UNA std || exit /b
-call Build GMZ180 std || exit /b
-
 
 goto :eof
diff --git a/Source/HBIOS/cfg_gmz180.asm b/Source/HBIOS/cfg_gmz180.asm
index e9524f0d..01077108 100644
--- a/Source/HBIOS/cfg_gmz180.asm
+++ b/Source/HBIOS/cfg_gmz180.asm
@@ -84,7 +84,7 @@ LEDMODE		.EQU	LEDMODE_STD	; LEDMODE_[STD|SC|RTC|NABU]
 LEDPORT		.EQU	$0E		; STATUS LED PORT ADDRESS
 LEDDISKIO	.EQU	TRUE		; ENABLES DISK I/O ACTIVITY ON STATUS LED
 ;
-DSKYENABLE	.EQU	FALSE  	; ENABLES DSKY FUNCTIONALITY
+DSKYENABLE	.EQU	FALSE		; ENABLES DSKY FUNCTIONALITY
 DSKYDSKACT	.EQU	FALSE		; ENABLES DISK ACTIVITY ON DSKY DISPLAY
 ICMENABLE	.EQU	FALSE		; ENABLES ORIGINAL DSKY ICM DRIVER (7218)
 ICMPPIBASE	.EQU	$60		; BASE I/O ADDRESS OF ICM PPI
@@ -95,9 +95,9 @@ H8PENABLE	.EQU	FALSE		; ENABLES HEATH H8 FRONT PANEL
 LCDENABLE	.EQU	FALSE		; ENABLE LCD DISPLAY
 LCDBASE		.EQU	$DA		; BASE I/O ADDRESS OF LCD CONTROLLER
 LCDDSKACT	.EQU	TRUE		; ENABLES DISK ACTIVITY ON LCD DISPLAY
-GM7303ENABLE	.EQU  TRUE        ; ENABLES THE PROLOG 7303 BOARD WITH 16X2 LCD
-GM7303BASE	.EQU  $30         ; BASE ADDRESS FOR GM3703 BOARD  
-GM7303DSKACT	.EQU  TRUE  ; ENABLE DISK ACTIVITY OF GM7303 LCD DISPLAY
+GM7303ENABLE	.EQU	TRUE		; ENABLES THE PROLOG 7303 BOARD WITH 16X2 LCD
+GM7303BASE	.EQU	$30		; BASE ADDRESS FOR GM3703 BOARD  
+GM7303DSKACT	.EQU	TRUE		; ENABLE DISK ACTIVITY OF GM7303 LCD DISPLAY
 ;
 BOOTCON		.EQU	0		; BOOT CONSOLE DEVICE
 SECCON		.EQU	$FF		; SECONDARY CONSOLE DEVICE
diff --git a/Source/HBIOS/hbios.asm b/Source/HBIOS/hbios.asm
index 8e2b92f3..75e292db 100644
--- a/Source/HBIOS/hbios.asm
+++ b/Source/HBIOS/hbios.asm
@@ -2311,7 +2311,7 @@ HB_CPU1:
 	CALL	H8P_PREINIT
 #ENDIF
 #IF (GM7303ENABLE)
-      CALL GM7303_PREINIT
+	CALL GM7303_PREINIT
 #ENDIF
 ;
 	FPLEDS(DIAG_05)
@@ -7975,6 +7975,7 @@ PS_VDGDC	.TEXT	"GDC$"
 PS_VDTMS	.TEXT	"TMS$"
 PS_VDVGA	.TEXT	"VGA$"
 PS_VDVRC	.TEXT	"VRC$"
+PS_VDEF		.TEXT	"EF$"
 PS_VDFV		.TEXT	"FV$"
 ;
 ; VIDEO TYPE STRINGS
@@ -8035,7 +8036,7 @@ SIZ_LCD	.EQU	$ - ORG_LCD
 #ENDIF
 ;
 #IF (GM7303ENABLE)
-ORG_GM7303	.EQU	$
+ORG_GM7303	.EQU$
   #INCLUDE "gm7303.asm"
 SIZ_GM7303	.EQU	$ - ORG_GM7303
 		MEMECHO	"GM7303 occupies "

From d20c72fe21ea5f9527d0f5b84fd1bf1e11488c98 Mon Sep 17 00:00:00 2001
From: Wayne Warthen <wwarthen@gmail.com>
Date: Fri, 6 Sep 2024 17:55:31 -0700
Subject: [PATCH 4/5] Bump Version Number

---
 Source/ver.inc | 2 +-
 Source/ver.lib | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/Source/ver.inc b/Source/ver.inc
index 51e79644..74471207 100644
--- a/Source/ver.inc
+++ b/Source/ver.inc
@@ -2,7 +2,7 @@
 #DEFINE	RMN	5
 #DEFINE	RUP	0
 #DEFINE	RTP	0
-#DEFINE BIOSVER	"3.5.0-dev.76"
+#DEFINE BIOSVER	"3.5.0-dev.77"
 #define rmj	RMJ
 #define rmn	RMN
 #define rup	RUP
diff --git a/Source/ver.lib b/Source/ver.lib
index ed3c00ff..b8bf07c7 100644
--- a/Source/ver.lib
+++ b/Source/ver.lib
@@ -3,5 +3,5 @@ rmn	equ	5
 rup	equ	0
 rtp	equ	0
 biosver	macro
-	db	"3.5.0-dev.76"
+	db	"3.5.0-dev.77"
 	endm

From e1beb01a5181939abb0da8253b095e24f596c214 Mon Sep 17 00:00:00 2001
From: Wayne Warthen <wwarthen@gmail.com>
Date: Fri, 6 Sep 2024 18:12:46 -0700
Subject: [PATCH 5/5] Update Configs to Handle GM3707 Enable

- The non-Genesis config files needed to be updated to disable the GM3707.
---
 Source/HBIOS/cfg_duo.asm      | 1 +
 Source/HBIOS/cfg_dyno.asm     | 1 +
 Source/HBIOS/cfg_epitx.asm    | 1 +
 Source/HBIOS/cfg_fz80.asm     | 1 +
 Source/HBIOS/cfg_heath.asm    | 1 +
 Source/HBIOS/cfg_master.asm   | 3 +++
 Source/HBIOS/cfg_mbc.asm      | 1 +
 Source/HBIOS/cfg_mk4.asm      | 1 +
 Source/HBIOS/cfg_mon.asm      | 1 +
 Source/HBIOS/cfg_n8.asm       | 1 +
 Source/HBIOS/cfg_nabu.asm     | 1 +
 Source/HBIOS/cfg_rcz180.asm   | 1 +
 Source/HBIOS/cfg_rcz280.asm   | 1 +
 Source/HBIOS/cfg_rcz80.asm    | 1 +
 Source/HBIOS/cfg_rph.asm      | 1 +
 Source/HBIOS/cfg_s100.asm     | 1 +
 Source/HBIOS/cfg_sbc.asm      | 1 +
 Source/HBIOS/cfg_scz180.asm   | 1 +
 Source/HBIOS/cfg_z80retro.asm | 1 +
 Source/HBIOS/cfg_zeta.asm     | 1 +
 Source/HBIOS/cfg_zeta2.asm    | 1 +
 Source/HBIOS/hbios.asm        | 2 +-
 22 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/Source/HBIOS/cfg_duo.asm b/Source/HBIOS/cfg_duo.asm
index 1fcc4177..3479b707 100644
--- a/Source/HBIOS/cfg_duo.asm
+++ b/Source/HBIOS/cfg_duo.asm
@@ -93,6 +93,7 @@ H8PENABLE	.EQU	FALSE		; ENABLES HEATH H8 FRONT PANEL
 LCDENABLE	.EQU	FALSE		; ENABLE LCD DISPLAY
 LCDBASE		.EQU	$DA		; BASE I/O ADDRESS OF LCD CONTROLLER
 LCDDSKACT	.EQU	TRUE		; ENABLES DISK ACTIVITY ON LCD DISPLAY
+GM7303ENABLE	.EQU	FALSE		; ENABLES THE PROLOG 7303 BOARD WITH 16X2 LCD
 ;
 BOOTCON		.EQU	0		; BOOT CONSOLE DEVICE
 SECCON		.EQU	$FF		; SECONDARY CONSOLE DEVICE
diff --git a/Source/HBIOS/cfg_dyno.asm b/Source/HBIOS/cfg_dyno.asm
index a044dd5a..eddb776e 100644
--- a/Source/HBIOS/cfg_dyno.asm
+++ b/Source/HBIOS/cfg_dyno.asm
@@ -95,6 +95,7 @@ H8PENABLE	.EQU	FALSE		; ENABLES HEATH H8 FRONT PANEL
 LCDENABLE	.EQU	FALSE		; ENABLE LCD DISPLAY
 LCDBASE		.EQU	$DA		; BASE I/O ADDRESS OF LCD CONTROLLER
 LCDDSKACT	.EQU	TRUE		; ENABLES DISK ACTIVITY ON LCD DISPLAY
+GM7303ENABLE	.EQU	FALSE		; ENABLES THE PROLOG 7303 BOARD WITH 16X2 LCD
 ;
 BOOTCON		.EQU	0		; BOOT CONSOLE DEVICE
 SECCON		.EQU	$FF		; SECONDARY CONSOLE DEVICE
diff --git a/Source/HBIOS/cfg_epitx.asm b/Source/HBIOS/cfg_epitx.asm
index 29cb322f..d184d8c8 100644
--- a/Source/HBIOS/cfg_epitx.asm
+++ b/Source/HBIOS/cfg_epitx.asm
@@ -96,6 +96,7 @@ H8PENABLE	.EQU	FALSE		; ENABLES HEATH H8 FRONT PANEL
 LCDENABLE	.EQU	FALSE		; ENABLE LCD DISPLAY
 LCDBASE		.EQU	$DA		; BASE I/O ADDRESS OF LCD CONTROLLER
 LCDDSKACT	.EQU	TRUE		; ENABLES DISK ACTIVITY ON LCD DISPLAY
+GM7303ENABLE	.EQU	FALSE		; ENABLES THE PROLOG 7303 BOARD WITH 16X2 LCD
 ;
 BOOTCON		.EQU	0		; BOOT CONSOLE DEVICE
 SECCON		.EQU	$FF		; SECONDARY CONSOLE DEVICE
diff --git a/Source/HBIOS/cfg_fz80.asm b/Source/HBIOS/cfg_fz80.asm
index ac8f1b59..1d170f34 100644
--- a/Source/HBIOS/cfg_fz80.asm
+++ b/Source/HBIOS/cfg_fz80.asm
@@ -95,6 +95,7 @@ H8PENABLE	.EQU	FALSE		; ENABLES HEATH H8 FRONT PANEL
 LCDENABLE	.EQU	FALSE		; ENABLE LCD DISPLAY
 LCDBASE		.EQU	$DA		; BASE I/O ADDRESS OF LCD CONTROLLER
 LCDDSKACT	.EQU	TRUE		; ENABLES DISK ACTIVITY ON LCD DISPLAY
+GM7303ENABLE	.EQU	FALSE		; ENABLES THE PROLOG 7303 BOARD WITH 16X2 LCD
 ;
 BOOTCON		.EQU	0		; BOOT CONSOLE DEVICE
 SECCON		.EQU	$FF		; SECONDARY CONSOLE DEVICE
diff --git a/Source/HBIOS/cfg_heath.asm b/Source/HBIOS/cfg_heath.asm
index e0a02a20..7b74cafe 100644
--- a/Source/HBIOS/cfg_heath.asm
+++ b/Source/HBIOS/cfg_heath.asm
@@ -95,6 +95,7 @@ H8PENABLE	.EQU	TRUE		; ENABLES HEATH H8 FRONT PANEL
 LCDENABLE	.EQU	FALSE		; ENABLE LCD DISPLAY
 LCDBASE		.EQU	$DA		; BASE I/O ADDRESS OF LCD CONTROLLER
 LCDDSKACT	.EQU	TRUE		; ENABLES DISK ACTIVITY ON LCD DISPLAY
+GM7303ENABLE	.EQU	FALSE		; ENABLES THE PROLOG 7303 BOARD WITH 16X2 LCD
 ;
 BOOTCON		.EQU	0		; BOOT CONSOLE DEVICE
 SECCON		.EQU	$FF		; SECONDARY CONSOLE DEVICE
diff --git a/Source/HBIOS/cfg_master.asm b/Source/HBIOS/cfg_master.asm
index a1a27b1e..aa3d5960 100644
--- a/Source/HBIOS/cfg_master.asm
+++ b/Source/HBIOS/cfg_master.asm
@@ -124,6 +124,9 @@ H8PENABLE	.EQU	FALSE		; ENABLES HEATH H8 FRONT PANEL
 LCDENABLE	.EQU	FALSE		; ENABLE LCD DISPLAY
 LCDBASE		.EQU	$DA		; BASE I/O ADDRESS OF LCD CONTROLLER
 LCDDSKACT	.EQU	TRUE		; ENABLES DISK ACTIVITY ON LCD DISPLAY
+GM7303ENABLE	.EQU	FALSE		; ENABLES THE PROLOG 7303 BOARD WITH 16X2 LCD
+GM7303BASE	.EQU	$30		; BASE ADDRESS FOR GM3703 BOARD  
+GM7303DSKACT	.EQU	TRUE		; ENABLE DISK ACTIVITY OF GM7303 LCD DISPLAY
 ;
 BOOTCON		.EQU	0		; BOOT CONSOLE DEVICE
 SECCON		.EQU	$FF		; SECONDARY CONSOLE DEVICE
diff --git a/Source/HBIOS/cfg_mbc.asm b/Source/HBIOS/cfg_mbc.asm
index 42979884..448c0b14 100644
--- a/Source/HBIOS/cfg_mbc.asm
+++ b/Source/HBIOS/cfg_mbc.asm
@@ -90,6 +90,7 @@ H8PENABLE	.EQU	FALSE		; ENABLES HEATH H8 FRONT PANEL
 LCDENABLE	.EQU	FALSE		; ENABLE LCD DISPLAY
 LCDBASE		.EQU	$DA		; BASE I/O ADDRESS OF LCD CONTROLLER
 LCDDSKACT	.EQU	TRUE		; ENABLES DISK ACTIVITY ON LCD DISPLAY
+GM7303ENABLE	.EQU	FALSE		; ENABLES THE PROLOG 7303 BOARD WITH 16X2 LCD
 ;
 BOOTCON		.EQU	0		; BOOT CONSOLE DEVICE
 SECCON		.EQU	$FF		; SECONDARY CONSOLE DEVICE
diff --git a/Source/HBIOS/cfg_mk4.asm b/Source/HBIOS/cfg_mk4.asm
index cdbc26c3..ab9a47bd 100644
--- a/Source/HBIOS/cfg_mk4.asm
+++ b/Source/HBIOS/cfg_mk4.asm
@@ -95,6 +95,7 @@ H8PENABLE	.EQU	FALSE		; ENABLES HEATH H8 FRONT PANEL
 LCDENABLE	.EQU	FALSE		; ENABLE LCD DISPLAY
 LCDBASE		.EQU	$DA		; BASE I/O ADDRESS OF LCD CONTROLLER
 LCDDSKACT	.EQU	TRUE		; ENABLES DISK ACTIVITY ON LCD DISPLAY
+GM7303ENABLE	.EQU	FALSE		; ENABLES THE PROLOG 7303 BOARD WITH 16X2 LCD
 ;
 BOOTCON		.EQU	0		; BOOT CONSOLE DEVICE
 SECCON		.EQU	$FF		; SECONDARY CONSOLE DEVICE
diff --git a/Source/HBIOS/cfg_mon.asm b/Source/HBIOS/cfg_mon.asm
index 1195d421..08eae842 100644
--- a/Source/HBIOS/cfg_mon.asm
+++ b/Source/HBIOS/cfg_mon.asm
@@ -90,6 +90,7 @@ H8PENABLE	.EQU	FALSE		; ENABLES HEATH H8 FRONT PANEL
 LCDENABLE	.EQU	FALSE		; ENABLE LCD DISPLAY
 LCDBASE		.EQU	$DA		; BASE I/O ADDRESS OF LCD CONTROLLER
 LCDDSKACT	.EQU	TRUE		; ENABLES DISK ACTIVITY ON LCD DISPLAY
+GM7303ENABLE	.EQU	FALSE		; ENABLES THE PROLOG 7303 BOARD WITH 16X2 LCD
 ;
 BOOTCON		.EQU	0		; BOOT CONSOLE DEVICE
 SECCON		.EQU	$FF		; SECONDARY CONSOLE DEVICE
diff --git a/Source/HBIOS/cfg_n8.asm b/Source/HBIOS/cfg_n8.asm
index 013c9f42..10689dba 100644
--- a/Source/HBIOS/cfg_n8.asm
+++ b/Source/HBIOS/cfg_n8.asm
@@ -97,6 +97,7 @@ H8PENABLE	.EQU	FALSE		; ENABLES HEATH H8 FRONT PANEL
 LCDENABLE	.EQU	FALSE		; ENABLE LCD DISPLAY
 LCDBASE		.EQU	$DA		; BASE I/O ADDRESS OF LCD CONTROLLER
 LCDDSKACT	.EQU	TRUE		; ENABLES DISK ACTIVITY ON LCD DISPLAY
+GM7303ENABLE	.EQU	FALSE		; ENABLES THE PROLOG 7303 BOARD WITH 16X2 LCD
 ;
 BOOTCON		.EQU	0		; BOOT CONSOLE DEVICE
 SECCON		.EQU	$FF		; SECONDARY CONSOLE DEVICE
diff --git a/Source/HBIOS/cfg_nabu.asm b/Source/HBIOS/cfg_nabu.asm
index ffd17d82..6274884d 100644
--- a/Source/HBIOS/cfg_nabu.asm
+++ b/Source/HBIOS/cfg_nabu.asm
@@ -95,6 +95,7 @@ H8PENABLE	.EQU	FALSE		; ENABLES HEATH H8 FRONT PANEL
 LCDENABLE	.EQU	FALSE		; ENABLE LCD DISPLAY
 LCDBASE		.EQU	$DA		; BASE I/O ADDRESS OF LCD CONTROLLER
 LCDDSKACT	.EQU	TRUE		; ENABLES DISK ACTIVITY ON LCD DISPLAY
+GM7303ENABLE	.EQU	FALSE		; ENABLES THE PROLOG 7303 BOARD WITH 16X2 LCD
 ;
 BOOTCON		.EQU	0		; BOOT CONSOLE DEVICE
 SECCON		.EQU	$FF		; SECONDARY CONSOLE DEVICE
diff --git a/Source/HBIOS/cfg_rcz180.asm b/Source/HBIOS/cfg_rcz180.asm
index ff4d325a..4810d61c 100644
--- a/Source/HBIOS/cfg_rcz180.asm
+++ b/Source/HBIOS/cfg_rcz180.asm
@@ -101,6 +101,7 @@ H8PENABLE	.EQU	FALSE		; ENABLES HEATH H8 FRONT PANEL
 LCDENABLE	.EQU	TRUE		; ENABLE LCD DISPLAY
 LCDBASE		.EQU	$AA		; BASE I/O ADDRESS OF LCD CONTROLLER
 LCDDSKACT	.EQU	TRUE		; ENABLES DISK ACTIVITY ON LCD DISPLAY
+GM7303ENABLE	.EQU	FALSE		; ENABLES THE PROLOG 7303 BOARD WITH 16X2 LCD
 ;
 BOOTCON		.EQU	0		; BOOT CONSOLE DEVICE
 SECCON		.EQU	$FF		; SECONDARY CONSOLE DEVICE
diff --git a/Source/HBIOS/cfg_rcz280.asm b/Source/HBIOS/cfg_rcz280.asm
index 88167ddc..e7f3ff06 100644
--- a/Source/HBIOS/cfg_rcz280.asm
+++ b/Source/HBIOS/cfg_rcz280.asm
@@ -95,6 +95,7 @@ H8PENABLE	.EQU	FALSE		; ENABLES HEATH H8 FRONT PANEL
 LCDENABLE	.EQU	TRUE		; ENABLE LCD DISPLAY
 LCDBASE		.EQU	$DA		; BASE I/O ADDRESS OF LCD CONTROLLER
 LCDDSKACT	.EQU	TRUE		; ENABLES DISK ACTIVITY ON LCD DISPLAY
+GM7303ENABLE	.EQU	FALSE		; ENABLES THE PROLOG 7303 BOARD WITH 16X2 LCD
 ;
 BOOTCON		.EQU	0		; BOOT CONSOLE DEVICE
 SECCON		.EQU	$FF		; SECONDARY CONSOLE DEVICE
diff --git a/Source/HBIOS/cfg_rcz80.asm b/Source/HBIOS/cfg_rcz80.asm
index a54383a7..cf373f57 100644
--- a/Source/HBIOS/cfg_rcz80.asm
+++ b/Source/HBIOS/cfg_rcz80.asm
@@ -95,6 +95,7 @@ H8PENABLE	.EQU	FALSE		; ENABLES HEATH H8 FRONT PANEL
 LCDENABLE	.EQU	TRUE		; ENABLE LCD DISPLAY
 LCDBASE		.EQU	$DA		; BASE I/O ADDRESS OF LCD CONTROLLER
 LCDDSKACT	.EQU	TRUE		; ENABLES DISK ACTIVITY ON LCD DISPLAY
+GM7303ENABLE	.EQU	FALSE		; ENABLES THE PROLOG 7303 BOARD WITH 16X2 LCD
 ;
 BOOTCON		.EQU	0		; BOOT CONSOLE DEVICE
 SECCON		.EQU	$FF		; SECONDARY CONSOLE DEVICE
diff --git a/Source/HBIOS/cfg_rph.asm b/Source/HBIOS/cfg_rph.asm
index 904481d7..9ac15716 100644
--- a/Source/HBIOS/cfg_rph.asm
+++ b/Source/HBIOS/cfg_rph.asm
@@ -95,6 +95,7 @@ H8PENABLE	.EQU	FALSE		; ENABLES HEATH H8 FRONT PANEL
 LCDENABLE	.EQU	FALSE		; ENABLE LCD DISPLAY
 LCDBASE		.EQU	$DA		; BASE I/O ADDRESS OF LCD CONTROLLER
 LCDDSKACT	.EQU	TRUE		; ENABLES DISK ACTIVITY ON LCD DISPLAY
+GM7303ENABLE	.EQU	FALSE		; ENABLES THE PROLOG 7303 BOARD WITH 16X2 LCD
 ;
 BOOTCON		.EQU	0		; BOOT CONSOLE DEVICE
 SECCON		.EQU	$FF		; SECONDARY CONSOLE DEVICE
diff --git a/Source/HBIOS/cfg_s100.asm b/Source/HBIOS/cfg_s100.asm
index 17948d0a..046a3faa 100644
--- a/Source/HBIOS/cfg_s100.asm
+++ b/Source/HBIOS/cfg_s100.asm
@@ -95,6 +95,7 @@ H8PENABLE	.EQU	FALSE		; ENABLES HEATH H8 FRONT PANEL
 LCDENABLE	.EQU	FALSE		; ENABLE LCD DISPLAY
 LCDBASE		.EQU	$DA		; BASE I/O ADDRESS OF LCD CONTROLLER
 LCDDSKACT	.EQU	TRUE		; ENABLES DISK ACTIVITY ON LCD DISPLAY
+GM7303ENABLE	.EQU	FALSE		; ENABLES THE PROLOG 7303 BOARD WITH 16X2 LCD
 ;
 BOOTCON		.EQU	0		; BOOT CONSOLE DEVICE
 SECCON		.EQU	$FF		; SECONDARY CONSOLE DEVICE
diff --git a/Source/HBIOS/cfg_sbc.asm b/Source/HBIOS/cfg_sbc.asm
index 2a3dae88..63b532b9 100644
--- a/Source/HBIOS/cfg_sbc.asm
+++ b/Source/HBIOS/cfg_sbc.asm
@@ -90,6 +90,7 @@ H8PENABLE	.EQU	FALSE		; ENABLES HEATH H8 FRONT PANEL
 LCDENABLE	.EQU	FALSE		; ENABLE LCD DISPLAY
 LCDBASE		.EQU	$DA		; BASE I/O ADDRESS OF LCD CONTROLLER
 LCDDSKACT	.EQU	TRUE		; ENABLES DISK ACTIVITY ON LCD DISPLAY
+GM7303ENABLE	.EQU	FALSE		; ENABLES THE PROLOG 7303 BOARD WITH 16X2 LCD
 ;
 BOOTCON		.EQU	0		; BOOT CONSOLE DEVICE
 SECCON		.EQU	$FF		; SECONDARY CONSOLE DEVICE
diff --git a/Source/HBIOS/cfg_scz180.asm b/Source/HBIOS/cfg_scz180.asm
index d901cae0..0b536b9e 100644
--- a/Source/HBIOS/cfg_scz180.asm
+++ b/Source/HBIOS/cfg_scz180.asm
@@ -95,6 +95,7 @@ H8PENABLE	.EQU	FALSE		; ENABLES HEATH H8 FRONT PANEL
 LCDENABLE	.EQU	TRUE		; ENABLE LCD DISPLAY
 LCDBASE		.EQU	$AA		; BASE I/O ADDRESS OF LCD CONTROLLER
 LCDDSKACT	.EQU	TRUE		; ENABLES DISK ACTIVITY ON LCD DISPLAY
+GM7303ENABLE	.EQU	FALSE		; ENABLES THE PROLOG 7303 BOARD WITH 16X2 LCD
 ;
 BOOTCON		.EQU	0		; BOOT CONSOLE DEVICE
 SECCON		.EQU	$FF		; SECONDARY CONSOLE DEVICE
diff --git a/Source/HBIOS/cfg_z80retro.asm b/Source/HBIOS/cfg_z80retro.asm
index fa527c99..3679abeb 100644
--- a/Source/HBIOS/cfg_z80retro.asm
+++ b/Source/HBIOS/cfg_z80retro.asm
@@ -93,6 +93,7 @@ H8PENABLE	.EQU	FALSE		; ENABLES HEATH H8 FRONT PANEL
 LCDENABLE	.EQU	FALSE		; ENABLE LCD DISPLAY
 LCDBASE		.EQU	$DA		; BASE I/O ADDRESS OF LCD CONTROLLER
 LCDDSKACT	.EQU	TRUE		; ENABLES DISK ACTIVITY ON LCD DISPLAY
+GM7303ENABLE	.EQU	FALSE		; ENABLES THE PROLOG 7303 BOARD WITH 16X2 LCD
 ;
 BOOTCON		.EQU	0		; BOOT CONSOLE DEVICE
 SECCON		.EQU	$FF		; SECONDARY CONSOLE DEVICE
diff --git a/Source/HBIOS/cfg_zeta.asm b/Source/HBIOS/cfg_zeta.asm
index 9efd553b..0e8757fb 100644
--- a/Source/HBIOS/cfg_zeta.asm
+++ b/Source/HBIOS/cfg_zeta.asm
@@ -82,6 +82,7 @@ H8PENABLE	.EQU	FALSE		; ENABLES HEATH H8 FRONT PANEL
 LCDENABLE	.EQU	FALSE		; ENABLE LCD DISPLAY
 LCDBASE		.EQU	$DA		; BASE I/O ADDRESS OF LCD CONTROLLER
 LCDDSKACT	.EQU	TRUE		; ENABLES DISK ACTIVITY ON LCD DISPLAY
+GM7303ENABLE	.EQU	FALSE		; ENABLES THE PROLOG 7303 BOARD WITH 16X2 LCD
 ;
 BOOTCON		.EQU	0		; BOOT CONSOLE DEVICE
 SECCON		.EQU	$FF		; SECONDARY CONSOLE DEVICE
diff --git a/Source/HBIOS/cfg_zeta2.asm b/Source/HBIOS/cfg_zeta2.asm
index 700f64f1..cc03d9cc 100644
--- a/Source/HBIOS/cfg_zeta2.asm
+++ b/Source/HBIOS/cfg_zeta2.asm
@@ -93,6 +93,7 @@ H8PENABLE	.EQU	FALSE		; ENABLES HEATH H8 FRONT PANEL
 LCDENABLE	.EQU	FALSE		; ENABLE LCD DISPLAY
 LCDBASE		.EQU	$DA		; BASE I/O ADDRESS OF LCD CONTROLLER
 LCDDSKACT	.EQU	TRUE		; ENABLES DISK ACTIVITY ON LCD DISPLAY
+GM7303ENABLE	.EQU	FALSE		; ENABLES THE PROLOG 7303 BOARD WITH 16X2 LCD
 ;
 BOOTCON		.EQU	0		; BOOT CONSOLE DEVICE
 SECCON		.EQU	$FF		; SECONDARY CONSOLE DEVICE
diff --git a/Source/HBIOS/hbios.asm b/Source/HBIOS/hbios.asm
index 75e292db..d25748bc 100644
--- a/Source/HBIOS/hbios.asm
+++ b/Source/HBIOS/hbios.asm
@@ -8036,7 +8036,7 @@ SIZ_LCD	.EQU	$ - ORG_LCD
 #ENDIF
 ;
 #IF (GM7303ENABLE)
-ORG_GM7303	.EQU$
+ORG_GM7303	.EQU	$
   #INCLUDE "gm7303.asm"
 SIZ_GM7303	.EQU	$ - ORG_GM7303
 		MEMECHO	"GM7303 occupies "