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 "