Switch IDENT from $FFFE to $FFFC

Accommodates upcoming MSX platform port.  See [Discussion #613](https://github.com/wwarthen/RomWBW/discussions/613).

Source/Apps/FDU/fdu.asm

@@ -172,7 +172,7 @@ INIT0:
 
 INIT1:
 	; ROMWBW HBIOS DETECTION
-	LD	HL,(0FFFEH)	; HL := ADR OR ROMWBW HBIOS IDENT
+	LD	HL,(0FFFCH)	; HL := ADR OR ROMWBW HBIOS IDENT
 	LD	A,(HL)		; GET FIRST BYTE OF ROMWBW MARKER
 	CP	'W'		; MATCH?
 	JP	NZ,INIT2	; ABORT WITH INVALID CONFIG BLOCK

Source/Apps/HTalk/htalk.asm

@@ -31,7 +31,7 @@ STKSIZ	.EQU	$FF
 ;
 ; HBIOS SYSTEM CALLS AND ID STRING ADDRESS
 ; 
-ROMWBW_ID	.EQU		$FFFE	; ROMWBW ID STRING ADDRESS
+ROMWBW_ID	.EQU		$FFFC	; ROMWBW ID STRING ADDRESS
 HBIOS_SYS	.EQU		$FFF0 	; HBIOS SYSCALL ADDRESS
 
 H_SYSGET	.EQU		$F8		;	GET SYSTEM INFO

Source/Apps/Test/I2C/srom.asm

@@ -37,7 +37,7 @@ fcb2		.equ	$006C	; second CP/M parsed FCB
 cr		.equ	13	; carriage return
 lf		.equ	10	; line feed
 ;	                        
-ident		.equ	$FFFE	; loc of RomWBW HBIOS ident ptr
+ident		.equ	$FFFC	; loc of RomWBW HBIOS ident ptr
 ;
 bf_sysver	.equ	$F1	; BIOS: VER function
 bf_sysget	.equ	$F8	; HBIOS: SYSGET function

Source/Apps/Tune/hbios.inc

@@ -1,4 +1,4 @@
-IDENT		.EQU	$FFFE		; loc of RomWBW HBIOS ident ptr
+IDENT		.EQU	$FFFC		; loc of RomWBW HBIOS ident ptr
 ;
 BF_SYSVER	.EQU	$F1		; BIOS: VER function
 BF_SYSGET	.EQU	$F8		; HBIOS: SYSGET function

Source/Apps/Tune/tune.asm

@@ -446,7 +446,7 @@ IDBIO:
 ;
 IDBIO1:
 	; Check for RomWBW (HBIOS)
-	LD	HL,($FFFE)	; HL := HBIOS ident location
+	LD	HL,($FFFC)	; HL := HBIOS ident location
 	LD	A,'W'		; First byte of ident
 	CP	(HL)		; Compare
 	JR	NZ,IDBIO2	; Not HBIOS

Source/Apps/XM/xmhb.z80

@@ -239,7 +239,7 @@ IDBIO:
 ;
 IDBIO1:
 	; Check for RomWBW (HBIOS)
-	LD	HL,(0FFFEH)	; HL := HBIOS ident location
+	LD	HL,(0FFFCH)	; HL := HBIOS ident location
 	LD	A,'W'		; First byte of ident
 	CP	(HL)		; Compare
 	JR	NZ,IDBIO2	; Not HBIOS

Source/Apps/XM/xmhb_old.z80

@@ -180,7 +180,7 @@ IDBIO:
 ;
 IDBIO1:
 	; Check for RomWBW (HBIOS)
-	LD	HL,(0FFFEH)	; HL := HBIOS ident location
+	LD	HL,(0FFFCH)	; HL := HBIOS ident location
 	LD	A,'W'		; First byte of ident
 	CP	(HL)		; Compare
 	JR	NZ,IDBIO2	; Not HBIOS

Source/Apps/XM/xmuf.z80

@@ -175,7 +175,7 @@ IDBIO:
 ;
 IDBIO1:
 	; Check for RomWBW (HBIOS)
-	LD	HL,(0FFFEH)	; HL := HBIOS ident location
+	LD	HL,(0FFFCH)	; HL := HBIOS ident location
 	LD	A,'W'		; First byte of ident
 	CP	(HL)		; Compare
 	JR	NZ,IDBIO2	; Not HBIOS

Source/Apps/ZMD/zmdhb.z80

@@ -273,7 +273,7 @@ IDBIO:
 ;
 IDBIO1:
 	; Check for RomWBW (HBIOS)
-	LD	HL,(0FFFEH)	; HL := HBIOS ident location
+	LD	HL,(0FFFCH)	; HL := HBIOS ident location
 	LD	A,'W'		; First byte of ident
 	CP	(HL)		; Compare
 	JR	NZ,IDBIO2	; Not HBIOS

Source/Apps/assign/assign.asm

@@ -190,7 +190,7 @@ init:
 	ldir			; do the copy
 ;
 	; determine end of CBIOS (assume HBIOS for now)
-	ld	hl,($FFFE)	; get proxy start address
+	ld	hl,($FFFC)	; get proxy start address
 	ld	(bioend),hl	; save as CBIOS end address
 ;
 	; check for UNA (UBIOS)

Source/Apps/cpuspd/cpuspd.asm

@@ -29,7 +29,7 @@ bf_sysres_int	.equ	$00		; reset hbios internal
 bf_sysres_warm	.equ	$01		; warm start (restart boot loader)
 bf_sysres_cold	.equ	$02		; cold start
 ;
-ident		.equ	$FFFE		; loc of RomWBW HBIOS ident ptr
+ident		.equ	$FFFC		; loc of RomWBW HBIOS ident ptr
 ;
 ;=======================================================================
 ;

Source/Apps/mode/mode.asm

@@ -48,7 +48,7 @@ stksiz	.equ	$40		; Working stack size
 restart	.equ	$0000		; CP/M restart vector
 bdos	.equ	$0005		; BDOS invocation vector
 ;
-ident	.equ	$FFFE		; loc of RomWBW HBIOS ident ptr
+ident	.equ	$FFFC		; loc of RomWBW HBIOS ident ptr
 ;
 bf_cioinit	.equ	$04	; HBIOS: CIOINIT function
 bf_cioquery	.equ	$05	; HBIOS: CIOQUERY function

Source/Apps/reboot/reboot.asm

@@ -53,7 +53,7 @@ bf_sysres_int	.equ	$00		; reset hbios internal
 bf_sysres_warm	.equ	$01		; warm start (restart boot loader)
 bf_sysres_cold	.equ	$02		; cold start
 ;
-ident		.equ	$FFFE		; loc of RomWBW HBIOS ident ptr
+ident		.equ	$FFFC		; loc of RomWBW HBIOS ident ptr
 ;
 ;===============================================================================
 ;

Source/Apps/rtc/rtc.asm

@@ -1203,7 +1203,7 @@ IDBIO:
 ;
 IDBIO1:
 	; Check for RomWBW (HBIOS)
-	LD	HL,(0FFFEH)	; HL := HBIOS ident location
+	LD	HL,(0FFFCH)	; HL := HBIOS ident location
 	LD	A,'W'		; First byte of ident
 	CP	(HL)		; Compare
 	JR	NZ,IDBIO2	; Not HBIOS

Source/Apps/slabel/slabel.asm

@@ -68,7 +68,7 @@ bf_sysreset	.equ	$F0		; restart system
 bf_sysres_int	.equ	$00		; reset hbios internal
 bf_sysres_warm	.equ	$01		; warm start (restart boot loader)
 ;
-ident		.equ	$FFFE		; loc of RomWBW HBIOS ident ptr
+ident		.equ	$FFFC		; loc of RomWBW HBIOS ident ptr
 ;
 sigbyte1	.equ	$A5		; 1st sig byte boot info sector (bb_sig)
 sigbyte2	.equ	$5A		; 2nd sig byte boot info sector (bb_sig)

Source/Apps/startup/startup.asm

@@ -31,7 +31,7 @@ stksiz	.equ	$40		; Working stack size
 restart	.equ	$0000		; CP/M restart vector
 bdos	.equ	$0005		; BDOS invocation vector
 ;
-ident	.equ	$FFFE		; loc of RomWBW HBIOS ident ptr
+ident	.equ	$FFFC		; loc of RomWBW HBIOS ident ptr
 ;
 rmj	.equ	2		; intended CBIOS version - major
 rmn	.equ	9		; intended CBIOS version - minor

Source/Apps/timer/timer.asm

@@ -52,7 +52,7 @@ STKSIZ		.EQU	$40		; Working stack size
 RESTART		.EQU	$0000		; CP/M restart vector
 BDOS		.EQU	$0005		; BDOS invocation vector
 ;
-IDENT		.EQU	$FFFE		; loc of RomWBW HBIOS ident ptr
+IDENT		.EQU	$FFFC		; loc of RomWBW HBIOS ident ptr
 ;
 BF_SYSVER	.EQU	$F1		; BIOS: VER function
 BF_SYSGET	.EQU	$F8		; HBIOS: SYSGET function
@@ -322,7 +322,7 @@ IDBIO:
 ;
 IDBIO1:
 	; Check for RomWBW (HBIOS)
-	LD	HL,($FFFE)		; HL := HBIOS ident location
+	LD	HL,(IDENT)		; HL := HBIOS ident location
 	LD	A,'W'			; First byte of ident
 	CP	(HL)			; Compare
 	JR	NZ,IDBIO2		; Not HBIOS

Source/HBIOS/hbios.asm

@@ -1376,8 +1376,8 @@ HBX_BUF_END	.EQU	$
 	JP	HBX_BNKSEL		; (+19) HB_BNKSEL: FIXED ADR ENTRY FOR HBX_BNKSEL
 	JP	HBX_BNKCPY		; (+22) HB_BNKCPY: FIXED ADR ENTRY FOR HBX_BNKCPY
 	JP	HBX_BNKCALL		; (+25) HB_BNKCALL: FIXED ADR ENTRY FOR HBX_BNKCALL
-	.DW	HBX_IDENT		; (+28) ADDRESS OF HBIOS PROXY START (DEPRECATED)
-	.DW	HBX_IDENT		; (+30) HB_IDENT: ADDRESS OF HBIOS IDENT INFO DATA BLOCK
+	.DW	HBX_IDENT		; (+28) HB_IDENT: ADDRESS OF HBIOS IDENT INFO DATA BLOCK
+	.DW	HBX_IDENT		; (+30) RESERVED (USED BY MSX PLATFORM), SET TO HBX_IDENT FOR BACKWARD COMPATIBILITY
 ;
 	.FILL	MEMTOP - $		; FILL TO END OF MEMORY (AS NEEDED)
 	.ORG	HBX_IMG + HBX_SIZ	; RESTORE ORG

Source/HBIOS/hbios.inc

@@ -554,5 +554,4 @@ HB_INVOKE	.EQU	HBX_XFCFNS + (0 * 3)	; INVOKE HBIOS FUNCTION
 HB_BNKSEL	.EQU	HBX_XFCFNS + (1 * 3)	; SELECT LOW MEMORY BANK ID
 HB_BNKCPY	.EQU	HBX_XFCFNS + (2 * 3)	; INTERBANK MEMORY COPY
 HB_BNKCALL	.EQU	HBX_XFCFNS + (3 * 3)	; INTERBANK FUNCTION CALL
-;HB_LOC		.EQU	HBX_XFCFNS + 12		; ADDRESS OF HBIOS PROXY START (DEPRECATED)
-HB_IDENT	.EQU	HBX_XFCFNS + 14		; POINTER TO HBIOS IDENT DATA BLOCK
+HB_IDENT	.EQU	HBX_XFCFNS + 12		; POINTER TO HBIOS IDENT DATA BLOCK

Source/HBIOS/sysconf.asm

@@ -51,7 +51,7 @@ cmdmax		.EQU	$20		; Max cmd input length
 stksiz		.EQU	$40		; Working stack size
 restart		.EQU	$0000		; CP/M restart vector
 bdos		.EQU	$0005		; BDOS invocation vector
-ident		.EQU	$FFFE		; loc of RomWBW HBIOS ident ptr
+ident		.EQU	$FFFC		; loc of RomWBW HBIOS ident ptr
 ;
 ETX		.EQU	3		; CTRL-C
 BEL		.EQU	7		; ASCII bell

Source/ver.inc

@@ -2,7 +2,7 @@
 #DEFINE	RMN	6
 #DEFINE	RUP	0
 #DEFINE	RTP	0
-#DEFINE BIOSVER	"3.6.0-dev.26"
+#DEFINE BIOSVER	"3.6.0-dev.27"
 #define rmj	RMJ
 #define rmn	RMN
 #define rup	RUP

Source/ver.lib

@@ -3,5 +3,5 @@ rmn	equ	6
 rup	equ	0
 rtp	equ	0
 biosver	macro
-	db	"3.6.0-dev.26"
+	db	"3.6.0-dev.27"
 	endm