From 3a020341cb983498fd43a6df0d7820de910be3d1 Mon Sep 17 00:00:00 2001
From: b1ackmai1er <39449559+b1ackmai1er@users.noreply.github.com>
Date: Sat, 23 May 2020 23:56:04 +0800
Subject: [PATCH] Update cbios.asm

---
 Source/CBIOS/cbios.asm | 68 ++++++++----------------------------------
 1 file changed, 13 insertions(+), 55 deletions(-)

diff --git a/Source/CBIOS/cbios.asm b/Source/CBIOS/cbios.asm
index 6d2c1a9b..162f7645 100644
--- a/Source/CBIOS/cbios.asm
+++ b/Source/CBIOS/cbios.asm
@@ -300,7 +300,8 @@ DPBCNT	.EQU	($ - DPBMAP) / 2
 ;__________________________________________________________________________________________________
 BOOT:
 	; STANDARD BOOT INVOCATION
-	LD	SP,STACK	; STACK FOR INITIALIZATION
+	;LD	SP,STACK	; STACK FOR INITIALIZATION
+	LD	SP,CCP_LOC	; PUT STACK JUST BELOW CCP
 ;
 	; COPY INITIALIZATION CODE TO RUNNING LOCATION $8000
 	LD	HL,BUFPOOL
@@ -328,17 +329,17 @@ BOOT:
 ;
 ;__________________________________________________________________________________________________
 REBOOT:
-	; REBOOT FROM ROM, REPLACES BOOT AFTER INIT
+	; RESTART, REPLACES BOOT AFTER INIT
 #IFDEF PLTUNA
+	; FOR UNA, COLD BOOT
 	DI				; NO INTERRUPTS
 	LD	BC,$01FB		; UNA FUNC = SET BANK
 	LD	DE,0			; ROM BOOT BANK
 	CALL	$FFFD			; DO IT (RST 08 NOT SAFE HERE)
 #ENDIF
+;
 #IFDEF PLTWBW
-	;DI				; NO INTERRUPTS
-	;LD	A,0			; ROM BOOT BANK
-	;CALL	HB_BNKSEL		; SELECT IT INTO LOW MEMORY
+	; WARM START
 	LD	B,BF_SYSRESET		; SYSTEM RESTART
 	LD	C,BF_SYSRES_WARM	; WARM START
 	CALL	$FFF0			; CALL HBIOS
@@ -401,23 +402,13 @@ RESCPM:
 	LD	HL,WBOOTE		; GET WARM BOOT ENTRY ADDRESS
 	LD	($0001),HL		; AND PUT IT AT $0001
 
-;	; INT / RST 38 -> INVOKE MONITOR
-;	LD	($0038),A
-;	LD	HL,GOMON
-;	LD	($0039),HL
-
-;	; INT / RST 38 -> PANIC
-;	LD	($0038),A
-;	LD	HL,PANIC		; PANIC ROUTINE ADDRESS
-;	LD	($0039),HL		; POKE IT
-
 	; CALL 5 -> INVOKE BDOS
 	LD	($0005),A		; JP OPCODE AT $0005
 	LD	HL,BDOS_LOC + 6		; GET BDOS ENTRY ADDRESS
 	LD	($0006),HL		; PUT IT AT $0006
 ;
 	; INSTALL ROMWBW CBIOS PAGE ZERO STAMP AT $40
-	LD	HL,STPIMG		; FORM STAMP DATA IMAGE
+	LD	HL,STPIMG		; FROM STAMP DATA IMAGE
 	LD	DE,STPLOC		; TO IT'S LOCATION IN PAGE ZERO
 	LD	BC,STPSIZ		; SIZE OF BLOCK TO COPY
 	LDIR				; DO IT
@@ -448,26 +439,6 @@ GOCCP:
 	LD	C,A			; SETUP C WITH CURRENT USER/DISK, ASSUME IT IS OK
 	JP	CCP_LOC			; JUMP TO COMMAND PROCESSOR
 ;
-;__________________________________________________________________________________________________
-GOMON:
-	CALL	PANIC
-;
-;	DI
-;	IM	1
-;
-;	LD	SP,STACK
-;
-;	; RELOAD MONITOR INTO RAM (IN CASE IT HAS BEEN OVERWRITTEN)
-;	CALL	ROMPGZ
-;	LD	HL,MON_IMG
-;	LD	DE,MON_LOC
-;	LD	BC,MON_SIZ
-;	LDIR
-;	CALL	RAMPGZ
-
-;	; JUMP TO MONITOR WARM ENTRY
-;	JP	MON_UART
-;
 ;
 ;==================================================================================================
 ;   CHARACTER BIOS FUNCTIONS
@@ -1360,27 +1331,14 @@ DSK_MBR:
 DSK_MBR0:
 ;
 #IFDEF PLTWBW
-	; SWITCH TO BIOS BANK TO ACCESS DISK BUFFER
+	; ACTIVATE BIOS BANK TO ACCESS DISK BUFFER
 	LD	(STKSAV),SP	; SAVE CUR STACK
-	LD	SP,XSTACK	; NEW STACK IN HI MEM
-	LD	A,(HB_CURBNK)	; GET CUR BANK
-	PUSH	AF		; SAVE CUR BANK
-	LD	A,(BNKBIOS)	; BIOS BANK
-	CALL	HB_BNKSEL	; DO IT
-	CALL	DSK_MBR1	; DO THE WORK
-	; RESTORE BANK
-	PUSH	AF		; SAVE RESULT
-	POP	HL		; TO HL
-	EX	(SP),HL		; RESULT TO TOS, PREV BANK TO H
-	LD	A,H		; PREV BANK TO A
-	CALL	HB_BNKSEL	; SELECT IT
-	POP	AF		; ORIGINAL RESULT BACK
+	LD	SP,STACK	; NEW STACK IN HI MEM
+	LD	A,(BNKBIOS)	; ACTIVATE HBIOS BANK
+	LD	HL,DSK_MBR1	; ROUTINE TO RUN
+	CALL	HB_BNKCALL	; DO IT
 	LD	SP,(STKSAV)	; RESTORE ORIGINAL STACK
 	RET
-	
-	.FILL	32,0
-XSTACK	.EQU	$
-
 #ENDIF
 ;
 DSK_MBR1:
@@ -3239,7 +3197,7 @@ CMD	.DB	CMDLEN - 2
 CMDLEN	.EQU	$ - CMD
 ;
 FCB_SUB	.DB	'?'			; DRIVE CODE, 0 = CURRENT DRIVE
-	.DB	"SUBMIT	 "		; FILE NAME, 8 CHARS
+	.DB	"SUBMIT  "		; FILE NAME, 8 CHARS
 	.DB	"COM"			; FILE TYPE, 3 CHARS
 	.FILL	36-($-FCB_SUB),0	; ZERO FILL REMAINDER OF FCB
 ;