BPBIOS Sync

Doc/ChangeLog.txt

@@ -54,6 +54,7 @@ Version 3.1.1
 - WBW: Add interrupt receive support to UART driver
 - PMS: Add XModem transfer within Debug Monitor
 - PMS & AJL: Add DMAMON test application
+- LWN: Substantial BPBIOS cleanup
 
 Version 3.1
 -----------

Source/BPBIOS/bpbio-ww.z80

@@ -157,7 +157,8 @@ BIOSJT:	JP	CBOOT		; 00 Cold Boot
 	  ELSE
 	JP	ISTRUE		; 26..return 0FFH (No Clock) if No code
 	  ENDIF		;clock
-	JP	SELMEM		; 27 Select Alternate Memory Bank
+	;JP	SELMEM		; 27 Select Alternate Memory Bank
+	JP	HB_SELMEM	; 27 Select Alternate Memory Bank
 	JP	SETBNK		; 28 Select DMA Memory bank
 	JP	XMOVE		; 29 Set Source/Destination Banks for Move
 
@@ -224,6 +225,10 @@ JBSTRN:	JP	BSTRN		; BIOS Sectran
 				; << Insert the Cold boot routines >>
 	INCLUDE	CBOOT-WW.Z80	; <<     in file CBOOT-xx.Z80      >>
 
+				; << ****** Hardware Specific ****** >>
+				; <<   HBIOS interface routines in   >>
+	INCLUDE	HBIOS.Z80	; <<          HBIOS.Z80              >>
+
 ; Deblocking Buffer Allocation
 
 	  IF  [BANKED OR INROM]
@@ -338,6 +343,21 @@ FRPUTW:	LD	(HL),E
 	RET
 
 	  ENDIF		;(not) banked
+
+	  IF HB_DEBUG
+				; << ****** Hardware Specific ****** >>
+				; <<  HBIOS Diagnostic Support       >>
+	INCLUDE	UTIL.Z80	; <<     Routines                    >>
+	
+	  ELSE			; If Not Debug, Use these hooks
+	
+	CSEG
+	  
+PANIC:	DI
+	HALT
+
+	  ENDIF ; HB_DEBUG
+
 	PAGE
 ;* * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 ;	Core   BIOS   Code
@@ -358,8 +378,6 @@ RETBIO:	LD	BC,BIOSJT	; Get address of bios base
 ;	Return  DPH  Table  Address
 ;::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
 
-	INCLUDE UTIL.Z80
-
 DRVTBL:	LD	HL,DPHTBL	; Point to DPH table
 	RET
 
@@ -398,9 +416,6 @@ DRVTBL:	LD	HL,DPHTBL	; Point to DPH table
 				; <<   Enter Warm Boot routines in   >>
 	INCLUDE	WBOOT-WW.Z80	; <<          WBOOT-xx.Z80           >>
 
-				; << ****** Hardware Specific ****** >>
-				; <<   HBIOS interface routines in   >>
-	INCLUDE	HBIOS.Z80	; <<          HBIOS.Z80              >>
 ;.....
 ; Status bytes of general use placed at end of Data area
 

Source/BPBIOS/cboot-ww.z80

@@ -13,6 +13,44 @@
 ; 1.0 - 13 Aug 96 - Initial Release for P112.				HFB
 ;::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
 
+	  IF HB_DEBUG
+
+	CSEG
+XORG	DEFL	$
+	ORG	0
+ORG_CSEG	EQU	$
+	ORG	XORG
+
+	DSEG
+XORG	DEFL	$
+	ORG	0
+ORG_DSEG	EQU	$
+	ORG	XORG
+
+	    IF BANKED
+
+	COMMON	/BANK2/
+XORG	DEFL	$
+	ORG	0
+ORG_BANK2	EQU	$
+	ORG	XORG
+
+	COMMON	/B2RAM/
+XORG	DEFL	$
+	ORG	0
+ORG_B2RAM	EQU	$
+	ORG	XORG
+
+	COMMON	/RESVD/
+XORG	DEFL	$
+	ORG	0
+ORG_RESVD	EQU	$
+	ORG	XORG
+
+	    ENDIF ; BANKED
+
+	  ENDIF ; HB_DEBUG
+	
 	DSEG
 ;.....
 ; Cold boot entry.  This code is executed only once and so may be
@@ -35,11 +73,23 @@ CBOOT:
 	LD	SP,80H		; Set stack in Low memory
 	  ENDIF		; BANKED
 
-	CALL	HBX_INIT
+	CALL	HB_INIT
 
 	LD	HL,(IOBYT)	; Get IOBYTE, Default Drive & User
 	LD	(3),HL		;   Set values in TPA bank
 
+	  IF  BANKED
+	; Copy vectors from TPA page zero to SYS page zero
+	; This is done very early to ensure interrupt mode 1
+	; vector is available.
+	LD	BC,(TPABNK)	; C := TPABNK, B := SYSBNK
+	CALL	XMOVE		; Set source/dest banks for copy
+	LD	HL,0		; Source address is zero
+	LD	DE,0		; Destination address is zero
+	LD	BC,40H		; Copy 40H bytes
+	CALL	MOVE		; Do it
+	  ENDIF		; BANKED
+
 	  IF  BANKED
 	CALL	GOSYSB		; Turn on the System bank
 	XOR	A
@@ -61,16 +111,19 @@ CBOOT:
 	; Grab a copy of command processor from TPA and
 	; cache it in (SYSBNK):100H.  We assume that the
 	; original copy of command processor is in high memory.
+	;
+	; It is critical that we use the HB variants of MOVE and XMOVE
+	; because we are moving between banks even in a non-banked
+	; system!
 	LD	A,(TPABNK)	; Source bank is TPABNK
 	LD	C,A		; Put it in C
 	LD	A,(SYSBNK)	; Destination bank is SYSBNK
 	LD	B,A		; Put it in B
-	CALL	HBX_XCOPY	; Set banks for extended copy
+	CALL	HB_XMOVE	; Set banks for extended copy
 	LD	HL,(CPADR)	; Copy from start of command processor
 	LD	DE,100H		; .. to $100 in system bank
 	LD	BC,(CPLEN)	; Length of command processor
-	CALL	HBX_COPY	; Do it
-	
+	CALL	HB_MOVE		; Do it
 
 	JP	WBOOTV		;   move it and commence execution
 	  ELSE
@@ -378,7 +431,7 @@ MEMOK:
 	  ENDIF		;BIOERM
 	DEFB	CR,LF+80H
 
-;WW	EI		; Turn Interrupts back on
+	EI		; Turn Interrupts back on
 	RET		; ..and return
 ;.....
 ; Offset to and get ENV Address and respective element size

Source/BPBIOS/deblock.z80

@@ -268,8 +268,9 @@ MATCH:	LD	A,(SECMSK)	; Get the sector mask
 ;
 ; Modified to use HBIOS host buffer
 ;
-	;LD	A,BID_HB	; HSTBUF is in HBIOS
-	LD	A,(HBX_BNKBIOS)	; HSTBUF is in HBIOS
+	; HSTBUF is always in HBIOS bank where I/O is done
+	LD	A,(TPABNK)	; TPA BANK
+	DEC	A		; HBIOS bank is one below
 	LD	C,A
 	  IF  BANKED
 	LD	A,(DMABNK)	; Set Read Destination Bank
@@ -283,8 +284,7 @@ MATCH:	LD	A,(SECMSK)	; Get the sector mask
 	LD	A,B		; Else reverse banks
 	LD	B,C
 	LD	C,A
-OKBNKS:	CALL	HBX_XCOPY	; Set source & destination banks
-;	LD	DE,HBBUF	; Host buffer address in HBIOS bank
+OKBNKS:	CALL	HB_XMOVE	; Set source & destination banks
 	LD	DE,(HB_DSKBUF)	; Host buffer address in HBIOS bank
 	ADD	HL,DE		; Point to the sector
 	LD	DE,(DMAADR)	; User's buffer
@@ -301,17 +301,19 @@ OKBNKS:	CALL	HBX_XCOPY	; Set source & destination banks
 
 ; Move the data
 
-RWMOVE:	CALL	HBX_COPY	; Handle possible inter-bank move
+RWMOVE:	
+	CALL	HB_MOVE		; Handle possible inter-bank move
 
 	  ELSE	; HBIOS
-	  IF  BANKED
-	    IF  INROM
+
+	    IF  BANKED
+	      IF  INROM
 	LD	A,(TPABNK)	; If bank in ROM, HSTBUF is in TPA
 	LD	C,A
-	    ELSE
+	      ELSE
 	LD	A,(SYSBNK)	; If bank in RAM, HSTBUF is in System Bank
 	LD	C,A
-	    ENDIF	;INROM
+	      ENDIF	;INROM
 	LD	A,(DMABNK)	; Set Read Destination Bank
 	LD	B,A
 	LD	A,(READOP)	; Direction?
@@ -321,7 +323,7 @@ RWMOVE:	CALL	HBX_COPY	; Handle possible inter-bank move
 	LD	B,C
 	LD	C,A
 OKBNKS:	CALL	XMOVE		; Set source & destination banks
-	  ENDIF		;BANKED
+	    ENDIF		;BANKED
 	LD	DE,HSTBUF	; Host buffer address
 	ADD	HL,DE		; Point to the sector
 	LD	DE,(DMAADR)	; User's buffer

Source/BPBIOS/hard-ww.z80

@@ -139,24 +139,10 @@ HDREAD:
 	  ENDIF
 ;
 ;==================================================================================================
-;   HDSK DISK DRIVER
+;   HBIOS Disk Driver Interface
 ;==================================================================================================
-;;
-;; HBIOS HDSK equates
-;;
-;HDSK_IO		EQU	0FDH
-;;
-;HDSK_CMDNONE	EQU	0
-;HDSK_CMDRESET	EQU	1
-;HDSK_CMDREAD	EQU	2
-;HDSK_CMDWRITE	EQU	3
-;HDSK_CMDPARAM	EQU	4
-;;
-;; STATUS
-;;
-;HDSKRC_OK	EQU	0
-;;
-;HBIOS disk commands
+;
+; HBIOS disk commands
 ;
 HB_DSKRD	EQU	13H
 HB_DSKWR	EQU	14H
@@ -198,7 +184,7 @@ HDSK_RW1:
 	RET	NZ              ; ABORT IF SEEK RETURNED AN ERROR W/ ERROR IN A
 	LD	HL,(HB_DSKBUF)  ; GET BUFFER ADDRESS
 	;LD	D,BID_HB	; BUFFER IN HBIOS BANK
-	LD	A,(HBX_BNKBIOS)	; BUFFER IN HBIOS BANK
+	LD	A,(HB_BNKBIOS)	; BUFFER IN HBIOS BANK
 	LD	D,A		; PUT IN D
 	LD	E,1		; ONE SECTOR
 	CALL	HBX_INVOKE	; DO IT

Source/BPBIOS/hbios.z80

@@ -7,6 +7,8 @@
 ; HBIOS Functions
 ;
 HBF_ALLOC	EQU	0F6H		; HBIOS Func: ALLOCATE Heap Memory
+HBF_PEEK	EQU	0FAH		; HBIOS Func: Peek Byte
+HBF_POKE	EQU	0FBH		; HBIOS Func: Poke Byte
 HBF_BNKINFO	EQU	0F8F2H		; HBIOS Func: Get Bank Info
 ;
 ; HBIOS Proxy Addresses
@@ -16,101 +18,189 @@ HBX_BNKSEL	EQU	0FFF3H
 HBX_BNKCPY	EQU	0FFF6H
 HBX_BNKCALL	EQU	0FFF9H
 
-HB_CURBNK	EQU	0FFE0H
-HB_INVBNK	EQU	0FFE1H
-HB_SRCADR	EQU	0FFE2H
-HB_SRCBNK	EQU	0FFE4H
-HB_DSTADR	EQU	0FFE5H
-HB_DSTBNK	EQU	0FFE7H
-HB_CPYLEN	EQU	0FFE8H
+HBX_CURBNK	EQU	0FFE0H
+HBX_INVBNK	EQU	0FFE1H
+HBX_SRCADR	EQU	0FFE2H
+HBX_SRCBNK	EQU	0FFE4H
+HBX_DSTADR	EQU	0FFE5H
+HBX_DSTBNK	EQU	0FFE7H
+HBX_CPYLEN	EQU	0FFE8H
 
 	CSEG
 
+
+;::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+;	Trap initial SELMEM call and fixup HBIOS bank ids.
+;  A = Bank
+;::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+
+; LDSYS calls the SELMEM entry point of BIOSJT in order to
+; place memory contents in SYSBNK.  It does this prior to
+; calling CBOOT to start the system.  Since we need to adjust
+; the bank numbers on-the-fly at startup to adjust for
+; HBIOS actual RAM size, we intercept the initial HB_SELMEM
+; call here, make required changes, then update the
+; BIOSJT to point directly to the normal SELMEM routine for
+; all subsequent calls.
+
+	; BPBIOS	HBIOS		Typical
+	; ------------	--------------	--------------
+	;  -1: <COMMON>	BID_COM		90h - 1 = 8Fh
+	;  -2: TPABNK	BID_USR         90h - 2 = 8Eh
+	;  -3: <HBIOS>	BID_BIOS	90h - 3 = 8Dh	
+	;  -4: SYSBNK	BID_AUX		90h - 4 = 8Ch
+	;  -9: BNKM	BID_AUX-5	90h - 9 = 87h
+	; -16: RAMBNK	RAMD0		90h - 16 = 80h
+	
+HB_SELMEM:
+	PUSH	AF
+	PUSH	BC
+	PUSH	DE
+	PUSH	HL
+	
+	LD	BC,HBF_BNKINFO	; HBIOS BNKINFO function
+	CALL	HBX_INVOKE	; DO IT, D=BID_BIOS, E=BID_USER
+	LD	A,D		; BID_BIOS
+	LD	(HB_BNKBIOS),A	; SET HB_BNKBIOS
+	ADD	A,3		; HBIOS + 3
+	LD	(HB_BNKEND),A	; ... is the ending RAM bank
+	  IF BANKED
+	LD	(BNKADJ+1),A	; Dynamically update SELBNK
+	  ENDIF
+	  
+	LD	HL,SELMEM	; Future SELMEM calls will
+	LD	(BIOSJT+(27*3)+1),HL	; ... go to real SELMEM
+	
+	POP	HL
+	POP	DE
+	POP	BC
+	POP	AF
+	JP	SELMEM
+	
+;::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+; Move Data - Possibly between banks.  This resembles CP/M 3, but
+;  usage of the HL and DE registers is reversed.
+; Enter: HL = Source Address
+;	 DE = Destination Address
+;	 BC = Number of bytes to move
+; Exit : None
+; Uses : AF,BC,DE,HL
+;::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+
+HB_MOVE:
+	PUSH	HL
+	LD	HL,HB_BNKEND
+	LD	A,(HB_SRCBNK)
+	ADD	A,(HL)		; Adjust for HBIOS bank ids
+	LD	(HBX_SRCBNK),A
+	LD	A,(HB_DSTBNK)
+	ADD	A,(HL)		; Adjust for HBIOS bank ids
+	LD	(HBX_DSTBNK),A
+	POP	HL
+	CALL	HBX_BNKCPY
+	PUSH	HL
+	LD	HL,(TPABNK)	; Get TPA Bank #
+	LD	H,L		; .to both H and L
+	LD	(HB_SRCBNK),HL	; ..set Source & Destination Bank # to TPA
+	POP	HL
+	RET
+
+;::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+;	Set Banks for Inter-Bank Xfer.  Save all Registers.
+;  B = Destination Bank, C = Source Bank
+;::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
+
+HB_XMOVE:
+	LD	(HB_SRCBNK),BC
+	RET
+
 ;
 ;==================================================================================================
 ;   HBIOS INITIALIZATION
 ;==================================================================================================
 ;
-; This code should be moved to follow CBOOT so that it will be reused
-; by RAM data.
-;
-HBX_INIT:
-
-	; Setup RST 08 vector
-	LD	A,0C3H			; $C3 = JP
-	LD	(08H),A
-	LD	HL,HBX_INVOKE
-	LD	(09H),HL
-
-	;; Init HB data fields
-	;LD	A,BID_USR
-	;LD	(HB_CURBNK),A
-	;LD	(HB_SRCBNK),A
-	;LD	(HB_DSTBNK),A
-
-	; Initialize BPBIOS bank numbers from HBIOS
-	; BNKU (UABNK)  --> 0 (DISABLED)
-	; BNK0 (TPABNK) --> BID_USR
-	; BNK1          --> BID_COM
-	; BNK2 (SYSBNK) --> BID_AUX (BID_BIOS - 1)
-	; BNK3 (RAMBNK) --> BID_RAMD0 (0x80)
-	; BNKM (MAXBNK) --> BID_RAMDN (BID_BIOS - 5)
-	LD	BC,HBF_BNKINFO	; HBIOS BNKINFO function
-	CALL	HBX_INVOKE	; DO IT, D=BID_BIOS, E=BID_USER
-	LD	A,E		; BID_USR
-	LD	(TPABNK),A	; SET BNK0 (TPABNK)
-	LD	A,D		; BID_BIOS
-	LD	(HBX_BNKBIOS),A	; SET HBX_BNKBIOS
-	DEC	A		; BID_AUX
-	LD	(SYSBNK),A	; SET BNK2 (SYSBNK)
-	SUB	4		; BID_RAMDN
-	LD	(MAXBNK),A	; SET BNKM (MAXBNK)
-	LD	A,80H		; FIRST PHYSICAL RAM BANK IS ALWAYS 0x80
-	LD	(RAMBNK),A	; SET BNK3 (RAMBNK)
+HB_INIT:
+	;; Setup RST 08 vector
+	;LD	A,0C3H			; $C3 = JP
+	;LD	(08H),A
+	;LD	HL,HBX_INVOKE
+	;LD	(09H),HL
+	
+	;IF  BANKED
+	;
+	;; Copy vectors from TPA page zero to SYS page zero
+	;LD	BC,(TPABNK)	; C := TPABNK, B := SYSBNK
+	;CALL	XMOVE		; Set source/dest banks for copy
+	;LD	HL,0		; Source address is zero
+	;LD	DE,0		; Destination address is zero
+	;LD	BC,40H		; Copy 40H bytes
+	;CALL	MOVE		; Do it
+	;
+	;ENDIF		;BANKED
+
+	  IF HB_DEBUG
+
+	CSEG
+XORG	DEFL	$
+	ORG	0
+ORG_CSEG	EQU	$
+	ORG	XORG
+
+	DSEG
+XORG	DEFL	$
+	ORG	0
+ORG_DSEG	EQU	$
+	ORG	XORG
 
-	IF  BANKED
+	    IF BANKED
 
-	; Copy vectors from TPA page zero to SYS page zero
-	LD	BC,(TPABNK)	; C := TPABNK, B := SYSBNK
-	CALL	XMOVE		; Set source/dest banks for copy
-	LD	HL,0		; Source address is zero
-	LD	DE,0		; Destination address is zero
-	LD	BC,40H		; Copy 40H bytes
-	CALL	MOVE		; Do it
-	LD	A,(TPABNK)	; Set all Bank regs to TPA
+	COMMON	/BANK2/
+XORG	DEFL	$
+	ORG	0
+ORG_BANK2	EQU	$
+	ORG	XORG
 
-	ENDIF		;BANKED
+	COMMON	/B2RAM/
+XORG	DEFL	$
+	ORG	0
+ORG_B2RAM	EQU	$
+	ORG	XORG
 
-; begin debug
+	COMMON	/RESVD/
+XORG	DEFL	$
+	ORG	0
+ORG_RESVD	EQU	$
+	ORG	XORG
+
+	    ENDIF
 	
 	CALL 	NEWLINE2
 	LD	DE,HB_STR_TAG
 	CALL	WRITESTR
 
-	CALL	NEWLINE
 	LD	DE,HB_STR_CSEG
 	CALL	WRITESTR
-	LD	BC,BIOSJT
+	LD	BC,ORG_CSEG
 	CALL	PRTHEXWORD
 	LD	DE,HB_STR_DSEG
 	CALL	WRITESTR
-	LD	BC,CBOOT
+	LD	BC,ORG_DSEG
 	CALL	PRTHEXWORD
 	
-	IF BANKED
+	    IF BANKED
 	LD	DE,HB_STR_BANK2
 	CALL	WRITESTR
-	LD	BC,ROMJT
+	LD	BC,ORG_BANK2
 	CALL	PRTHEXWORD
 	LD	DE,HB_STR_B2RAM
 	CALL	WRITESTR
-	LD	BC,CBOOT0
+	LD	BC,ORG_B2RAM
 	CALL	PRTHEXWORD
 	LD	DE,HB_STR_RESVD
 	CALL	WRITESTR
-	LD	BC,ALV$50
+	LD	BC,ORG_RESVD
 	CALL	PRTHEXWORD
-	ENDIF		;BANKED
+	    ENDIF		;BANKED
 	
 	CALL	NEWLINE
 	
@@ -123,129 +213,17 @@ HB_STR_BANK2:	DB	", BANK2=$"
 HB_STR_B2RAM:	DB	", B2RAM=$"
 HB_STR_RESVD:	DB	", RESVD=$"
 
-; end debug
-
-	CSEG
-
-HBX_BNKBIOS	DEFB	0	; Bank id of HBIOS bank
-
-;
-;==================================================================================================
-;   HBIOS INTERFACE
-;==================================================================================================
-;
-; TODO: Move the following into ibmv-ww.z80 which is where it belongs.
-;
-HBX_XCOPY:
-	LD	A,C
-	LD	(HB_SRCBNK),A
-	LD	A,B
-	LD	(HB_DSTBNK),A
-	RET
-
-HBX_COPY:
-	JP	HBX_BNKCPY
-	
-;==================================================================================================
-;	LD	A,(C:HL)
-;==================================================================================================
-
-HBX_FRGETB:
-	LD	(HBX_STKSAV),SP	; Save current stack
-	LD	SP,HBX_TMPSTK	; Activate our private stack
-	LD	A,(HB_CURBNK)	; Get current bank
-	LD	(HBX_BNKSAV),A	; Save current bank
-	PUSH	BC
-	LD	A,C
-	HB_DI
-	CALL	HBX_BNKSEL
-	LD	C,(HL)
-	LD	A,(HBX_BNKSAV)
-	CALL	HBX_BNKSEL
-	HB_EI
-	LD	A,C
-	POP	BC
-	LD	SP,(HBX_STKSAV)	; RESTORE ORIGINAL STACK FRAME
-	RET
-
-;==================================================================================================
-;	LD	DE,(C:HL)
-;==================================================================================================
-
-HBX_FRGETW:
-	LD	(HBX_STKSAV),SP	; Save current stack
-	LD	SP,HBX_TMPSTK	; Activate our private stack
-	LD	A,(HB_CURBNK)	; Get current bank
-	LD	(HBX_BNKSAV),A	; Save current bank
-	LD	A,C
-	HB_DI
-	CALL	HBX_BNKSEL
-	LD	E,(HL)
-	INC	HL
-	LD	D,(HL)
-	DEC	HL
-	LD	A,(HBX_BNKSAV)
-	CALL	HBX_BNKSEL
-	HB_EI
-	LD	SP,(HBX_STKSAV)	; RESTORE ORIGINAL STACK FRAME
-	RET
-
-;==================================================================================================
-;	LD	(C:HL),A
-;==================================================================================================
+	  ELSE	; [HB_DEBUG]
 	  
-HBX_FRPUTB:	
-	LD	(HBX_STKSAV),SP	; Save current stack
-	LD	SP,HBX_TMPSTK	; Activate our private stack
-	PUSH	AF
-	LD	A,(HB_CURBNK)	; Get current bank
-	LD	(HBX_BNKSAV),A	; Save current bank
-	POP	AF
-	PUSH	BC
-	LD	B,A
-	LD	A,C
-	HB_DI
-	CALL	HBX_BNKSEL
-	LD	(HL),B
-	LD	A,(HBX_BNKSAV)
-	CALL	HBX_BNKSEL
-	HB_EI
-	POP	BC
-	LD	SP,(HBX_STKSAV)	; RESTORE ORIGINAL STACK FRAME
 	RET
 
-;==================================================================================================
-;	LD	(C:HL),DE
-;==================================================================================================
+	  ENDIF ; [HB_DEBUG]
 
-HBX_FRPUTW:	
-	LD	(HBX_STKSAV),SP	; Save current stack
-	LD	SP,HBX_TMPSTK	; Activate our private stack
-	LD	A,(HB_CURBNK)	; Get current bank
-	LD	(HBX_BNKSAV),A	; Save current bank
-	LD	A,C
-	HB_DI
-	CALL	HBX_BNKSEL
-	LD	(HL),E
-	INC	HL
-	LD	(HL),D
-	DEC	HL
-	LD	A,(HBX_BNKSAV)
-	CALL	HBX_BNKSEL
-	HB_EI
-	LD	SP,(HBX_STKSAV)	; RESTORE ORIGINAL STACK FRAME
-	RET
-
-;==================================================================================================
-; PRIVATE DATA
-;==================================================================================================
-
-	DSEG
-
-HB_DSKBUF:	DEFW	0	; Address of physical disk buffer in HBIOS bank
-HBX_BNKSAV:	DEFB	0	; Saved bank id during HBIOS calls
-HBX_STKSAV:	DEFW	0	; Saved stack pointer during HBIOS calls
-		DEFS	32	; Private stack for HBIOS
-HBX_TMPSTK	EQU	$	; Top of private stack
+	CSEG
 
-
+HB_SRCBNK:	DEFS	1	; Move Source Bank #
+HB_DSTBNK:	DEFS	1	; Move Destination Bank #
+HB_BNKBIOS:	DEFS	1	; Bank id of HBIOS bank
+HB_BNKEND:	DEFS	1	; End of available RAM banks (last bank + 1)
+HB_DSKBUF:	DEFS	2	; Address of physical disk buffer in HBIOS bank
+

Source/BPBIOS/ibmv-ww.z80

@@ -16,8 +16,7 @@
 ; Uses : AF,BC,DE,HL
 ;::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
 
-MOVE:
-	JP	HBX_COPY
+MOVE	EQU	HB_MOVE		; Defer to HBIOS (see HBIOS.Z80)
 
 ;::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
 ;  Routine to Switch to Local Stack for Banked Operations
@@ -34,7 +33,8 @@ BIOSTK:	DEFB	0		; NOP if not currently in bank,
 	LD	(USP),SP	; Save User's Stack Pointer
 	LD	SP,USP-1	; ..and point locally, saving 1 byte for Bank
 	PUSH	AF		; Save entry A and Flags
-	LD	A,(HB_CURBNK)	; Get current bank
+	;LD	A,(HB_CURBNK)	; Get current bank
+	LD	A,(CURBNK)	; Get current bank
 	LD	(USP-1),A	; ..and save for exitting
 	LD	A,0C9H		; Disable other calls here
 	LD	(BIOSTK),A	; ..by poking a RETurn at entry
@@ -50,7 +50,7 @@ BIOSTK:	DEFB	0		; NOP if not currently in bank,
 
 USRSTK:	PUSH	AF
 	LD	A,(USP-1)	; Get bank control byte from entry
-	CALL	HBX_BNKSEL
+	CALL	SELBNK
 	XOR	A
 	LD	(BIOSTK),A	; Patch NOP back in at start of code
 	POP	AF
@@ -63,7 +63,7 @@ USRSTK:	PUSH	AF
 
 FRCLR:	PUSH	AF		; Save any entry in AF
 	LD	A,(USP-1)	; Get bank control byte
-	CALL	HBX_BNKSEL
+	CALL	SELBNK
 	XOR	A
 	LD	(BIOSTK),A	; Patch NOP to enable stack switcher
 	POP	AF
@@ -88,9 +88,10 @@ ABORT:	LD	SP,USP		; Insure stack is in Common Memory
 ; Uses : AF
 ;::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
 
-RETMEM:	LD	A,(HB_CURBNK)
+RETMEM:	LD	A,(CURBNK)
 	RET
 
+
 ;::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
 ;	Set Bank into context.  Save all Registers.
 ;  A = Bank
@@ -106,7 +107,9 @@ SELMEM:	LD	(USRBNK),A	; Update user bank
 ;::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
 
 SELBNK:	PUSH	AF		; Save regs
-SELBN0:	CALL	HBX_BNKSEL
+SELBN0:	LD	(CURBNK),A	; Save as current bank #
+BNKADJ:	ADD	A,90H		; Adjust for HBIOS bank ids
+	CALL	HBX_BNKSEL
 	POP	AF		; restore regs
 	RET
 
@@ -123,8 +126,7 @@ SETBNK:	LD	(DMABNK),A
 ;  B = Destination Bank, C = Source Bank
 ;::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
 
-XMOVE:
-	JP	HBX_XCOPY
+XMOVE:	EQU	HB_XMOVE	; Defer to HBIOS (see HBIOS.Z80)
 
 ;::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
 ;	Select  System  Bank
@@ -157,37 +159,75 @@ FRJP:	CALL	BIOSTK		; Insure we are in a common stack
 ;::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
 
 FRGETB:
-	JP	HBX_FRGETB
+	PUSH	BC		; Save BC
+	PUSH	DE		; Save DE
+	LD	B,0FAH		; HBIOS Peek function
+	LD	D,C		; Bank in D
+	CALL	HBX_INVOKE	; Do it
+	LD	A,E		; Value to A
+	POP	DE		; Restore DE
+	POP	BC		; Restore BC
+	RET
 
 ;::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
 ;	Load  DE,(HL)  from  Alternate  Bank
 ;::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
 
 FRGETW:
-	JP	HBX_FRGETW
+	PUSH	AF		; Save AF
+	CALL	FRGETB		; Get LSB
+	LD	E,A		; ... into E
+	INC	HL		; Next address
+	CALL	FRGETB		; Get MSB
+	LD	D,A		; ... into D
+	DEC	HL		; Restore HL
+	POP	AF		; Restore AF
+	RET
 
 ;::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
 ;	Load  (HL),A  to  Alternate  Bank  (in Reg C)
 ;::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
 
 FRPUTB:
-	JP	HBX_FRPUTB
+	PUSH	AF		; Save AF
+	PUSH	BC		; Save BC
+	PUSH	DE		; Save DE
+	LD	B,0FBH		; HBIOS Poke function
+	LD	D,C		; Bank in D
+	LD	E,A		; Value in E
+	CALL	HBX_INVOKE	; Do it
+	POP	DE		; Restore DE
+	POP	BC		; Restore BC
+	POP	AF		; Restore AF
+	RET
 
 ;::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
 ;	Load  (HL),DE  to  Alternate  Bank
 ;::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
 
 FRPUTW:
-	JP	HBX_FRPUTW
+	PUSH	AF		; Save AF
+	LD	A,E		; LSB to A
+	CALL	FRPUTB		; Put LSB
+	LD	A,D		; MSB to A
+	INC	HL		; Next address
+	CALL	FRPUTB		; Put MSB
+	DEC	HL		; Restore HL
+	POP	AF		; Restore AF
+	RET
 
 ;::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
 	DSEG
 
 JPBNK:	DEFS	1		; Bank # for Far Jump or Call
 USRBNK:	DEFS	1		; User's selected bank #
+CURBNK:	DEFS	1		; Current bank #
+SRCBNK:	EQU	HB_SRCBNK	; Move Source Bank #
+DSTBNK:	EQU	HB_DSTBNK	; Move Destination Bank #
 DMABNK:	DEFS	1		; Target bank # for disk xfers
 	DEFS	64		; 32 level stack
 USP:	DEFS	2		; User stack pointer
 
+
 ;======================= End of IBMV-WW ===========================
 

Source/BPBIOS/ramd-ww.z80

@@ -68,9 +68,9 @@ RAMWR2:
 	ADD	A,C		; COMBINE TO GET ACTUAL SOURCE BANK NUM
 	; SETUP FOR INTERBANK COPY
 	LD	C,A		; SOURCE BANK TO C
-	;LD	B,BID_HB	; DEST BANK TO B (HSTBUF IN HBIOS)
-	LD	A,(HBX_BNKBIOS)	; DEST BANK (HSTBUF IN HBIOS)
-	LD	B,A		; PUT IN B
+	LD	B,BID_HB	; DEST BANK TO B (HSTBUF IN HBIOS)
+	;LD	A,(HB_BNKBIOS)	; DEST BANK (HSTBUF IN HBIOS)
+	;LD	B,A		; PUT IN B
 	LD	DE,(HB_DSKBUF)	; DEST ADDRESS TO DE; HL ALREADY HAS SOURCE ADDRESS
 	; REVERSE VALUES IF WRITE
 	POP	AF		; Read or Write?
@@ -81,9 +81,9 @@ RAMWR2:
 	LD	B,A
 RAMWR3:
 	; PERFORM THE COPY
-	CALL	HBX_XCOPY	; SET BANKS FOR COPY
+	CALL	XMOVE		; SET BANKS FOR COPY
 	LD	BC,128		; SET LENGTH OF COPY (ONE SECTOR)
-	CALL	HBX_COPY	; DO THE COPY
+	CALL	MOVE		; DO THE COPY
 	; CLEAN UP AND RETURN
 	XOR	A		; SIGNAL SUCCESS
 	RET			; AND RETURN

Source/BPBIOS/romwbw.lib

@@ -12,46 +12,66 @@ HBIOS	EQU	YES			; Use HBIOS functions
 HBLOC	EQU	0FE00H			; Location of HBIOS proxy
 MEMTOP	EQU	HBLOC - 1		; Last usable address
 ;
+HB_DEBUG	EQU	FALSE		; See hbios.z80 file
+;
+; TODO: Query system via HBIOS API to determine actual size of
+; RAM and ROM, then adjust BPBIOS operation accordingly.
+;
 HB_RAMBANKS	EQU	16		; For systems with 512K of RAM
 ;HB_RAMBANKS	EQU	32		; For systems with 1MB of RAM
 HB_ROMBANKS	EQU	16		; For systems with 512K of ROM
 ;HB_ROMBANKS	EQU	32		; For systems with 1MB of ROM
 ;
-; Set HB_IODEV to appropriate console device
+; Set HB_IODEV to desired HBIOS character device unit number
+;
+; TODO: Query system via HBIOS API to determine number of serial
+; devices available and assign up to 3 of them to the 3 serial
+; device slots in BPBIOS at boot.
 ;
-HB_IODEV	EQU	0		; Assume we want to use first HBIOS serial device
+HB_IODEV	EQU	80H		; 0x80 is current HBIOS console
 ;
-; Set HB_MDDEV to appropriate memory disk driver
+; Set HB_MDRAM/ROM to desired HBIOS disk device numbers
 ;
-HB_MDRAM	EQU	0		; HBIOS Disk Device #0 is normally RAM Disk
-HB_MDROM	EQU	1		; HBIOS Disk Device #1 is normally ROM Disk
+HB_MDRAM	EQU	0		; HBIOS Disk Unit #0 is usually the RAM Disk
+HB_MDROM	EQU	1		; HBIOS Disk Unit #1 is usually the ROM Disk
 ;
-; Set HB_HDDEV to appropriate hard disk driver
+; Set HB_HDDEVN to appropriate HBIOS disk device numbers
 ;
-HB_HDDEV0	EQU	2		; First hard disk is HBIOS Disk Device #2
+; If the RomWBW system has no floppy drives, then the hard disk units
+; will start right after the memory disk units.  So, the first hard disk
+; will be unit #2.  Refer to the DPH entries to see how the HBIOS
+; units are mapped to drive letters.
+;
+HB_HDDEV0	EQU	2		; If no floppy drives in system, first HBIOS hard disk is unit #2
 HB_HDDEV1	EQU	3		; Second hard disk is HBIOS Disk Device #3
 HB_HDDEV2	EQU	4		; Third hard disk is HBIOS Disk Device #4
 ;
 ; Floppy disk support
 ;
-; TODO: Query HBIOS to see if system has floppy drive(s)
+; TODO: Query HBIOS to see if system has floppy drive(s).  For now
+; we do not really support floppy drives.
 ;
 DRV_O		SET	NO		; YES if system has flopy drives
 DRV_P		SET	NO		; YES if system has flopy drives
 ;
-; RAM/ROM disk sizes expressed as count of 2K blocks
+; RAM/ROM disk sizes expressed as count of 2K blocks.  These values
+; are simply derived from values set previously and should.  These
+; lines should not need to be changed.
 ;
 HB_RAMBLKS	EQU	(HB_RAMBANKS - 8) * 16
 HB_ROMBLKS	EQU	(HB_ROMBANKS - 4) * 16
 ;
 ; Layout of RAM banks
 ;
-BID_RAMD	EQU	80H
-BID_RAMM	EQU	80H + HB_RAMBANKS - 9
-BID_SYS		EQU	80H + HB_RAMBANKS - 4
-BID_HB		EQU	80H + HB_RAMBANKS - 3
-BID_USR		EQU	80H + HB_RAMBANKS - 2
-BID_COM		EQU	80H + HB_RAMBANKS - 1
+; TODO: Query system via HBIOS API to determine the actual bank
+; assignments, then adjust BPBIOS operation accordingly.
+;
+BID_RAMD	EQU	-16	; 90h - 16 = 80h
+BID_RAMM	EQU	-9	; 90h - 9 = 87h
+BID_SYS		EQU	-4	; 90h - 4 = 8Ch
+BID_HB		EQU	-3	; 90h - 3 = 8Dh
+BID_USR		EQU	-2	; 90h - 2 = 8Eh
+BID_COM		EQU	-1	; 90h - 1 = 8Fh
 ;
 HB_EI	MACRO
 	EI
@@ -59,4 +79,4 @@ HB_EI	MACRO
 HB_DI	MACRO
 	DI
 	ENDM
-
+

Source/BPBIOS/util.z80

@@ -306,8 +306,11 @@ COUT:
 	PUSH	BC
 	PUSH	DE
 	PUSH	HL
-	LD	C,A
-	CALL	CONOUT
+	;LD	C,A
+	;CALL	CONOUT
+	LD	E,A			; OUTPUT CHAR TO E
+	LD	BC,0180H
+	CALL	HBX_INVOKE
 	POP	HL
 	POP	DE
 	POP	BC

Source/BPBIOS/wboot-ww.z80

@@ -17,19 +17,26 @@ WBOOT:
 	LD	SP,80H		; Use space below default buffer
 	  ENDIF
 	  
+	;CALL	PRTSTRD		; DEBUG
+	;DEFB	'[WBOOT]$'	; DEBUG
+
 	  IF  FASTWB
 	; Restore command processor from
 	; cache in (SYSBNK):100H.  We assume that the
 	; command processor lives in high memory.
+	;
+	; It is critical that we use the HB variants of MOVE and XMOVE
+	; because we are moving between banks even in a non-banked
+	; system!
 	LD	A,(SYSBNK)	; Source bank is SYSBNK
 	LD	C,A		; Put it in C
 	LD	A,(TPABNK)	; Destination bank is TPABNK
 	LD	B,A		; Put it in B
-	CALL	HBX_XCOPY	; Set banks for extended copy
+	CALL	HB_XMOVE		; Set banks for extended copy
 	LD	HL,100H		; Copy from start of cache in SYS
 	LD	DE,(CPADR)	; .. to location of command processor in TPA
 	LD	BC,(CPLEN)	; Length of command processor
-	CALL	HBX_COPY	; Do it
+	CALL	HB_MOVE		; Do it
 ;	call	PRTSTRD		; DEBUG
 ;	defb	CR,LF		; DEBUG
 ;	defb	'WB - copied C'	; DEBUG

Source/BPBIOS/zst.zex

@@ -1,15 +1,15 @@
 ;; Set the ZCPR and ZSDOS paths
-C15:ZPATH $$$$ A0 B0 C15 C0 /D=$$$$ C15 C0
+c15:zpath $$$$ a0 b0 c15 c0 /d=$$$$ c15 c0
 ;; Load ZCPR segments
-jetldr RCP-16H.ZRL,FCP-4T.ZRL,BPBIO.NDR,NZDEC23D.Z3T
-;; Load date/time extension
+jetldr rcp-16h.zrl,fcp-4t.zrl,bpbio.ndr,nzdec23d.z3t
+;; Load date/time extension into user space
 ldtimec
-;; Initialize the RAM disk if needed and copy some useful file there
-if ~EX A0:-RAM.000
-putds -d=A:
-fileattr a0:*.dat /nd
+;; Initialize the RAM disk if needed and copy some useful files there
+if ~ex a0:-ram.000
+putds -d=a:
+relog
 save 0 a:-ram.000
-rcopy ramfiles.txt A0: /Q
+rcopy ramfiles.txt a0: /q
 fi
 ;; Load the command history shell and editor
 lsh

Source/BPBIOS/zstf.zex

@@ -1,15 +1,15 @@
 ;; Set the ZCPR and ZSDOS paths
-C15:ZPATH $$$$ A0 B0 C15 C0 /D=$$$$ C15 C0
+c15:zpath $$$$ a0 b0 c15 c0 /d=$$$$ c15 c0
 ;; Enable clock and turn off last access stamping
 zscfg2 cb +a-
 ;; Load ZCPR segments
-jetldr FCP-4T.ZRL,BPBIO.NDR,NZDEC23D.Z3T
-;; Initialize the RAM disk if needed and copy some useful file there
-if ~EX A0:-RAM.000
-putds -d=A:
-fileattr a0:*.dat /nd
+jetldr fcp-4t.zrl,bpbio.ndr,nzdec23d.z3t
+;; Initialize the RAM disk if needed and copy some useful files there
+if ~ex a0:-ram.000
+putds -d=a:
+relog
 save 0 a0:-ram.000
-rcopy ramfiles.txt A0: /Q
+rcopy ramfiles.txt a0: /q
 fi
 ;; Load the command history shell and editor
 lsh