PAGE
;BIOS9 - Data Storage.


;	Physical data buffer address ((DMAADR) or HSTBUF)
	ALIGN	2
BUFADR:	DW	HSTBUF		;Lower 16 bits (least, middle)
BUFSEG:	DW	BioSeg		;Buffer's segment

;	User data buffer address

DMAADR:	DW	HSTBUF		;Lower 16 bits (least, middle)
DMASEG:	DW	BioSeg		;User's segment
	SPACE	4,10
;	BIOS blocking / deblocking flags.

HSTACT:	DB	0		;host active flag
HSTWRT:	DB	0		;host written flag
UNACNT:	DB	0		;unalloc rec CNT
UNATRK:	DW	0		;Track
UNASEC:	DB	255		;Sector
LOGSEC	DB	0		;Logical sector
	SPACE	4,10
;	Area for storage of hard disk cylinders.

HDCYL:
	ECHO	NOHRD/2
	DB	-1
	ENDM
	SPACE	4,10
;	End of inititialized areas.
;	No more data after here.
;	Check for exceeding boot track capacity (when LOADER.CMD).
BIDLWA:
	IF	@LDR
;	ASSERT	BIDLWA <= BIOS+900h	;COPYSYS restriction
	MSG	'Track 0 space needed= ', BIDLWA-BIOS, 'h'
	if	bidlwa < bios+900h
	ds	bios+900h-bidlwa-1
	db	0
	endif
	ENDIF


;	CP/M disk work space.
	ALIGN	2
ALV:	DS	ALVS
CSV:	DS	CSVS
	PAGE
;	Disk access information.
;	This area is organized into the following groups
;		sector number
;		track number
;		disk drive
;		drive type
;	Each of these groups has three cells for the
;	current disk request, ACTual disk transfer,
;	and active host disk.

SEKSEC:	DS	1		;Current request
SEKTRK:	DS	2		;Current request
SEKDSK:	DS	1		;Current request
SEKTYP:	DS	1		;Current disk's type

ACTSEC:	DS	1		;Actual transfer operation
ACTTRK:	DS	2		;Actual transfer operation
ACTDSK:	DS	1		;Actual transfer operation
ACTTYP:	DS	1		;Actual disk's type

HSTSEC:	DS	1		;Active host disk
HSTTRK:	DS	2		;Active host disk
HSTDSK:	DS	1		;Active host disk
HSTTYP:	DS	1		;Active disk's type
	SPACE	4,10
;	Disk transfer flags and counters.

RDFLAG:	DS	1		;Read flag
ERFLAG:	DS	1		;Error reporting
WRTYPE:	DS	1		;Write operation type

SAVSEC:	DS	1		;Save sector

CIOPL:	EQU	9
CIOPB:	DS	CIOPL		;Disk command buffer
TEMPBF:	DS	8		;Result status cells

	ALIGN	16
DIRBUF:	DS	128		;Directory buffer
STACKP:
HSTBUF:	DS	HSTSIZ		;Host buffer

	ALIGN	16
BIOLWA:
SYSEND:	EQU	(BIOLWA shr 4)+BIOSEG
	MSG	'Bios Length = $',BIOLWA-BIOS,'h'
	MSG	'System Paragraph = $',BIOSEG,'h'
	MSG	'End of System = $',SYSEND,'0h'



;	Endx	BIOS9