;:::::::::::::::::::::::::::::::::::::::::::::::*****************************
;  DPH Pointer Table				** Configuration Dependant **
;  (This table may be in Banked Memory)		*****************************
;
; All access to DPH's are done through this table.  A Zero in this table
; indicates the logical drive does Not exist.  The table is indexed by logical
; drive (e.g. A-P).  To swap logical drives, exchange entries in this table.
;
; 1.0 - 31 Aug 92 - General Release.					HFB
; 0.1 -  3 Jan 92 - Initial Release.					HFB
;:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::

	CSEG
	
; Table has been reordered so that hard disk entries come before
; floppy entries.  This means that "DRV_A" appears as I: and "DRV_E"
; appears as A:.  The point is to allow booting from the first
; hard drive which pretty much needs to be A:

DPHTBL:
	  IF  DRV_E AND HARDDSK
	DEFW	DPH$50		; Dph for Hard drive Partition E
	  ELSE
	DEFW	00
	  ENDIF
	  IF  DRV_F AND HARDDSK
	DEFW	DPH$51		; Dph for Hard drive Partition F
	  ELSE
	DEFW	00
	  ENDIF
	  IF  DRV_G AND HARDDSK
	DEFW	DPH$52		; Dph for Hard drive Partition G
	  ELSE
	DEFW	00
	  ENDIF
	  IF  DRV_H AND HARDDSK
	DEFW	DPH$53		; Dph for Hard drive Partition H
	  ELSE
	DEFW	00
	  ENDIF

	  IF  DRV_I AND HARDDSK
	DEFW	DPH$54		; Dph for Hard drive Partition I
	  ELSE
	DEFW	00
	  ENDIF
	  IF  DRV_J AND HARDDSK
	DEFW	DPH$55		; Dph for Hard drive Partition J
	  ELSE
	DEFW	00
	  ENDIF
	  IF  DRV_K AND HARDDSK
	DEFW	DPH$56		; Dph for Hard drive Partition K
	  ELSE
	DEFW	00
	  ENDIF
	  IF  DRV_L AND HARDDSK
	DEFW	DPH$57		; Dph for Hard drive Partition L
	  ELSE
	DEFW	00
	  ENDIF

	  IF  DRV_A
	DEFW	DPH$00		; Dph for drive A (Floppy)
	  ELSE
	DEFW	00
	  ENDIF
	  IF  DRV_B
	DEFW	DPH$01		; Dph for drive B (Floppy)
	  ELSE
	DEFW	00
	  ENDIF
	  IF  DRV_C
	DEFW	DPH$02		; Dph for drive C (Floppy)
	  ELSE
	DEFW	00
	  ENDIF
	  IF  DRV_D
	DEFW	DPH$03		; Dph for drive D (Floppy)
	  ELSE
	DEFW	0		; Dph for drive D
	  ENDIF

	  IF  DRV_M AND RAMDSK
	DEFW	DPH$90		; Dph for RAM Drive M in DPHM-xx.Z80
	  ELSE
	DEFW	00		; Dph for drive M
	  ENDIF		;ramdsk

	  IF  DRV_N AND HARDDSK
	DEFW	DPH$58		; Dph for Hard drive Partition N
	  ELSE
	DEFW	00
	  ENDIF
	  IF  DRV_O AND HARDDSK
	DEFW	DPH$59		; Dph for Hard drive Partition O
	  ELSE
	DEFW	00
	  ENDIF
	  IF  DRV_P AND HARDDSK
	DEFW	DPH$60		; Dph for Hard drive Partition P
	  ELSE
	DEFW	00
	  ENDIF

;:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
; Disk Parameter Headers (DPH) for Drives	MUST be in Common Memory
;
; The DPH's used have a two byte prefix which indicates the Physical
; Unit # and the Driver Number for the Drive.  The Physical Unit Number
; is Controller specific, while the driver number is used to select
; which service routines are to be called to satisfy service requests.
;:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::

; Drive Type Byte
; ---------------
; D D D D D D D D
; 7 6 5 4 3 2 1 0
; | | | | | +-+-+--- Disk Size: 000=Fixed Disk, 001=8", 010=5.25", 011=3.5"
; | | | | +--------- 0 = Single Sided, 1 = Double Sided
; | | | +----------- 0 = Normal Step, 1 = Double-Step Drive
; | | +------------- 0 = Motor Always On, 1 = Drive Motor Control needed
; | +--------------- 0 = Max Speed is Normal 5.25" (300rpm)
; |		     1 = 8" and Hi-Density 5.25" Max Speed (360rpm)
; +----------------- 0 = Double-Density, 1 = Single-Density

FIXDSK	EQU	00000000B
DSK8	EQU	00000001B
DSK5	EQU	00000010B
DSK3	EQU	00000011B
SS	EQU	00000000B
DS	EQU	00001000B
DD	EQU	00000000B
SD	EQU	10000000B
DVSPDH	EQU	01000000B
DVSPDL	EQU	00000000B
MTR	EQU	00100000B
NOMTR	EQU	00000000B
DBLSTP	EQU	00010000B
NODBLS	EQU	00000000B

	CSEG

	  IF  DRV_A
XDPH00:	DB	LOCKF		; Format lock flag
	DB	DSK5+DS+DD+DVSPDL+MTR ; Disk drive type
	DB	1		; Driver id
	DB	0		; Physical drive number
DPH$00:	DW	0		; Skew table pointer
	DW	0,0,0		; Scratch area
	DW	DIRBUF		; Directory buffer pointer
	  IF  AUTOSL		; For autoselection, we need RAM Space
	DEFW	DPB$00+DPHDSZ	; Ram area for DPB #0
	  ELSE
	DW	DPBRA		; Pointer to current DPB for Drive 0
	  ENDIF
	DW	CHK$00		; Wacd for drive 00
	DW	ALV$00		; Alloc vector for 00

XDPHSZ	EQU	$-XDPH00	; Calc for xdph size
XDPHOF	EQU	DPH$00-XDPH00	; Offset from xdph to dph
	  ENDIF		;Drv_a
	  IF  DRV_B
XDPH01:	DB	LOCKF		; Format lock flag
	DB	DSK5+DS+DD+DVSPDL+MTR ; Disk drive type
	DB	1		; Driver id
	DB	1		; Physical drive number
DPH$01:	DW	0		; Skew table pointer
	DW	0,0,0		; Scratch area
	DW	DIRBUF		; Directory buffer pointer
	  IF  AUTOSL
	DEFW	DPB$01+DPHDSZ	; Ram space for DPB #1
	  ELSE
	DW	DPBRB		; Pointer to current DPB for Drive 1
	  ENDIF
	DW	CHK$01		; Wacd for drive 01
	DW	ALV$01		; Alloc vector for 01
	  ENDIF		;Drv_b
	  IF  DRV_C
XDPH02:	DB	LOCKF		; Format lock flag
	DB	DSK5+DS+DD+DVSPDL+MTR ; Disk drive type
	DB	1		; Driver id
	DB	2		; Physical drive number
DPH$02:	DW	0		; Skew table pointer
	DW	0,0,0		; Scratch area
	DW	DIRBUF		; Directory buffer pointer
	  IF  AUTOSL
	DEFW	DPB$02+DPHDSZ	; Ram space for DPB #2
	  ELSE
	DW	DPBRA		; Pointer to current DPB for Drive #2
	  ENDIF
	DW	CHK$02		; Wacd for drive 02
	DW	ALV$02		; Alloc vector for 02
	  ENDIF
	  IF  DRV_D
XDPH03:	DB	LOCKF		; Format lock flag
	DB	DSK3+sS+DD+DVSPDl+MTR ; Disk drive type
	DB	1		; Driver id
	DB	3		; Physical drive number
DPH$03:	DW	0		; Skew table pointer
	DW	0,0,0		; Scratch area
	DW	DIRBUF		; Directory buffer pointer
	  IF  AUTOSL
	DEFW	DPB$03+DPHDSZ	; Ram space for DPB #3
	  ELSE
	DW	DPBRA		; Pointer to current DPB for Drive #3
	  ENDIF
	DW	CHK$03		; Wacd for drive 03
	DW	ALV$03		; Alloc vector for 03
	  ENDIF		;Drv_d

; Directory Buffer Allocation.	Only One Directory Buffer is required.  Since
; we want it to be the first item in DSEG, it must be placed here.

	DSEG

	  IF  BANKED
DIRBUF	EQU	CBOOT	; Resident Init code in here
	  ELSE
DIRBUF	EQU	$
	  ENDIF
	ORG	DIRBUF+128	; Directory buffer

; If we are using autoselection of drives, we copy the XDPB/DPB structure
; for the identified format to RAM thereby allowing emulation of formats by
; installing data for the desired format and locking the DPH.  For Non-auto-
; select, we simply point to the read-only structure defined in DPB.LIB.

	  IF  AUTOSL
	   IF  DRV_A
DPB$00:	DEFS	DPBSIZ		; Size of XDPB+DPB
	   ENDIF
	   IF  DRV_B
DPB$01:	DEFS	DPBSIZ
	   ENDIF
	   IF  DRV_C
DPB$02:	DEFS	DPBSIZ
	   ENDIF
	   IF  DRV_D
DPB$03:	DEFS	DPBSIZ
	   ENDIF
	  ENDIF		;autosel

	  IF  [BANKED AND ZSDOS2]
	COMMON  /B2RAM/
	  ELSE
	DSEG
	  ENDIF

; Directory Check Buffers.  Each Buffer MUST be NDE/4 Bytes long at minimum.
;  Each Logical Drive with removable media MUST have its own check buffer.

	  IF  DRV_A
CHK$00:	DEFS	[MXFDIR/4]+1	; Enough for 256 dir entries
	  ENDIF
	  IF  DRV_B
CHK$01:	DEFS	[MXFDIR/4]+1	; Enough for 256 dir entries
	  ENDIF
	  IF  DRV_C
CHK$02:	DEFS	[MXFDIR/4]+1	; Enough for 256 dir entries
	  ENDIF
	  IF  DRV_D
CHK$03:	DEFS	[MXFDIR/4]+1	; Enough for 256 dir entries
	  ENDIF

; Allocation BitMap Buffers.  Each MUST be NAB/8 Bytes at Minimum.
;  Each Logical Floppy Drive MUST have an Allocation BitMap Buffer.

	  IF  DRV_A
ALV$00:	DEFS	[MXFALC/8]+1	; Enough for 800 KB or 1.44 MB drives
	  ENDIF
	  IF  DRV_B
ALV$01:	DEFS	[MXFALC/8]+1	; Enough for 800 KB or 1.44 MB drives
	  ENDIF
	  IF  DRV_C
ALV$02:	DEFS	[MXFALC/8]+1	; Enough for 800 KB or 1.44 MB drives
	  ENDIF
	  IF  DRV_D
ALV$03:	DEFS	[MXFALC/8]+1	; Enough for 800 KB or 1.44 MB drives
	  ENDIF

;======================= End of DPH.LIB =======================