;:::::::::::::::::::::::::::::::::::::::::::::::*****************************
;  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.
; Default drive ordering is RAM (A), ROM (B), 8 logical drives from 1st 
; Hard drive (C-J), 4 logical drives from the second Hard drive (M-P) and
; two Floppy drives (O&P),.  BPCNFG can be used to rearrange drive order 
; to suit the user.
;
; 1.0 - 31 Aug 92 - General Release.					HFB
; 0.1 -  3 Jan 92 - Initial Release.					HFB
;:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::

	CSEG

; Note: ROMWBW boots from any disk on demand so order of table not
; important with regards to booting from disks rather than ROM.

DPHTBL:
	  IF  DRV_A
	DEFW	DPH$90		; Dph for drive A (RAM)
	  ELSE
	DEFW	00
	  ENDIF	;DRV_A
;
	  IF  DRV_B
	DEFW	DPH$91		; Dph for drive B (ROM)
	  ELSE
	DEFW	00
	  ENDIF	;DRV_B
;
	  IF  DRV_C AND HARDDSK
	DEFW	DPH$50		; Dph for Hard drive Partition C
	  ELSE
	DEFW	0
	  ENDIF	;DRV_C AND HARDDSK
;
	  IF  DRV_D AND HARDDSK
	DEFW	DPH$51		; Dph for Hard drive Partition D
	  ELSE
	DEFW	0
	  ENDIF	;DRV_D AND HARDDSK
;
	  IF  DRV_E AND HARDDSK
	DEFW	DPH$52		; Dph for Hard drive Partition E
	  ELSE
	DEFW	00
	  ENDIF	;DRV_E AND HARDDSK
;
	  IF  DRV_F AND HARDDSK
	DEFW	DPH$53		; Dph for Hard drive Partition F
	  ELSE
	DEFW	0
	  ENDIF	;DRV_F AND HARDDSK
;
	  IF  DRV_G AND HARDDSK
	DEFW	DPH$54		; Dph for Hard drive Partition G
	  ELSE
	DEFW	0
	  ENDIF	;DRV_G AND HARDDSK
;
	  IF  DRV_H AND HARDDSK
	DEFW	DPH$55		; Dph for Hard drive Partition H
	  ELSE
	DEFW	0
	  ENDIF	;DRV_H AND HARDDSK
;
	  IF  DRV_I AND HARDDSK
	DEFW	DPH$56		; Dph for Hard drive Partition I
	  ELSE
	DEFW	0
	  ENDIF	;DRV_I AND HARDDSK
;
	  IF  DRV_J AND HARDDSK
	DEFW	DPH$57		; Dph for Hard drive Partition J
	  ELSE
	DEFW	00
	  ENDIF	;DRV_J AND HARDDSK
;
	  IF  DRV_K AND HARDDSK
	DEFW	DPH$58		; Dph for Hard drive Partition K
	  ELSE
	DEFW	00
	  ENDIF	;DRV_K AND HARDDSK
;
	  IF  DRV_L AND HARDDSK
	DEFW	DPH$59		; Dph for Hard drive Partition L
	  ELSE
	DEFW	00
	  ENDIF	;DRV_L AND HARDDSK
;
	  IF  DRV_M AND HARDDSK
	DEFW	DPH$60		; Dph for Hard drive Partition M
	  ELSE
	DEFW	00
	  ENDIF	;DRV_M AND HARDDSK
;
	  IF  DRV_N AND HARDDSK
	DEFW	DPH$61		; Dph for Hard drive Partition N
	  ELSE
	DEFW	00
	  ENDIF	;DRV_N AND HARDDSK
;
	  IF  DRV_O AND FLPYDSK
	DEFW	DPH$00		; Dph for drive O (First Floppy)
	  ELSE
	DEFW	00
	  ENDIF	;DRV_O
;
	  IF  DRV_P AND FLPYDSK
	DEFW	DPH$01		; Dph for drive P (Second Floppy)
	  ELSE
	DEFW	00
	  ENDIF	;DRV_P
;
;:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
; 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
; Floppy Headers
	  IF  DRV_O AND FLPYDSK
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_O
;
	  IF  DRV_P AND FLPYDSK
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	;AUTOSL
	DW	CHK$01		; Wacd for drive 01
	DW	ALV$01		; Alloc vector for 01
	  ENDIF		;Drv_P
;
; Third and fourth floppy drives removed
;	  IF  DRV_E
;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_F
;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_F

; 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	;BANKED
	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 AND FLPYDSK
	   IF  DRV_O
DPB$00:	DEFS	DPBSIZ		; Size of XDPB+DPB
	   ENDIF	;DRV_O
;
	   IF  DRV_P
DPB$01:	DEFS	DPBSIZ
	   ENDIF	;DRV_P
;
; Third and fourth floppy drives removed
;	   IF  DRV_E
;DPB$02:	DEFS	DPBSIZ
;	   ENDIF
;	   IF  DRV_F
;DPB$03:	DEFS	DPBSIZ
;	   ENDIF
	  ENDIF		;autosel

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

; 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_O AND FLPYDSK
CHK$00:	DEFS	[MXFDIR/4]+1	; Enough for 256 dir entries
	  ENDIF
;
	  IF  DRV_P AND FLPYDSK
CHK$01:	DEFS	[MXFDIR/4]+1	; Enough for 256 dir entries
	  ENDIF
;
;	  IF  DRV_E
;CHK$02:	DEFS	[MXFDIR/4]+1	; Enough for 256 dir entries
;	  ENDIF
;	  IF  DRV_F
;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_O AND FLPYDSK
ALV$00:	DEFS	[MXFALC/8]+1	; Enough for 800 KB or 1.44 MB drives
	  ENDIF
;
	  IF  DRV_P AND FLPYDSK
ALV$01:	DEFS	[MXFALC/8]+1	; Enough for 800 KB or 1.44 MB drives
	  ENDIF
;	  IF  DRV_E
;ALV$02:	DEFS	[MXFALC/8]+1	; Enough for 800 KB or 1.44 MB drives
;	  ENDIF
;	  IF  DRV_F
;ALV$03:	DEFS	[MXFALC/8]+1	; Enough for 800 KB or 1.44 MB drives
;	  ENDIF

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