;**	DISK PARAMETER TABLE EQUATES
;

;	DISK PARAMETER ENTRY DESCRIPTION

	ORG	0
DPEXLT	RW	1		;SECTOR TRANSLATE TABLE ADDRESS
	RW	3
DPEDIRB	RW	1		;DIRECTORY BUFFER ADDRESS
DPEDPB	RW	1		;DISK PARAMETER BLOCK ADDRESS
DPECSV	RW	1		;CHECKSUM VECTOR ADDRESS
DPEALV	RW	1		;ALLOCATION VECTOR ADDRESS
DPEHTH	RB	8		;HEATH EXTENSIONS
DPEL	EQU	24		;LENGTH OF DISK PARAMETER ENTRY

;	HEATH EXTENSIONS

DPEFLAG	EQU	DPEHTH+0	;FLAGS
DPETYPE	EQU	11100000B	;BIT 7-5 = DEVICE TYPE
DPENE	EQU	00000000B	; NON-EXISTENT
DPEZ207	EQU	00100000B	; Z207
DPEZ217	EQU	01000000B	; Z217
DPE48RO	EQU	00010000B	;BIT 4 -- FOR Z207
				;  48 TPI MEDIA IN 96 TPI DRIVE (R/O)
DPE96T	EQU	00001000B	;BIT 3 -- 0=48 TPI DRIVE  1=96 TPI DRIVE
DPEASGN	EQU	00001000B	;BIT 3 -- FOR Z217 WINCHESTER DISK
				;         0=UNASSIGNED A PARTITION
				;         1=ASSIGNED A PARTITION
DPET0SD	EQU	00000100B	;BIT 2 -- 1=TRACK 0 IS SINGLE DENSITY
DPEDD	EQU	00000010B	;BIT 1 -- 0=SINGLE DENSITY  1=DOUBLE
DPELSIO	EQU	00000010B	;BIT 1 -- Z217 LOGICAL SECTOR I/O
DPE2S	EQU	00000001B	;BIT 0 -- 0=SINGLE SIDED  1=DOUBLE
DPEPRIM	EQU	00000001B	;BIT 0 -- Z217 PRIMARY DPE FOR UNIT

DPEUNIT	EQU	DPEHTH+1	;UNIT SELECT VALUE
DPERPS	EQU	DPEHTH+2	;CP/M RECORDS PER PHYSICAL SECTOR
DPERPAB	EQU	DPEHTH+3	;CP/M RECORDS PER ALLOCATION BLOCK
DPETRK	EQU	DPEHTH+4	;TRACK COUNTER
DPEUNK	EQU	10000000B	; TRACK POSITION UNKNOWN
DPELPB	EQU	DPEHTH+4	;Z217 LOWER PARTITION BOUNDARY (LOG SECTOR #)
DPESEK	EQU	DPEHTH+5	;MOTOR SPEED AND SEEK SPEED
				;BIT 3-0 = SEEK SPEED VALUE
DPEFS	EQU	01000000B	;BIT 6 = FAST STEP FOR Z207
DPEMO	EQU	10000000B	;BIT 7 = MOTOR UP TO SPEED FLAG
				;  0=1 SEC  1=250 MSEC
DPEUPB	EQU	DPEHTH+6	;Z217 UPPER PARTITION BOUNDARY + 1
DPEFLG2	EQU	DPEHTH+6	;2ND FLAG BYTE
DPEHLS	EQU	00000100B	;BIT 2  DRIVE HAS HEAD LOAD SELONOID
DPEIMG	EQU	00000010B	;BIT 1  IMAGINARY DRIVE
DPE96TM	EQU	00000001B	;BIT 0  0=48 TPI MEDIA  1=96 TPI MEDIA
DPELUN	EQU	DPEHTH+7	;LAST LOGICAL UNIT MOUNTED
DPELOG	EQU	11110000B	; CP/M LOGICAL DRIVE NAME FOR THIS ENTRY
DPEREAL	EQU	00001111B	; FOR IMAGINARY DRIVE, LOGICAL DRIVE NAME
				;  FOR CORRESPONDING REAL DRIVE
DPEMNT	EQU	00001111B	; FOR REAL DRIVE, LOGICAL DRIVE NAME FOR
				;  CURRENLY MOUNTED DISK

DPEHL	EQU	8		;LENGTH OF HEATH EXTENSION

;	DISK PARAMETER BLOCK

	ORG	0
DPBSPT	RW	1		;SECTORS PER TRACK
DPBBSH	RB	1		;BLOCK SHIFT FACTOR
DPBBLM	RB	1		;BLOCK MASK
DPBEXM	RB	1		;EXTENT MASK
DPBDSM	RW	1		;TOTAL # OF BLOCKS - 1
DPBDRM	RW	1		;# OF DIRECTORY ENTRIES - 1
DPBAL0	RB	1		;INITIAL AL0 VALUE
DPBAL1	RB	1		;INITIAL AL1 VALUE
DPBCKS	RW	1		;SIZE OF DIRECTORY CHECK VECTOR
DPBOFF	RW	1		;NUMBER OF SYSTEM TRACKS
DPBL	EQU	15		;LENGTH OF DISK PARAMETER BLOCK