; BIOSDSKE.INC - 5/3/86 - Hardware configuration constants.
; Used by BOOT, SBIOS, CBIOS, MAKESYS

; Target machine, set one of these to true.

xerox	equ	true
bigbrd	equ	false

hv1791	equ	false		; Set true if 1791 controller

; Disk stuff:

mxdrv	equ	4	; # of disk drives supported.

five	equ	1	; Value for 40 trk 5"
bfive	equ	2	; Value for 80 trk 5"
eight	equ	3	; Value for 8"

dsize	equ	eight	; Set to five, bfive, or eight

	if	dsize eq five
spt	equ	18	; Sectors / track on 5"
tracks	equ	40	; Tracks on 5"
stept	equ	3	; Step time for 5"
msprev	equ	210	; ms per revolution
	endif

	if	dsize eq bfive
spt	equ	18	; Sectors / track on 5"
tracks	equ	80	; Tracks on 5"
stept	equ	3	; Step time for 5"
msprev	equ	210	; ms per revolution
	endif

	if	dsize eq eight
spt	equ	26	; Sectors / track on 8"
tracks	equ	77	; # tracks on 8"
	if	hv1791
stept	equ	1	; Step time for 8", 1791
	else
stept	equ	0	; Step time for 8", 1771
	endif
msprev	equ	175	; ms per revolution
	endif

; Set xrxsds true if side select is done in the Xerox fashion,
; i.e. if C is the back of A and D is the back of B.

xrxsds	equ	true

whirtm	equ	15	; Seconds to let disk motor whir
secsiz	equ	128	; Size of a disk sector