Scsi-control logic

#		date		description 					by
--		--------	------------------------------------------      ----
01		03/09/95	initial version					BDJ
02		06/09/95	change for using flipflop for /ack		BDJ

(c) Bas de Jong

CHIP  scsi p16v8

; pin  1      2      3      4      5      6      7      8      9      10
       dtack  scsi   a1     a2     rw     /bsy   /req   /msg   /io    GND

; pin  11     12     13     14     15     16     17     18     19     20
       oe     /irq   sel    /ackff /clr   /wrd   /oed   /rdd   /rds   VCC

@ues scsi

@define  SaData   "scsi * /a2 * /a1"
@define  SaCsr    "scsi * /a2 *  a1"
@define  SaSel    "scsi *  a2 * /a1"

EQUATIONS

sel	=	SaSel * /rw

clr	=	SaSel *  rw +
		bsy

ackff	=	SaData

oed	=	/msg * /io * rw

wrd	=	SaData * /rw +
		SaSel * /rw

rdd	=	SaData * rw

rds	=	SaCsr  * rw

irq	=	req * /scsi