; JED2EQN -- JEDEC file to Boolean Equations disassembler (Version V063)
; Copyright (c) National Semiconductor Corporation 1990-1993
; Disassembled from JJ074-V1-CM2-U5-AMDPALCE16V8H-25-CS78EC.JED. Date: 2022-03-12
;$GALMODE SMALL

chip J074-V1-CM2-U5-AMDPALCE16V8H-25-CS78EC GAL16V8

/DS	=	1	; data strobe
CM2	=	2	; 
CM1	=	3	; 
CM0	=	4	; 
A3	=	5	; 
A2	=	6	; 
A1	=	7	; 
A0	=	8	; 
/AD	=	9	; address selected, from LS688
GND	=	10	; 
T0	=	11	; time 0 = start of read or write pulse
T1	=	12	; time 1 = end of write pulse
/SWEN	=	13	; enable switch buffer to read them.
/DMACK	=	14	; DMA acknowledge
/RD	=	15	; read
/WR	=	16	; write
/CS	=	17	; chip select
/GO	=	18	; enable data buffer 
f19	=	19	; unused?
VCC	=	20 

@ues 0000000000000000

equations

; The lines
never	= CM2 * /CM2 * /DS * DS * CM1 * /CM1 * f19 * /f19 * CM0 * /CM0 * A3 * /A3 * A2 * /A2 * A1 * /A1 * A0 * /A0 * T1 * /T1 * /AD * AD * T0	* /DS1
; never happen.

base		= AD * DS * CM2 * /CM1
read		= CM0
write		= /CM0
register_0_to_7	= /A3
register_8	= A3 * /A2 * /A1 * /A0
register_9	= A3 * /A2 * /A1 *  A0	

GO 	= base * register_0_to_7
	+ base * register_8
	+ base * register_9 * read

	+ never
	+ never
	+ never
	+ never
	+ never

CS 	= base * register_0_to_7

	+ never
	+ never
	+ never
	+ never
	+ never
	+ never
	+ never

WR 	= base * write * register_0_to_7   * /T1 * T0
	+ base * write * register_8        * /T1 * T0

	+ never
	+ never
	+ never
	+ never
	+ never
	+ never

RD 	= base * read * register_0_to_7 * T0
	+ base * read * register_8      * T0

	+ never
	+ never
	+ never
	+ never
	+ never
	+ never

DMACK 	= base * register_8

	+ never
	+ never
	+ never
	+ never
	+ never
	+ never
	+ never

SWEN 	= base * register_9 * read

	+ never
	+ never
	+ never
	+ never
	+ never
	+ never
	+ never