; Equations for Apple IIc GLU Chip 342-0243-A
; Decompiled and labeled by Matthew D'Asaro, 2016

; JED2EQN -- JEDEC file to Boolean Equations disassembler (Version V063)
; Copyright (c) National Semiconductor Corporation 1990-1993
; Disassembled from A2CGLU.jed. Date: 10-4-2016

chip PAL20X4 PAL20X4

; Inputs:
14M=1
A0=2
A3=3
A4=4
A5=5
A6=6
A7=7
PH0=8
/SELIO=9
GR=10
/RESET=11

; Outputs:
/GLUEN=13
MD7=14
/RW=15
TEXT=16
/DISK=21
IOUHOLE=22
/SER=23  

; Feedbacks:
IOUDIS=17
/DHIRES=18
CREF=19
7M=20

; Power:
GND=12
VCC=24

equations

SER = A4 * /A5 * /A6 * A7 * PH0 * SELIO
    + /A4 * A5 * /A6 * A7 * PH0 * SELIO
/SER.oe = VCC

/IOUHOLE = A3 * A4 * /A5 * A6 * /A7 * PH0 * IOUDIS * SELIO
IOUHOLE.oe = VCC

DISK = /A4 * A5 * A6 * A7 * PH0 * SELIO
/DISK.oe = VCC

/7M := 7M
7M.oe = GLUEN

/CREF := /RESET * RESET
    + CREF
  :+: /7M
CREF.oe = GLUEN

; This implements the DHIRESON / DHIRESOFF soft switch
DHIRES := A3 * A4 * /A5 * A6 * /A7 * PH0 * IOUDIS * SELIO * /RESET
    + DHIRES * /RESET
  :+: A0 * A3 * A4 * /A5 * A6 * /A7 * PH0 * IOUDIS * SELIO
    + RESET
/DHIRES.oe = GLUEN

; This implements the IOUDISON / IOUDISOFF soft switch
/IOUDIS := A3 * A4 * A5 * A6 * /A7 * PH0 * SELIO * RW * /RESET
         + /IOUDIS * /RESET
        :+: /A0 * A3 * A4 * A5 * A6 * /A7 * PH0 * SELIO * RW * /RESET
IOUDIS.oe = GLUEN

/TEXT = /DHIRES * GR
TEXT.oe = VCC

/MD7 =  A0 * /A3 * /GR
     +  A0 *  A3 *  DHIRES
     + /A0 *  A3 * /IOUDIS
MD7.oe = A4 * A5 * A6 * /A7 * PH0 * SELIO * /RW