hbc56ioctrl.pld

Name hbc56ioctrl;
Partno hbc5602;
Revision 02;
Date 3/5/2022;
Designer Troy Schrapel;
Company Troy Schrapel;
Location Australia;
Assembly None;
Device g16v8;

/*
 * Input pins
 */
Pin 1 = a7;
Pin 2 = a8;
Pin 3 = a9;
Pin 4 = a10;
Pin 5 = a11;
Pin 6 = a12;
Pin 7 = a13;
Pin 8 = a14;
Pin 9 = a15;
Pin 11 = a4;
Pin 12 = a5;
Pin 13 = a6;
Pin 14 = !w;

/*
 * Output pins
 */
Pin 15 = !r;
Pin 16 = !intc;
Pin 17 = via;
Pin 18 = !mrq;
Pin 19 = !iorq;

io = !a15 & a14 & a13 & a12 & a11 & a10 & a9 & a8;   /* 0x7fxx */

iorq = io;
mrq = !io;

via = io & a7 & a6 & a5 & a4;      /* 0x7ffx */
intc = io & a7 & a6 & !a5 & a4;    /* 0x7fdx */

r = !w;