*IDENTIFICATION
Adressdecoder-GAL2 mit Umschaltm”glichkeit zwishen altem und neuen TOS
30.07.1992 by WWS
erzeugt DTACK-Signal bei Speicherzugriffen auf $E00000 bis $E3FFFF
*X-NAMES
r_w, a18, a19, a20, a21, a22, a23, as, masse, ce_in, sel;
*Y-NAMES
dtack, ce_out, ce;
*LEVEL
HIGH;
LOW = as, ce_in, ce_out, ce;
*BOOLEAN-EQUATIONS
dtack = masse;
dtack.oe = a23 & a22 & a21 & /a20 & /a19 & /a18 & r_w & as;
ce_out=ce_in & sel;
ce_out.oe=VCC;
ce = a23 & a22 & a21 & /a20 & /a19 & /a18 & r_w & as & /sel
+ ce_in & /sel;
ce.oe =VCC;
*PLD
TYPE = GAL16V8_C7;
CHECKSUM = COMPUTE;
*PINS
r_w = 1, a18 = 3, a19 =4, a20 =5, a21 =6, a22 =7, a23 =8,
as = 9, masse = 11, dtack = 12, ce_in = 13, ce_out = 14,
sel =16,
ce =17;
*RUN-CONTROL
LISTING = SYMBOLTAB, NETTAB, EQUATIONS, PINOUT, FUSEPLOT;
PROGFORMAT = JEDEC;
*END
 
