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1995-11-25
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862b
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53 lines
PC Adapter für VME Bus
Adressen IO und Memory in FE000000 abbilden
*IDENTIFICATION
VME_PC;
*TYPE
GAL20V8;
*PINS
/AS = 23,
/WR = 2,
/DS0 = 3,
/DS1 = 4,
A21 = 5,
A22 = 6,
A23 = 7,
T1 = 8,
T2 = 9,
/WAIT = 10,
A20 = 11,
/DTACK.T = 15,
T_START.T = 18,
/SBHE.T = 17,
A0.T = 16,
/MWR.T = 22,
/MRD.T = 21,
/IOW.T = 20,
/IOR.T = 19;
*BOOLEAN-EQUATIONS
DTACK = /A22 & /A23 & (DS1 + DS0) & AS & T2 & /WAIT;
T_START = /A22 & /A23 & AS & (DS0 + DS1);
IOW = A21 & /A22 & /A23 & AS & DS1 & WR & T1;
IOR = A21 & /A22 & /A23 & AS & DS1 & /WR & T1;
MWR = /A21 & /A22 & /A23 & AS & (DS0 + DS1) & WR & T1;
MRD = /A21 & /A22 & /A23 & AS & (DS0 + DS1) & /WR & T1;
SBHE = /A21 & /A22 & /A23 & AS & (DS0 & DS1 + DS0 & /DS1);
A0 = /A21 & /A22 & /A23 & AS & /DS1 & DS0 +
A21 & /A22 & /A23 & AS & A20;
*END