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Copy pathU87_revision_7.PLD
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U87_revision_7.PLD
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Name IBM-5170-U87 ;
PartNo 00 ;
Date 26-01-2023 ;
Revision 07 ;
Designer Rodney & Johann ;
Company - ;
Assembly None ;
Location None ;
Device G16V8A;
/* *************** INPUT PINS *********************/
PIN 15=XA0;
PIN 16=XBHE;
PIN 1=RAS;
PIN 2=MEMW;
PIN 3=IOR;
PIN 4=AIOW;
PIN 5=Q1;
PIN 6=IO_CS_16;
PIN 7=AEN_1;
PIN 8=AEN_2;
PIN 9=Q4;
PIN 11=FSYS_16;
PIN 13=RES_0WS;
/* *************** OUTPUT PINS *********************/
PIN 12=END_CYC;
PIN 14=DMA_AEN;
PIN 17=GATE_245;
PIN 18=DIR_245;
PIN 19=DATA_CONV;
!XBHE.oe = DMA_AEN;
XA0.oe = !AEN_2;
RES_0WS.oe = 'b'0;
XBHE = AEN_2 & !XA0;
XA0 = 'b'0;
DMA_AEN = AEN_1 & AEN_2;
!DATA_CONV =
AEN_1 & AEN_2 & !FSYS_16 & Q1 & RAS & !XA0 & !XBHE
# AEN_1 & AEN_2 & !IOR & IO_CS_16 & Q1 & !XA0 & !XBHE
# AEN_1 & AEN_2 & AIOW & IO_CS_16 & Q1 & !XA0 & !XBHE;
!DIR_245 =
!AEN_1 & MEMW & RAS
# AEN_1 & AEN_2 & !MEMW & !XBHE
# AEN_1 & AEN_2 & AIOW & !XBHE;
!END_CYC =
FSYS_16 & Q1 & RAS
# !IOR & !IO_CS_16 & Q1
# AIOW & !IO_CS_16 & Q1
# RAS & !RES_0WS
# AIOW & !RES_0WS
# Q4;
!GATE_245 =
FSYS_16 & RAS & !AEN_1 & !XBHE
# FSYS_16 & !AEN_1 & !IOR & !XBHE
# AEN_1 & IO_CS_16 & XA0 & !IOR & !XBHE
# AEN_1 & AIOW & IO_CS_16 & XA0 & !XBHE
# AEN_1 & RAS & XA0 & !FSYS_16 & !XBHE
# AEN_1 & XA0 & !FSYS_16 & !MEMW & !XBHE;