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||      FILE:   #0164.PLD
||      PROJ:   20170501
||              FD-02 FDC/ATA/DMA BOARD
||      
||      PART:   G16V8-#0164
||
||      DEV :   GAL16V8
||
||      DESC:   USB/VIA DECODER
||
|
|GAL16V8A
|
|| INPUT
|  1:A1, 2:A2, 3:A3, 4:A4, 5:A5, 6:A6, 7:IO, 8:PHI2, 9:RW, 11:PHI0,
| 12:MW0, 13:P1IN, 
|| OUTPUT 
|  14:USB, 15:RD, 16:WE, 17:VIA, 18:GEN, 19:PHI1
|
| ACTIVE-LOW: USB, RD, WE, VIA
|
| PROPERTY:"SIMPLE"
|
| SIGNATURE: "0164    "
|
|| --------------------------------------------------------
||
|  PHI1 = PHI2'                         || inverted phase 2 (connect to P1IN)
|  GATE = PHI0 # PHI2 # P1IN'           || gate enable strobe
|  GEN  = GATE
|  FDD0 = IO' & A6  & A5' & A4          || select FDD0-FDD0
|  SUSB = FDD0 & A3' & A2' & A1'        || usb select FDD0-FDD1
|  VIA  = IO' & A6  & A5' & A4'         || via select FDC0-FDCF
|  USB  = SUSB & GATE                   || usb select FDD0-FDD1
|  RD   = SUSB & RW  & PHI2
|  UW0  = SUSB & RW' & PHI2 & MW0
|  UW1  = SUSB & RW' & PHI0 & MW0'
|  WE   = UW0 # UW1