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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1 | - | 1 | || FILE: #0164.PLD |
| 2 | || PROJ: 20170501 |
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| 3 | || FD-02 FDC/ATA/DMA BOARD |
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| 4 | || |
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| 5 | || PART: G16V8-#0164 |
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| 6 | || |
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| 7 | || DEV : GAL16V8 |
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| 8 | || |
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| 9 | || DESC: USB/VIA DECODER |
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| 10 | || |
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| 11 | | |
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| 12 | |GAL16V8A |
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| 13 | | |
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| 14 | || INPUT |
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| 15 | | 1:A1, 2:A2, 3:A3, 4:A4, 5:A5, 6:A6, 7:IO, 8:PHI2, 9:RW, 11:PHI0, |
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| 16 | | 12:MW0, 13:P1IN, |
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| 17 | || OUTPUT |
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| 18 | | 14:USB, 15:RD, 16:WE, 17:VIA, 18:GEN, 19:PHI1 |
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| 19 | | |
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| 20 | | ACTIVE-LOW: USB, RD, WE, VIA |
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| 21 | | |
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| 22 | | PROPERTY:"SIMPLE" |
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| 23 | | |
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| 24 | | SIGNATURE: "0164 " |
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| 25 | | |
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| 26 | || -------------------------------------------------------- |
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| 27 | || |
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| 28 | | PHI1 = PHI2' || inverted phase 2 (connect to P1IN) |
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| 29 | | GATE = PHI0 # PHI2 # P1IN' || gate enable strobe |
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| 30 | | GEN = GATE |
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| 31 | | FDD0 = IO' & A6 & A5' & A4 || select FDD0-FDD0 |
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| 32 | | SUSB = FDD0 & A3' & A2' & A1' || usb select FDD0-FDD1 |
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| 33 | | VIA = IO' & A6 & A5' & A4' || via select FDC0-FDCF |
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| 34 | | USB = SUSB & GATE || usb select FDD0-FDD1 |
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| 35 | | RD = SUSB & RW & PHI2 |
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| 36 | | UW0 = SUSB & RW' & PHI2 & MW0 |
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| 37 | | UW1 = SUSB & RW' & PHI0 & MW0' |
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| 38 | | WE = UW0 # UW1 |