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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1 | - | 1 | || FILE: #0052.PLD |
| 2 | || PROJ: 20120601 |
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| 3 | || PART: G26CV12-#0052 |
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| 4 | || |
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| 5 | || DEV : GAL26CV12 |
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| 6 | || |
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| 7 | || DESC: DECODER I/O |
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| 8 | || |
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| 9 | | |
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| 10 | |GAL26CV12 |
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| 11 | | |
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| 12 | || INPUT |
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| 13 | | 1:A8, 2:A9, 3:A10, 4:A11, 5:A12, 6:A13, 8:A14, 9:A15, 10:A16, |
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| 14 | | 11:A17, 12:A18, 13:A19, 14:A20, 15:A21, 16:A22, 17:A23, 18:VMA, |
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| 15 | | 27:X0E, 28:X1E, |
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| 16 | || OUTPUT |
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| 17 | | 19:CS1, 20:CS2, 22:CS3, 23:CX0, 24:CX1, 25:IO0, 26:IO1 |
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| 18 | | |
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| 19 | | ACTIVE-LOW: CS1, CS2, CS3, CX0, CX1, IO0, IO1 |
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| 20 | | |
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| 21 | | |
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| 22 | | SIGNATURE: "0052 " |
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| 23 | | |
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| 24 | || -------------------------------------------------------- |
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| 25 | || /IO0 -> BANCO 0 - AREA 00FC00 - 00FCFF |
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| 26 | || /IO1 -> BANCO 0 - AREA 00FD00 - 00FDFF |
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| 27 | || /CX0 -> BANCO 1 - AREA 010000 - 011FFF SE X0E = 1 (8K) |
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| 28 | || /CX1 -> BANCO 1 - AREA 012000 - 013FFF SE X1E = 1 (8K) |
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| 29 | || /CS1 -> BANCO 2 & 3 - AREA 020000 - 03FFFF (128K) |
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| 30 | || /CS2 -> BANCO 4 & 5 - AREA 040000 - 05FFFF (128K) |
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| 31 | || /CS3 -> BANCO 6 & 7 - AREA 060000 - 07FFFF (128K) |
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| 32 | || |
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| 33 | || -------------------------------------------------------- |
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| 34 | || |
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| 35 | | BANK0 = (A23' & A22' & A21' & A20' & A19' & A18' & A17' & A16' & VMA') |
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| 36 | | BANK1 = (A23' & A22' & A21' & A20' & A19' & A18' & A17' & A16 & VMA') |
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| 37 | || -------------------------------------------------------- |
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| 38 | || |
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| 39 | || IOS -> 00FC00 - 00FDFF |
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| 40 | | IOS = (BANK0 & A15 & A14 & A13 & A12 & A11 & A10 & A9') |
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| 41 | || /IO0 -> AREA 00FC00 - 00FCFF |
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| 42 | | IO0 = (IOS & A8') |
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| 43 | || /IO1 -> AREA 00FD00 - 00FDFF |
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| 44 | | IO1 = (IOS & A8) |
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| 45 | || |
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| 46 | || -------------------------------------------------------- |
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| 47 | || |
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| 48 | || /CS1 -> BANCO 2 & 3 - AREA 020000 - 03FFFF (128K) |
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| 49 | | CS1 = (A23' & A22' & A21' & A20' & A19' & A18' & A17 & VMA') |
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| 50 | || /CS2 -> BANCO 4 & 5 - AREA 040000 - 05FFFF (128K) |
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| 51 | | CS2 = (A23' & A22' & A21' & A20' & A19' & A18 & A17' & VMA') |
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| 52 | || /CS3 -> BANCO 6 & 7 - AREA 060000 - 07FFFF (128K) |
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| 53 | | CS3 = (A23' & A22' & A21' & A20' & A19' & A18 & A17 & VMA') |
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| 54 | || |
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| 55 | || -------------------------------------------------------- |
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| 56 | || |
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| 57 | || /CX0 -> BANCO 1 - AREA 010000 - 011FFF SE X0E = 1 (8K) |
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| 58 | | CX0 = (BANK1 & X0E & A15' & A14' & A13') |
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| 59 | || /CX1 -> BANCO 1 - AREA 012000 - 013FFF SE X1E = 1 (8K) |
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| 60 | | CX1 = (BANK1 & X1E & A15' & A14' & A13) |