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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1 | - | 1 | || FILE: #0005.PLD |
| 2 | || PROJ: 20120602 |
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| 3 | || PART: G26CV12-#0005 |
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| 4 | || |
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| 5 | || DEV : GAL26CV12 |
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| 6 | || |
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| 7 | || DESC: DECODER MEMORIA |
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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:A7, 2:A8, 3:A9, 4:A10, 5:A11, 6:A12, 8:A13, 9:A14, 10:A15, |
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| 14 | | 11:RES, 12:XE0, 13:XE1, 14:XE2, 28:CLB, |
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| 15 | || OUTPUT |
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| 16 | | 15:IO0, 16:IO1, 17:DHS, 18:SYS, 19:ML, 20:MH, 22:PBE, 23:DB0, |
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| 17 | | 24:PB0, 25:CX0, 26:CX1, 27:CX2 |
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| 18 | | |
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| 19 | | ACTIVE-LOW: CX0, CX1, CX2, IO0, IO1 |
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| 20 | | |
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| 21 | | |
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| 22 | | SIGNATURE: "0005 " |
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| 23 | | |
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| 24 | || |
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| 25 | | BLK0 = (RES & A15' & A14' & A13') |
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| 26 | | BLK1 = (RES & A15' & A14' & A13) |
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| 27 | | BLK2 = (RES & A15' & A14 & A13') |
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| 28 | | BLK3 = (RES & A15' & A14 & A13) |
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| 29 | | CX0 = (BLK1 & XE0 & CLB') |
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| 30 | | CX1 = (BLK2 & XE1 & CLB') |
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| 31 | | CX2 = (BLK3 & XE2 & CLB') |
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| 32 | || RAM DBR LOW |
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| 33 | | BLK1A = ((BLK1 & XE0') # (BLK1 & CLB)) |
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| 34 | | BLK2A = ((BLK2 & XE1') # (BLK2 & CLB)) |
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| 35 | | BLK3A = ((BLK3 & XE2') # (BLK3 & CLB)) |
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| 36 | | ML = (BLK0 # BLK1A # BLK2A # BLK3A) |
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| 37 | || |
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| 38 | || BLK4 => 8000 - BFFF 16K |
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| 39 | | B4 = (A15 & A14') |
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| 40 | || BLK5 => C000 - DFFF 8K |
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| 41 | | B5 = (A15 & A14 & A13') |
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| 42 | || BLK6 => E000 - EFFF 4K |
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| 43 | | B6 = (A15 & A14 & A13 & A12') |
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| 44 | || BLK7 => F000 - F7FF 2K |
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| 45 | | B7 = (A15 & A14 & A13 & A12 & A11') |
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| 46 | || BLK8 => F800 - FBFF 1K |
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| 47 | | B8 = (A15 & A14 & A13 & A12 & A11 & A10') |
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| 48 | || BLK9 => FC00 - FDFF 512B |
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| 49 | | B9 = (A15 & A14 & A13 & A12 & A11 & A10 & A9') |
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| 50 | || BLK91 => FD00 - FDFF 256 B |
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| 51 | | B91 = (A15 & A14 & A13 & A12 & A11 & A10 & A9' & A8) |
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| 52 | || BLK10 => FE00 - FEFF 256B (I/O 1) |
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| 53 | | B10 = (A15 & A14 & A13 & A12 & A11 & A10 & A9 & A8') |
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| 54 | || BLK11 => FF00 - FF7F 128B (I/O 0) |
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| 55 | | B11 = (A15 & A14 & A13 & A12 & A11 & A10 & A9 & A8 & A7') |
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| 56 | || BLK12 => FF80 - FFFF 128B (SYSTEM PBR) |
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| 57 | | B12 = (A15 & A14 & A13 & A12 & A11 & A10 & A9 & A8 & A7) |
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| 58 | || |
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| 59 | | IO0 = (RES & B11) |
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| 60 | | IO1 = (RES & B10) |
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| 61 | || |
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| 62 | | MH = ((B4 # B5 # B6 # B7 # B8 # B9) & RES) |
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| 63 | || |
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| 64 | | PBE = ((B4 # B5 # B6 # B7 # B8 # B9 # B12) & RES) |
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| 65 | || |
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| 66 | || SELEZIONE DBR HIGH |
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| 67 | | X0 = (A15) |
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| 68 | | X1 = (A15' & A14) |
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| 69 | | X2 = (A15' & A14' & A13) |
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| 70 | | X3 = (A15' & A14' & A13' & A12) |
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| 71 | | X4 = (A15' & A14' & A13' & A12' & A11) |
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| 72 | | DHS = (X0 # X1 # X2 # X3 # X4) |
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| 73 | || |
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| 74 | || PAGINE COMUNI IN BANCO 0 |
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| 75 | || P00 => 0080 - 00FF |
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| 76 | | P00 = (A15' & A14' & A13' & A12' & A11' & A10' & A9' & A8' & A7) |
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| 77 | || P01 => 0100 - 01FF |
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| 78 | | P01 = (A15' & A14' & A13' & A12' & A11' & A10' & A9' & A8) |
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| 79 | || P02 => 0200 - 02FF |
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| 80 | | P02 = (A15' & A14' & A13' & A12' & A11' & A10' & A9 & A8') |
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| 81 | || P03 => 0300 - 03FF |
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| 82 | | P03 = (A15' & A14' & A13' & A12' & A11' & A10' & A9 & A8) |
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| 83 | || P04 => 0400 - 03FF |
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| 84 | | P04 = (A15' & A14' & A13' & A12' & A11' & A10 & A9' & A8') |
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| 85 | || P05 => 0500 - 05FF |
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| 86 | | P05 = (A15' & A14' & A13' & A12' & A11' & A10 & A9' & A8) |
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| 87 | | CMR = (P00 # P01 # P02 # P03 # P04 # P05) |
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| 88 | || |
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| 89 | || FORZATURA DBR IN BANCO 0 |
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| 90 | | DB0 = (CMR # CLB) |
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| 91 | || |
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| 92 | || FORZATURA PBR IN BANCO 0 |
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| 93 | | PB0 = (B91 # B12 # CLB) |
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| 94 | | SYS = ((B91 # B12) & RES) |