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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1 | - | 1 | || FILE: #0053X.PLD |
| 2 | || PROJ: 20120601 |
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| 3 | || PART: G26CV12-#0053 |
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| 4 | || |
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| 5 | || DEV : GAL26CV12 |
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| 6 | || |
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| 7 | || DESC: MASTER DECODER - NEW BUS BOARD |
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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:A9, 2:A10, 3:A11, 4:A12, 5:A13, 6:A14, 8:A15, 9:A16, 10:A17, |
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| 14 | | 11:A18, 12:A19, 13:A20, 14:A21, 15:A22, 16:A23, 17:VMA, 18:RW, |
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| 15 | | 24:HIM, 25:X0E, 26:X1E, 27:XFE, 28:FWE, |
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| 16 | || OUTPUT |
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| 17 | | 19:FE, 20:CS0, 22:ME, 23:CSF |
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| 18 | | |
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| 19 | | ACTIVE-LOW: FE, ME, CSF |
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| 20 | | |
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| 21 | | |
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| 22 | | SIGNATURE: "0053X " |
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| 23 | | |
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| 24 | || NEW VERSION |
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| 25 | | |
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| 26 | || -------------------------------------------------------- |
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| 27 | || HIM -> MAPPA AREA 00FE00 - 00FFFF IN RAM INVECE CHE IN FLASH |
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| 28 | || X0E -> ABILITA EXTERN MEMORY (/CX0) IN BANCO 1 AREA 010000 - 011FFF (8K) |
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| 29 | || X1E -> ABILITA EXTERN MEMORY (/CX1) IN BANCO 1 AREA 012000 - 013FFF (8K) |
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| 30 | || XFE -> ABILITA FLASH MEMORY BANCHI F0/F7 AREA F00000 - F7FFFF |
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| 31 | || FWE -> ABILITA WRITE FLASH MEMORY |
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| 32 | || -------------------------------------------------------- |
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| 33 | || |
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| 34 | || /FE -> ABILITA FLASH MEMORY F00000 - F7FFFF (512K) |
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| 35 | || /ME -> ABILITA BANCHI RAM DA 4MB (ESCLUSO CSX, BK0) |
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| 36 | || BLOCCO F80000 - FFFFFF ABILITATO SE: |
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| 37 | || HIM = 1 AND XFE = 1 AND RW = 0 |
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| 38 | || HIM = 0 AND RW = 1 |
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| 39 | || /CS0 -> PRIMO BLOCCO 128K IN 00000 - 01FFFF (ESCLUSO IO) |
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| 40 | || /CSF -> BLOCCO FLASH IN F80000 - FFFFFF (512K) |
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| 41 | || READ ONLY IF HIM = 1 AND XFE = 1 |
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| 42 | || MAPPA 00FE00 - 00FFFF IN F8FE00 - F8FFFF SE HIM=0 E RW=1 |
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| 43 | |||
| 44 | || -------------------------------------------------------- |
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| 45 | || FIRST 128K |
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| 46 | || |
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| 47 | | BANK0 = (A23' & A22' & A21' & A20' & A19' & A18' & A17' & A16' & VMA') |
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| 48 | | BANK1 = (A23' & A22' & A21' & A20' & A19' & A18' & A17' & A16 & VMA') |
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| 49 | || -------------------------------------------------------- |
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| 50 | || |
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| 51 | || B0M -> ABILITAZIONE RAM RANGE 000000 - 00FFFF (BANCO 0) |
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| 52 | || |
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| 53 | || BLOCCO 32K |
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| 54 | | RB0 = (BANK0 & A15' ) |
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| 55 | || BLOCCO 16K |
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| 56 | | RB1 = (BANK0 & A15 & A14' ) |
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| 57 | || BLOCCO 8K |
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| 58 | | RB2 = (BANK0 & A15 & A14 & A13' ) |
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| 59 | || BLOCCO 4K |
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| 60 | | RB3 = (BANK0 & A15 & A14 & A13 & A12' ) |
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| 61 | || BLOCCO 2K |
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| 62 | | RB4 = (BANK0 & A15 & A14 & A13 & A12 & A11' ) |
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| 63 | || BLOCCO 1K |
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| 64 | | RB5 = (BANK0 & A15 & A14 & A13 & A12 & A11 & A10') |
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| 65 | || ULTIMO BLOCCO 512B (00FE00 - 00FFFF) |
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| 66 | | RB7 = (BANK0 & A15 & A14 & A13 & A12 & A11 & A10 & A9) |
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| 67 | || RB7A -> RANGE 00FE00 - 00FFFF IN RAM SOLO SE HIM=1 |
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| 68 | | RB7A = (RB7 & HIM) |
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| 69 | || RB7B -> RANGE 00FE00 - 00FFFF IN RAM SOLO SE RW=0 |
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| 70 | | RB7B = (RB7 & RW') |
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| 71 | || |
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| 72 | | B0M = (RB0 # RB1 # RB2 # RB3 # RB4 # RB5 # RB7A # RB7B) |
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| 73 | || -------------------------------------------------------- |
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| 74 | || |
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| 75 | || B1M -> ABILITAZIONE RAM RANGE 010000 - 01FFFF (BANCO 1) |
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| 76 | || |
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| 77 | || B32KH -> BLOCCO 32KB 018000 - 01FFFF |
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| 78 | | B32KH = (BANK1 & A15) |
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| 79 | || B16KH -> BLOCCO 16KB 014000 - 017FFF |
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| 80 | | B16KH = (BANK1 & A15' & A14) |
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| 81 | || B08KL -> BLOCCO 8KB 010000 - 011FFF |
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| 82 | | B08KL = (BANK1 & A15' & A14' & A13' & X0E') |
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| 83 | || B08KH -> BLOCCO 8KB 012000 - 013FFF |
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| 84 | | B08KH = (BANK1 & A15' & A14' & A13 & X1E') |
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| 85 | || |
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| 86 | | B1M = (B32KH # B16KH # B08KL # B08KH) |
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| 87 | || -------------------------------------------------------- |
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| 88 | || |
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| 89 | || CS0 -> ABILITAZIONE RAM RANGE 000000 - 01FFFF (BANCHI 0 & 1) |
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| 90 | | CS0 = (B0M # B1M) |
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| 91 | || -------------------------------------------------------- |
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| 92 | || CS1 -> BANCO 2 & 3 - AREA 020000 - 03FFFF (128K) |
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| 93 | | CS1 = (A23' & A22' & A21' & A20' & A19' & A18' & A17 & VMA') |
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| 94 | || CS2 -> BANCO 4,5,6 & 7 - AREA 040000 - 07FFFF (256K) |
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| 95 | | CS2 = (A23' & A22' & A21' & A20' & A19' & A18 & VMA') |
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| 96 | || -------------------------------------------------------- |
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| 97 | || |
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| 98 | || ABILITAZIONE RAM RANGE 020000 - FFFFFF |
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| 99 | || B4MH -> BLOCCO 4MB 800000 - BFFFFF |
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| 100 | | B4MH = (VMA' & A23 & A22' ) |
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| 101 | || B2MH -> BLOCCO 2MB C00000 - DFFFFF |
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| 102 | | B2MH = (VMA' & A23 & A22 & A21' ) |
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| 103 | || B1MH -> BLOCCO 1MB E00000 - EFFFFF |
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| 104 | | B1MH = (VMA' & A23 & A22 & A21 & A20' ) |
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| 105 | || B5K -> BLOCCO 512KB F00000 - F7FFFF (RAM SOLO SE XFE=0, HIM=1) |
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| 106 | | B5K = (VMA' & A23 & A22 & A21 & A20 & A19' & XFE' & HIM) |
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| 107 | || B6K -> BLOCCO 512KB F80000 - FFFFFF ALWAYS MAPPED |
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| 108 | | B6K = (A23 & A22 & A21 & A20 & A19 & VMA') |
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| 109 | || |
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| 110 | || B4ML -> BLOCCO 4MB 400000 - 7FFFFF |
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| 111 | | B4ML = (VMA' & A23' & A22 ) |
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| 112 | || B2ML -> BLOCCO 2MB 200000 - 3FFFFF |
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| 113 | | B2ML = (VMA' & A23' & A22' & A21 ) |
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| 114 | || B1ML -> BLOCCO 1MB 100000 - 1FFFFF |
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| 115 | | B1ML = (VMA' & A23' & A22' & A21' & A20 ) |
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| 116 | || B5KL -> BLOCCO 512KB 080000 - 0FFFFF |
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| 117 | | B5KL = (VMA' & A23' & A22' & A21' & A20' & A19 ) |
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| 118 | || |
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| 119 | || /ME -> ABILITAZIONE RAM RANGE 000000 - F7FFFF |
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| 120 | | MXH = (B4MH # B2MH # B1MH # B5K # B6K) |
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| 121 | | MXL = (B4ML # B2ML # B1ML # B5KL # CS0 # CS1 # CS2) |
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| 122 | | ME = (MXL # MXH) |
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| 123 | || |
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| 124 | || -------------------------------------------------------- |
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| 125 | || /FE -> ABILITA FLASH RANGE F00000 - F7FFFF |
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| 126 | || |
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| 127 | || FS1R -> MAPPA RANGE 00FE00 - 00FFFF IN FLASH (HIM=0, RW=1) - BOOT |
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| 128 | | FS1R = (RB7 & RW & HIM') |
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| 129 | || FS2 -> ABILITA FLASH RANGE F00000 - F7FFFF (XFE=1, FWE=1) |
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| 130 | | FS2 = (A23 & A22 & A21 & A20 & A19' & VMA' & FWE & XFE) |
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| 131 | | FE = (FS1R # FS2) |
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| 132 | || -------------------------------------------------------- |
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| 133 | || EMULATOR |
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| 134 | || /CSF -> ABILITAZIONE EMULATOR RANGE F80000 - FFFFFF (XFE=1, FWE=0) |
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| 135 | | CSF = (A23 & A22 & A21 & A20 & A19' & VMA' & FWE' & XFE) |