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|| FILE: #0203.PLD|| PROJ: 20120601|| PART: G26CV12-#0203|||| DEV : GAL26CV12|||| DESC: MASTER DECODER - NEW BUS BOARD||||GAL26CV12||| INPUT| 1:A9, 2:A10, 3:A11, 4:A12, 5:A13, 6:A14, 8:A15, 9:A16, 10:A17,| 11:A18, 12:A19, 13:A20, 14:A21, 15:A22, 16:A23, 17:VMA, 18:HIM,| 25:SW0, 26:SW1, 27:S0, S1:FWE,|| OUTPUT| 19:CEE, 20:CS0, 22:CSR, 23:CSF, 24:CSE|| ACTIVE-LOW: CEE, CS0, CSR, CSF, CSE||| SIGNATURE: "00203 "||| MAP|| CS0 - RAM BANK $00|| CSR - RAM BANK $F0|| CSF - FLASH BANK $F0|| CSE - EEROM BANK $F0|| CEE - EMU8U BANK $F0|||| MAP $00FE00 - $00FFFF IF HIM = 0|| --------------------------------------|| SW0 SW1 TYPE SIGNAL|| 0 X FLASH CSF|| 1 0 EEROM CSE|| 1 1 EMU8U CEE|||| MAP $00FE00 - $00FFFF IF HIM = 1|| --------------------------------------|| SW0 SW1 TYPE SIGNAL|| X X RAM BANK $00 CS0|||| MAP BANK $F0 : $F00000 - $F0FFFF|| --------------------------------------|| S1 S0 TYPE SIGNAL|| 0 0 RAM bank $F0 CSR|| 0 1 FLASH CSF|| 1 0 EEROM CSE|| 1 1 EMU8U CEE|||| --------------------------------------------------------|||| BANK $00 : $000000 - $00FFFF| BANK0 = (A23' & A22' & A21' & A20' & A19' & A18' & A17' & A16' & VMA')|||| 32K BLOCK| RB0 = (BANK0 & A15' )|| 16K BLOCK| RB1 = (BANK0 & A15 & A14' )|| 8K BLOCK| RB2 = (BANK0 & A15 & A14 & A13' )|| 4K BLOCK| RB3 = (BANK0 & A15 & A14 & A13 & A12' )|| 2K BLOCK| RB4 = (BANK0 & A15 & A14 & A13 & A12 & A11' )|| 1K BLOCK| RB5 = (BANK0 & A15 & A14 & A13 & A12 & A11 & A10')|| 512 BYTES BLOCK $00FC00 - $00FDFF RESERVED FOR I/O|| RB6 = (BANK0 & A15 & A14 & A13 & A12 & A11 & A10 & A9')|||| LAST 512 BYTES BLOCK ($00FE00 - $00FFFF) ONLY IF HIM=1| RB7 = (BANK0 & A15 & A14 & A13 & A12 & A11 & A10 & A9 & HIM)|||| BANK $00 RAM SELECT| CS0A = (RB0 # RB1 # RB2 # RB3 # RB4 # RB5 # RB7)|||| BANK $01 : $010000 - $01FFFF| BANK1 = (A23' & A22' & A21' & A20' & A19' & A18' & A17' & A16 & VMA')|||| 16K BLOCK $010000 - $013FFF RESERVED FOR EXTERNAL RAM|| BR0 = (BANK1 & A15' & A14')|| 16K BLOCK $014000 - $017FFF| BR1 = (BANK1 & A15' & A14)|| 32K BLOCK $018000 - $01FFFF| BR2 = (BANK1 & A15)|||| BANK $01 RAM SELECT| CS0B = (BR1 # BR2 # BR3)|||| BANK $02 & $03 : $020000 - $03FFFF (128K BLOK)| CS0C = (A23' & A22' & A21' & A20' & A19' & A18' & A17 & VMA')|||| BANK $03 - $07 : $040000 - $07FFFF (256K BLOK)| CS0D = (A23' & A22' & A21' & A20' & A19' & A18 & VMA')|||| BANK $00 - $07 RAM SELECTION (512K BLOCK)| CSR = (CS0A # CS0B # CS0C # CS0D)|||| --------------------------------------------------------|||| BANKF0: $F00000 - $F7FFFF| BANKF0 = (A23 & A22 & A21 & A20 & A19' & VMA')|||| LAST 512 BYTES BLOCK ON BANK $00 ($00FE00 - $00FFFF) ONLY IF HIM=0| BR7 = (BANK0 & A15 & A14 & A13 & A12 & A11 & A10 & A9 & HIM')|| BR7 MAPPED TO FLASH IF SW0=0| BR7F = BR7 & SW0'|| BR7 MAPPED TO EEROM IF SW0=1 & SW1=1| BR7E = BR7 & SW0 & SW1|| BR7 MAPPED TO EMU8U IF SW0=1 & SW1=0| BR7U = BR7 & SW0 & SW1'|| BANK $F0 MAPPED TO FLASH IF S0=1 & S1=0| BF0F = BANKF0 & S0 & S1'|| BANK $F0 MAPPED TO EEROM IF S0=0 & S1=1| BF0E = BANKF0 & S0' & S1|| BANK $F0 MAPPED TO EMU8U IF S0=1 & S1=1| BF0U = BANKF0 & S0 & S1|| BANK $F0 MAPPED TO RAM IF S0=0 & S1=0| BF0R = BANKF0 & S0' & S1'|| CSR = BF0R| CSF = (BF0F # BR7F)| CSE = (BF0E # BR7E)| CEE = (BF0U # BR7U)