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|| FILE: #0052.PLD|| PROJ: 20120500|| PART: G26CV12-#0052|||| DEV : GAL26CV12|||| DESC: DECODER I/O||||GAL26CV12||| INPUT| 1:A4, 2:A5, 3:A6, 4:A7, 5:A8, 6:A9, 8:A10, 9:A11, 10:A12,| 11:A13, 12:A14, 13:A15, 14:A16, 15:A17, 16:A18, 17:A19, 18:A20,| 25:A21, 26:A22, 27:A23, 28:VMA,|| OUTPUT| 19:IO2, 20:DBE, 22:IO1, 23:IO0, 24:NC|| ACTIVE-LOW: IO0, IO1, IO2||| SIGNATURE: "0052 "||| --------------------------------------------------------|| /IO0 -> BANCO 0 - AREA 00FC10 - 00FCFF|| /IO1 -> BANCO 0 - AREA 00FD00 - 00FDFF|| /IO2 -> BANCO 0 - AREA 00FC00 - 00FC0F|| /DBE -> ABILITAZIONE BUFFER DATI BUS - SEMPRE ATTIVO ECCETTO IO2|| --------------------------------------------------------||| BANK0 = (A23' & A22' & A21' & A20' & A19' & A18' & A17' & A16' & VMA')|| --------------------------------------------------------|||| IOS -> 00FC00 - 00FDFF|| AREA I/O VALIDA SOLO SE VDA = 1| IOS = (BANK0 & A15 & A14 & A13 & A12 & A11 & A10 & A9')|| /IO1 -> AREA 00FD00 - 00FDFF| IO1 = (IOS & A8)|| /IO2 -> AREA 00FC00 - 00FC0F| IOLL = (IOS & A8')| IO2X = (IOLL & A7' & A6' & A5' & A4')| IO2 = IO2X|| /IO0 -> AREA 00FC10 - 00FCFF| IOX0 = (IOLL & A7)| IOX1 = (IOLL & A7' & A6)| IOX2 = (IOLL & A7' & A6' & A5)| IOX3 = (IOLL & A7' & A6' & A5' & A4)| IO0 = (IOX0 # IOX1 # IOX2 # IOX3)|| --------------------------------------------------------|||| /DBE -> TUTTI GLI INDIRIZZI ESCLUSO IO2| DBE = IO2X| NC = IO2X