||	FILE:	#0052XX.PLD
||	PROJ:	20180701
||		C16 - NEW GAL FOR CPU 65C816 BOARD
||
||	PART:	G26CV12-#0052
||
||	DEV :	GAL26CV12
||
|| 	DESC:	DECODER I/O
||
|
|GAL26CV12
|
|| INPUT
|  1:A8, 2:A9, 3:A10, 4:A11, 5:A12, 6:A13, 8:A14, 9:A15, 10:A16, 
| 11:A17, 12:A18, 13:A19, 14:A20, 15:A21, 16:A22, 17:A23, 18:VMA,
| 27:X0E, 28:-,
|| OUTPUT 
|  19:CX2, 20:CS2, 22:CS3, 23:CX0, 24:CX1, 25:IO0, 26:IO1
|
| ACTIVE-LOW: CX2, CS2, CS3, CX0, CX1, IO0, IO1
|
|
| SIGNATURE: "0052XX  "
|
|| --------------------------------------------------------
|| /IO0 -> 00FC00 - 00FCFF
|| /IO1 -> 00FD00 - 00FDFF
|| /CX0 -> 010000 - 011FFF (8K)
|| /CX1 -> 012000 - 013FFF (8K)
|| /CX2 -> E00000 - EFFFFF (1M) if X0E = 1
|| /CS2 -> NOT USED
|| /CS3 -> NOT USED
|| /CS1 renamed to /CX2
|| X1E signal NOT USED (IGNORED)
|| X0E enable RAM in DMA board => || Blocks E00000 - E7FFFF & E80000 - EFFFFF
|
|| --------------------------------------------------------
||
|  BANK0 = (A23' & A22' & A21' & A20' & A19' & A18' & A17' & A16' & VMA')
|  BANK1 = (A23' & A22' & A21' & A20' & A19' & A18' & A17' & A16  & VMA')
|| --------------------------------------------------------
||
|| IOS -> 00FC00 - 00FDFF 
|  IOS = (BANK0 & A15 & A14 & A13 & A12 & A11 & A10 & A9')
|| /IO0 -> 00FC00 - 00FCFF
|  IO0 = (IOS & A8')
|| /IO1 -> 00FD00 - 00FDFF
|  IO1 = (IOS & A8)
||
|| --------------------------------------------------------
||
|| /CX0 -> 010000 - 011FFF (8K)
|  CX0 = (BANK1 & A15' & A14' & A13')
|| /CX1 -> 012000 - 013FFF (8K)
|  CX1 = (BANK1 & A15' & A14' & A13)
||
|| /CX2 -> Blocks E00000 - E7FFFF & E80000 - EFFFFF if X0E = 1
|  BE = VMA' & A23  & A22  & A21  & A20'
|  CX2 = BE & X0E
|  CS2 = BE & X0E
|  CS3 = BE & X0E