SX 64 CPU Board

Commodore SX 64 CPU Board

  • only two versions known (to me) 251102 Rev A and 251102 Rev 1, I can’t see any differences.
  • contains the CPU, memory, VIC, SID and Rom’s of the SX.

Integrated Circuits

PCB Identifier Chip NumberRemarks Memory Location/bit
UA374LS257Do not use TI or NS
UA44164DRAMD7
UA54164DRAMD5
UA64164DRAMD3
UA74164DRAMD1
UB174LS258
UB274LS373
UB374LS257Do not use TI or NS
UB44164DRAMD6
UB54164DRAMD4
UB64164DRAMD2
UB74164DRAMD0
UC174LS139
UD12332Character ROM$D000-$DFFF
UD32364Kernal ROM$E000-$FFFF
UD42364Basic ROM$A000-$BFFF
UD76510
CPU
UE36581
SID$D400-$D7FF
UE482S100 / 906114-01
906114-01 PLA
UE72114RAM 300NS
UF46567VIC$D000-$D3FF
UF67408
UF77406
UG64066
UG7555Timer

Schematics

Commodore SX 64 CPU 251103 Left

Commodore SX 64 CPU 251103 Left

Commodore SX 64 CPU 251103 Right

Commodore SX 64 CPU 251103 Right


Board Image

Commodore SX64 CPU Board 251102 REV 1

Commodore SX64 CPU Board 251102 REV 1

Commodore SX64 CPU Board 251102 REV A

Commodore SX64 CPU Board 251102 REV A

 

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