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

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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