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Additional Pictures 

 

Close-up view of the µPD278 single-chip calculator circuit used with the Olympia CD44S.
PMOS Technology, 28-pin DIP 4-bit serial Register Processor, 512*17 Bits Instruction ROM, 5*52 Bits Data SAM. Manufactured January 1976.




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© Joerg Woerner, March 8, 2025. No reprints without written permission.