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Additional Pictures 

 

Close-up view of the HD36290 single-chip calculator circuit used with the Lloyd's Accumatic 30 (Model EH-9036, Type 255D).
PMOS Technology, 28-pin DIP 1-bit serial Register Processor, 328*17 Bits Instruction ROM, 3*44 Bits Data SAM. Manufactured April 1975.



Die Photo of the HD36290 courtesy of Sean Riddle.


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© Joerg Woerner, November 13, 2024. No reprints without written permission.