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Additional Pictures 

 

Close-up view of the MK5011 single-chip calculator circuit used with the Unitrex 1200 (Type 37, Rev. 4C) manufactured in February 1973.
PMOS Technology, 40-pin Ceramic DIP 1-bit serial Register Processor, Hard-wired Instructions, 2*48 Bits + 12 Bit Data SAM. Chip manufactured December 1972.



Die Photo of the MK6010 courtesy of Sean Riddle.

Close-up view of the MK5011 single-chip calculator circuit used with the Unitrex 1200 (Type 37, Rev. 4C) manufactured in May 1973.
PMOS Technology, 40-pin Ceramic DIP 1-bit serial Register Processor, Hard-wired Instructions, 2*48 Bits + 12 Bit Data SAM. Chip manufactured December 1972.




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© Joerg Woerner, March 8, 2026. No reprints without written permission.