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Additional Pictures 

 

Close-up view of the TMC0501 Rev. E Arithmetic Chip used with the SR-50 and other calculators.
PMOS Technology, 28-pin DIP 4-bit serial Register Processor, 5*16*4 Bits Data SAM.

Die Photo of the TMC0500E/501E courtesy of Sean Riddle.

Close-up view of the TMC0501E (ES) Arithmetic Chip used with the SR-51-II and other calculators.
PMOS Technology, 28-pin SPDIP 4-bit serial Register Processor, 5*16*4 Bits Data SAM.

Die Photo of the TMC0500E/501E (ES) courtesy of Sean Riddle.


If you have additions to the above article please email: joerg@datamath.org.

Joerg Woerner, May 2, 2021. No reprints without written permission.