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Additional Pictures 

 

The DCM-50A Platform with the TMC0738NC single-chip calculator circuit from a Canon Pocketronic II manufactured in August 1974.
The Output PLA of the TMC0738NC is programmed for a modified BCD format instead the usual 7-Segment format. Display is showing "-1230.56789".

The DCM-50A Platform with the TMC0738NC single-chip calculator circuit from a Canon Pocketronic II manufactured in August 1974 with an additional "modified BCD to 7-Segment Decoder"
and an Arduino-based debug setup for recording the communication between the TMC0138 single-chip calculator circuit and the TMS0641 Printer Chip.

Close-up view of the TMC0138NC single-chip calculator circuit.




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

Joerg Woerner, April 13, 2024. No reprints without written permission.