Additional Pictures 


Close-up view of the TMC0923 single-chip calculator circuit used with the TI-1025.
PMOS Technology, 28-pin SPDIP 4-bit serial Register Processor, 512*9 Bits Instruction ROM, 5*10*4 Bits Data SAM.

Die Photo of the TMC0920/TMC0923 courtesy of Sean Riddle.

If you have additions to the above article please email:

Joerg Woerner, April 10, 2021. No reprints without written permission.