Additional Pictures 


Close-up view of the TP0322 single-chip calculator circuit used with the TI Business Analyst II.
CMOS Technology, 28-pin DIP 4-bit Microcontroller, 2,048*9 Bits Instruction ROM, 192*4 Bits Data RAM, 64 Bits Display Register.

Die Photo (after acid) of the TP0320/TP0322 courtesy of Sean Riddle.

If you have additions to the above article please email:

Joerg Woerner, January 11, 2021. No reprints without written permission.