TP-0320


The TP-0320 is an LCD-drive version of the TMS-1000. It was used in the TI Business Analyst-II, the Sharp EL-503, and several other calculators.


TI Business Analyst-II

Texas Instruments financial calculator.

Hardware description and pinout

full die shot top metal

full die shot after acid

ROM array top metal

ROM array after acid

raw ROM dump


Sharp EL-503

Sharp calculator.

Hardware description and pinout

The chip is mounted upside down; the pins were bent the opposite way and the bottom was labeled instead of the top.

full die shot top metal

full die shot after acid

ROM array top metal

ROM array after acid

PLA after acid

another PLA after acid

raw ROM dump


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