TMS-1990

The TMS-1990 is a reduced-size version of the TMS-1000. It was used in the TI-1000 calculator and the 1978 Little Professor educational calculator.

Little Professor (1978)

Texas Instruments educational calculator.

Hardware description and pinout

full die shot top metal

full die shot after acid

ROM array after acid

raw ROM dump

ROM dump in TMS1000 order

TI-1000

Texas Instruments basic calculator.

Hardware description and pinout

full die shot after acid

ROM array after acid

raw ROM dump

ROM dump in TMS1000 order