Texas Instruments LETTERlogic

Date of introduction:  1980 Display technology:  Fluorescent
New price:   Display size:  8 alphanumeric
Size:  6.2" x 3.4" x 1.1"
 157 x 86 x 29 mm3
Weight:  5.7 ounces, 163 grams Serial No:  
Batteries:  9V  Date of manufacture:  year 1980
AC-Adapter:   Origin of manufacture:  Italy
Precision:   Integrated circuits:  TMC0273, TMC0355 (CD2603)
Program steps:   Courtesy of:  Joerg Woerner

This LETTERlogic sold in the France is almost identical with its German and British sibblings LETTERlogic and LETTERlogic but sports a different imprint on the keyplate.

The printed circuit boards (PCB's) of the three versions are almost identical and share the TMC0273 microcontroller and the TMC0355 128kBit ROM with the Speech data. The different language of the three games is coded in these ROM's:

CD2601: Mr. Challenger, LETTERlogic (UK)
CD2603: LETTERlogic (France)
CD2604: LETTERlogic (Germany)

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If you have additions to the above article please email:

Joerg Woerner, August 1, 2012. No reprints without written permission.