DATAMATH CALCULATOR MUSEUM
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:||wk 25 year 1980|
|AC-Adapter:||Origin of manufacture:||Italy|
|Precision:||Integrated circuits:||TMC0273, TMC0355 (CD2601)|
|Program steps:||Courtesy of:||Joerg Woerner|
This LETTERlogic sold in the United Kingdom is an interesting combination:
• The design is borrowed from the German
• The keyplate and the electronic inside are borrowed from the original Mr. Challenger
The printed circuit boards (PCBs) of the three versions are almost identical and share the TMC0273 microcontroller and a TMC0355 Voice Synthesis Memory (VSM), known as "128kBit Speech-ROM" of the Speak & Spell family. The different languages of the three games are coded in these ROMs:
|• CD2601: Mr. Challenger, LETTERlogic (UK)
• CD2603: LETTERlogic (France)
• CD2604: LETTERlogic (Germany)
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© Joerg Woerner, May 6, 2007. No reprints without written permission.