DATAMATH CALCULATOR MUSEUM
Texas Instruments Spelling B
|Date of introduction:||1980||Display technology:||Fluorescent|
|New price:||$30.00||Display size:||8 alphanumeric|
|Size:||6.1" x 3.4" x 1.1"|
|Weight:||5.5 ounces||Serial No:|
|Batteries:||9V||Date of manufacture:||wk 13 year 1980|
|AC-Adapter:||Origin of manufacture:||USA (ATA)|
|Precision:||Integrated circuits:||TMC0274, TMC0355 (CD2602)|
|Program steps:||Courtesy of:||Joerg Woerner|
(EU: 6.6 MByte)
(EU: 3.9 MByte)
About two years after the introduction of the original Spelling B appeared this slightly enhanced version. At first glance you"ll notice the note symbol printed on the display bezel as a short hint to the added buzzer.
the 2nd generation of the Spelling B reveals a big surprise! The
original design based on two
TMS1000 series microcontrollers was replaced with a TMC0274 microcontroller
TMC0355, known as " 128kBit Speech-ROM" of the Speak & Spell
Please notice the two red wires on the left of the pictured printed circuit board (PCB), the small piezo buzzer is connected to them.
An identical product was sold in United Kingdom with the Spelling ABC, while the Spelling ABC introduced in Germany makes use of another language ROM.
All models were later replaced with a product using a LC-display. View it here.
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© Joerg Woerner, June 6, 2008. No reprints without written permission.