DATAMATH CALCULATOR MUSEUM
Texas Instruments Speak & Math (Type 2)
|Date of introduction:||1986||Display technology:||Fluorescent|
|New price:||Display size:||9 alphanumeric|
|Size:||10" x 7" x 1.3"|
|Weight:||17 ounces||Serial No:|
|Batteries:||4*C cells||Date of manufacture:||wk 03 year 1986|
|AC-Adapter:||AC9199||Origin of manufacture:||USA|
|Precision:||Integrated circuits:||TMC0270/CD2708, CD2801, CD2381, CD2614|
|Program steps:||Courtesy of:||Joerg Woerner|
(US: 3.0M Bytes)
(US: 2.9M Bytes)
This Speak & Math model from the year 1986 sports a slightly changed keyboard design. View the original Speak & Math here.
Other products in the Speak & line cover spelling and reading words. Compare this Speak & Math with both Speak & Spell and Speak & Read. A compact version without display was sold in France (le Calcul magique) and Germany (Mathe-Fix).
Don't miss the appearance of the Speak & Spell in the movie „E.T. - The Extra-Terrestrial“. Do you know Qubais Reed Ghazala? Get more tunes from your Speak & Math with circuit-bending.
Dismantling this Speak & Read manufactured in October 1980 by Texas Instruments in the United States reveals a design centered around four Integrated Circuits:
TMC0270/CD2708: 4-bit microcontroller with 2k*9 Bits ROM and 9*64 Bits RAM
• TMC0280/CD2801: TMS5100 VSP (Voice Synthesis Processor)
• TMC0350/CD2381, TMC0355/CD2614: TMS6100, TMS6125 VSM (Voice Synthesis Memory) with 128k Bits and 32k Bits
The Speech-ROMs of the Speak & Math vary depending on the production date. Starting in 1981 the overall capacity was significantly reduced, differences in the word list and voice tunes are not known:
• 1980: TMC0350/CD2392 + TMC0350/CD2393 for a combined 256k Bits
• 1981: TMC0350/CD2381 + TMC0355/CD2614 for a combined 160k Bits
An inside view of some dismantled Speak & Spell products could be found here.
Later the Super Speak & Math was introduced with a multiline LC-display.
If you have additions to the above article please email: email@example.com.
© Joerg Woerner, December 25, 2001. No reprints without written permission.