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 | |
Memories: | |||
Program steps: | Courtesy of: | Joerg Woerner | |
Download manuals: |
(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: joerg@datamath.org.
© Joerg Woerner, December 25, 2001. No reprints without written permission.