Texas Instruments Dotto Conta-Parla

Date of introduction:   Display technology:  
New price:   Display size:  n.a.
Size:  4.3" x 6.9" x  1.25" 
 108 x 176 x 32 mm3
Weight:  7.7 ounces, 219 grams Serial No:  
Batteries:  4*AA cells Date of manufacture:  wk 11 year 1986
AC-Adapter:   Origin of manufacture:  Italy
Precision:   Integrated circuits:  TMS50C40 (CM54122)
Program steps:   Courtesy of:  Joerg Woerner

Nothing else than a Maths marvel trimmed to Italian language. 

A slightly simpler model was sold in Germany with the Mathe-Fix.

Dismantling the Dotto Conta-Parla manufactured in March 1986 by Texas Instruments in their Rieti, Italy facility reveals a small surprise: The printed circuit board (PCB) of the educational toy is centered around a TMS50C40 standard Voice Synthesis Processor (VSP) chip. We know this technology already from the Little Maestro and its siblings Speak & Music, La Musique Magique and Fonillo Suonaparla introduced in 1986, too.

The single-sided PCB is of the Dotto Conta-Parlo is labeled "MINI-MATH", obviously a reference to the original Speak & Math introduced by Texas Instruments already in 1980 and not related to the Minimath calculator developed in 1971.

The compact design of the PCB is centered around just one Integrated Circuits

TMS50C40/CM54122: TSP50C50 VSP (Voice Synthesis Processor) with 8-bit microcontroller and 8k Bytes Mask ROM for both program and voice and 32 Bytes RAM

The Dotto Conta-Parla was distributed in the 80s like some other Texas Instruments products by Clementoni

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If you have additions to the above article please email:

Joerg Woerner, March 15, 2004. No reprints without written permission.