Datamath Calculator Museum DCM-50A (TMS0800)

Date of introduction:  September 21, 2022 Display technology:  LED
New price:  $849.95 (2022 = $119.95 in 1972) Display size:  12
Size:  10.5" x 8.5" x 1.5"
 267 x 216 x 38 mm3
Weight:  17.4 ounces, 494 grams Serial No:  0001
Batteries:  4*AA Date of manufacture:  mth 09 year 2022
AC-Adapter:  DC 6V Origin of manufacture:  USA
Precision:   Integrated circuits:  ZIF-Sockets for TMS0800, TMS0830, TMS0850, 3*SN75493, 2*SN75494
Memories:   Displays:  HP 5082-7653
Program steps:   Courtesy of:  Joerg Woerner

The Datamath Calculator Museum DCM-50A (TMS0800) is based on the generic DCM-50A Platform to access all features of calculators based on Texas Instruments’ single-chip calculator circuits and covers designs based on:

TMS0800 Family
TMS0830 Family
TMS0850 Family

With many of the single-chip calculator circuits either designed for Texas Instruments' proprietary applications or developed for OEM manufacturers, available documentation of their features is rather scarce and we are committed to provide as much information as possible to the calculator enthusiasts and we document our observations and findings here.

The Technology Section of the Datamath Calculator Museum features under Calculator Chips "Datasheets" of the mentioned product families.

Characterization of Single-chip Calculator Circuits


Reverse-engineering of Single-chip Calculator Circuits


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If you have additions to the above article please email:

© Joerg Woerner, September 21, 2022. No reprints without written permission.