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Datamath Calculator Museum DCM-50A (TMS0100)

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 TMS0100, TMS0600, TMS0700, 3*SN75493, 2*SN75494
Memories:   Displays:  HP 5082-7653
Program steps:   Courtesy of:  Joerg Woerner

The Datamath Calculator Museum DCM-50A (TMS0100) 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:

TMS0100 Family including TMS1802 and TMS1875
TMS0600 Family
TMS0700 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

TMS0100 Family

The DCM-50A Platform supports the Characterization of TMS0100 Devices including TMS1802 and TMS1875 in its left-most TMS0100 Textool Test Socket with the voltages VSS set to 7.2V and VGG set to -7.2V, accordingly.

Device-under-Test:

TMS1875NC - Heathkit IC-2008 (March 1972)
TMS0101NC - Heathkit IC-2008A (May 1972)
Work-In-Progress

Reverse-engineering of Single-chip Calculator Circuits

Work-In-Progress.


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If you have additions to the above article please email: joerg@datamath.org.

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