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Datamath Calculator Museum DCM-50A (OTHERS)

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 TMS0950, TMS0970, 3*SN75493, 2*SN75494
Memories:   Displays:  HP 5082-7653
Program steps:   Courtesy of:  Joerg Woerner

The Datamath Calculator Museum DCM-50A (OTHERS) is based on the generic DCM-50A Platform to access all features of calculators based on non-TI single-chip calculator circuits and certain features of products other than calculators:

Non-TI Calculator Chips
Other Products with TI Chips
Other Products with Non-TI Chips

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 various products.

Characterization of Single-chip Calculator Circuits

Non-TI Calculator Chips Family

The DCM-50A Platform supports the Characterization of many Non-TI single-chip calculator circuits with 28-pin packages in its right-most TMS1000 Textool Test Socket due its increased flexibility with the patch field for all 28 pins of the device-under-test. Missing signals might be jumpered to the TMS0100/TMS0800 Textool Test Sockets or generated with additional breadboards attached to the DCM-50A (Platform).

Device-under-Test:

AMI S2144 - Melcor Model 1000 (October 1973)
MOSTEK MK5020A - Heathkit IC-2006 (November 1973)

Other Products with TI Chips

The DCM-50A Platform supports the Characterization of many products using a multiplexed 7-Segment display like alarm clocks or frequency counters with 28-pin packages in its right-most TMS1000 Textool Test Socket due its increased flexibility with the patch field for all 28 pins of the device-under-test. Missing signals might be jumpered to the TMS0100/TMS0800 Textool Test Sockets or generated with additional breadboards attached to the DCM-50A (Platform).

Device-under-Test:

TMS3834 - TI-71 (Work-In-Progress)
TMS3707NC - NIB (February 1981)

Other Products with Non-TI Chips

The DCM-50A Platform supports the Characterization of many products using a multiplexed 7-Segment display like alarm clocks or frequency counters with 28-pin packages in its right-most TMS1000 Textool Test Socket due its increased flexibility with the patch field for all 28 pins of the device-under-test. Missing signals might be jumpered to the TMS0100/TMS0800 Textool Test Sockets or generated with additional breadboards attached to the DCM-50A (Platform).

Device-under-Test:

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, April 30, 2024. No reprints without written permission.