DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
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 |
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| 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
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) |
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:
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• TMS3834 - TI-71 (Work-In-Progress) • TMS3707NC - NIB (February 1981) |
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.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, April 30, 2024. No reprints without written permission.