DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Texas Instruments TI-2500-II / Datamath II
| Date of introduction: | November 11, 1974 | Display technology: | LED-stick |
| New price: | $49.95, DM 148.00 | Display size: | 8 |
| Size: | 5.5" x 3.0" x 1.7" 139 x 76 x 42 mm3 |
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| Weight: | 6.7 ounces, 191 grams | Serial No: | 2500-II-256861 |
| Batteries: | 2*AA NiCd | Date of manufacture: | wk 32 year 1975 |
| AC-Adapter: | AC9130 | Origin of manufacture: | USA |
| Precision: | Integrated circuits: | TMS0803 | |
| Memories: | |||
| Program steps: | Courtesy of: | Joerg Woerner | |
| Download manual: | 
(US: 2.5M Bytes) |
The
Datamath II alias TI-2500-II is a quite funny calculator. It uses the modern
electronics of the stylish TI-1500 calculator in the old-fashioned Datamath
housing. It was introduced late and never a big success.
The main difference to the other Datamath calculators is the
added [%] key and the usage of only 2 rechargeable NiCd batteries. Take a look on
the Version 1 of the Datamath!
A more detailed comparison between the ten known Datamath Versions could be found here.
The Datamath II seems to be together with the TI-150 the last TI calculator using the standard Klixon™ keyboard technology.
In Spain this calculator was labeled TI-2500 II without the dash at the series II designation.
Ken Shirriff studied the United
States Patent Application
US3934233A
describing the TMS0800 architecture and the program code used with the
TI-1500 very carefully and was
able to create a JavaScript Simulator
for the TMS0800 simulating a (slightly modified)
TI-2500-II.
Datamath™ and Klixon™ are trademarks of Texas Instruments.
The TI-2500-II is featured in the Texas Instruments
Deutschland GmbH leaflet
ER-1975 dated 1975.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, December 5, 2001. No reprints without written permission.