DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Texas Instruments TI-1788 II
| Date of introduction: | 1982 | Display technology: | LCD |
| New price: | Display size: | 8 | |
| Size: | 3.6" x 2.3" x 0.3" 91 x 57 x 8 mm3 |
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| Weight: | 1.3 ounces, 38 grams | Serial No: | 82862643 |
| Batteries: | 2*LR43 | Date of manufacture: | year 1982 |
| AC-Adapter: | Origin of manufacture: | Taiwan | |
| Precision: | 8 | Integrated circuits: | NEC uPD1032G |
| Memories: | 1 | ||
| Program steps: | Courtesy of: | Joerg Woerner |
The
TI-1788 II corrected the unusual keyboard layout of the TI-1788
introduced just a few month earlier. Unfortunately is even this revised
layout not very convenient, you hit easily the [CE/C] button and have to repeat your
previous calculation!
The
backside of the calculator reveals another unusual feature - a hidden [POWER]
switch. The calculator was obviously manufactured in Taiwan but we are not able
to trace back its roots.
Dismantling the featured TI-1788
II calculator manufactured in 1982 by a non-disclosed
Original Equipment Manufacturer (OEM) reveals a very clean design centered around a NEC uPD1032G single-chip calculator circuit soldered on a double-sided printed circuit board (PCB) and powered by two small LR43 batteries.
Inspecting
the PCB of this TI-1788 II calculator brought our attention to a small mark reading
CC-31C-10, similar marks could be found with the TI-1788 and
TI-1788 III, the latter manufactured
probably by
Cal-Comp
Electronics. We started compiling a list of the
PCB-Marks on calculators manufactured by OEMs for Texas Instruments.
The next calculator in this product line added a
not only World Time, Calendar and Stopwatch features to the TI-1788 II, but even
conversion capabilities. Don't miss the TI-1788
III.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, April 5, 2008. No reprints without written permission.