DATAMATH CALCULATOR MUSEUM
|
DATAMATH CALCULATOR MUSEUM |
Texas Instruments TI-1270
| Date of introduction: | April 21, 1976 | Display technology: | LED-stick |
| New price: | $18.95 | Display size: | 8 |
| Size: | 5.5" x 2.8" x 1.4" 138 x 70 x 35 mm3 |
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| Weight: | 3.9 ounces, 110 grams | Serial No: | A 64488 |
| Batteries: | 9V | Date of manufacture: | wk 37 year 1976 |
| AC-Adapter: | AC9180 | Origin of manufacture: | Italy (RCI) |
| Precision: | Integrated circuits: | TMS0974/ZA0355 | |
| Memories: | 1 | ||
| Program steps: | Courtesy of: | Joerg Woerner | |
| Download manual: | 
(US: 2.3M Bytes)
(EU: 3.5M Bytes) |
The
colorful TI-1270 was manufactured both in the United
States and Italy, the only differences are the design the of the
Product Labels on the backside of the
calculators.
Dismantling
the featured TI-1270 with
Date code 3776 RCI and manufactured in
September 1976 in Rieti, Italy reveals a printed circuit board (PCB) identical with the
Hardware Version 3 of the TI-1200 and
TI-1250 calculators. The only change is the
single-chip calculator circuit, we located a TMS0974
instead the TMS0972.
The
TMS0970 series is based on the TMS1000,
the World's first Microcomputer.
We located recently a TI-1270 sporting a almost red
faceplate and manufactured in Italy, too. We are not sure if this color was intended or
was simply a quality
issue.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, July 2, 2021. No reprints without written permission.