DATAMATH CALCULATOR MUSEUM
|
DATAMATH CALCULATOR MUSEUM |
Texas Instruments T-1220 distributed by True Value
| Date of introduction: | 1976 | Display technology: | LED-stick |
| New price: | $9.95 | Display size: | 8 |
| Size: | 5.5" x 2.8" x 1.4" 138 x 70 x 35 mm3 |
||
| Weight: | 3.9 ounces, 110 grams | Serial No: | 5060 |
| Batteries: | 9V | Date of manufacture: | wk 23 year 1976 |
| AC-Adapter: | AC9180 | Origin of manufacture: | USA |
| Precision: | 8 | Integrated circuits: | TMS0972 |
| Memories: | |||
| Program steps: | Courtesy of: | Joerg Woerner |
Nothing
else than a TI-1200 with another
keyplate sold under the name of True Value. Don't miss the T-1225
based on the TI-1250.
Maybe there is a story behind this calculator ? One source (1) tells that this calculator was planned as a regular TI calculator. Shortly after approval of the calculator by the QRA the project was stopped.
The box of the T-1220 states: Custom model manufactured for
True Value Hardware Stores.
The warranty address on the back of the calculator
is: Texas Instruments Service Facility.
Later
T-1220 models removed this text.
Don't miss the rare Texas Instruments 1265 manufactured for Koh-I-Noor Hardtmuth.
(1) The National Museum of American History's Chip Collection
Commets by Bill Heye, Ralph McCullough
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, December 5, 2001. No reprints without written permission.