DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Texas Instruments Programmer II
| Date of introduction: | 1985 | Display technology: | LCD |
| New price: | Display size: | 8 | |
| Size: | 5.8" x 2.8" x 0.85" | ||
| Weight: | 3.5 ounces | Serial No: | 0104902 |
| Batteries: | 2*LR44 | Date of manufacture: | mth 10 year 1985 |
| AC-Adapter: | Origin of manufacture: | Taiwan | |
| Precision: | 9 | Integrated circuits: | CD4569 |
| Memories: | 1 | ||
| Program steps: | Courtesy of: | Gerhard Wenzel |
Seems
to be identical to the LCD Programmer using the new slanted housing of the
TI-55-III and the keyboard of the BA-II.
If you take your time comparing this calculator with all other
members of the second slanted series (BA-54,
TI-57-II) you notice something
very special. The keyboard position doesn't fit to the usual spacing. The ON/C-key
is misplaced and one key is super-sized. You have to open the calculator to get
the answer: This
is not the usual construction of a slanted calculator! A very small
printed-circuit-board, actual the form factor of a modern slimline calculator
like the BA-II, is fitted into the housing.
Recently at the famous calculator collection of the Heinz
Nixdorf Museums Forum (HNF) located
in Paderborn, Germany a different housing of the Programmer II was discovered.
The model of the exhibition uses a larger display frame that covers even the
ON/C key.
Read more about George Boole, the inventor of the Boolean algebra.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, December 5, 2001. No reprints without written permission.