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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"
 147 x 72 x 22 mm3
   
Weight:  3.0 ounces, 84 grams Serial No:  0068823
Batteries:  2*LR44 Date of manufacture:  mth 03 year 1985
AC-Adapter:   Origin of manufacture:  Taiwan (C)
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.

TI-Programmer-II_PCB.jpg (441392 Byte)TI-Programmer-II_BACK.jpg (261371 Byte)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.



horizontal rule

If you have additions to the above article please email: joerg@datamath.org.

Joerg Woerner, December 5, 2001. No reprints without written permission.