DATAMATH CALCULATOR MUSEUM
Texas Instruments LCD Programmer
|Date of introduction:||April 1982||Display technology:||LCD|
|New price:||$50.00||Display size:||8|
|Size:|| 5.8" x 3.1" x 0.90"
147 x 79 x 23 mm3
|Weight:||3.7 ounces, 106 grams||Serial No:||83597851|
|Batteries:||2*LR44||Date of manufacture:||wk 26 year 1983|
|AC-Adapter:||Origin of manufacture:||USA|
|Precision:||9||Integrated circuits:||TP0455/CD4519 or TP0456/CD4569|
|Program steps:||Courtesy of:||Joerg Woerner|
|Download manual:||(US: 4.5M Bytes)|
The TI LCD Programmer is a very unusual calculator doing math not only on the base-10 system like our natural life but on base-8 and base-16, too. Long before SW-engineers got nice languages like JAVA or C++ they were used to program the microcontrollers in their native assembler languages. The only operations such a microcontroller is executing, are simple instructions to manipulate data. With the TI Programmer you could simulate these operations, e.g. AND, OR, XOR and SHIFT's in the data format of modern microcontrollers (hex or base-16) or old-fashioned minicomputers (octal or base-8).
From the technical aspects the TI Programmer is
at first glance nothing else than a
TI-55-II with one removed line of keys to give the
layout of the TI Programmer known from
the Majestic line. Dismantling the calculator reveals with the CD4569 a
single-chip architecture based on the TP0456 calculator circuit family.
Four years later this LCD Programmer was replaced with the Programmer II sporting the new slanted housing like the TI-55-III.
Read more about George Boole, the inventor of the Boolean algebra.
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© Joerg Woerner, December 5, 2001. No reprints without written permission.