DATAMATH CALCULATOR MUSEUM
Texas Instruments BA-III Executive Business Analyst
|Date of introduction:||1986||Display technology:||LCD|
|New price:||Display size:||10 (7 + 2)|
|Size:|| 5.8" x 2.8" x 0.85"
147 x 72 x 22 mm3
|Weight:||3.0 ounces, 84 grams||Serial No:|
|Batteries:||2*LR44||Date of manufacture:||wk 48 year 1990|
|AC-Adapter:||Origin of manufacture:||Italy|
|Program steps:||Courtesy of:||Joerg Woerner|
|Download manual:||(US: 5.2 MByte)|
This rare BA-III is an unusual calculator within the second generation slanted family. We are used to find a direct counterpart with scientific functions for each calculator. Here we fail!
The first slanted calculator appeared with the TI-55-II already in the year 1981. It uses a different architecture compared with the earlier slimline calculators, e.g. two calculator chips of the TP0456 (CD4556) family. This allowed the usage of a 8+2 display compared with the 5+2 display and 45 keys instead the 40 keys found with the slimline calculators.
The second generation slanted calculators starting with the TI-55 III differed from the first generation mainly in the keyboard design. Nevertheless the old-fashioned electronics based on the TP0320 (CD3202) from the slimline calculators could be found in the slanted housing, too. Don't miss the TI-53.
This BA-III uses a display with 10 digit resolution, in engineering mode it changes to 7+2 digits. We know this behavior from the TI-60.
If we dig deeper into the calculator we located the calculator-chip, a TP0458B
(CD4812) chip. This gives us a good picture of the BA-III: A calculator similar
to the earlier BA-II with some enhancements in
both functions and display capability in the second generation slanted housing.
Don't miss the prototype of a BA-III that never materialized and the later BA II PLUS.
If you have additions to the above article please email: firstname.lastname@example.org.
© Joerg Woerner, December 15, 2001. No reprints without written permission.