DATAMATH CALCULATOR MUSEUM
Texas Instruments RR-1 Spell-Checker
|Date of introduction:||1989||Display technology:||LCD dot matrix|
|New price:||Display size:||15 char|
|Size:||3.2" x 7.0" x 0.7"|
|Weight:||5.5 ounces||Serial No:||525467|
|Batteries:||4*AAA||Date of manufacture:||mth 06 year 1989|
|AC-Adapter:||Origin of manufacture:||Taiwan (I)|
|Precision:||10||Integrated circuits:|| CPU: Toshiba T84C00A
ROM: Hitachi HM62321 or
RAM: UMC UM6116
|Program steps:||Courtesy of:||Joerg Woerner|
Texas Instruments changed the design of the first Spell-Checker RR-1 within a few months, please focus on the printing of the [ON - OFF] key legend.
Dismantling this Spell-Checker manufactured in June 1989 reveals no surprises, the printed circuit board (PCB) seems to be identical.
We recently located a Spell-Checker manufactured end of 1989
with a Hitachi HM62321 Mask ROM instead the Toshiba TC531000
If you have additions to the above article please email: firstname.lastname@example.org.
© Joerg Woerner, January 17, 2002. No reprints without written permission.