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
 Toshiba TC531000
 RAM: UMC UM6116
 Display: LCD-Driver
Memories:  1    
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 OTP-ROM.

The RR-1 Spell Checker is featured in the Texas Instruments Incorporated leaflet Pocket Solutions (CL-1059) dated 1990.


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If you have additions to the above article please email:

Joerg Woerner, January 17, 2002. No reprints without written permission.