DATAMATH CALCULATOR MUSEUM
|
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 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.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, January 17, 2002. No reprints without written permission.