DATAMATH CALCULATOR MUSEUM
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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: | 21879 |
| Batteries: | 4*AAA | Date of manufacture: | mth 11 year 1989 |
| AC-Adapter: | Origin of manufacture: | Taiwan | |
| Precision: | 10 | Integrated circuits: | TMP84C00, TC531000, UM6116, LCD-Driver |
| Memories: | 1 | ||
| Program steps: | Courtesy of: | Joerg Woerner |
Texas
Instruments introduced already in the year 1989 this powerful
Spell-Checker. The later RR-2 added a Thesaurus to the
Spell-Checker function.
A much smaller product followed within 1 year, don't miss the PS-3000.
What is a Spell-Checker ? Type in a word and the Spell-Checker compares it immediately with roughly 97,000 words of its memory.
We
noticed some minor changes of the key printing during production time. The model
on the right uses for the ON/OFF-key another place.
The hardware of the RR-1 is similar to a lot of later products:
A 8-bit microprocessor of the Z80 family, a huge ROM of 128k Byte capacity, a
RAM of 2k Byte size and a driver for the LCD display. You'll find similar
architectures with just another balance of RAM and ROM capacity in complete
different products:
| Product | ROM-size | RAM-size | Example |
| Spell-Checker | 128k Byte | 2k Byte | RR-1 |
| Data Bank | 64k Byte | 64k Byte | PS-6700 |
| Graphing calculator | 128k Byte | 8k Byte | TI-81 |
| Modern graphing calc | 512k Byte | 32k Byte | TI-83 Plus |
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, January 17, 2002. No reprints without written permission.