DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Texas Instruments PS-4000 Pocket Thesaurus / Speller
| Date of introduction: | 1990 | Display technology: | LCD dot matrix |
| New price: | Display size: | 15 char | |
| Size: | 2.9" x 5.0" x
0.60" 73 x 127 x 15 mm3 |
||
| Weight: | 2.9 ounces, 81 grams | Serial No: | 60591 |
| Batteries: | 2*AAA | Date of manufacture: | mth 07 year 1990 |
| AC-Adapter: | Origin of manufacture: | Taiwan (I) | |
| Precision: | 10 | Integrated circuits: | CPU: Toshiba T9989A ROM: Toshiba TC534000 RAM: UMC UM6116 Display: LCD-Driver |
| Memories: | 1 | ||
| Program steps: | Courtesy of: | Joerg Woerner |
This
small Pocket Thesaurus is from the hardware and software almost identical to the RR-2
Thesaurus / Spell Checker introduced one year earlier.
Dismantling
this PS-4000 manufactured in 1990 in Taiwan reveals no surprises. The printed circuit board
(PCB) sports a very clean layout and we identify the major components
immediately.
The
hardware resembles more or less its predecessor RR2 but is now centered
around a Toshiba T9989A Application Specific CPU instead of the original 8-bit
Zilog Z80 processor.
The
program/word memory is labelled TC534000,
a OTP-ROM with a capacity of 512k Bytes
manufactured by Toshiba in Japan.
The
data memory of the PS-4000 is rather small with just 2k Bytes capacity. The
dismantled PS-4000 makes use of a UMC UM6116 chip.
The
display driver of the PS-4000 Pocket Speller makes use of a traditional package
but unfortunately is soldered "face down" to the PCB and we can't
identify its manufacturer and type.
Don't miss the PS-3000
Pocket Speller with almost identical hardware, using a smaller program/word memory with
128k Bytes capacity.
This PS-4000 was donated by Irina
Rouzaeva. Thanks!
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, March 17, 2002. No reprints without written permission.