DATAMATH CALCULATOR MUSEUM
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DATAMATH CALCULATOR MUSEUM |
Additional Pictures
| This PS-4000 Pocket
Speller was
manufactured in July 1990 by Inventec Corporation in Taiwan (Date code I-0790 » mth 07 yr 1990).
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| The standard hardware
of the PS-4000 makes use of a 8-bit microprocessor based on the Z80 family, a huge ROM, a small RAM and an integrated display driver.
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| The Toshiba
T9989A Application Specific CPU with its Z80 compatible core.
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The Program/Word
memory of the PS-3000 with 512k Bytes capacity.
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| The PS-4000 makes use of
one Data memory chip with 2k Bytes capacity.
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The display
driver of the PS-4000 hides its specification.
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If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, November 23, 2009. No reprints without written permission.
