DATAMATH CALCULATOR MUSEUM
|This PS-4000 Pocket
manufactured in July 1990 by
Inventec Corporation in Taiwan (Date code I-0790 » mth 07 yr 1990).
|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.
T9989A Application Specific CPU
with its Z80 compatible core.
memory of the PS-3000
with 512k Bytes capacity.
|The PS-4000 makes use of
one Data memory
chip with 2k Bytes capacity.
driver of the PS-4000 hides
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© Joerg Woerner, November 23, 2009. No reprints without written permission.