[sci.electronics] Need info on HP 1818-2500 uP

esmith@goofy.apple.com (Eric Smith) (01/11/91)

Does anyone have any information on the instruction set of the HP
1818-2500 microprocessor?  It is used in the HP 7220, 7221, and 9872
plotters, and probably many other HP peripherals and computers of the
same era.  I would be interested in finding out what other models it
is used in.

So far the only information on it that I have is from the 9872B and
9872C service manuals, which give the pinout and bus timing only.  It
appears to be a 16 bit processor with a 32K word address space.

Thanks in advance!
Eric
esmith@apple.com
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Eric L. Smith      Opinions expressed herein do not necessarily reflect those
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