Xref: utzoo comp.arch:20141 sci.electronics:16869 Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!thunder.mcrcim.mcgill.edu!snorkelwacker.mit.edu!apple!goofy.apple.com!esmith From: esmith@goofy.apple.com (Eric Smith) Newsgroups: comp.arch,sci.electronics Subject: Need info on HP 1818-2500 uP Message-ID: Date: 11 Jan 91 03:27:25 GMT Sender: usenet@Apple.COM Organization: Frobozz Magic Widget Company Lines: 16 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 -- Eric L. Smith Opinions expressed herein do not necessarily reflect those esmith@apple.com of my employer, friends, family, computer, or even me! :-)