HP Forum Archive 05

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HP Microprocessors Message #1 Posted by Chris Leyson on 28 Dec 2000, 5:44 a.m. Hi everyone and a Happy New Year. I have an HP3585A spectrum analyser. A really nice piece of kit but no longer supported by HP. The service manual claims that the microprocesor used is the same as in the HP9825 calculator. It's an 82 pin hybrid mounted on a heatsink with 16-bit data and address bus. Part is marked 09825-67907. Anybody got any data on this part, timing diagrams or op-code map ? Chris Leyson

Re: HP Microprocessors Message #2 Posted by Eric Smith on 20 Jan 2001, 1:34 a.m., in response to message #1 by Chris Leyson It's a three-chip processor. The "main" chip is the BPC, or Binary Processor Chip. In some equipment, such as the 9872 plotters, the BPC chip is used alone rather than as part of a hybrid. The only publicly available info on it is in the HP 9835 and HP 9845 assembler ROM manuals. The architecture is sort of like the HP 2116 minicomputer, but differs in all the details. No electrical specs or timing info are available.

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