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Article #20218HP 9825A (was Was *this* the first RISC chip?)
From: Chris Torek
Date: Wed, 08 Mar 1989 07:24
Date: Wed, 08 Mar 1989 07:24
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In article <1532@ncar.ucar.edu> cruff@ncar.ucar.edu (Craig Ruff) writes: >Ah yes. When I was a college student with nothing better to do, >I wrote just such a simulator for the HP-41C ... on an HP 9825 desktop >(one line display!) we had in the chem lab. ... Too bad I didn't make >copies of the articles and the code and data files. I could have >put it on much more powerful computers! :-) Actually, the 9825A was, for its time, rather amazing. As I recall, it had a custom LSI 16-bit silicon-on-sapphire CPU. The nastiest limitation (aside from the `pushbutton' keyboards on the original machines) was that there were only 4 slots for cartridge ROMs. (You could still squeeze in five options by using a `binary tape'. We needed that a few times to run the plotter off the HP3060A system....) (HPL was weird. Remember r-variables? But at least with the A.P. ROM, you got functions and local variables.) -- In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 7163) Domain: chris@mimsy.umd.edu Path: uunet!mimsy!chris
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!decwrl!purdue!haven!mimsy!chris From: chris@mimsy.UUCP (Chris Torek) Newsgroups: comp.arch,comp.sys.hp Subject: HP 9825A (was Was *this* the first RISC chip?) Keywords: Hewlett-Packard, microprocessor, RISC Message-ID: <16274@mimsy.UUCP> Date: 8 Mar 89 07:24:42 GMT References: <1068@cantuar.UUCP> <1532@ncar.ucar.edu> Organization: U of Maryland, Dept. of Computer Science, Coll. Pk., MD 20742 Lines: 19