Article View: comp.sys.cdc
Article #8Re: CDC nostalgia
From: Andy Davidson
Date: Fri, 30 Mar 1990 00:45
Date: Fri, 30 Mar 1990 00:45
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In article <7496@hydra.gatech.EDU> roy@prism.gatech.EDU (Roy Mongiovi) writes: >I did always kind of think that B1 ought to have been one, though. >(Or for the really old-timers, maybe that should have been B7.) Yeah. More than once I remember searching for bugs in Kronos and later in 7600 Scope 1 because some rogue program had changed B1 (or B7) from being 1. There were pseduo-ops if I recall correctly called B1=1 and B7=1 in COMPASS so that the assembler could use B1 (or B7) instead of having to use a constant 1. This reduced many increment instructions to 15 bits instead of 30. My first CDC machine was the 3600 and later the 6500 at Michigan State between 1965 and 1969. Much later I worked on 6600 serial 2? 4? at LBL. Hi, Steve. andy Andy Davidson Toolsmith-in-residence Tektronix,Inc (503) 685-3033 Internet: andyd@pogo.WV.tek.com uucp: ...!tektronix!pogo!andyd -- Andy Davidson Toolsmith-in-residence (503) 685-3033 Internet: andyd@pogo.WV.tek.com uucp: ...!tektronix!pogo!andyd
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!zephyr.ens.tek.com!tekgen!andyd From: andyd@tekgen.BV.TEK.COM (Andy Davidson) Newsgroups: comp.sys.cdc Subject: Re: CDC nostalgia Keywords: CDC, nostalgia, 6600 Message-ID: <5730@tekgen.BV.TEK.COM> Date: 30 Mar 90 00:45:03 GMT References: <1990Mar28.032615.12039@ultra.com> <7496@hydra.gatech.EDU> Reply-To: andyd@tekgen.BV.TEK.COM (Andy Davidson) Organization: Tektronix, Inc., Beaverton, OR. Lines: 26