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Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!munnari.OZ.AU!spool.mu.edu!howland.erols.net!newsfeed.internetmci.com!news.corpcomm.net!funny.bahnhof.se!seunet!news2.swip.net!mn6.swip.net!plug.news.pipex.net!pipex!hole.news.pipex.net!pipex!bowl.news.pipex.net!pipex!snowdon.elsevier.co.uk!news From: Paul Richards <dpr@elsevier.co.uk> Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: freeBSD and P6/180 Date: 07 Nov 1996 10:30:58 +0000 Organization: ISEPD, Elsevier Science Ltd., Oxford. Lines: 24 Sender: dpr@tees.elsevier.co.uk Message-ID: <57g22mmc2l.fsf@tees.elsevier.co.uk> References: <32784DB5.2BDE@sybase.com> <h1LxvFQ.smartsignal@delphi.com> <57sp6oobnd.fsf@tees.elsevier.co.uk> <3280D2FC.28D5@www.play-hookey.com> NNTP-Posting-Host: tees.elsevier.co.uk X-Newsreader: Gnus v5.3/Emacs 19.30 Ken Bigelow <kbigelow@www.play-hookey.com> writes: > > You don't want a cpu at that speed either, make sure it's a multiple > > of 33 1/3 (roughly). > > Now you've got me puzzled. What's wrong with a multiple of 40 or 50 MHz > (always assuming the motherboard can run at one or the other of thoses > speeds)? I would expect that a higher motherboard speed would be > desirable, too. > > Could it be that the motherboard is expected to clock at 60 MHz for the > PP180? That would make more sense to me than running a 30 MHz clock and > a 6X multiplier. Yes. But it sounds like you've got an out of date notion of bus speeds. 40 and 50 Mhz is *slow*, you want to run the bus at 66Mhz. Running the bus at 60Mhz is a 6Mhz drop which people don't think is significant until you point out it's 10% -- Paul Richards. Originative Solutions Ltd. (Netcraft Ltd. contractor) Elsevier Science TIS online journal project. Email: p.richards@elsevier.co.uk Phone: 0370 462071 (Mobile), +44 (0)1865 843155