Date: Fri, 18 Apr 1997 07:55:12 -0600 (MDT) From: Nate Williams <nate@mt.sri.com> To: Bob Bishop <rb@gid.co.uk> Cc: KATO Takenori <kato@eclogite.eps.nagoya-u.ac.jp>, freebsd-bugs@freefall.freebsd.org Subject: Re: kern/3292: Cyrix 486 performance problem Message-ID: <199704181355.HAA20791@rocky.mt.sri.com> In-Reply-To: <l03020901af7cd2bf56c0@[194.32.164.2]> References: <199704172240.PAA11576@freefall.freebsd.org> <199704180204.LAA03835@gneiss.eps.nagoya-u.ac.jp> <l03020901af7cd2bf56c0@[194.32.164.2]>
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> >Because Cyrix sold 486SLC/DLC series as `up-grade products', I > >considered that FreeBSD should support old motherboard users and > >disable CPU cache by default[etc] > > Consider the possibilities: if it won't run FreeBSD with the cache enabled, > then either: > a) It won't run DOS either - motherboard just too broken No, it'll run DOS just fine, since context switches don't occur in DOS, and rarely in Windows. (Win95 stresses it a bit more, but it *may* still work, no guarantees). Just because it runs under DOS doesn't mean it ain't broken. I can show you *hundreds* of emails over the last 4-5 years that can testify to that. It's only been in the last year that motherboards/caches work 'out of the box' for the majority of motherboards, mostly due to the widespread acceptance of Win95, which is more picky about the hardware than previous M$ OS's. Nate
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