*BSD News Article 25047


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Newsgroups: comp.os.386bsd.questions
Path: sserve!newshost.anu.edu.au!munnari.oz.au!news.Hawaii.Edu!ames!agate!howland.reston.ans.net!xlink.net!rz.uni-karlsruhe.de!subnet.sub.net!ppcnet.ppc.sub.org!rumtifsl.ruessel.sub.org!strix.ruessel.sub.org!ura
From: ura@strix.ruessel.sub.org (Ulf Andrick)
Subject: 386bsd and Cyrix 486DX40
Organization: Nocturnal Unix System in Kaiserslautern, Germany
Message-ID: <CI1x9I.6t@strix.ruessel.sub.org>
X-Newsreader: TIN [version 1.1 PL8]
Date: Wed, 15 Dec 1993 00:55:51 GMT
Lines: 13

I tried to run 386bsd without math emulation on a Cyrix 486DX40.
The kernel was compiled with cpu i386 and options i387, as that was what
I had before. The recognition of the FPU at boot time failed.
Is there some known incompatibility of Cyrix 486DX to i486?
Could the problem be solved by changing to an AMD processor?
Would it be unreasonable to change npxprobe so that it indicates the
presence of an FPU without probing (or would the failure of probing
really mean that normal use of the FPU would also fail)?
Or must there be something wrong with the mother board?

-- 
Ulf Andrick
ura@strix.ruessel.sub.org