From owner-cvs-all  Wed May 26  8:11:49 1999
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Date: Wed, 26 May 1999 16:09:45 +0100
From: Roger Hardiman <roger@cs.strath.ac.uk>
Organization: University of Strathclyde
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To: Nick Hibma <nick.hibma@jrc.it>
Cc: Roger Hardiman <roger@FreeBSD.org>, cvs-committers@FreeBSD.org,
	cvs-all@FreeBSD.org
Subject: Re: cvs commit: src/sys/conf options
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Nick,
> 
> Are the Brooktree cards the only bus master cards that suffer from
> this problem? Shouldn't this be solved lower down in the PCI code?

The 430FX and SIS/VIA/OPTi chipset workarounds are actually inside
the Bt878 hardware. Brooktree included them because these
chipsets do not implement the PCI 2.1 specification properly.
They are broken chipsets.

(something to do with the order the various i/o control lines
are raised/lowered. It is all at the hardware level anyway)


However, this is NOT the same as the problem I emailed to
-hackers about Video Corruption.
That is occuring on good chipsets and with Bt848 cards.
And there was no corruption on 2.2.x and there is corruption on 3.1
and VIC users (including commercial ones) are now switching to 3.1
as a result.

Bye
Roger


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