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From: David Dawes <dawes@Physics.usyd.edu.au>
Message-Id: <199511290510.QAA03876@suphys.physics.usyd.edu.au>
Subject: Re: Problem with sio probe and Mach64 PCI video card
To: msmith@atrad.adelaide.edu.au (Michael Smith)
Date: Wed, 29 Nov 1995 16:10:08 +1100 (EST)
Cc: dawes@rf900.physics.usyd.edu.au, hackers@FreeBSD.ORG
In-Reply-To: <199511290035.AAA09696@genesis.atrad.adelaide.edu.au> from "Michael Smith" at Nov 29, 95 00:35:13 am
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>Remove the entry for 0x2e8. 
>
>> The registers listed in the manual for the video card are:
>> 
>> 102, 1ce, 1cf, 2e8, 2ec, 2ed, 2ee, 2ef, 3x4, 3x5, 3x8, 3x9, 3xa, 3xb,
>> 3c?, 3dc, and 46e8.  (x=b for mono, x=d for colour).
>
>What a spectacular stuffup on their part 8(  Is there a _reliable_
>and safe way to probe for this card?

The register choice is historical -- IBM chose the 0x2e? addresses for
the 8514/A.  It affects all similar cards, but apparently to different
extents.  A serial port using the usual COM4 address simply can't
coexist with these type of cards (S3, ATI, etc).

David