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From: vernick@cs.sunysb.edu (Michael Vernick)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: Problems with Mach64 Accelerator
Date: 6 Nov 1995 04:24:25 GMT
Organization: State University of New York at Stony Brook
Lines: 42
Message-ID: <47k2lp$58b@abel.cc.sunysb.edu>
References: <1995Nov1.162427.21676@zippy.dct.ac.uk> <DHGuFG.F6C@tigger.jvnc.net>
NNTP-Posting-Host: sbgrad9.cs.sunysb.edu
John Lucas (jlucas@uvi.edu) wrote:
: In article <1995Nov1.162427.21676@zippy.dct.ac.uk>,
: sh@dstn26.dct.ac.uk (Sinclair Hay) wrote:
: >Has anyone else been having problems with the ATI Mach 64
: >Graphics Accelerator card. When I boot up and the serial ports
: >are probed my screen goes blank and the machine continues to boot
: >and operate as normal (except for the totally blank screen).
: >
: >If I swap the Mach 64 for an old VGA card everything works OK.
: >
: >Therefore if I want to use FreeBSD I have to disable my serial
: >ports. As a result I have no mouse and I can't use X windows.
: >
: >Any suggestions will be gratefully received
: >
: I have the same (and other) problems with the ATI Graphics Xpression. I have
: given up and am searching for a replacement card (PCI bus supported by XFree86
: v3.1.2). I built a kernal without sio support and used a bus mouse, which
: allowed FreeBSD to boot, but I could not get a working "Clocks" line for the
: ATI board, so XFree86 won't work.
I received this information about a fix. It works for us.
>You may have better luck with a different modem video card, or if you
>can't accept that, swap temporarily, and rebuild a kernel with
>the following change to /sys/i386/isa/sio.c :
>
>static Port_t likely_com_ports[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, };
>
>changed to
>
>static Port_t likely_com_ports[] = { 0x3f8, 0x2f8, 0x3e8, };
>
>This will avoid the clobbering of the S3 registers. The only people to
>blame here are the morons at S3 who put them there. It's a pity, because
>apart from that wart, the chips perform _very_ well.
>
--
Michael Vernick vernick@sbcs.sunysb.edu
Dept. Of Computer Science @ SUNY SB (516)-632-8434
Stony Brook, NY 11794