*BSD News Article 23114


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From: nate@bsd.coe.montana.edu (Nate Williams)
Newsgroups: comp.windows.x.i386unix,comp.windows.x,comp.unix.pc-clone.32bit,comp.os.mach,comp.unix.osf.osf1,comp,comp.unix.bsd,biz.univel.misc,comp.unix.sys5.r4,comp.unix.sys5.r3
Subject: Re: Annoucing the release of XFree86 2.0
Date: 1 Nov 1993 06:10:22 GMT
Organization: Montana State University, Bozeman  MT
Lines: 42
Message-ID: <2b298e$she@pdq.coe.montana.edu>
References: <CFrLs5.9qC@aib.com> <hastyCFrz64.LM5@netcom.com>
NNTP-Posting-Host: bsd.coe.montana.edu

In article <hastyCFrz64.LM5@netcom.com>,
Amancio Hasty Jr <hasty@netcom.com> wrote:
>Minor corrections:
>
>
>>                Information for former XS3 users


>>  -  Real support for the S3 86C928 (no Hack needed); the server defaults
>>     to use the Memory-Mapped-IO (mmio) routines for 928 boards which give
>>     a significant performance boost on some operations. This can be
>>     overruled with the 'chipset "s3_generic"' keyword.
>
>	For quite sometime, XS3 has worked with the 928 cards;however,
>	the linux support has lacked behind.
>	XS3.mmio does use memory mapped i/o.

On local bus cards?

>>  -  Rudimentary support for Brooktree Bt485 RAMDACs (full support will be
>>     available shortly). This basically means that on boards with the Bt485 
>>     the maximum dot clock frequency is restricted to 85MHz. These boards 
>>     are for example the #9GXe, the Metheus Premier and the ELSA Winner 2000.
>
>	XS3 does not restrict the user to 110Mhz there is a bug which
>	does not restore the screen properly;however, with the XFree86
>	I am stuck by not been able to run at clock rates greater than
>	110Mhz.

If you do not restrict the clock on the Brooktree Bt485 RAMDACS, then
you are risking HARDWARE damage to your video card.  At ~$300/card, I
would not want to be using XS3 when my card went belly-up.  Note that
the limitation is for a particular RAMDAC, and not for all RAMDACS. A
fix is in the works, but the release needed to go out the door.


Nate
-- 
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