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Date:      Sat, 30 May 1998 19:47:04 -0700
From:      Mike Smith <mike@smith.net.au>
To:        dyson@FreeBSD.ORG
Cc:        nirva@ishiboo.com (Danny Dulai), freebsd-multimedia@FreeBSD.ORG, freebsd-current@FreeBSD.ORG
Subject:   Re: Fastvid: no speed increase :( 
Message-ID:  <199805310247.TAA08863@antipodes.cdrom.com>
In-Reply-To: Your message of "Sat, 30 May 1998 18:54:20 CDT." <199805302354.SAA00461@dyson.iquest.net> 

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> Danny Dulai said:
> > Quoting John S. Dyson (toor@dyson.iquest.net):
> > > > Quoting Daniel O'Connor (doconnor@gsoft.com.au):
> > > > > 
> > > > > The speedup factor is 1.89, mmm :)
> > >
> > > This is a copy of the original code that I submitted to someone who
> > > cleaned it up (I am sorry that I forgot who actually took ownership.)
> > 
> > I used this code, set the VIDPHYSADDR to 0xe1800000 and VIDPHYSSIZE to
> > 0x800000, and MSRINDEX is set to 5 (??) and experienced NO speed increase
> > at all when using xengine.
> > 
> If the (VGA/System)bios works right, then fastvid isn't needed.

Many system BIOS setup programs have a "VGA buffer UC/USWC" option.  
The UC option is "just uncached", while the "USWC" option enables write 
combining.

-- 
\\  Sometimes you're ahead,       \\  Mike Smith
\\  sometimes you're behind.      \\  mike@smith.net.au
\\  The race is long, and in the  \\  msmith@freebsd.org
\\  end it's only with yourself.  \\  msmith@cdrom.com



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