From: votava <votava AT worldnet DOT fr>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: programming s3 trio 64v+
Date: Thu, 20 Mar 1997 10:53:15 +0100
Organization: SCT / Worldnet - Internet Provider & Information Exchange - Paris, France
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References: <01bc306c$df487440$3350c5a3 AT pni> <5FMdmAAvlrKzEwzV AT talula DOT demon DOT co DOT uk>
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To: djgpp AT delorie DOT com
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Shawn Hargreaves wrote:
> 
> > need to get info to develop bitblit/ screen scroll functions in
> > 800x600 / 1024x768 256 color modes for this chipset can any one help?
> 
> If you are happy using a library, Allegro provides blitting and
> scrolling functions, and supports the S3 chipset both directly and via
> VESA.
> 
> If you want to do it yourself, you need to decide whether you are going
> to write hardware-specific code or use the VESA interface. Personally
> I'd recommend VESA because, assuming you have a VBE 2.0 implementation
> like UniVBE, it is just as fast as any native code but will work on any
> hardware. You can get the VBE 2.0 spec, along with some sample code for
> accessing linear framebuffers, from http://www.rt66.com/brennan/~djgpp/.
> 
> Should you prefer to write direct-to-the-metal, hardware specific code,
> get a copy of VGADOC from x2ftp.oulu.fi (can't remember the exact path,
> it's in something like /pub/msdos/programming/docs). It might also be
> worth taking a look at the S3 driver I wrote for Allegro.
> 
> /*
>  *  Shawn Hargreaves - shawn AT talula DOT demon DOT co DOT uk - http://www.talula.demon.co.uk/
>  *  Beauty is a French phonetic corruption of a short cloth neck ornament.
>  */

at http://www.s3.com you can find a vbe2.0 driver for s3 trio .
It is free and you can use it for vesa applications.