Date: Tue, 27 Jun 1995 08:59:43 +0300
From: eliz AT is DOT elta DOT co DOT il (Eli Zaretskii)
To: mjc AT star DOT ucl DOT ac DOT uk
Subject: Re: ATI Mach64.
Cc: djgpp AT sun DOT soe DOT clarkson DOT edu

> Does anyone have a grn driver for the ATI Mach64 card?  I need to run 
> 800x600 256 colour (vesa 103h) mode.

Why not try the built-in VESA driver first?  This is explained in the
DJGPP FAQ list (available as faq102.zip from the same place you got DJGPP):
 
10.4  Q: I looked into cbgrx103.zip, but couldn't find the driver for my
         Mucho Extra Perfectum SVGA card.
      Q: The driver for my SVGA doesn't seem to work.
      A: Most current SVGA adapters are VESA-compatible, so try the VESA
         driver built into go32 first.  Do not define any driver in the
         GO32 environment variable (so that go32 will use its internal
         driver) and try to run some graphics program.  (You might want to
         run it first with the VGA.GRD standard VGA driver, so you will
         know how the ``correct'' display should look like.)
 
         For some cards the updated versions of their drivers are in
         grx103m1.zip maintenance release of GRX, so if the above doesn't
         work, download that file and look for a driver suitable for your
         card.
 
         If the driver you need cannot be found neither in cbgrdXXX.zip
         nor in its maintenance releases, or don't work right, try
         anonymous ftp to omnigate.clarkson.edu, directory
         /pub/msdos/djgpp/pub.  There are some contributed drivers there.
 
         There is also a program called DISPLAY which includes some
         additional graphics drivers.  DISPLAY is available as
         dispNNN.zip on SimTel mirrors in the graphics/ directory.
 
10.5  Q: I've heard that the built-in graphics driver is a VESA driver,
         but it doesn't seem to work on my Acme SVGA/DeLuxe with on-board
         VESA BIOS Extensions.
      A: With some SVGAs, the built-in VESA driver in DJGPP 1.12 will work
         reliably only if you explicitly set the number of colors to 256,
         like this:
 
                      set GO32=nc 256
 
         If you want non-default resolution, you can set it too, like this:
 
                      set GO32=gw 1024 gh 768 nc 256
 
         If this still doesn't work, then maybe your card isn't as
         VESA-compatible as it claims to be.  You can make it compatible
         by installing the UNIVBE TSR program.  It supports many of SVGAs
         currently on the market and has a very good record of VESA
         compatibility.  You can find UNIVBE as univbeXX.zip on any SimTel
         mirror in msdos/graphics directory.