








                      Information for Cyrix Chipset Users

                           The XFree86 Project Inc.

                                6 November 1998



1.  Supported hardware

This driver (as used in the SVGA (VGA256), VGA16 and VGA_Mono servers) supports
a single chipset `mediagx' that should work on the following Cyrix CPUs with
integrated graphics:

   o MediaGX

   o MediaGXi

   o MediaGXm


2.  Features

   o accelerated

   o hardware cursor

   o support color depths 1, 4, 8 and 16


3.  XF86Config Option

      Option "sw_cursor"
            disable the hardware cursor.

      Option "no_accel"
            completely disables acceleration. Usually not recommended.


4.  Bugs and Limitations

   o On some older chipsets, the driver may trigger an illegal instruction just
     after probing for the ``scratchpad size''.  If this is the case, email to
     Annius.Groenink@cwi.nl with the output of

          XF86_SVGA -probeonly -verbose


     and this will be fixed.

   o There are limitations to the modeline values that can be specified.  Par-
     ticularly, the difference between the first two horizontal timings (e.g.


Information for Cyrix Chipset Users                                           1





Information for Cyrix Chipset Users                                           2



     640 656, 1024 1048) must be at least 16 and at most 24.

   o The 4 colour server is slow due to the VGA banking mode used.  Moreover,
     it does not work the way it is run by XF86Setup, which is probably due to
     the timing limitations.


5.  Authors

   o Annius Groenink <Annius.Groenink@cwi.nl>

   o Dirk Hohndel <hohndel@XFree86.org>

   o Special thanks to Cyrix and Wyse for helping us with the development of
     this server.

     Generated from XFree86: xc/programs/Xserver/hw/xfree86/doc/sgml/cyrix.sgml,v 1.1.2.3 1998/11/07 13:37:52 dawes Exp $













































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                                   CONTENTS



1. Supported hardware  ...................................................... 1

2. Features  ................................................................ 1

3. XF86Config Option  ....................................................... 1

4. Bugs and Limitations ..................................................... 1

5. Authors .................................................................. 2











































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