  Information for Tseng Chipset Users
  The XFree86 Project, Inc.
  29 July 1996

  1.  Supported chipsets

  The Tseng chipsets supported by XFree86 are ET3000, ET4000, ET4000/W32
  and ET6000. At this time, the accelerated features of the ET4000/W32
  and ET6000 are not supported by the SVGA driver; the chipset is
  treated as a standard ET4000. For details about the accelerated
  ET4000/W32 and ET6000 server, refer to README.W32 <W32.html>.

  2.  Clock selection problems with some ET4000 boards

  XFree86 has some problems getting the clock selection right with some
  ET4000 boards when the server is started from a high-resolution text
  mode.  The clock selection is always correct when the server is
  started from a standard 80x25 text mode.

  This problem is indicated when the reported clocks are different when
  the server is started from the high-resolution text mode from what
  they are when it is started from the 80x25 text mode.  To allow the
  server to work correctly from the high-resolution text mode, there are
  some Option flags that may be set in XF86Config.  To find out which
  flags to set, start the server with the -probeonly flag from an 80x25
  text mode and look at the information printed by the server.  If the
  line:

    VGAXXX: ET4000: Initial hibit state: low


  is printed, put the following in the SVGA, VGA16 and VGA2 sections of
  your XF86Config:

    Option "hibit_low"


  If the line:

    VGAXXX: ET4000: Initial hibit state: high


  is printed, put the following in the SVGA, VGA16 and VGA2 sections of
  your XF86Config:

    Option "hibit_high"



  3.  Text mode restore problems

  In XFree86 1.3, an option flag ``force_bits'' was provided as an
  experiment to attempt to alleviate text-restoration problems that some
  people experienced.  We have now made the behavior of this option the
  default, hence the flag has been removed.  Hopefully the past text-
  restoration problems are alleviated in XFree86 2.0.










  Generated from XFree86: xc/programs/Xserver/hw/xfree86/doc/sgml/tseng.sgml,v 3.6 1996/08/13 11:30:59 dawes Exp $





  $XConsortium: tseng.sgml /main/3 1995/11/12 20:00:47 kaleb $




























































$XFree86: xc/programs/Xserver/hw/xfree86/doc/README.tseng,v 3.13 1996/08/13 11:42:20 dawes Exp $
