  Information for Tseng Chipset Users
  The XFree86 Project, Inc.
  13 November 1994

  1.  Supported chipsets

  The Tseng chipsets supported by XFree86 are ET3000, ET4000, and
  ET4000/W32.  At this time, the accelerated features of the ET4000/W32
  are not supported; the chipset is treated as a standard ET4000.  For
  details about the accelerated ET4000/W32 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.

  $XConsortium: tseng.sgml,v 1.2 95/01/23 15:34:58 kaleb Exp $
  Generated from XFree86: xc/programs/Xserver/hw/xfree86/doc/sgml/tseng.sgml,v 3.4 1995/01/28 16:03:19 dawes Exp $















