


XF86_VGA16(1)					    XF86_VGA16(1)


NAME
       XF86_VGA16  - 4 bit non-accelerated X Window System server
       for UNIX on x86 platforms

SYNOPSIS
       XF86_VGA16 [:displaynumber] [ option ] ...

DESCRIPTION
       XF86_VGA16 is a 4-bit PseudoColor server	 for  VGA  cards.
       It  also includes support for the non-VGA monochrome cards
       described in the XF86_Mono(1) manual page.  It may be  run
       in a dual-headed configuration.


CONFIGURATIONS
       The  XF86_VGA16 server supports the following popular SVGA
       chipsets in 16-colour mode.

	    ATI:
		18800,	18800-1,   28800-2,   28800-4,	 28800-5,
		28800-6,   68800-3,  68800-6,  68800AX,	 68800LX,
		88800

	    Tseng:
		ET4000

	    Trident:
		TVGA8800CS,  TVGA8900B,	 TVGA8900C,   TVGA8900CL,
		TVGA9000

	    Cirrus:
		CL6410, CL6412, CL6420, CL6440

	    Oak:
		OTI067, OTI077, OTI087

       Additionally it supports generic VGA cards.

       XF86_VGA16  does	 not support the accelerated functions of
       the supported chipsets.

OPTIONS
       In addition to the normal server options described in  the
       Xserver(1)  manual page, XF86_VGA16 accepts some more com-
       mand line switches, as described in  the	 XFree86(1)  man-
       page.

SETUP
       XFree86	uses  a	 configuration file called XF86Config for
       its initial setup.  See the  XF86Config(4/5)  manpage  for
       general	details.  Here only the XF86_VGA16 specific parts
       are explained.

       The Driver entry in the Screen section of  the  XF86Config



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XF86_VGA16(1)					    XF86_VGA16(1)


       file  should  be set to vga16.  To run in dual-headed con-
       figuration, there should also be a Screen section with the
       Driver entry set to mono.

       Entries	for  the  Device  section  in the XF86Config file
       include:

       chipset "name"
	       specifies a chipset so the correct driver  can  be
	       used.  Possible chipsets are:


		      ATI:
			  vgawonder

		      Tseng:
			  et4000,      et4000w32,     et4000w32i,
			  et4000w32p

		      Trident:
			  tvga8800cs,	 tvga8900b,    tvga8900c,
			  tvga8900cl, tvga9000

		      Cirrus:
			  cl6410, cl6412, cl6420, cl6440

		      Oak:
			  oti067, oti077, oti087

		      Generic VGA:
			  generic

       Option "optionstring"
	       allows the user to select certain options provided
	       by the drivers.	Currently the  following  strings
	       are recognized:

	       legend  -  for  Sigma  Legend ET4000-based boards.
	       This  option  enables  a	 special  clock-selection
	       algorithm used on Legend boards, and MUST be spec-
	       ified for these boards to function correctly.

	       hibit_low, hibit_high - for Tseng ET4000 chipsets.
	       With  some ET4000 cards, the server has difficulty
	       getting the state of the high-order clocks  select
	       bit right when started from a high-resolution text
	       mode.  These options  allow  the	 correct  initial
	       state  of  that	bit to be specified.  To find out
	       what the	 correct  initial  state  is,  start  the
	       server  from  an	 80x25 text mode.  This option is
	       only needed if the clocks reported by  the  server
	       when started from a high-resolution text mode dif-
	       fer from those reported when it is started from an
	       80x25 text mode.



XFree86			  Version 3.1.1				2





XF86_VGA16(1)					    XF86_VGA16(1)


       Note that XFree86 has some internal capabilities to deter-
       mine what hardware it is running	 on.  Thus  normally  the
       keywords	 chipset,  clocks,  and videoram don't have to be
       specified.  But there may be occasions when  this  autode-
       tection mechanism fails, (for example, too high of load on
       the machine when you start the server).	 For  cases  like
       this,  one  should  first  run  XF86_VGA16  on an unloaded
       machine, look at the results of	the  autodetection  (that
       are printed out during server startup) and then explicitly
       specify these parameters in the configuration file.  It is
       recommended  that all parameters, especially Clock values,
       be specified in the XF86Config file.

FILES
       <XRoot>/bin/XF86_VGA16	     The 16 colour X server

       /etc/XF86Config		     Server configuration file

       <XRoot>/lib/X11/XF86Config    Server configuration file

       Note: <XRoot> refers to the root of the X11 install  tree.

SEE ALSO
       X(1),	 Xserver(1),	 XFree86(1),	 XF86Config(4/5),
       XF86_Mono(1), xf86config(1), xdm(1), xinit(1)

CONTACT INFO
       XFree86	source	is  available	from   the   FTP   server
       ftp.XFree86.org.	  Send	email  to XFree86@XFree86.org for
       details.

AUTHORS
       The primary developer of this server is

       Gertjan Akkerman,  akkerman@dutiba.twi.tudelft.nl

       See also the XFree86(1) manual page.




















XFree86			  Version 3.1.1				3


