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 color server for VGA cards. The
default root visual for this server is StaticColor. 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,
88800GX-C, 88800GX-D, 88800GX-E, 88800GX-F,
88800CX, 264CT, 264ET, 264VT, 264GT (a.k.a. 3D
Rage), 264VT-B, 264VT3, 264VT4, 264GT-B (a.k.a.
3D Rage II), 264GT-IIc, 264GT3 (a.k.a. 3D Rage
Pro), 264LT, 264LT-Pro
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
XFree86 Version 3.3.5 1
XF86_VGA16(1) XF86_VGA16(1)
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
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:
ati (see README.ati for additional
recoginzed names)
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
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XF86_VGA16(1) XF86_VGA16(1)
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.
clkdiv2 - for all chipsets using a set of discrete
clocks (i.e. not using a programmable ClockChip or
a ClockProg). With this option enabled, the VGA
driver can also use all the clocks mentionned in
the clocks line divided by 2, presenting the
server with twice as many clocks to choose from,
especially in the low- and mid-range. This is use
ful for creating very low resolution modes like
320x200, because the lowest available clock on
many cards (25.175 MHz) is too high to create a
standard 320x200 mode. A few VGA chips don't sup
port this option, causing a distorted screen.
power_saver - This option enables the server to
use the power saving features of VESA DPMS compat
ible monitors. The suspend level is currently not
supported. Refer to the XF86Config(4/5) manual
page for details of how to set the timeouts for
the different levels of operation. This option is
experimental.
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), xvidtune(1), xdm(1), xinit(1)
XFree86 Version 3.3.5 3
XF86_VGA16(1) XF86_VGA16(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 3.3.5 4
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