s3virge(4)
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s3virge(4) XFree86 s3virge(4)
NAME
s3virge - S3 ViRGE video driver
SYNOPSIS
Section "Device"
Identifier "devname"
Driver "s3virge"
...
[ Option "optionname" ["optionvalue"]]
EndSection
DESCRIPTION
s3virge is an XFree86 driver for S3 based video cards.
The driver is fully accelerated, and provides support for
the following framebuffer depths: 8, 15, 16, and 24. All
visual types are supported for depth 8, and TrueColor
visuals are supported for the other depths.
SUPPORTED HARDWARE
The s3virge driver supports PCI and AGP video cards based
on the following S3 chips:
ViRGE 86C325
ViRGE VX 86C988
ViRGE DX 86C375
ViRGE GX 86C385
ViRGE GX2 86C357
ViRGE MX 86C260
ViRGE MX+ 86C280
Trio 3D 86C365
Trio 3D/2X 86C362, 86C368
CONFIGURATION DETAILS
Please refer to XF86Config(5) for general configuration
details. This section only covers configuration details
specific to this driver. All options names are case and
white space insensitive when parsed by the server, for
example, "virge vx" and "VIRGEvx" are equivalent.
The driver auto-detects the chipset type, but the follow
ing ChipSet names may optionally be specified in the con
fig file ""Device"" section, and will override the auto-
detection:
"virge", "86c325", "virge vx", "86c988", "virge dx",
"86c375", "virge gx", "86c385", "virge gx2", "86c357",
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"virge mx", "86c260", "virge mx+", "86c280", "trio
3d", "86c365", "trio 3d/2x", "86c362", "86c368".
The following Cursor Options are supported:
Option "HWCursor" ["boolean"]
Enable or disable the HW cursor. Default: on.
Option "SWCursor" ["boolean"]
Inverse of "HWCursor". Default: off.
The following display Options are supported:
Option "ShadowFB" ["boolean"]
Use shadow framebuffer. Disables HW acceleration.
Default: off.
Option "Rotate" "cw | ccw"
Rotate the screen CW - clockwise or CCW - counter
clockwise. Disables HW Acceleration and HW Cursor,
uses ShadowFB. Default: no rotation.
Option "XVideo" ["boolean"]
Disable XVideo support by using the off option.
This changes FIFO settings which prevent screen
noise for high-res modes. Default: on
The following video memory Options are supported:
Option "slow_edodram"
Switch the standard ViRGE to 2-cycle edo mode. Try
this if you encounter pixel corruption on the
ViRGE. Using this option will cause a large
decrease in performance. Default: off.
Option "fpm_vram"
Switch the ViRGE/VX to fast page mode vram mode.
Default: off.
Option "slow_dram | fast_dram"
Change Trio 3D and 3D/2X memory options. Default:
Use BIOS defaults.
Option "early_ras_precharge | late_ras_precharge"
adjust memory parameters. One of these will us the
same settings as your video card defaults, and
using neither in the config file does the same.
Default: none.
Option "set_mclk" "integer"
sets the memory clock, where integer is in kHz, and
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integer <= 100000. Default: probe the memory clock
value, and use it at server start.
Option "set_refclk" "integer"
sets the ref clock for ViRGE MX, where integer is
in kHz. Default: probe the memory clock value, and
use it at server start.
The following acceleration and graphics engine Options are
supported:
Option "NoAccel"
Disable acceleration. Very useful for determining
if the driver has problems with drawing and accel
eration routines. This is the first option to try
if your server runs but you see graphic corruption
on the screen. Using it decreases performance, as
it uses software emulation for drawing operations
the video driver can accelerate with hardware.
Default: acceleration is enabled.
Option "UseFB"
There are two framebuffer rendering methods. fb
and cfb. Both are available in the driver. fb is
the newer and default method. To switch back to
cfb use this option with no, off or other negative
parameter. Default: on.
Option "fifo_aggressive | fifo_moderate | fifo_conserva
tive"
alter the settings for the threshold at which the
pixel FIFO takes over the internal memory bus to
refill itself. The smaller this threshold, the bet
ter the acceleration performance of the card. You
may try the fastest setting (fifo_aggressive) and
move down if you encounter pixel corruption. The
optimal setting will probably depend on dot-clock
and on color depth. Note that specifying any of
these options will also alter other memory settings
which may increase performance, so trying fifo_con
servative will in most cases be a slight benefit
(this uses the chip defaults). If pixel corruption
or transient streaking is observed during drawing
operations then removing any fifo options is recom
mended. Default: none.
The following PCI bus Options are supported:
Option "pci_burst" ["boolean"]
will enable PCI burst mode. This should work on all
but a few broken PCI chipsets, and will increase
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performance. Default: off.
Option "pci_retry" ["boolean"]
will allow the driver to rely on PCI Retry to pro
gram the ViRGE registers. pci_burst must be
enabled for this to work. This will increase per
formance, especially for small fills/blits, because
the driver does not have to poll the ViRGE before
sending it commands to make sure it is ready. It
should work on most recent PCI chipsets. Default:
off.
The following ViRGE MX LCD Options are supported:
Option "lcd_center"
Option "set_lcdclk" "integer"
allows setting the clock for a ViRGE MX LCD dis
play. integer is in Hz. Default: use probed
value.
The following additional Options are supported:
Option "ShowCache" ["boolean"]
Enable or disable viewing offscreen cache memory.
A development debug option. Default: off.
Option "mx_cr3a_fix" ["boolean"]
Enable or disable a cr3a fix added for ViRGE MX.
Default: on.
SEE ALSO
XFree86(1), XF86Config(5), xf86config(1), Xserver(1), X(7)
SUPPORT
For assistance with this driver, or XFree86 in general,
check the XFree86 web site at http://www.xfree86.org. A
FAQ is available on the web site at
http://www.xfree86.org/FAQ/. If you find a problem with
XFree86 or have a question not answered in the FAQ please
use our bug report form available on the web site or send
mail to XFree86@XFree86.org. When reporting problems with
the driver send as much detail as possible, including
chipset type, a server output log, and operating system
specifics.
AUTHORS
Kevin Brosius, Matt Grossman, Harald Koenig, Sebastien
Marineau, Mark Vojkovich.
4.2.1 Version 4
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