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s3virge - S3 ViRGE video driver
[ Option "optionname" ["optionvalue"]]
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.
The s3virge driver supports PCI and AGP video cards based on the
following S3 chips:
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 exmaple, "virge vx" and "VIRGEvx"
- ViRGE VX
- ViRGE DX
- ViRGE GX2
- ViRGE MX
- ViRGE MX+
- Trio 3D
- Trio 3D/2X
- 86C362, 86C368
The driver auto-detects the chipset type, but the following
ChipSet names may optionally be specified in the config file ""Device""
section, and will override the auto-detection:
"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".
The following Cursor Options are supported:
- Option "HWCursor" ["boolean"]
- Enable or disable the HW cursor. Default:
- Option "SWCursor" ["boolean"]
- Inverse of "HWCursor". Default: off.
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.
following video memory Options are supported:
- Option "slow_edodram"
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.
- 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
- 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 integer <= 100000. Default: probe
the memory clock value, and use it at server start.
- Option "set_refclk"
- sets the ref clock for ViRGE MX, where integer is in kHz. Default:
probe the memory clock value, and use it at server start.
acceleration and graphics engine Options are supported:
- Option "NoAccel"
- Disable acceleration. Very useful for determining if the driver has problems
with drawing and acceleration 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
- Option "fifo_aggressive | fifo_moderate | fifo_conservative"
the settings for the threshold at which the pixel FIFO takes over the internal
memory bus to refill itself. The smaller this threshold, the better 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_conservative 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 recommended. Default: none.
The following PCI bus Options are
- Option "pci_burst" ["boolean"]
- will enable PCI burst mode. This
should work on all but a few broken PCI chipsets, and will increase performance.
- Option "pci_retry" ["boolean"]
- will allow the driver to rely
on PCI Retry to program the ViRGE registers. pci_burst must be enabled
for this to work. This will increase performance, 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 display. 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.
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.
Brosius, Matt Grossman, Harald Koenig, Sebastien Marineau, Mark Vojkovich.
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