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s3virge(4x)							   s3virge(4x)

NAME
       s3virge - S3 ViRGE video	driver

SYNOPSIS
       Section "Device"
	 Identifier "devname"
	 Driver	"s3virge"
	 ...
	 [ Option "optionname" ["optionvalue"]]
       EndSection

DESCRIPTION
       s3virge	is  an	Xorg  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.  XVideo hard-
       ware up scaling is supported in depth 16	and 24 on the DX, GX, GX2, MX,
       MX+, and	Trio3D/2X.  Doublescan modes are supported and tested in depth
       8 and 16	on DX, but disable XVideo.  Doublescan modes on	other chipsets
       are untested.

SUPPORTED HARDWARE
       The s3virge driver supports PCI and AGP video cards based on  the  fol-
       lowing 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 xorg.conf(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  following  ChipSet
       names  may  optionally  be specified in the config file ""Device"" sec-
       tion, 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: 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 set-
	      tings as your video card defaults, and using neither in the con-
	      fig 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" "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 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 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_conservative"
	      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 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_conser-
	      vative  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 supported:

       Option "pci_burst" ["boolean"]
	      will enable PCI burst mode. This should work on all  but	a  few
	      broken  PCI  chipsets,  and will increase	performance.  Default:
	      off.

       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 send-
	      ing 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.  Default: off.

       Option "mx_cr3a_fix" ["boolean"]
	      Enable or	disable	a cr3a fix added for ViRGE MX.	Default: on.

SEE ALSO
       Xorg(1),	xorg.conf(5), Xserver(1), X(7)

KNOWN BUGS
       The  VideoRam  generic  driver  parameter  is  presently	ignored	by the
       s3virge driver.	On PPC this is	reported  to  cause  problems  for  2M
       cards, because they may autodetect as 4M.

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.

X Version 11		   xf86-video-s3virge 1.10.7		   s3virge(4x)

NAME | SYNOPSIS | DESCRIPTION | SUPPORTED HARDWARE | CONFIGURATION DETAILS | SEE ALSO | KNOWN BUGS | SUPPORT | AUTHORS

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