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SIS(4x)								       SIS(4x)

       sis - SiS and XGI video driver

       Section "Device"
	 Identifier "devname"
	 Driver	"sis"

       sis  is	an  Xorg  driver  for SiS (Silicon Integrated Systems) and XGI
       video chips. The	driver is accelerated and provides  support  for  col-
       ordepths	 of  8,	16 and 24 bpp. XVideo, Render and other	extensions are
       supported as well.

       The sis driver supports PCI, AGP	and PCIe video cards based on the fol-
       lowing chipsets:

       SiS5597/5598  SiS530/620	 SiS6326/AGP/DVD  SiS300/305 SiS540 SiS630/730
       SiS315/E/H/PRO	SiS550/551/552	 SiS650/651/661/741   SiS330   (Xabre)
       SiS760/761 XGI Volari V3/V5/V8 XGI Volari Z7

       In the following	text, the following terms are used:

       old series for SiS5597/5598, 530/620 and	6326/AGP/DVD

       300 series for SiS300/305, 540 and 630/730

       315/330/340  series  for	SiS315,	55x, 330, 661/741/76x (plus M, FX, MX,
       GX variants thereof), 340 and all XGI chips.

       Please refer to xorg.conf(5) for	general	configuration  details.	  This
       section only covers configuration details specific to this driver.

       Detailed	 information  on  all  supported  options  can	be obtained at

       This manpage only covers	a subset of the	supported options.

       1. For all supported chipsets

       The following driver options are	supported on all chipsets:

       Option "NoAccel"	"boolean"
	      Disable or enable	2D acceleration. Default: acceleration is  en-

       Option "HWCursor" "boolean"
	      Enable or	disable	the HW cursor. Default:	HWCursor is on.

       Option "SWCursor" "boolean"
	      The opposite of HWCursor.	Default: SWCursor is off.

       Option "Rotate" "string"
	      Rotate   the   display  clockwise	 ("CW")	 or  counter-clockwise
	      ("CCW"). This mode is unaccelerated. Using this option  disables
	      XVideo and the Resize and	Rotate extension (RandR). Rotation and
	      reflection (see below) are mutually exclusive.  Default: no  ro-

       Option "Reflect"	"string"
	      Reflect  (mirror)	 the  display  horizontally  ("X"), vertically
	      ("Y") or both ("XY"). This mode is unaccelerated.	Using this op-
	      tion  disables  XVideo  and  the	Resize	and  Rotate  extension
	      (RandR). Rotation	(see above) and	reflection are mutually	exclu-
	      sive.  Default: no reflection.

       Option "CRT1Gamma" "boolean"
	      Enable  or disable gamma correction. (On the 300 and 315/330/340
	      series, this option only affects CRT1 output).   Default:	 Gamma
	      correction is enabled.

       2. Old series specific information

       The  driver will	auto-detect the	amount of video	memory present for all
       these chips, but	in the case of the 6326, it will limit the memory size
       to  4MB.	This is	because	the 6326's 2D engine can only address 4MB. The
       remaining memory	seems to be intended for 3D texture data,  since  only
       the 3D engine can address RAM above 4MB.	However, you can override this
       limitation using	the "VideoRAM" option in the Device  section  if  your
       board  has  more	than 4MB and you need to use it. However, 2D accelera-
       tion, XVideo and	the HWCursor will be disabled in this case.

       For the 6326, the driver	has two	built-in modes	for  high  resolutions
       which  you  should  use	instead	 of  the default ones. These are named
       "SIS1280x1024-75" and "SIS1600x1200-60" and they	will be	added  to  the
       list  of	 default  modes.  To  use these	modes, just place them in your
       Screen section. Example:

       Modes "SIS1600x1200-60" "SIS1280x1024x75" "1024x768" ...

       Of these	modes, 1280x1024  is  only  available  at  8,  15  and	16bpp.
       1600x1200 is available at 8bpp only.

       TV support for the 6326

       TV output is supported for the 6326. The	driver will auto detect	a con-
       nected TV and in	this case add the following display modes to the  list
       of  available display modes: "PAL800x600", "PAL800x600U", "PAL720x540",
       "PAL640x480", "NTSC640x480",  "NTSC640x480U"  and  "NTSC640x400".   Use
       these modes like	the hi-res modes described above.

       The following driver Options are	supported on the old series:

       Option "TurboQueue" "boolean"
	      Enable or	disable	TurboQueue mode.  Default: off for SIS530/620,
	      on for the others

       Option "FastVram" "boolean"
	      Enable or	disable	FastVram mode.	Enabling this sets  the	 video
	      RAM  timing  to  one cycle per read operation instead of two cy-
	      cles. Disabling this will	set two	cycles for read	and write  op-
	      erations.	Leaving	this option out	uses the default, which	varies
	      depending	on the chipset.

       Option "NoHostBus" "boolean"
	      (SiS5597/5598 only). Disable CPU-to-VGA host bus	support.  This
	      speeds  up  CPU to video RAM transfers. Default: Host bus	is en-

       Option "NoXVideo" "boolean"
	      Disable XV (XVideo) extension support. Default: XVideo is	on.

       Option "NoYV12" "boolean"
	      Disable YV12 Xv support. This might me required due to  hardware
	      bugs  in	some  chipsets.	Disabling YV12 support forces Xv-aware
	      applications to use YUV2 or XShm	for  video  output.   Default:
	      YV12 support is on.

       Option "TVStandard" "string"
	      (6326  only)  Valid  parameters are PAL or NTSC.	The default is
	      set by a jumper on the card.

       Option "TVXPosOffset" "integer"
	      (6326 only) This option allows tuning the	horizontal position of
	      the image	for TV output. The range is from -16 to	16. Default: 0

       Option "TVYPosOffset" "integer"
	      (6326  only)  This option	allows tuning the vertical position of
	      the image	for TV output. The range is from -16 to	16. Default: 0

       Option "SIS6326TVEnableYFilter" "boolean"
	      (6326 only) This option allows enabling/disabling	the Y (chroma)
	      filter for TV output.

       Option "SIS6326TVAntiFlicker" "string"
	      (6326  only)  This  option  allow	 enabling/disabling  the  anti
	      flicker facility for TV output.  Possible	 parameters  are  OFF,
	      LOW,  MED, HIGH or ADAPTIVE.  By experience, ADAPTIVE yields the
	      best results, hence it is	the default.

       2. 300 and 315/330/340 series specific information

       The 300 and 315/330/340 series, except the XGI Z7, feature two CRT con-
       trollers	 and  very  often come with a video bridge for controlling LCD
       and TV output. Hereinafter, the term CRT1 refers	to the VGA  output  of
       the  chip,  and	CRT2 refers to either LCD, TV or secondary VGA.	Due to
       timing reasons, only one	CRT2 output can	be active at  the  same	 time.
       But  this  limitation does not apply to using CRT1 and CRT2 at the same
       time which makes	it possible to run the driver in dual head mode.

       The driver supports the following video bridges:

       SiS301 SiS301B(-DH) SiS301C SiS301LV SiS302(E)LV

       Instead of a video bridge, some machines	have a third party LVDS	trans-
       mitter  to  control  LCD	 panels, and/or	a Chrontel 7005	or 7019	for TV
       output. All these are supported as well.

       About TV	output

       The driver fully	supports standard (PAL,	NTSC, PAL-N, PAL-M) S-video or
       composite  output as well as high definition TV (HDTV) output via YPbPr
       plugs.  For more	information on HDTV, please consult the	author's  web-

       As  regards  S-video  and CVBS output, the SiS301 and the Chrontel 7005
       only support resolutions	up to 800x600. All others support  resolutions
       up  to  1024x768.  However, due to a hardware bug, Xvideo might be dis-
       torted on SiS video bridges if running NTSC or PAL-M at 1024x768.

       About XVideo support

       XVideo is supported on all chipsets of both families  (except  the  XGI
       Volari  Z7  which  lacks	hardware support for video overlays). However,
       there are some differences in hardware  features	 which	cause  limita-
       tions.  The 300 series as well as the SiS55x, M650, 651,	661FX, M661FX,
       M661MX, 741, 741GX, M741, 76x, M76x support  two	 video	overlays.  The
       SiS315/H/PRO,  650/740, 330, 340	and the	XGI Volari V3, V5 and V8 chips
       support only one	such overlay. On chips with two	overlays, one  overlay
       is used for CRT1, the other for CRT2. On	the other chipsets, the	option
       "XvOnCRT2" can be used to select	the desired  output  device  (CRT1  or

       About Merged Framebuffer	support

       Merged  framebuffer mode	is similar to dual head/Xinerama mode (for us-
       ing two output devices of one card at the same time), but has a few ad-
       vantages	 which make me recommend it strongly over Xinerama. Please see for	detailed information.

       About dual-head support

       Dual head mode with or without Xinerama is fully	supported, be it  with
       one  card  driving two outputs, be it two cards.	Note that colordepth 8
       is not supported	in dual	head mode if run on one	card with two outputs.

       The following driver Options are	supported on the 300  and  315/330/340

       Option "NoXVideo" "boolean"
	      Disable XV (XVideo) extension support.  Default: XVideo is on.

       Option "XvOnCRT2" "boolean"
	      On chipsets with only one	video overlay, this option can used to
	      bind the overlay to CRT1 ( if a monitor is detected and if  this
	      option is	either unset or	set to false ) or CRT2 ( if a CRT2 de-
	      vice is detected or forced, and if this option is	set to true ).
	      If  either only CRT1 or CRT2 is detected,	the driver decides au-
	      tomatically. In Merged Framebuffer mode, this option is ignored.
	      Default: overlay is used on CRT1

       Option "ForceCRT1" "boolean"
	      Force  CRT1  to be on of off. If a monitor is connected, it will
	      be detected during server	start. However,	some old monitors  are
	      not  detected  correctly.	In such	cases, you may set this	option
	      to on in order to	make the driver	initialize  CRT1  anyway.   If
	      this  option  is	set  to	off , the driver will switch off CRT1.
	      Default: auto-detect

       Option "ForceCRT2Type" "string"
	      Force display type to one	of: NONE , TV ,	SVIDEO ,  COMPOSITE  ,
	      SVIDEO+COMPOSITE	,  SCART , LCD , VGA ; NONE will disable CRT2.
	      for  SiS	video bridges only and can be used to force the	driver
	      to use a specific	TV output connector (if	present). For  further
	      parameters, see the author's website.  Default: auto detect.

       Option "CRT2Gamma" "boolean"
	      Enable  or disable gamma correction for CRT2. Only supported for
	      SiS video	bridges. Default: Gamma	correction for CRT2 is on.

       Option "TVStandard" "string"
	      Force the	TV standard to either PAL or NTSC.  On	some  machines
	      with  630, 730 and the 315/330/340 series, PALM ,	PALN and NTSCJ
	      are supported as well. Default: BIOS setting.

       Option "TVXPosOffset" "integer"
	      This option allows tuning	the horizontal position	of  the	 image
	      for TV output. The range is from -32 to 32. Not supported	on the
	      Chrontel 7019. Default: 0

       Option "TVYPosOffset" "integer"
	      This option allows tuning	the vertical position of the image for
	      TV  output.  The	range  is from -32 to 32. Not supported	on the
	      Chrontel 7019. Default: 0

       Option "SISTVXScale" "integer"
	      This option selects the horizontal zooming level for TV  output.
	      The  range  is  from  -16	 to  16.  Only	supported on SiS video
	      bridges. Default:	0

       Option "SISTVYScale" "integer"
	      This option selects the vertical zooming level for TV output  in
	      the  following  modes:  640x480, 800x600.	On the 315/330/340 se-
	      ries, also 720x480, 720x576 and 768x576. The range is from -4 to
	      3. Only supported	on SiS video bridges. Default: 0

       Option "CHTVOverscan" "boolean"
	      On  machines  with  a  Chrontel  TV encoder, this	can be used to
	      force the	TV mode	to overscan or underscan.  on means  overscan,
	      off means	underscan.  Default: BIOS setting.

       Option "CHTVSuperOverscan" "boolean"
	      On machines with a Chrontel 7005 TV encoder, this	option enables
	      a	super-overscan mode. This is only supported if the TV standard
	      is  PAL. Super overscan will produce an image on the TV which is
	      larger than the viewable area.

       The driver supports many	more  options.	Please	see  http://www.winis- for	more information.

       3. 300 series specific information

       DRI  is	supported  on  the  300	series only. On	Linux, prior to	kernel
       2.6.3, DRI requires the kernel's	SiS framebuffer	driver ( sisfb ).  The
       SiS DRM kernel driver as	well as	the SiS	DRI client driver are required
       in any case.

       Sisfb, if installed and running,	takes care of  memory  management  for
       texture data. In	order to prevent the X Server and sisfb	from overwrit-
       ing each	other's	data, sisfb reserves an	amount of video	memory for the
       X driver.  This amount can either be selected using sisfb's mem parame-
       ter, or auto-selected depending on the amount of	total video RAM	avail-

       Sisfb  can  be used for memory management only, or as a complete	frame-
       buffer driver. If you start sisfb with a	valid  mode  (ie  you  gain  a
       graphical console), the X driver	can communicate	with sisfb and doesn't
       require any manual configuration	for finding out	about the video	memory
       it is allowed to	use.

       However,	if you are running a 2.4 series	Linux kernel and use sisfb for
       video memory management only, ie	you started sisfb with	mode=none  and
       still have a text mode console, there is	no communication between sisfb
       and the X driver. For this purpose, the

       Option "MaxXFBMem" "integer"

       exists. This option must	be set to the same value  as  given  to	 sisfb
       through	its  "mem"  parameter, ie the amount of	memory to use for X in

       If you started sisfb without the	mem argument, sisfb will reserve

       12288KB if more than 16MB of total video	RAM is available,

       8192KB if between 12 and	16MB of	video RAM is available,

       4096KB in all other cases.

       If you intend to	use DRI	on an integrated chipset (540,	630,  730),  I
       recommend  setting  the total video memory in the BIOS setup utility to

       PLEASE NOTE: As of Linux	2.6.3 and under	*BSD, sisfb  is	 not  required
       for  memory management. Hence, this option is mandatory on such systems
       not running sisfb to decide how much memory X should reserve  for  DRI.
       If the option is	omitted, DRI will have no memory assigned, and all DRI
       applications will quit with errors like "failed to  allocate  Z-buffer"
       or the like.

       Option "DRI" "boolean"
	      This option allows enabling or disabling DRI. By default,	DRI is

       Option "AGPSize"	"integer"
	      This option allows selecting the amount of AGP memory to be used
	      for DRI.	The amount is to be specified in megabyte, the default
	      is 8.


       Xorg(1),	xorg.conf(5), Xserver(1), X(7) for	more  information  and

       Author:	Thomas Winischhofer. Formerly based on code by Alan Hourihane,
       Mike Chapman, Juanjo Santamarta,	Mitani Hiroshi,	 David	Thomas,	 Sung-
       Ching Lin, Ademar Reis.

X Version 11		     xf86-video-sis 0.12.0		       SIS(4x)


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