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RENDITION(4)		   Kernel Interfaces Manual		  RENDITION(4)

       rendition - Rendition video driver

       Section "Device"
	 Identifier "devname"
	 Driver	"rendition"

       rendition  is  an  Xorg	driver for Rendition/Micron based video	cards.
       The driver supports following framebuffer depths: 8, 15	(Verite	 V1000
       only),  16  and	24. Acceleration and multi-head	configurations are not
       supported yet, but are work in progress.

       The rendition driver supports PCI and AGP video cards based on the fol-
       lowing Rendition/Micron chips:

       V1000	   Verite V1000	based cards.

       V2100	   Verite  V2100  based	 cards.	Diamond	Stealth	II S220	is the
		   only	known such card.

       V2200	   Verite V2200	based cards.

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

       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:

	   "v1000", "v2x00".

       The  driver will	auto-detect the	amount of video	memory present for all
       chips. If the amount of memory  is  detected  incorrectly,  the	actual
       amount of video memory should be	specified with a VideoRam entry	in the
       config file "Device" section.

       The following driver Options are	supported:

       Option "SWCursor" "boolean"
	      Disables use of the hardware cursor. Default: use	HW-cursor.

       Option "OverclockMem" "boolean"
	      Increases	 the  Mem/Sys  clock  to  125MHz/60MHz	from  standard
	      110MHz/50MHz.  Default: Not overclocked.

       Option "DacSpeed" "MHz"
	      Run the memory at	a higher clock.	Useful on some cards with dis-
	      play glitches at higher resolutions. But adds the	risk to	damage
	      the hardware. Use	with caution.

       Option "FramebufferWC" "boolean"
	      If  writecombine is disabled in BIOS, and	you add	this option in
	      configuration file, then the driver will try to  request	write-
	      combined	access	to  the	 framebuffer. This can drastically in-
	      crease the performance on	unaccelerated  server.	Requires  that
	      "MTRR"-support  is  compiled  into the OS-kernel.	 Default: Dis-
	      abled for	V1000, enabled for V2100/V2200.

       Option "NoDDC" "boolean"
	      Disable probing of DDC-information from your monitor.  This  in-
	      formation	 is  not  used yet and is only there for informational
	      purposes.	 Safe to disable if  you  experience  problems	during
	      startup of Xorg.	Default: Probe DDC.

       Option "ShadowFB" "boolean"
	      If  this	option is enabled, the driver will cause the CPU to do
	      each drawing operation first into	a shadow frame buffer in  sys-
	      tem  virtual  memory and then copy the result into video memory.
	      If this option is	not active, the	CPU will  draw	directly  into
	      video memory.  Enabling this option is beneficial	for those sys-
	      tems where reading from video memory is, on average, slower than
	      the  corresponding read/modify/write operation in	system virtual
	      memory.  This is normally	the case for PCI or AGP	adapters, and,
	      so, this option is enabled by default unless acceleration	is en-
	      abled.  Default: Enabled unless acceleration is used.

       Option "Rotate" "CW"

       Option "Rotate" "CCW"
	      Rotate the display clockwise or counterclockwise.	 This mode  is
	      unaccelerated.  Default: no rotation.

       Notes  For  the moment the driver defaults to not request write-combine
	      for any chipset as there has been	indications of	problems  with
	      it.  Use Option "MTRR" to	let the	driver request write-combining
	      of memory	access on the video board.

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

       Authors include:	Marc Langenbach, Dejan Ilic

X.Org				 Version 6.7.0			  RENDITION(4)


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