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R128(4x)							      R128(4x)

       r128 - ATI Rage 128 video driver

       Section "Device"
	 Identifier "devname"
	 Driver	"r128"

       r128 is an Xorg driver for ATI Rage 128 based video cards.  It contains
       full support for	8, 15, 16 and 24 bit pixel depths, hardware  accelera-
       tion  of	 drawing  primitives,  hardware	 cursor,  video	 modes	up  to
       1800x1440 @ 70Hz, doublescan modes (e.g., 320x200 and  320x240),	 gamma
       correction  at  all pixel depths, a fully programming dot clock and ro-
       bust text mode restoration for VT switching.  Dualhead is supported  on
       M3/M4 mobile chips.

       The  r128  driver supports all ATI Rage 128 based video cards including
       the Rage	Fury AGP 32MB, the XPERT 128 AGP 16MB and  the	XPERT  99  AGP

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

       The driver auto-detects all device information necessary	to  initialize
       the  card.   However, if	you have problems with auto-detection, you can

	   VideoRam - in kilobytes
	   MemBase  - physical address of the linear framebuffer
	   IOBase   - physical address of the MMIO registers
	   ChipID   - PCI DEVICE ID

       In addition, the	following driver Options are supported:

       Option "SWcursor" "boolean"
	      Selects software cursor.	The default is off.

       Option "NoAccel"	"boolean"
	      Enables or disables all hardware acceleration.  The  default  is
	      to enable	hardware acceleration.

       Option "EnablePageFlip" "boolean"
	      Enable  page  flipping  for  3D acceleration. This will increase
	      performance but not work correctly in some rare cases, hence the
	      default is off.

       Option "RenderAccel" "boolean"
	      Enables  or  disables  hardware Render acceleration.  It is only
	      supported	when using EXA acceleration and	DRI.  The  default  is
	      to enable	Render acceleration.

       Option "AccelMethod" "string"
	      Chooses between available	acceleration architectures.  Valid op-
	      tions are	XAA and	EXA.  XAA is the traditional acceleration  ar-
	      chitecture  and  support	for it is very stable.	EXA is a newer
	      acceleration architecture	with better performance	for the	Render
	      and Composite extensions.	 The default is	XAA.

       Option "VideoKey" "integer"
	      This overrides the default pixel value for the YUV video overlay
	      key.  The	default	value is undefined.

       The following Options are mostly	important for non-x86 architectures:

       Option "ProgramFPRegs" "boolean"
	      Enable or	disable	programming of the flat	panel registers.   Be-
	      ware  that  this	may damage your	panel, so use this at your own
	      risk.  The default depends on the	device.

       Option "PanelWidth" "integer"

       Option "PanelHeight" "integer"
	      Override the flat	panel dimensions in pixels. They are  used  to
	      program  the  flat panel registers and normally determined using
	      the video	card BIOS. If the wrong	dimensions are used, the  sys-
	      tem may hang.

       Option "UseFBDev" "boolean"
	      Enable  or  disable use of an OS-specific	framebuffer device in-
	      terface (which is	not supported on all  OSs).   See  fbdevhw(4x)
	      for further information.	Default: on for	PowerPC, off for other

       Option "DMAForXv" "boolean"
	      Try or don't try to use DMA for Xv image	transfers.  This  will
	      reduce  CPU  usage  when	playing	 big videos like DVDs, but may
	      cause instabilities.  Default: off.

       The following additional	Options	are supported:

       Option "ShowCache" "boolean"
	      Enable or	disable	viewing	offscreen cache	memory.	 A development
	      debug option.  Default: off.

       Option "VGAAccess" "boolean"
	      Tell the driver if it can	do legacy VGA IOs to the card. This is
	      necessary	for properly resuming consoles when in VGA text	 mode,
	      but  shouldn't be	if the console is using	radeonfb or some other
	      graphic mode driver. Some	platforms  like	 PowerPC  have	issues
	      with  those,  and	 they  aren't necessary	unless you have	a real
	      text mode	in console. The	default	is off on  PowerPC  and	 SPARC
	      and on on	other architectures.

       Dualhead	 Note: The video BIOS on some laptops interacts	strangely with
       dualhead.  This can result in flickering	and problems changing modes on
       crtc2.	If  you	 experience  these problems try	toggling your laptop's
       video output switch (e.g., fn-f7, etc.) prior to	starting X  or	switch
       to another VT and back.

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

       Rickard E. (Rik)	Faith
       Kevin E.	Martin

X Version 11		    xf86-video-r128 6.12.0		      R128(4x)


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