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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 "Dac6Bit"	"boolean"
	      Enables  or  disables the	use of 6 bits per color	component when
	      in 8 bpp mode (emulates VGA mode).  By default, all 8  bits  per
	      color component are used.	 The default is	off.

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

       Option "Display"	"string"
	      Select display mode for devices which support flat panels.  Sup-
	      ported modes are:

	      "FP" - use flat panel;

	      "CRT" - use cathode ray tube;

	      "Mirror" - use both FP and CRT;

	      "BIOS" - use mode	as configured in the BIOS.

	      The default is FP.

       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), xorgconfig(1), Xserver(1), X(7)

       Rickard E. (Rik)	Faith
       Kevin E.	Martin

X Version 11		     xf86-video-r128 6.8.0		      R128(4x)


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