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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
       acceleration 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
       robust 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
              options are XAA and EXA.  XAA is the traditional acceleration
              architecture 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 "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.

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

       Option "ProgramFPRegs" "boolean"
              Enable or disable programming of the flat panel registers.
              Beware 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
              system may hang.

       Option "UseFBDev" "boolean"
              Enable or disable use of an OS-specific framebuffer device
              interface (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 6.10.0                    R128(4x)


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