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VOODOO(4)                  Kernel Interfaces Manual                  VOODOO(4)

       voodoo - Voodoo video driver

       Section "Device"
         Identifier "devname"
         Driver "voodoo"

       voodoo  is  an  Xorg  driver  for  Voodoo  1  and Voodoo 2 series video
       adapters.  On the Voodoo 1 the driver uses a shadow  buffer  in  system
       memory as the video adapter has only 3D acceleration. Selected portions
       of the shadow framebuffer are copied out to the  Voodoo  board  at  the
       right  time. Because of this, the speed of the driver is very dependent
       on the CPU. Processors nowadays are actually rather fast at moving data
       so we get very good speed anyway as the shadow framebuffer is in cached

       The Voodoo2 has 16bpp acceleration and the driver provides  accelerated
       versions  of most operations except angled lines and stipples. Acceler-
       ated alpha blending with the Render extension is also supported  as  is

       This driver supports 16bpp modes currently. The video hardware supports
       image conversion from 24bpp to 16bpp but the hardware is 16bpp only.

       The Voodoo 1 series cards can go up to  800x600  resolution  while  the
       Voodoo 2 can reach 1024x768 providing it has at least 2Mb of frame buf-
       fer memory. 1024x768 2D mode does not require two cards  configured  in
       scan-line interleave mode (SLI).

       Multihead and Xinerama configurations are supported. SLI configurations
       will be treated as multiple video cards.

       Limited support for DPMS screen saving is available. The "standby"  and
       "suspend"  modes  are  just  painting  the screen black. The "off" mode
       turns the Voodoo board off and thus works correctly.

       This driver does not support a virtual screen size different  from  the
       display  size.  This is a hardware limitation. 3D rendering is also not

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

       The following driver Options are supported:

       Option "ShadowFB" "boolean"
              Enables a shadow buffer in main memory. This turns off accelera-
              tion but for otherwise unaccelerated operations can improve per-
              formance materially.  Default: off for voodoo2, on for voodoo1.

       Option "NoAccel" "boolean"
              Disables  acceleration  if  set.  Unless  debugging  this option
              should only be set if ShadowFB is  enabled.   Default:  off  for
              voodoo2, on for voodoo1.

       The  driver interacts badly with the sstfb frame buffer driver as there
       is insufficient information to restore the chip to its previous state.

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

       Authors: Alan Cox, Ghozlane Toumi, Henrik Harmsen.

X Version 11                xf86-video-voodoo 1.2.0                  VOODOO(4)