MirOS Manual: rendition(4)


RENDITION(4)        UNIX Programmer's Manual         RENDITION(4)

NAME

     rendition - Rendition video driver

SYNOPSIS

     Section "Device"
       Identifier "devname"
       Driver "rendition"
       ...
     EndSection

DESCRIPTION

     rendition is an XFree86 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.

SUPPORTED HARDWARE

     The rendition driver supports PCI and AGP video cards based
     on the following 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.

CONFIGURATION DETAILS

     Please refer to XF86Config(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"

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          Increases the Mem/Sys clock to 125MHz/60MHz from stan-
          dard 110MHz/50MHz. Default: Not overclocked.

     Option "DacSpeed" "MHz"
          Run the memory at a higher clock. Useful on some cards
          with display 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 writecombined access to the framebuffer.
          This can drastically increase the performance on unac-
          celerated server. Requires that "MTRR"-support is com-
          piled into the OS-kernel. Default: Disabled for V1000,
          enabled for V2100/V2200.

     Option "NoDDC" "boolean"
          Disable probing of DDC-information from your monitor.
          This information is not used yet and is only there for
          informational purposes. This might change before final
          XFree86 4.0 release. Safe to disable if you experience
          problems during startup of X-server. 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 system 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 systems where read-
          ing 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 enabled. 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.

     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.

SEE ALSO

     XFree86(1), XF86Config(5), xf86config(1), Xserver(1), X(7)

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AUTHORS

     Authors include: Marc Langenbach, Dejan Ilic

XFree86                   Version 4.5.0                         3

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