MirOS Manual: mga(4)


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

NAME

     mga - Matrox video driver

SYNOPSIS

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

DESCRIPTION

     mga is an XFree86 driver for Matrox video cards.  The driver
     is fully accelerated, and provides support for the following
     framebuffer depths: 8, 15, 16, 24, and an 8+24 overlay mode.
     All visual types are supported for depth 8, and both
     TrueColor and DirectColor visuals are supported for the
     other depths except 8+24 mode which supports PseudoColor,
     GrayScale and TrueColor.  Multi-card configurations are sup-
     ported.  XVideo is supported on G200 and newer systems, with
     either TexturedVideo or video overlay.  The second head of
     dual-head cards is supported for the G450 and G550.  Support
     for the second head on G400 cards requires a binary-only
     "mga_hal" module that is available from Matrox
     <http://www.matrox.com>, and may be on the CD supplied with
     the card. That module also provides various other enhance-
     ments, and may be necessary to use the DVI (digital) output
     on the G550 (and other cards).

SUPPORTED HARDWARE

     The mga driver supports PCI and AGP video cards based on the
     following Matrox chips:

     MGA2064W    Millennium (original)

     MGA1064SG   Mystique

     MGA2164W    Millennium II

     G100

     G200        Millennium G200 and Mystique G200

     G400

     G450

     G550

CONFIGURATION DETAILS

     Please refer to XF86Config(5) for general configuration
     details.  This section only covers configuration details
     specific to this driver.

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     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:

         "mga2064w", "mga1064sg", "mga2164w", "mga2164w agp",
         "mgag100", "mgag200", "mgag200 pci", "mgag400",
         "mgag550".

     The G450 is Chipset "mgag400" with ChipRev 0x80.

     The driver will auto-detect the amount of video memory
     present for all chips except the Millennium II.  In the Mil-
     lennium II case it defaults to 4096 kBytes.  When using a
     Millennium II, 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 "ColorKey" "integer"
          Set the colormap index used for the transparency key
          for the depth 8 plane when operating in 8+24 overlay
          mode.  The value must be in the range 2-255.  Default:
          255.

     Option "HWCursor" "boolean"
          Enable or disable the HW cursor.  Default: on.

     Option "MGASDRAM" "boolean"
          Specify whether G100, G200 or G400 cards have SDRAM.
          The driver attempts to auto-detect this based on the
          card's PCI subsystem ID.  This option may be used to
          override that auto-detection.  The mga driver is not
          able to auto-detect the presence of of SDRAM on secon-
          dary heads in multihead configurations so this option
          will often need to be specified in multihead configura-
          tions. Default: auto-detected.

     Option "NoAccel" "boolean"
          Disable or enable acceleration.  Default: acceleration
          is enabled.

     Option "NoHal" "boolean"
          Disable or enable loading the "mga_hal" module.
          Default: the module is loaded when available and when
          using hardware that it supports.

     Option "OverclockMem"
          Set clocks to values used by some commercial X-Servers
          (G100, G200 and G400 only).  Default: off.

     Option "Overlay" "value"

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          Enable 8+24 overlay mode.  Only appropriate for depth
          24. Recognized values are: "8,24", "24,8". Default:
          off. (Note: the G100 is unaccelerated in the 8+24 over-
          lay mode due to a missing hardware feature.)

     Option "PciRetry" "boolean"
          Enable or disable PCI retries.  Default: off.

     Option "Rotate" "CW"

     Option "Rotate" "CCW"
          Rotate the display clockwise or counterclockwise.  This
          mode is unaccelerated. Default: no rotation.

     Option "ShadowFB" "boolean"
          Enable or disable use of the shadow framebuffer layer.
          Default: off.

     Option "SyncOnGreen" "boolean"
          Enable or disable combining the sync signals with the
          green signal. Default: off.

     Option "UseFBDev" "boolean"
          Enable or disable use of on OS-specific fb interface
          (and is not supported on all OSs).  See fbdevhw(4) for
          further information. Default: off.

     Option "VideoKey" "integer"
          This sets the default pixel value for the YUV video
          overlay key. Default: undefined.

     Option "TexturedVideo" "boolean"
          This has XvImage support use the texture engine rather
          than the video overlay. This option is only supported
          by the G200 and G400, and only in 16 and 32 bits per
          pixel. Default: off.

SEE ALSO

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

AUTHORS

     Authors include: Radoslaw Kapitan, Mark Vojkovich, and also
     David Dawes, Guy Desbief, Dirk Hohndel, Doug Merritt, Andrew
     E. Mileski, Andrew van der Stock, Leonard N. Zubkoff, Andrew
     C. Aitchison.

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