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cyrix - Cyrix video driver
cyrix is an XFree86 driver for the Cyrix MediaGX (now Natsemi
Geode) series of processors when using the built in video.
cyrix driver supports the MediaGX, MediaGXi and MediaGXm processors, as
well as the Natsemi 'Geode' branded processors. It supports the CS5510, CS5520,
CS5530 and CS5530A companion chips. The driver supports 4, 8, 15 and 16
bit deep displays with video compression and acceleration.
The MediaGX run
length compresses its shared framebuffer, for the best performance on a
MediaGX machine pick backgrounds that compress well horizonally.
Please refer to XF86Config(5)
for general configuration details.
This section only covers configuration details specific to this driver.
The following driver options are supported
- Option "NoAccel" "boolean"
or enable acceleration. Default: acceleration is enabled.
- Option "SWCursor"
- Disable or enable software cursor. Default software cursor is
enabled and a hardware cursor is used.
- Option "HWCursor" "boolean"
or enable hardware cursor. Default hardware cursor is disabled.
- Option "ShadowFB"
- Disable or enable shadow frame buffer. The shadow buffer is normally
only used when rotating the screen. The default is false.
- Option "Rotate"
- Option "Rotate" "CCW"
Rotate the display clockwise or counterclockwise
for use on Cyrix based tablet PC systems. This mode is currently unaccelerated.
This driver has not been tested on the original 5510 hardware for some
8bit mode does not currently work on the CS5510 with
The 5530A video overlay facility is not currently supported.
XFree86 uses the MediaGX 'SoftVGA' interface. On a small number of boards
this is buggy and may result in strange illegal instruction traps.
cursors are not currently supported.
Authors include: Richard Hecker,
Annius Groenink, Dirk Hohndel, The GGI Project, Alan Cox.
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