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- Information for Rendition Users
-
- The XFree86 Project Inc.
-
- 12 December 1999
-
- 1. Supported hardware
-
- All cards based on the V1000 or the V2x00 should be supported. The server was
- tested on a miroCRYSTAL VRX (V1000), Intergraph Intense-100 3D (V1000), Dia-
- mond Stealth II S220 (V2100), Hercules Thriller3D (V2200), Innovision War-
- rior3D (V2200) and Genoa V-Raptor (v2200).
-
- 2. Limitations
-
- V1000 cards can only work as primary display card due to hardware limita-
- tions.
-
- V2x00 cards can work even if not primary, but primary display card will be
- disabled when server is run. This is a driver limitation.
-
- Hopefully these limitations will be workaround and fixed before final XFree86
- 4.0 release.
-
- 3. Important notices
-
- Some V1000-based video cards are known to lock up the computer if you have
- write-combine activated. Disabling it removes the problem. Look for settings
- in the motherboards BIOS and disable ALL settings that has to do with write-
- combine (usually called USWC or just WC for short).
-
- 15 bits per pixel is only supported on V1000-based cards due to hardware lim-
- itations on V2x00 chipsets.
-
- If you have problems with hardware cursor use the "sw_cursor" option to
- revert back to software cursor.
-
- 4. Features
-
- o Hardware acceleration
-
- o Hardware cursor
-
- o Supported color depths
-
- o 8 bits per pixel (256 pseudo colour)
-
- o 15 bits per pixel (actually 16-bits with RGB-weight 555, 32768 col-
- ors)
-
- o 16 bits per pixel (high colour, RGB-weight 565, 65536 colors)
-
- o 32 bits per pixel (true colour, sparse 24bit, 16M colors)
-
- 5. XF86Config Option
-
- Option "sw_cursor"
- Disables use of the hardware cursor.
-
- Option "overclock_mem"
- Run the memory at a higher clock. Useful on some cards with dis-
- play glitches at higher resolutions. But adds the risk to damage
- the hardware. Use with caution.
-
- DacSpeed "MHz"
- Set custom ramdac limit. We have currently no way of knowing if
- the v2x00 chip is a v2100 (170MHz) or v2200 (203MHz and 230MHz)
- so we assume the lowest. Use this option to manually override the
- value.
-
- Option "FramebufferWC"
- If writecombine is disabled in BIOS, and you add this option in
- in configuration file, then the driver will try to request write-
- combined access to the framebuffer. This can drastically increase
- the performance on unaccelerated server. Requires that
- "MTRR"-support is compiled into the OS-kernel.
-
- Option "NoDDC"
- Disable probing of DDC-information from your monitor. This infor-
- mation is not used yet and is only there for informational pur-
- poses. This might change before final XFree86 4.0 release. Safe
- to disable if you experience problems during startup of X-server.
-
- Option "ShadowFB"
- 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 reading from video memory is, on average, slower than the
- corresponding read/modify/write operation in system virtual mem-
- ory. This is normally the case for PCI or AGP adapters, and, so,
- this option is enabled by default unless acceleration is enabled.
-
- Option "Rotate"
- The option expect a value "CW" for clockwise or "CCW" for coun-
- terclockwise rotation of the screen. This is useful when you need
- more height then width on the screen. Desktop publishing is one
- example where a monitor could display the whole page at once on a
- monitor laying on the side. Notice that this option requires
- "ShadowFB" and automatically enable it. It also disables the
- acceleration. The option is not activated by default.
-
- 6. News in this release
-
- o Acceleration! Disabled for the moment.
-
- 7. Major changes in this release
-
- o ShadowFB support added
-
- o To be determined before final release.
-
- 8. Bugfixes
-
- o 8bpp finally works correctly again
-
- 9. Known problems in current driver
-
- o The acceleration code hangs the computer during X-server startup.
-
- o DDC-probing does not work correctly yet. No DDC information is found.
-
- o Switching from display to VC and back to display can lock up V2x00
- cards.
-
- o When scrolling the virtual display on a V1000 card parts of the screen
- will become distorted. Problem disappears when you continue moving
- around. V2x00 does not exhibit this problem. Probably a bug in the
- driver rather than a limitation of the chip.
-
- 10. Work in progress (not finished in time for release)
-
- o Acceleration is disabled for the moment. If you want to play with it
- enable the "USE_ACCEL" define in rendition.c file! Beware as it has sev-
- eral bugs left to clear out before if is stable for general use.
-
- Generated from XFree86: xc/programs/Xserver/hw/xfree86/doc/sgml/rendition.sgml,v 1.8 2000/03/01 23:54:34 dawes Exp $
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