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- Tridentfb is a framebuffer driver for some Trident chip based cards.
- The following list of chips is thought to be supported although not all are
- tested:
- those from the Image series with Cyber in their names - accelerated
- those with Blade in their names (Blade3D,CyberBlade...) - accelerated
- the newer CyberBladeXP family - nonaccelerated
- Only PCI/AGP based cards are supported, none of the older Tridents.
- How to use it?
- ==============
- When booting you can pass the video parameter.
- video=tridentfb
- The parameters for tridentfb are concatenated with a ':' as in this example.
- video=tridentfb:800x600,bpp=16,noaccel
- The second level parameters that tridentfb understands are:
- noaccel - turns off acceleration (when it doesn't work for your card)
- accel - force text acceleration (for boards which by default are noacceled)
- fp - use flat panel related stuff
- crt - assume monitor is present instead of fp
- center - for flat panels and resolutions smaller than native size center the
- image, otherwise use
- stretch
- memsize - integer value in Kb, use if your card's memory size is misdetected.
- look at the driver output to see what it says when initializing.
- memdiff - integer value in Kb,should be nonzero if your card reports
- more memory than it actually has.For instance mine is 192K less than
- detection says in all three BIOS selectable situations 2M, 4M, 8M.
- Only use if your video memory is taken from main memory hence of
- configurable size.Otherwise use memsize.
- If in some modes which barely fit the memory you see garbage at the bottom
- this might help by not letting change to that mode anymore.
- nativex - the width in pixels of the flat panel.If you know it (usually 1024
- 800 or 1280) and it is not what the driver seems to detect use it.
- bpp - bits per pixel (8,16 or 32)
- mode - a mode name like 800x600 (as described in Documentation/fb/modedb.txt)
- Using insane values for the above parameters will probably result in driver
- misbehaviour so take care(for instance memsize=12345678 or memdiff=23784 or
- nativex=93)
- Contact: jani@astechnix.ro
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