1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
55 lines
2.0 KiB
Plaintext
55 lines
2.0 KiB
Plaintext
Tridentfb is a framebuffer driver for some Trident chip based cards.
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The following list of chips is thought to be supported although not all are
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tested:
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those from the Image series with Cyber in their names - accelerated
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those with Blade in their names (Blade3D,CyberBlade...) - accelerated
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the newer CyberBladeXP family - nonaccelerated
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Only PCI/AGP based cards are supported, none of the older Tridents.
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How to use it?
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==============
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When booting you can pass the video parameter.
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video=tridentfb
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The parameters for tridentfb are concatenated with a ':' as in this example.
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video=tridentfb:800x600,bpp=16,noaccel
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The second level parameters that tridentfb understands are:
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noaccel - turns off acceleration (when it doesn't work for your card)
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accel - force text acceleration (for boards which by default are noacceled)
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fp - use flat panel related stuff
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crt - assume monitor is present instead of fp
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center - for flat panels and resolutions smaller than native size center the
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image, otherwise use
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stretch
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memsize - integer value in Kb, use if your card's memory size is misdetected.
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look at the driver output to see what it says when initializing.
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memdiff - integer value in Kb,should be nonzero if your card reports
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more memory than it actually has.For instance mine is 192K less than
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detection says in all three BIOS selectable situations 2M, 4M, 8M.
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Only use if your video memory is taken from main memory hence of
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configurable size.Otherwise use memsize.
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If in some modes which barely fit the memory you see garbage at the bottom
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this might help by not letting change to that mode anymore.
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nativex - the width in pixels of the flat panel.If you know it (usually 1024
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800 or 1280) and it is not what the driver seems to detect use it.
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bpp - bits per pixel (8,16 or 32)
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mode - a mode name like 800x600 (as described in Documentation/fb/modedb.txt)
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Using insane values for the above parameters will probably result in driver
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misbehaviour so take care(for instance memsize=12345678 or memdiff=23784 or
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nativex=93)
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Contact: jani@astechnix.ro
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