| 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 |
| tested: |
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| 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 |
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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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| When booting you can pass the video parameter. |
| 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) |
| accel - force text acceleration (for boards which by default are noacceled) |
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| fp - use flat panel related stuff |
| crt - assume monitor is present instead of fp |
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| center - for flat panels and resolutions smaller than native size center the |
| image, otherwise use |
| stretch |
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| 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. |
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| 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. |
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| bpp - bits per pixel (8,16 or 32) |
| 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 |
| misbehaviour so take care(for instance memsize=12345678 or memdiff=23784 or |
| nativex=93) |
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| Contact: jani@astechnix.ro |