| 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 |