1Tridentfb is a framebuffer driver for some Trident chip based cards. 2 3The following list of chips is thought to be supported although not all are 4tested: 5 6those from the Image series with Cyber in their names - accelerated 7those with Blade in their names (Blade3D,CyberBlade...) - accelerated 8the newer CyberBladeXP family - nonaccelerated 9 10Only PCI/AGP based cards are supported, none of the older Tridents. 11 12How to use it? 13============== 14 15When booting you can pass the video parameter. 16video=tridentfb 17 18The parameters for tridentfb are concatenated with a ':' as in this example. 19 20video=tridentfb:800x600,bpp=16,noaccel 21 22The second level parameters that tridentfb understands are: 23 24noaccel - turns off acceleration (when it doesn't work for your card) 25accel - force text acceleration (for boards which by default are noacceled) 26 27fp - use flat panel related stuff 28crt - assume monitor is present instead of fp 29 30center - for flat panels and resolutions smaller than native size center the 31 image, otherwise use 32stretch 33 34memsize - integer value in Kb, use if your card's memory size is misdetected. 35 look at the driver output to see what it says when initializing. 36memdiff - integer value in Kb,should be nonzero if your card reports 37 more memory than it actually has.For instance mine is 192K less than 38 detection says in all three BIOS selectable situations 2M, 4M, 8M. 39 Only use if your video memory is taken from main memory hence of 40 configurable size.Otherwise use memsize. 41 If in some modes which barely fit the memory you see garbage at the bottom 42 this might help by not letting change to that mode anymore. 43 44nativex - the width in pixels of the flat panel.If you know it (usually 1024 45 800 or 1280) and it is not what the driver seems to detect use it. 46 47bpp - bits per pixel (8,16 or 32) 48mode - a mode name like 800x600 (as described in Documentation/fb/modedb.txt) 49 50Using insane values for the above parameters will probably result in driver 51misbehaviour so take care(for instance memsize=12345678 or memdiff=23784 or 52nativex=93) 53 54Contact: jani@astechnix.ro 55