|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
|those from the TGUI series 9440/96XX and with Cyber in their names
|those from the Image series and with Cyber in their names
|those with Blade in their names (Blade3D,CyberBlade...)
|the newer CyberBladeXP family
|All families are accelerated. Only PCI/AGP based cards are supported,
|none of the older Tridents.
|The driver supports 8, 16 and 32 bits per pixel depths.
|The TGUI family requires a line length to be power of 2 if acceleration
|is enabled. This means that range of possible resolutions and bpp is
|limited comparing to the range if acceleration is disabled (see list
|of parameters below).
|1. The driver randomly locks up on 3DImage975 chip with acceleration
| enabled. The same happens in X11 (Xorg).
|2. The ramdac speeds require some more fine tuning. It is possible to
| switch resolution which the chip does not support at some depths for
| older chips.
|How to use it?
|When booting you can pass the video parameter.
|The parameters for tridentfb are concatenated with a ':' as in this example.
|The second level parameters that tridentfb understands are:
|noaccel - turns off acceleration (when it doesn't work for your card)
|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
|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
|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 800x600-8@75 as described in
|Using insane values for the above parameters will probably result in driver
|misbehaviour so take care(for instance memsize=12345678 or memdiff=23784 or