Last updated on March the 18th, 2001.
Modes that aren't working include those that don't also work in DOS (read below), but 800x600 works in DOS, so this is one area worth investigating. Turning off interlacing is also not a good idea.
All in all, I think it's enough for the moment. To use it, turn off the automatic saving of options, select the appropriate chipset and select either PAL or NTSC. That'll put the board into TV mode. Use the trick above to get out of it or swap between TV and VGA mode.