> Unfortunately, Apple didn't design the Q700 video circuitry to do 16-bit,
> only 1,2,4,8, and 24.

Hmmm. I'll have to disagree. The DAFB series of video controllers can all
do the full compliment of depths if there's enough VRAM to back it up at the
current resolution. I'll double check this but I'm positive that the DAFB
is capable of 16 bit mode. Its descendant, the MemC, on the Q650 can do it
for certain (I can walk down the hall and test that :)