"Chris G. Demetriou" <cgd@cs.cmu.edu> writes:

> Assuming that the 4D20 is the PBXGB-CA

Yes.

> Most/all of the accelerated graphics functionality on the boards is
> provided by the big ASIC, and there's apparently a "switch" which
> enables that video output, or the VGA video output.

Hmm, I assume you mean the large chip with the MBI logo on (I don't
have the card available right now).

What is known about it?

/Johan