I've got a Powermac 7500 with the video input and I'd like to use that in BeOS/ppc (which runs well on a 7500 upgraded with the 604e from my 7300, which sits in a corner, pining for the fjords).

I've been looking at the hardware manual and it makes no mention at all about how the inputs work. I assume that means it's undocumented and so completely impossible to write a driver for... anybody know different?

(not that I know the first thing about writing drivers, but it'd really be the icing on the cake of what is a very, very nice BeOS system).