> The 9600-G4 combination just won't boot. Oh god, why?

Could be this:

https://morph.zone/modules/newbb_plus/viewtopic.php?topic_id=7990&forum=11&start=2
https://morph.zone/modules/newbb_plus/viewtopic.php?topic_id=9596&forum=11&start=1

> it seems PC AGP radeons won't work at all. I have tried both an X800 and an X1950 in
> both the G4 and th G5 and nothing happens. I thought MOS (3.9 on both G4 and G5)
> could make use of them, even if Mac boot couldn't. :( Anyone has a clue on this last point?

X1950 on G5 should work, but neither X800 nor G4 should.