[robespierre]

I think that the GF3 is the only part of the graphics that uses the VME bus. The other boards communicate over private channels with the GF3: via the P2 and P3 backplane connectors and the paddle card that bridges the boards. So the grant jumpers on slots 10,11,12 may be correctly installed.

I have some photos of my 4D/70G when it was working, I will try to dig them up. There may be a shot of the backplane, although I was not too concerned with it at the time.