HPV Video Adapter / When plugged into the crescendo I get hard lockups either on boot, sometimes it loads the system then locks up, quite random actually.
Extensions conflict?
ultra-slow 256 color video at 400Mhz
How slow is it, with the 400MHz G3 and its 1MB cache? Have you compared it with/without the G3?
the fact that this particular card was not meant to be used in a 6100
Doubtful, IMHO. As you point out, it works fine without the G3.
the HPV card has a scratch on one of the traces leading to the connector but I can't determine whether it has actually been severed
No multitester? You can make a simple continuity checker with a couple of wires, a torch lightbulb and a battery.
