zuiko21 - interesting. Given the damning evidence of multiple FPUs I'll find some time to do surgery on the IISI card.

Bunsen - agreed about the oscillator. Looks like the nubus hz is independent of the PDS hz. Testing a nubus card in the SE/30 is problematic though, the monitor tube is *directly* in the way and I don't have any 96 pin right angle sockets. FYI I'm using one of artmix's pricey PDS riser things.

Trash80 - are you sure the FPU only has one vcc pin? The CPU has a dozen or so