Bunsen mentioned in the other thread that the IISI nubus adapter might be hard wired to work with a 20mhz system (like the IISI). Over clocking the SE/30 to 20MHz isn't an option, so I under-clocked the nubus adapter to match the SE/30's 31.3344MHz oscillator. No effect. Still zebra'd.

Now I'm thinking it's either a difference in the IISI's ROM or the previously mentioned FPU thing. It would be nice if I had a IISI ROM to try out. It would also be nice if either of the FPUs were socketed.