[jan-jaap]

So I bought this board to see what it is. It took some time but it's finally here.

I noticed one thing I didn't realize before: there's a WD33C93 SCSI controller on the board between the RAM and the VME connector, but there's no SCSI header on the board. That means SCSI is connected through the backplane.

The only IRIS I'm aware of with a VME CPU board and SCSI through the backplane is the Professional IRIS. I'm not saying this is an IP4 evolution -- I don't think it is. But if the VME pinning of the SCSI bus is compatible with the IP4, I would be able to run it in the chassis of the Professional IRIS. It will take a good amount of investigation before I dare try this and risk the board (and the Professional IRIS).

I think I'll start by dumping the PROM chips to confirm that it's an IP6-like. I'd also like to find out which graphics it's supposed to work with.