Got it working, sort of...

I had to disable my Blizzard060 board (holding down 2 on bootup) but on the 060 it crashes when you insert disk1 after the boot disk. My miggy with an 030 turned out to be the floppy drive needing a bit of clean as I very rarely use floppies these days.
The WHDload slave for it should be easy enough now that I know it's working, but I've got quite a number of other projects on the go just now, so it might not be ready until about Sunday...