SCSI stuff won't work until NCR5385E/NCR5386 device is written -- I've only added a stub to make self-test pass smile

Yes, there is a floppy (from Linux/Besta port) -- two, in fact: flop800.* on http://ftp.stu.neva.ru/besta/linux-bin/

But neither is designed for CPU30R4 -- one is for 'CP31' board (could be an earlier revision of CPU30) and another for 'HCPU30'.