[rbanffy]

> DG/UX for x86, CTOS, AOS, and RDOS are already included.

Wow! Thanks. I didn't see a list of available titles, so I just shot those blindly. And I never imagined DG/UX for x86 was a thing. I'm pleasantly surprised.

> I'm not sure if IBM would care all that much if somebody wrote an emulator for IMPI AS/400s

They might complain loudly about software copyright - it's not the same thing as VM/370 and MVS 3.8j. S/32 and 34 will most likely have the same issue.

> I've never seen images anywhere for NonStop, VOS, or NIROS, nor do emulators exist for the original hardware they ran on.

NonStop and VOS under x86 might draw some fire, and they would also require emulation of the specific hardware - they run on x86, but not on PCs. As for NIROS, you are right, but Nixdorf might be more amenable to even supporting building emulators (they have a very nice museum in Germany).