It was pretty bad last time I tried to run NetBSD on my vaxen. Back around
NetBSD 1.5.2 or something like that I was able to install via mopboot on my
MicroVax 3600 and a few VaxStation 3100's. Years later I tried to boot it
up again and it couldn't boot without crashing. I tried a later release
and it wasn't much better. Install went OK, but the userland code was
compiled with some funky options that caused it to throw invalid
instruction exceptions. By then I had my VMS hobbyist kit.
-Dave