fwiw, I successfully installed netbsd mac68k under qemu, by booting an
install kernel from hfs, and running from there. I gave it a second
1GiB disk image for netbsd, which sysinst dutifully partitioned and
created an ffsv1 filesystem on.
The booter now successfully loads and boots the netbsd kernel from
the ffsv1 filesystem.
I haven't tried bigger disk images, but this setup is great for
experimentation, and easy enough to do.
--
Paul Ripke
"Great minds discuss ideas, average minds discuss events, small minds
discuss people."
-- Disputed: Often attributed to Eleanor Roosevelt. 1948.