Ok, hopefully the last #mklinux post for a while. I just found that earlier this year some very clever person worked out how to install mklinux with qemu!
https://www.reddit.com/r/qemu_kvm/comments/1j1v2p9/install_and_run_mklinux_r2_rc5_ppc_in_qemu/
This requires a Mac OS 9 installation ISO, but that can be found here https://archive.org/details/os-9-install-cd among other places.


