Technically, we're booting Linux, to emulate a PDP-11. Once Linux is booted run:
cd /opt/unixv4
pdp11 boot.ini
Once you see some info about the controller not being valid, type
kit should push you to a newline, then type
unixthen hit enter. From there you should have a login prompt, at which you can type
rootand play with the system as you see fit.
Special thanks to:
Source code and scripts used to build this can be found here: https://git.riedstra.dev/mitch/unixv4/about/