In an email to the FreeBSD Hackers mailing list, Rink P.W. Springer reports success in porting FreeBSD 5.4 and 6.0 to the XBox game platform:
Over the last 2 weeks, I have been working on a port of FreeBSD for the XBox. During this effort, Ed Schouten has given me assistance by reviewing patches and giving advice. The port is fully functional. The framebuffer is fully supported, same goes for sound and USB devices (such as an USB keyboard for the console). Only ethernet is missing, currently, as the binary only driver in /usr/ports/net/nvnet fails with an error 5, for some reason. Assistance there would be very welcome.
I have made patches for FreeBSD 5.4-RELEASE and FreeBSD 6.0-BETA1. Currently, the port requires the Linux Cromwell BIOS (which was patched so it would understand FreeBSD kernel ELF files). More information on the patch can be found in the mail archives of xbox-linux, here . You will need the latest CVS version for it to work, or 2.40 + patches (patches can be found at the URL above)