February 14, 2018 UPDATE
I've completed a sysload(8) replacement that facilitates extracting the contents
of Mt Xinu's Mach386 media on a FreeBSD machine. It functionally duplicates all of the sysload(8)
options and operations, with the exception of the -u (update from a remote server)
functions. I have no information on the protocol or operation of such a server.
The replacement sysload(8) fully duplicates the Text-base User Interface presented
by the Mach386 utility.
I will next be writing a utility to generate the distribution images. This will
allow creating new floppy images with the latest available binaries for installing
Mach386 onto a machine with all updates available.