That was my first thought too, and I made up serial and parallel cables. But without a keyboard or disk drives, there's no way to bootstrap it into running some software that will talk to the serial or parallel port.
Ah, but there is. As one of the commenters on the site noted, you make a floppy with the redirection command in "autoexec.bat". Of course, I only have a 3.5 inch USB floppy drive, but not a way to work on 5.25 inch floppies (no sure if spare drive in garage still plugs into anything in newer mobos)
