I'll have to check the machine tomorrow. I did
look at the media, its a
standard 5.25
inch floppy with a single index hole. I'd expected a hard-sectored
diskette, but that's
not what its booting from.
There certainly are soft-sectored controllers for this machine.
One hint when dismantling it. After removing the top cover (spring
latches on the sides, frob them with a screwdriver), take out the floppy
drive. It's easy to do, and it gets in the way of just about everything else.
-tony