I know we had a 486 at some point when I was a kid, but this code would have predated that machine by a few years so I'm not entirely sure. There were also machines at the school (where he worked) but not 100% sure what they had when.

I got fortunate with the disks - I just bought a USB 3.5mm reader and hooked it up to my Ubuntu machine, and there the files were, no corruption that I can tell. I'm glad other people are also enjoying the find!