I guess I was that guy. My first Zip drive had a Centronics interface (you younguns won't understand). I spent months trying to get it to work with passthrough behind the printer and the scanner. Ended up buying a Centronics card with two additional ports. After only a few hours of mucking about with interrupts it sort of worked. Next I got an internal one with an ISA interface. Felt very high tech. Shortly after I got my first CD-RW drive and all that shit was completely obsolete.