It sounds like you're entering the realm of sufficiently niche to the point that you might need two computers (or at least dual boot). I've been there for decades, though not for the exact same reason.
Re:The floppy disk orphaned by Linux
by davesmith1983 on Saturday July 27, 2019 @10:12AM
(#20542112)
Yeah you are probably right. I think the last version of Windows that runs well and has a proper floppy driver is XP-64 bit (basically Windows Server 2003 64bit).
OpenBSD will probably work well if I swap out the Geforce 8800 GPU with an AMD GPU of some sort, I am sure I could get a relatively decent one second hand.
Well we will see what happens I suppose.