A lot of times it's the hardware interface that's the issue. Old stuff uses serial and parallel ports, motherboard slots,or even abuses PS2 for other purposes.

A lot of times it's the hardware interface that's the issue. Old stuff uses serial and parallel ports, motherboard slots,or even abuses PS2 for other purposes. Good luck finding a windows 10 compatible PC that has ISA slots for example. A lot of old custom hardware hooked right into the ISA bus