Add support for legacy Gameport controllers?

[kikendo]

I was wondering if this was possible, maybe via this device: https://github.com/necroware/gameport-adapter

The main reason I haven't dumped my SB16 in favor of the PicoGUS on my main setup is that I love to use my Gravis Gamepad. Would love to be able to use it with my PicoGUS!