Adding PCE console specific layer on top of that, makes for an interesting challenge (no, not a reference to Ys II).
I THINK I had one of those pos controllers about 10 years ago.
By the way, why does that pad have a PS/2 connection? Those pads used the standard gameport. I have never seen a PC controller using PS/2, and I don't think such a thing would even work. Maybe someone modified a Gravis pad to work with the PCE or something.