I got a XArcade 2 player box from a guy on ebay and it works perfectly with Mame and the PC emulators in my cab. Unfortunately my 1.4 TBird cannot quite make those PSX games work under emulation so I resorted to getting a cheap PSX original console.
I bought the adaptor plugged it in, booted Soul Blade, all controller ports plugged, (yes it was off when I did it) ready for action........zilch

Tried on the Xarcade Website, noted the PSX2 issue, but nope still cannot get the controller to work in either digital or analog mode.
So I bought another PSX thinking the other one was duff, and here I am again without Xarcade action. I have tried the controllers that come with the unit and they work ok. So what gives?
Left it for a week and came back to it today. Plugged only 1 controller port into the PSX and it works, but I cannot get the XArcade to work 2 players side by side like it should be.

I have ordered a DC adaptor too so I hope this is only related to the PSX, as it will be pretty lonely without a human opponent. The PSX is not the PSOne and the Bios version is soooo old that it looks like one of the originals from 1997.
Any clues?