Although from testing it briefly with some PC games (Dead Island and Bastion) the A & B and the X & Y buttons seem swapped (A is B, X is Y). Not sure if all games are like tike this.
GPD Win, GPD XD 64gb, PlayGo, RS-90, 3DS XL, DSi XL, GBA SP, GBBC Clone, Gameboy Pocket c/w screen mod, PSP Go
Medion Erazer, Toshiba Z20t, Dell Mini 9, Psion 5MX
Tons of other old laptops and tablets.....