I think a psx emu should have s mapped as L3 and up mapped as R3, then the 8 keys around them would be the 8 directions, eg w is left stick up, x is left stick down, backspace is right stick up+right. Suddenly big thumbs and a small keyboard is a advantage Same around g for the d-pad, l,o,k,i as x,o,sq,tri volume as L1/L2, camera half press as R2, space as R1, and u/j as start/select.