FBA vs Genesis RetroPad button mappings

I’ve noticed that the RetroPad button mappings for the Genesis and FBA cores are completely different.

For the Genesis cores, the RetroPad button arrangement for a 6-button controller is:

L1 X  R1
Y  B  A

For the FBA cores, the RetroPad button arrangement for a 6-button game is:

Y  X  L1
B  A  R1

I assume this is intentional, and these two tables should be a good reference to set up the Core Input Remapping for one of the two.

Did you check if SF2 arcade and SF2 MD mappings are matching on FBA ? If they aren’t, i think the issue is with FBA.

Nah fba is fine the issue is in gpgx