Sorry for my English from now.
I'm having problems with the Neo-Geo Games, whether it's Metal Slug 3, Metal Slug 5, KOF 99 to 2003, Samurai Showdown V. (KOF 94 to 98 goes perfectly) (MSG X, MSG, MSG 2, MSG 4).
RetroArch 1.7.5 - Luma 9.1 - Boot9strap 1.3 - Firmware 11.9.0-42.
Edit:
Problem...