I've recently installed Retroarch to my old 3ds xl, and I only use CPS2 core with 4 roms I downloaded. Three of them(Marvel vs. Capcom, Marvel Superheroes, and Mega Man 2: The Power Fighters), run extremely slowly and display choppy audio. I know i'm supposed to configure the video settings manually, what I need to know are what settings to enable. Now about my fourth rom(Marvel Superheroes vs. Street Fighter), it won't run at all... I am currently using version 1.3.0, I appreciate all help!