i suggest to use dedicated emulators for snes and megadrive, such as genesisplusVita and snes9x. in PFBA, if games run too slowly please disable graphic filters and enable frameskip. without filters and with frameskip most of games run at 60fps. to access to dipswitches press select+square after starting a game. it doesn't work with every system game but, for example, it works with neogeo.