Separate names with a comma.
Just place PS1 bios files inside retroarch/system folder. This works for me with PCSX Rearmed core.
My comment is there is slowness in overall...
I played neo geo roms without any problems using FBA Alpha neogeo cored (i played magical drop 3, metal slug)
Any news regarding Atari 2600...
Is there an Atari 2600 Core?