Question about bios and folder structure

where is basis can i put bios for mess such as pockstation and atari5200 i need example of some sort it cant find my bios about to shove it in roms lol i been :banghead: on this for awhile any help is wanted :slight_smile: what i mean the file structure where the bios folders go or does it matter

ok i reply to my own post what im looking for is where how do you setup lets say atari 5200 in retroarch do i put bios in roms folder and do i still need hash folder in systems and do i point the system folder where the hash folder is i need input :slight_smile:

im getting close to a solution got it to boot in mess through retroarch but its distorted sound any ideas? and why cant mame boot it up? i enabled cli on both