Reply To: MAME and PSX roms help( i have them already)

[herbfargus]

Where you got your ROMs is your prerogative – links just can’t be posted here to preserve the integrity of the retropie project. The issue you are having is most likely with the rom transfer rather than the ROMs. If you are using retropie 3.0 you’ll first need to create a folder on your USB drive called retropie plug it into your pi, wait til it finishes blinking and then pull it back out, place your ROMs in their respective folders that were created, and then plug it back into your pi, wait for it to finish blinking then reboot your pi or restart emulationstation. If that isn’t working you can try re-enabling the usbromservice from the setup script and then try again. See here for methods on transferring ROMs: https://github.com/retropie/RetroPie-Setup/wiki/How-to-get-ROMs-on-the-SD-card the wiki also shows which file types are accepted for each emulator.

If you have your ROMs transferred and they show up in emulationstation and still aren’t working either you’re lacking a bios or have a bad source of ROMs.