In testing this, I have now somehow broken the PSX emulator. It loads games into a black screen and needs a hard reboot every time. Maybe now is as good a time as any to mention that things can get odd with Retropie, as can often happen with emulators. I've had to do my fair share of troubleshooting and changing settings to make things work for me since I started using Retropie, and sometimes things would just break for initially unknown reasons.