Hi. I joined this forum specifically to ask you for help.

I have just installed RetroArch. I established the Snes and Genesis cores worked. I next tried the PSX core (the main reason for me using RetroArch as I already had emulators for the Snes and Genesis).

The first game I tried was Doom and as you noted it hangs on the loading screen.

You mention the need for CDDA files. Can you please tell me where to get these files and what to do with them.