Notes on Retroarch from a Fire TV Stick 4K user. A lot of information here will also be applicable to any platform.
Load the core, then go to information > core information > delete core.
- start a game
- go back to Retroarch menus
- Options
- turn on
Enhanced resolution (slow)
Not compatible with:
- Star Wars: Dark Forces
- Options > Pad 1 Type > standard|analog|dualshock|negcon|none
I have found that some games don't understand the Start button if using dualshock (Wipeout 3).
Convert to .pbp using PSX2PSP or create an .m3u file with each disc name on it's own line. Load this .m3u file to play the game.
Use the disk management to change disks (drive open/close, change disk index, drive open/close).
Change the name of the icon (in assets/xmb/monochrome by default) to match the playlist name. ?
For security reasons you should create a folder structure like this example for thumbnails:
/[your_external_drive]/Android/data/com.retroarch/[thumbnail_folder_name]
https://forums.libretro.com/t/android-thumbnails-on-external-storage/19802/15