That's understandable.....for myself, RetroArch is my #1 go to emulator for android...with a mixture of old and new cores I think its the best solution....sometimes newer cores breaks old features so I tend to keep copies of new and old cores for those reasons....as far as mame goes, RetroArch is the best on Android....as far as mess or old computers are concerned , mame 0.227 was the last and final version on Android that was pushed out....anything beyond that failed to compile with both mess and mame merged...as far as ps1 goes, have u tried with chds, bin and cue or other compressed formats....I use bin and cue and chds for multi disks to avoid swapping