PlayStation 4 to get PS1/PS2 emulator - Report - GameSpot
Resident Evil Director's Cut and more PS1 classics playable on PS4/PS5
News: RetroArch FINALLY gets released on PlayStation 4 with 25 cores including PS1, MAME and experimental Nintendo 64 emulators & VitaGrafix 5.0.0 released for the PSVita with re-written parser and more - Wololo.net
PS4] PCSX-R disponbile sur PS4
PS4 : Un émulateur PSOne officiel découvert dans un jeu
PS4] L'émulateur PSX tiré de Siphon Filter apporte les jeux PS1 sur PS4