Can you play PlayStation 1 games on a Playstation 4? - Quora
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
PSX-FPKG: Updated Emulator & Multi-Disc PS1 Support for Jailbroken PS4s! - YouTube
Gamers Find PS1 Emulator Inside MediEvil Remake
7 Best PS1 Emulators For PC, Android, Linux & More - Cultured Vultures
Crash Bandicoot PS1 GAMES via PS1HD (Native PS1 emulator on PS4) - YouTube
The best PlayStation emulators for Android - Android Authority
How to use Sony's Official PS1 & PSP emulators on a 9.00 PS4 - YouTube
PS1 Games on the New PS Plus Will Seemingly Have a CRT Filter Option and More - IGN
PSX 2 PS4 v1.5: Convert PS1 iSOs to PS4 PKGs (PSXtoPS4) by Markus95 | PSXHAX - PSXHACKS
PlayStation 4 and PSVita Releases: PCSX-R port for the PS4 has been released allowing you to emulate PS1 games and ElevenMPV 2.1.0 released with many fixes! - Wololo.net
Recent Emulation News: PlayStation Classic makes use of open-source PS1 emulator and is pretty lacking feature-wise with ONLY ONE SAVESTATE SLOT, SNES9x 1.57 released and Bottlenose emulator front-end just dropped - Wololo.net
PS1 Games on PS4, PS5 Have a Big Downside
EP 5) How to Run PS1, PS2 & PSP Games on a PS4 (9.00 or Lower!) - YouTube