PS5 may natively play PS1, PS2, PS3 game discs | TweakTown
PS4 backwards compatibility: Can You Play PS1, PS2, and PS3 Games on PS4?
Sony releases free PS1 theme for PS4, PS3 and Vita | Eurogamer.net
PS5 patent suggests PS3, PS2 and PS1 backwards compatibility is coming | Laptop Mag
Amazon.com: AV Cable for PS3 PS2 PS1, Audio Video RCA Cable Compatible with Playstation 1 2 3, 1.8M/6FT Composite 3 RCA Gold-Plated TV HDTV Display : Video Games