IGN - The “Nintendo PlayStation” prototype was developed as part of a potential partnership between Nintendo and Sony to play both SNES cartridges and CD-based games, but it never entered mass production.
Official PlayStation 1 Development Kit (Hardware) · RetroReversing
PSIO prototype loads PlayStation 1 ISOs on the console, no burned CD necessary (video) | Engadget
Wave 2 of Project Deluge Brings PS1, CD-i, and Saturn Prototypes | TechRaptor
Evolution of the PlayStation 1 Controller Prototypes : r/retrogaming
PS1 Press Discs and Prototypes : Free Software : Free Download, Borrow and Streaming : Internet Archive
The Last Known Nintendo PlayStation Prototype Is up for Auction
Datei:Nintendo Playstation Prototype (38460196990).jpg – Wikipedia
Nintendo PlayStation: Prototyp wird versteigert, wohl für viele Millionen - WinFuture.de
TET EVO III Supra / Dominikus 1000 / Basis: Sony Playstation SCPH-1000 kaufen • phonobar.se
Rare Sony PlayStation images you have never seen [PIC] | Page 7
CV | Sony PlayStation 1 Pre-production Prototype Controller
Is this some kind of Playstation One prototype? - Prototypes - AtariAge Forums
Playstation 1 in Brandenburg an der Havel | eBay Kleinanzeigen