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  1. Hardware
  2. Retro

The "oldest" Nintendo PlayStation add-on now lives at the National Videogame Museum, and it almost looks like one of my weird SNES accessories

News
By Phil Hayton published 5 March 2026

The Sony MSF-1 belongs in a museum!

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Split Image with top of Nintendo PlayStation developer prototype top on left and SNES (Super Famicom) with Super Wild Card attachment inserted on right.
(Image credit: National Videogame Museum / Phil Hayton)
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The Nintendo PlayStation is anything but a fable at this point, but the National Videogame Museum just got its hands on a "mythical" prototype. Dubbed the Sony MSF-1, the developer CD attachment is currently the "only known unit to exist," but it reminds me of an obscure gadget I've currently got plugged into my SNES.

In a fresh post, the National Video Game Museum, based in Frisco, Texas shows off the Nintendo PlayStation prototype in all its glory. The announcement claims the Super Nintendo CD attachment to be the "oldest" revision of the PS1 prequel system, predating the cancelled retro console contender that once belonged to Sony Computer Entertainment founder, Olaf Olafsson.

The Co-Creator of PlayStation, Ken Kutaragi, also owns a similar version of the Super Nintendo CD, but unlike those prototypes, the Sony MSF-1 slots into a standard SNES cartridge port. It looks less like an actual console and more like development hardware, and while I can't confirm whether it'd work with a standard Super Nintendo or Famicom, it's functionally just like a Chinese floppy disc attachment I've had in my collection for years.

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BREAKING: The NVM has acquired the mythical Nintendo Playstation! 🤯This Sony MSF-1 is the OLDEST known existing Nintendo Playstation hardware artifact, and is the original development system for Sony’s planned Super Nintendo CD attachment. It is the ONLY known unit to exist!… pic.twitter.com/9JQyCsFtxcMarch 4, 2026

No, I'm not claiming to own another Nintendo PlayStation, but the device I have does share similarities with this rare developer unit. While the retro relic acquired by the museum likely boasts extra functionality for theoretically playing something closer to a PS1 game, both connect to an SNES using the cartridge slot, use external disc drives, and feature a parallel port.

There's also a passthrough cart port at the top, which, in theory, would let developers pull cartilage data into memory. That's actually the primary purpose of the floppy drive add-on that I have, as it was effectively a backup system for your SNES games released in the '90s. Thanks to that aforementioned parallel port, it also serves as a way to upload ROMs to a PC, it primarily runs and saves games to and from 3.5-inch diskettes.

Image 1 of 3
Angled view of Super Wild Card connected to Japanese SNES (Super Famicom).
(Image credit: Phil Hayton)
Side view of Super Wild Card connected to Japanese SNES (Super Famicom) with floppy disc drive in view.
(Image credit: Phil Hayton)
Back view of Super Wild Card connected to Japanese SNES (Super Famicom).
(Image credit: Phil Hayton)

This is obviously a phenomenal artifact from a time when Sony wasn't a console giant, and this specific unit seems to be long before its big bust-up with Nintendo. The story goes that the partnership fell apart in the '90s due to licensing disputes and "betrayal" that involved Ninty teaming up with Philips for the CDi. The rest is video gaming history, but this unit provides a glimpse into what developers would have been working on before the OG PlayStation vengefully emerged on the scene.

Image 1 of 3
Top view view of Nintendo PlayStation prototype with cartridge slot and buttons.
(Image credit: National Videogame Museum )
Side view of Nintendo PlayStation prototype with parallel port and power switch.
(Image credit: National Videogame Museum )
Front view of Nintendo PlayStation prototype with disc drive.
(Image credit: National Videogame Museum )

I'll be eagerly awaiting to see if the Sony MSF-1 and whether the National Videogame Museum plans to shove it into an actual SNES any time soon. The various buttons on the top for switching modes, fast-forwarding, and whatever "remain" is suggest that it doesn't have a full operating system, and the urge to see how it actually functions is tempting me to embark on a heist.

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You could say it's a fitting time for this prototype to show up, as the PS2 is celebrating its 26th birthday. In another dimension, there's probably a better-looking version of me writing articles on the Super Nintendo PlayStation 2's anniversary, and that variant is likely still hooking up new Bluetooth adapters to the console and using a DualSense (sorry, not sorry).


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Phil Hayton
Phil Hayton
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Hardware Editor

Phil is the Hardware Editor at GamesRadar+ who specializes in retro console setups, choosing the latest gaming handhelds, and navigating the choppy seas of using modern-day PC hardware. In the past, they have covered everything from retro gaming history to the latest gaming news, in-depth features, and tech advice for publications like TechRadar, The Daily Star, the BBC, PCGamesN, and Den of Geek. In their spare time, they pour hours into fixing old consoles, modding Game Boys, exploring ways to get the most out of the Steam Deck, and blasting old CRT TV visuals into their eye sockets.

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