Well yes, yes they did. It is called Canoe and is for example running inside the SNES Classic Mini.
And that is not the only emulator they wrote.
Writing an emulator is not some obscure magic, and it is way easier if you own all the schematics and other Information used to build the original hardware.
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You think they wrote their own emulator instead of just taking one of the free ones on the internet (who they will likely sue later). That’s cute.
Well yes, yes they did. It is called Canoe and is for example running inside the SNES Classic Mini. And that is not the only emulator they wrote. Writing an emulator is not some obscure magic, and it is way easier if you own all the schematics and other Information used to build the original hardware.
Is it a known thing that they discontinued canoe or something?
That’s not how any of that works
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Sure but why would the source code be available? It’d be funny if it was but it’s probably a compiled program, right?
Implying they have their own emulator and it’s not just running retroarch or something
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It’s not illegal for Nintendo to run retroarch.
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RetroArch and most of its cores are under the GPL or MIT, which allow commercial use.
Nintendo has their own emulators for running these games on newer consoles.