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Nintendo is suing the creators of Switch emulator Yuzu
(news.bloomberglaw.com)
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this post was submitted on 27 Feb 2024
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These passages imply the writers of them lack basic computer literacy and don't even understand Nintendo's own systems.
"copied the game ROMs into Yuzu" Yuzu is not a VM or other container and the ROMs are simply stored on disk in their original dumped form... Yuzu doesn't "store" or "contain" any games.
"any copy not on an authorized cartridge" LOL! What about games downloaded from your own digital marketplace, then?
What about a game you downloaded from Nintendo eShop and stored on an external SD card, which is a standard and well supported storage method on Switch? Is that SD card an "authorized cartridge"?
The authorized cartridge thing would hopefully be ignored due to several other times Nintendo tried to stop developers like Tengen from bypassing their licensing system and developing their own carts for the NES (you know those weird ones that were usually blue or black? Those were "illegal" in Nintendo's eyes but they lost every single case they took against them to try and stop them from being made).
ROMs are indeed copied "into Yuzu". They must be loaded into Yuzu's memory in order for Yuzu to execute their code or render their assets. In copyright law, even loading something to memory constitutes a "copy".
Also, almost every emulator is a VM; do you think those ARM instructions are running on your x86 processor and its desktop OS kernel natively?
I thought Yuzu was actually a dynamic recompiler? I remember this practice started in the days of N64 emulation, and these tools are more like debuggers than like VMs. So in this case, ROMs may only be copied "into Yuzu" byte by byte, not stored as a block in memory. At this point it's really semantics, but that's what the lawyers are supposed to figure out, right?
Unlike older emulators, Switch emulators don't even support saving the emulator state, and their savegame data is stored right on the native filesystem. I believe they are actually more like Wine, and remember, Wine Is Not an Emulator.
Yuzu does recompile some parts during runtime by using a JIT, but the rest is still emulated.
You can't compare them to Wine, since Wine acts as a compatibility layer by translating OS specific calls, but it does not translate between instruction sets.
Thanks for clarifying, I only have a casual knowledge of Yuzu internals and had been led to believe the ARM was translated rather than emulated.
The performance is honestly incredible for software emulating a different instruction set.
It says "not on an authorized cartridge or console", the latter would cover legitimately downloaded games. Agree on the other points though.