IANAL, but my understanding is that whatever patents and industrial design rights Nintendo had on the N64 expired long ago, so replicating N64 hardware is perfectly legal as long as you don't use the original logos and trademarks.
Iirc a talk about the Gameboy hardware @ Chaos Communication Congress correctly, the system _requires_ the Nintendo logo shown at game startup to be present, otherwise it won't boot. And showing the Nintendo logo without authorization/licensing from Nintendo is copyright infringement.
This is likely not the case on the N64, but it's an interesting bit of detail of how Nintendo goes about things.
Iirc a talk about the Gameboy hardware @ Chaos Communication Congress correctly, the system _requires_ the Nintendo logo shown at game startup to be present, otherwise it won't boot. And showing the Nintendo logo without authorization/licensing from Nintendo is copyright infringement.
This is likely not the case on the N64, but it's an interesting bit of detail of how Nintendo goes about things.