What device do you need to port a N64 Cartridge into a ROM file for emulators?

I'm not doing this to distribute ROM files on the internet. I have a Nintendo 64 that doesn't work anymore and I want to port my games onto ROM files so I can still play them.
Update: Every time I look for game copiers for N64 cartridges, it only comes up with NES and SNES game copiers but I can't find one for the Nintendo 64. How does everyone put Nintendo 64 games on ROM files?
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