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what console is the mod running from. thank you i still watch it because contra is really a fun game

I'm using an emulator on my PC to run the modded rom file. The emulator I'm using is "FCEUX". You can always flash the rom file to a blank NES cartridge, if you have the tools required to do that, and then play it on the NES. I don't know how to do that though, and it requires other hardware. The easiest way is by emulator.