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When one gets a computer, it must be expected that the owner can run any code on it that they want. often this isn’t the case, though, as a lot of modern devices are sold with locked bootloaders or worse. Older technology is a little bit much easier to handle, however, but arbitrary code execution on something like an original Nintendo still involves quite a lot of legwork, as [Retro game Mechanics Explained] shows with the inner workings of incredibly Mario brothers 3.

While this hack doesn’t permanently modify the Nintendo itself, it does allow for arbitrary code execution within the game, which is used mostly by speedrunners to get to the end credit scores scene as fast as possible. To do this, values are written to memory by very carefully manipulating on-screen objects. once the right values are entered, a glitch in the game involving a pipe is exploited to execute the manipulated memory as an instruction. The instruction planted is a lot of often used to load the Princess’s chamber and complete the game, with the current record hovering around the three-minute mark.

If you feel like you’ve seen something like this before, you are likely thinking of the incredibly Mario world exploit for the SNES that allows for the same style of arbitrary code execution. The Mario 3 hack, however, is simpler to execute. It’s also worth checking out the video below, because [Retro game Mechanics Explained] goes into great depth about which values are written to memory, how they are carried out as an instruction, and all of the other inner workings of the game that allows for an exploit of this level.

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