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Re:Project-Nested: An NES Emulator Running on the SNES by Tarsul on Sunday July 11, 2021 @04:08PM (#27804190)
your link is about the behavior when Mario hits a brick whereas OP was talking about acceleration of Mario (I think he means running?!). Quite interesting link, nonetheless!
Re:Project-Nested: An NES Emulator Running on the SNES by Wowfunhappy on Sunday July 11, 2021 @04:14PM (#27804218)
Yes, but we often don't feel what we think we're feeling! The patch changes Mario's speed when he hits a brick, which will have implications for when he hits the ground.

I'm far from an expert player, but I really think the physics are identical once the patch is in place. I sometimes wonder if it was really a mistake at the factory—something they didn't catch until 20,000 PCB's in, and didn't want to change in revisions for consistency.