Enter the Minus World! Nintendo Cartridges Share Secrets!

on YouTube ↗10m

" summary

Demonstrates a reproducible hot cartridge swap that Japanese gamers originally used to access up to 256 possible worlds in Super Mario Bros by exploiting the CPU/PPU split, character ROM vs program ROM, and the NES's 2 KB RAM. Shows the exact RAM byte at address 0x7FD holding the continue/world value, explains how the PPU decays and then reuses tile data, and cites tools and sources like NES Dev resources and Nestpler plus a disassembly to confirm the behavior.

AI-written summary · about

" chapters (7)

1. 0:00Introduction
2. 1:35The Undercover Trick
3. 2:50How to do it
4. 4:00Hardware
5. 6:53Character Layout
6. 8:10Underwater World
7. 8:55Sources

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