simply connect it to a PC to add or change games. The games are typically stored on a soldered flash memory chip that requires a hardware programmer and advanced technical skills to modify.
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| Category | Examples | # of Slots | | :--- | :--- | :--- | | | Super Mario Bros, Battle City, Road Fighter, Excitebike | ~40 | | Game Hacks | "Mario 16" (SMB with swapped sprites), "Fast Contra" | ~60 | | Level Selectors | Super Mario Bros (World 1-1), (World 2-1), (World 3-1) | ~150 | | Life Modifiers | Contra (30 lives), Contra (Infinite lives) | ~50 | | Duplicates | Same game listed in 4 different menu positions | ~100 | simply connect it to a PC to add or change games