It can take a snapshot of the entire state of the game: the ROM, the RAM, the registers and stack of the CPU, and so on. The fun thing about running games through an emulator is that the emulator itself can provide extensive save-state functionality. Even the cartridges that do allow this usually only allow saves from specific locations, not from any position in the game. But there are a great many more that offer no way to save games. Maybe that is through a password you write down and use later. Maybe that happens through a battery or an EEPROM in the cartridge. ![]() There are many games that provide some sort of save-game functionality. In this post, I will share with you some interesting tricks involving keyboard mapping and save states. In the last blog post, I showed you how to make a Raspberry Pi emulator using the Open Source project RetroPie.
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