MMC64 and REU and Retro replay: how to enable them?

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  • Hi all,


    I understood that REU is a memory extension which allows for bigger demo's (and more colors if you believe the demo). REU as an option (and MMC) just as Retro replay are found under menu "Cartridge Settings" However, I can't activate any of these options. No MMC64 (default value off), Default Cartridge None etc. All options here are greyed out.


    How can I activate these options?

    Thanks