A major issue specific to Jet Set Radio Future is its incompatibility with the 480p video mode on Xbox consoles. If you try to run the game on this hardware, you may be greeted with a distorted, scrambled screen. To fix this, you can either patch the default.xbe with a script or, more conveniently, update your console's BIOS to Cerbios v2.4.0 or later, which automatically corrects the problem.
When you load a JSRF ISO into Xemu, the emulator locates the default.xbe file. Because original Xbox retail discs were encrypted, modern emulators must bypass or simulate the decryption of the XBE header to execute the game code. If your game dump is corrupted or improperly ripped, the emulator will fail to initialize the XBE, resulting in a black screen or an explicit boot error. Hardware Simulation Challenges Jet Set Radio Future Xbe File