As for your problem, as everyone has said, your internal battery is dead, and you should actually be notified of it when you start up your game. Real-time clock support, even without configuration. - Real-time clock support, even without configuration.It aims to be faster and more accurate than many existing Game Boy Advance emulators, as well as adding features that other emulators lack. The wall clock is just a reference for the internal game clock. Support for Game Boy and Game Boy Printer cameras.
This is a tutorial on how to enable real-time clock in the VisualBoyAdvance emulator. Mgba real time clock mgba real time clock mGBA is an excellent new generation of Nintendo Game Boy Advance emulator with very high degree of completion (most games can be simulated perfectly) and pretty fast running speed.