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Header: fxcg/app.h
Syscall index: 0x1E0A
Function signature: void APP_SYSTEM_DISPLAY(int opt);

Opens the "Display Settings" screen that shows in the start-up wizard and in the System menu (when F1 is pressed).


  • opt - Controls whether the screen should behave like in the wizard (1), or like in the System menu (0).


Allows for setting the brightness value in a scale from 1 to 5. The screen is non-functional in the "fx-CG10/20 Manager" emulator, even though it still displays and returns as described below.

If the value of the parameter is zero, the syscall returns when the user presses EXIT. If the value of the parameter is 1, it returns when the user presses F6.