Libretto Atari5200 emulator - how to map function keys of original HW to Joystick?

  • I successfully put the Atari Emulator 400/800/5200 into operation and was so happy to see that my favorite game of my childhood "Caverns of Mars" was appearing on my OLED.

    But I have not found out how I can map the Select/Option/Start buttons of the original HW to LibreELEC's Joystick. Without that I'm not able to start the game....

    Any hint?

    Thx in advance

    O.

    Edited once, last by olili: typos (January 21, 2024 at 7:39 PM).