Using the Retronic Design’s USB joystick adapter with the A500 mini and WHDLoad has been demystified!
You must first update your A500 mini with firmware v1.1.1 available on the Retro Games LTD. website. This new firmware enables new features like ADF support and the option to switch physical controllers in game, just to name a few.
Use the original gamepad to start the game in the main menu. Once the game started, press and hold HOME and then press X. This will swap your controller and enable the Retronic Design joystick adaper instead of the gamepad. Don’t forget to update the firmware of your adapter to support A500 mini. See Download section. VoilĂ !