var _map = async_load;

switch (_map[? "event_type"])
{
    case "gamepad discovered":

        var _slot = _map[? "pad_index"];

        if (global.gamepadIndex == -1) global.gamepadIndex = _slot;

        break;

    case "gamepad lost":

        var _slot = _map[? "pad_index"];
        global.gamepadIndex = -1;

        break;
}