I recently purchased a Mazda A3 bundle for my main cabinet when I go to allocate the start button on the wheel to the start command in MAME it doesn’t recognise the button. The majority of buttons on the R3 can be used but there are a few that cannot. My question is is there a limit to how many buttons MAME can handle from controllers and if so is there a work around to select which buttons can be used. Thanks in advance