Configuring MAME so a button is active when unpressed ?

[brianon]

Guys. I've tried and failed to get my Steering wheel pedals working in MAME. I give up !

But the steering wheel kinda works well on Outrun and the like. Problem is the accelerator needs a button to be pressed by hand. I can use the buttons on the wheel (old Logitech MOMO) but it gets tiring holding a button during the game.

Is there a way I can configure MAME(per game) so that a button is active when not pressed ? So in Outrun it would accelerate when I don't have the button pressed and ease off the gas when I do press it ?

I know I can wire a button to always on (I think) but i don't want to have a button always on. I just want it per game configured by software.

[brianon]

Omg. I just figured it out. I turned on P1 Pedal 1 Reversed.