Mame Controls

How to convert a USB controller to control Mame arcade please tell me and Im a ameutar

If you can already use the controller with MAME, so it's a good start. What controller is it? Most of the time people are able to hack the controller and connect buttons on their controller is. The problem comes when connecting joysticks. Old school analog sticks are (have a micro-switch for each direction of movement. 4 channels and 8-channel controllers) New controllers can be found, which are digital. Your controller is probably digital club.

Take a Nintendo controller as an example. http://www.wishtech.com/buttons2.gif
The joystick control center, functions as the buttons (analog) on the + button works with digital access to x.