->yes, i know that, but when you have more emulators than mame it doesn't work For example, the default "coin1" key is assigned to the number "3" on the keyboard in mame, and you're right, when you press the number "3" on keyboard, it works, But i have a custom mapping on my X-arcade because some emulators don't like the number "3"(sometimes it's a hotkey for an emulator,or for Vpinmame it just add credits, but this button HAD to be the left flipper, etc..) and i've reassigned the left coin key on my Xarcade (the left flipper in fact) to be the "O" key, so my setup of my X-arcade doesn't interfer with any emulators & hotkeys So, i just want to setup the "enter game" key to be "O" key (or anything else) instead of the "3" key, because i don't need any keyboard on my mamecab excepts for pressing the key "3" in attract mode to play game......... I don't have seen any line in the GamEx.ini to resolve this problem, but is it possible?? Many thanks for help indeed