@fmo said in 2 MICE TO USE WITH ARKANOID (MAME): Hello, How to map 2 mice on Recalbox (Player1=Mouse0, Player2=Mouse1). I built arcade cocktail table so players can not share same mouse . I've looked previous post about update retroarch.cfg file without sucess. Thanks, FM I add few logs/parameters files about my settings. To get MOUSE_IDX , i looked to /dev/input/by-path folder. So I guess IDX for mice are 2 and 5. ls -ltr total 0 lrwxrwxrwx 1 root root 9 Jan 1 1980 usb-_USB_Keyboard-event-kbd -> ../event1 lrwxrwxrwx 1 root root 9 Jan 1 1980 usb-_USB_Keyboard-event-if01 -> ../event3 lrwxrwxrwx 1 root root 9 Jan 1 1980 usb-PixArt_USB_Optical_Mouse-mouse -> ../mouse1 lrwxrwxrwx 1 root root 9 Jan 1 1980 usb-PixArt_USB_Optical_Mouse-event-mouse -> ../event5 lrwxrwxrwx 1 root root 6 Jan 1 1980 usb-Microntek_USB_Joystick-joystick -> ../js1 lrwxrwxrwx 1 root root 9 Jan 1 1980 usb-Microntek_USB_Joystick-event-joystick -> ../event4 pwd /dev/input/by-id cd .. cd by-path ls -ltr total 0 lrwxrwxrwx 1 root root 6 Jan 1 1980 platform-3f980000.usb-usb-0:1.1.2:1.0-joystick -> ../js0 lrwxrwxrwx 1 root root 9 Jan 1 1980 platform-3f980000.usb-usb-0:1.3:1.1-event -> ../event3 lrwxrwxrwx 1 root root 9 Jan 1 1980 platform-3f980000.usb-usb-0:1.3:1.0-event-kbd -> ../event1 lrwxrwxrwx 1 root root 9 Jan 1 1980 platform-3f980000.usb-usb-0:1.2.3:1.0-mouse -> ../mouse1 lrwxrwxrwx 1 root root 9 Jan 1 1980 platform-3f980000.usb-usb-0:1.2.3:1.0-event-mouse -> ../event5 lrwxrwxrwx 1 root root 9 Jan 1 1980 platform-3f980000.usb-usb-0:1.2.1:1.0-mouse -> ../mouse0 lrwxrwxrwx 1 root root 9 Jan 1 1980 platform-3f980000.usb-usb-0:1.2.1:1.0-event-mouse -> ../event2 lrwxrwxrwx 1 root root 6 Jan 1 1980 platform-3f980000.usb-usb-0:1.1.3:1.0-joystick -> ../js1 lrwxrwxrwx 1 root root 9 Jan 1 1980 platform-3f980000.usb-usb-0:1.1.3:1.0-event-joystick -> ../event4 lrwxrwxrwx 1 root root 9 Jan 1 1980 platform-3f980000.usb-usb-0:1.1.2:1.0-event-joystick -> ../event0 Parameters about mouse in retroarch-core-options.cfg : /recalbox/share/system/configs/retroarch/cores# grep mouse retroarch-core-options.cfg input_grab_mouse_toggle = "f11" input_grab_mouse_toggle_axis = "nul" input_grab_mouse_toggle_btn = "nul" input_grab_mouse_toggle_mbtn = "nul" input_player10_mouse_index = "0" input_player11_mouse_index = "0" input_player12_mouse_index = "0" input_player13_mouse_index = "0" input_player14_mouse_index = "0" input_player15_mouse_index = "0" input_player16_mouse_index = "0" input_player1_mouse_index = "2" input_player2_mouse_index = "5" input_player3_mouse_index = "0" input_player4_mouse_index = "0" input_player5_mouse_index = "0" input_player6_mouse_index = "0" input_player7_mouse_index = "0" input_player8_mouse_index = "0" input_player9_mouse_index = "0" mame2003_mouse_device = "mouse" menu_mouse_enable = "true" prboom-mouse_on = "disabled" sgx_mouse_sensitivity = "1.25" Do you see any mistake ? Thanks.