Joystick The MSX joystick is an eight way joystick with two buttons. It is emulated by either a real PC joystick or by keyboard keys. To use a joystick as input device or use the PC keyboard to simulate a joystick , you have to select it in the Controls properties dialog. Mouse Some MSX programs have support for mouse. Not surprising, the emulator uses the PC mouse as input device to emulate the MSX mouse. To use the mouse as input device, you have to select it in the Controls properties dialog. The mouse can be used on a MSX like a joystick, if you press the left button at least 5 seconds after the boot sequence when you start the machine. It's also the case in blueMSX !