# Arduino_X-Arcade_USB-adapter "Old" PS/2 -version of X-arcade. ![X-Arcade](https://github.com/mcgurk/Arduino-USB-HID-RetroJoystickAdapter/raw/master/Images/x-arcade-dual-joystick.jpg) ``` D9-connector -> Arduino 5 -> 3 (clk) 6 -> 4 (data) 1 -> Vcc (5V) 2 -> Vcc (5V) 9 -> Vcc (5V) Shield -> GND ``` Library: PS2KeyRaw Arduino Pro Micro (select Arduino Leonardo from Arduino IDE). PS/2 keyboard not needed.