ps2amigamouse

This image shows the project connected to an actual Amiga 500. The board used is an Arduino Nano, with a DB9 and PS/2 connector on a small PCB which I spray-painted white.

About...

This is a simple sketch that allows you to connect your PS/2 mouse to your Commodore Amiga 500. Other Amiga types may work, but are untested. I wrote this quite some time ago but never gotten around to share it.

It uses a slighly modified PS2Mouse.cpp but I'm not sure where I got the original from and what has been modified.

The code is far from pretty..! I never gotten around to cleaning it up.

Known issues

• Theoretically a middle button could be supported, but this only supported the LEFT and the RIGHT buttons.
• Mouse speed is hardcoded.
• The code is quite ugly. I can't stress that enough.

Amiga joystick / mouse port connection

FROM AMIGA MOUSE CONNECTOR TO ARDUINO (female connector, seen from the BACK of the connector)

 +--------------------+  1 - V-pulse           -> Arduino PIN 2
 | 1o  2o  3o  4o 5o  |  2 - H-pulse           -> Arduino PIN 3
  \  6o  7o  8o  9o  /   3 - VQ-pulse          -> Arduino PIN 4
   +----------------+    4 - HQ-pulse          -> Arduino PIN 5
                         5 - BUTTON 3(Middle) NOT CONNECTED 
                         6 - BUTTON 1(L)       -> Arduino PIN 6
                         7 - +5V (max 50mA)    -> Arduino VCC
                         8 - GND               -> Arduino GND
                         9 - BUTTON 2(R)       -> Arduino PIN 7

PS/2 mouse connection

FROM PS/2 CONNECTOR TO ARDUINO (female connector, seen from the FRONT of the connector)

       6o [~] 5o         1 - DATA              -> Arduino PIN 9
          [_]            2 - not connected
       4o     3o         3 - GND               -> Arduino GND
                         4 - VCC               -> Arduino VCC
        2o   1o          5 - CLOCK             -> Arduino PIN 8
                         6 - not connected

Early Arduino prototype with wiring visible: