Atari-ST mouse adapter

The schematic was released in german magazine "Schneider Magazin, 07/1988", apparently using 5 diodes and a 4.5V battery.

 CPC Joy Port                     Atari-ST Mouse      Amiga Mouse
 JoyUp    Pin1 --|>|------------- Pin1 XB             Pin1 YA
 JoyDown  Pin2 --|>|------------- Pin2 XA             Pin2 XA
 JoyLeft  Pin3 --|>|------------- Pin3 YA             Pin3 YB
 JoyRight Pin4 --|>|------------- Pin4 YB             Pin4 XB
 JoyFire2 Pin6 ------------------ Pin6 Left Button    Pin6 Left Button
 JoyFire1 Pin7 ------------------ Pin9 Right Button   Pin9 Right Button
 JoyFire3 Pin5 --|>|------------- Pin8 GND            Pin8 GND
 JoySel1  Pin8 ------------------ Pin8 GND            Pin8 GND
 Batt4.5V (+)  ------------------ Pin8 GND            Pin8 GND
 Batt4.5V (-)  ------------------ Pin7 +5V            Pin7 +5V

The Atari-ST adapter is supported by G-Paint 2.0.