AMX Mouse
From CPCWiki - THE Amstrad CPC encyclopedia!
A mouse by the British company Advanced Memory Systems.
The mouse was connected to the joystick port of the CPC. An additional lead plugged between the 5V power connector coming from the monitor and the 5V-socket of the CPC.
There were three versions in all.
Other ways to connect a mouse to the CPC
Modern:
Pictures
Software
AMX Art Stop Press MAX AMX 3D Zilicon