I recently aquired an A5000 from a friend and after looking at the mouse connector, I realised it was the same as the one on the old Logitech Bus Mice that I had lying around. I dug it out and plugged it in, but got nothing, however after opening both this and the original Acorn mouse I found that both had the same colour cables. I matched the order of the wires in the Logitech mouse to those of the Acorn and plugged it in. Sucess!!! It works great and is a REALLY comfortable mouse with a nice long lead.