Shadow Lord
Veteran Member
Some bus mice used the Canon connector which was used on the early Mac as well. It looks very similar to a female DB9 connector.
Disclaimer: I have never seen a bus mouse with that connector. I am going by a picture of early bus mice I saw in a historical article.
http://logistory.wikispaces.com/Logitech+Bus+Mouse has a picture of it.
That looks about right. The MS controller cards I have seen also look very similar.