"Jean-Paul BINI" wrote:

> I've read that it is possible to make a kind of terminator to plug in
> instead of a mouse  to avoid problems ...

Look at http://mail-index.netbsd.org/port-pmax/1997/07/29/0000.html for
info on a "mouse eliminator".  As has been mentioned a few times on this
list, a paperclip can be used to short the relevent pins together...

Simon.