From: bretcahill@aol.com   
      
   > > > The 5 pin end is male male.  The externally threaded dia is 7 mm.   
   > > >   
   > > > The pins are radially symmetrical oriented with a couple of flat chord   
   > > > areas above 2 adjacent pins.   
   > > >   
   > > > This probably isn't a aviation connector.   
   > > >   
   > > > What is the name of this connector?   
   > > >   
   > > >   
   > > > Bret Cahill   
   > >   
   > >    Sounds like an "IBM" connector, serial (not USB), mostly for mice.   
   >   
   > Somehow an old mouse or keyboard adapter was still laying around that should   
   have been tossed back in the early big banglocene so I cut it open.   
   >   
   > It had 5 wires:   
   >   
   > brown   
   > yellow   
   > red   
   > green   
   > uninsulated.   
   >   
   > The 13.3 mm dia. male connector had 5 pins.  For orientation it's an   
   octagonal configuration missing the 3 top pins.   
   >   
   > From left counter clockwise the wire order was:   
   >   
   > brown   
   > yellow   
   > red   
   > green   
   > nc   
   >   
   > The 10 mm dia female connector on the other end had 6 holes hexagonal.  For   
   orientation the rectangle was below the top of the circle of round holes.   
   >   
   > nc   
   > green   
   > nc   
   > Red   
   > yellow   
   > brown   
   >   
   > Ignoring the nc pins, this is the same order for the 10 mm male.   
   >   
   > Is there some kind of convention where they try to get the same order for   
   all 4 or 5 wire round connectors?   
   >   
   > The M8 male going to a device has, going counter clockwise from power to   
   ground:   
   >   
   > +5v power   
   > nc or data (+ or -)   
   > data (+ or -)   
   > 0v power   
   > nc or data (+ or -)   
   >   
   > The first guess is that it's:   
   >   
   > +5v power   
   > data (+ or -)   
   > data (+ or -)   
   > 0v power   
   > nc   
   >   
   > If that doesn't work (or fry everything) try swapping the assumed data lines.   
   >   
   > If that doesn't work (or fry everything) try:   
   >   
   > +5v power   
   > data (+ or -)   
   > nc   
   > 0v power   
   > data (+ or -)   
   >   
   > If that doesn't work (or fry everything) try swapping the 2nd assumed data   
   lines.   
      
   Pins are nummered 6,4,2,1,3,5 clockwise in the male 10 mm PS/2 connector:   
      
   https://www.youtube.com/watch?v=V_ytY6lhzD0   
      
   The same pins were connected to wires as in my adapter.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)