make Kensington Turbo Mouse ( actually a trackball ) work:
- this thing speaks EMP, act like it
- adjust the *way* excessive timeout for trying to enable EMP mode on mice -
  for some reason this trackball shows up as two devices - the trackball and a
  non-functional non-EMP mouse
- map both buttons to button 0 - one is an on/off switch for button 0, the
  other shows up as regular button 1

(macallan)