On Thu, 22 Sep 2011, Tony Duell wrote:
  ['PS/2' keyboards]
  And let's be clear--it's the connector,
not the electrical interface
 (which is identical to that of the 5170) that differentiates these. 
 Indeed. I can;t be the only person to have chopped the mini-DIN plug of a
 PS/2-compatible keyboard and soldered a 5 pin DIN plug to the cable to
 conenct it to a 5170 or clone. 
They used to sell adapters for this, I still have a couple in the parts bin.
                        Alexey