On Apr 30, 15:49, Mike Ford wrote: The keyboards used on Indigos and Personal IRIS machines are custom keyboards -- you need the right one. They use custom 3-button mice as well, which plug into the keyboard. The Indigo versions use a 6-pin miniDIN connector which looks like a PS/2 connector, but the pinout, voltages, and protocols are completely different. Indys and later machines use a standard PS/2 keyboard and PS/2 mouse. A good source is Greg Douglas at Reputable Systems: http://www.reputable.com/ A useful source of information is the "This Old SGI" document, at http://www.geocities.com/SiliconValley/Pines/2258/4dfaq.html -- Pete Peter Turnbull Dept. of Computer Science University of York