Apple ][e mod -- keyboard converter needed

[Rob Gibson <nosbig@nosbig.net>]

I want to do an Apple ][e mod, replacing the contents of the system with a 
modern PC.  The motherboard I am considering uses PS/2 connectors, but I 
would like to retain the original Apple keyboard.  What would be necessary 
to convert the scancodes from the Apple ][e keyboard to a PS/2 signal?  
Would I need a small PROM, programmed with the conversion table or could I 
do this in software?  Would examining an emulator's source code help in 
this task?  For now, I can just hook up a standard keyboard through the 
back of the system, but any hints or help would be appreciated.

Thanks in advance,
Rob