http://www.paranoia.com/~filipg/HTML/LINK/PORTS/F_Keyboard_FAQ.html

Lots of info on PC keyboards and a link to a PIC keyboard source.
I've looked at using a PC keyboard as input device. Haven't had time
to do anything yet, though. Interfacing shouldn't be difficult as
it's a simple serial protocol...

Regards,
Adi

> Has anyone got any source code for connecting AT or PS2 keyboards to pics?
> ... or do I have to write it myself?
>
> The interface keyboards is quite strange and I dont know how to support an
> I/O line which can be either an input or an output at the choice of the
> keyboard.
>
> Does anyone have any help?
>