When I say "push-on-a-chip" keyboard adapter...
Its a chip socket type external keyboard adpater, this one being made by Individual Computers.
The socket pushes down onto a chip on the motherboard and lets you attach an external keyboard. From what I can remeber they also allow multiple key presses. The one I've got seems to have been sold by Power Computing, but I've no idea how to fit it (I seem to recall it fitted over the Lisa chip?)
Any ideas?
And thanks for the help people!!
Jason