Date   : Mon, 05 Jan 2015 21:07:08 +0000
From   : public@... (Daniel Beardsmore)
Subject: Serial console active at power-on

(Quoting myself! ;)

> I assume that the keyboard controller code is actually inside MOS
> itself, which uses the system VIA to communicate with the chips on
> the keyboard PCB.

Having read that page John posted, it's both more and less complicated and
strange. The keyboard is capable of figuring out for itself *when* a key
was pressed, but then forgets what it was and makes the computer figure it
out for itself :P

I don't know quite honestly when dedicated controller chips came into being,
that just did all this for you in a single chip. Something I need to research
one day.