Introduction - If you have any usage issues, please Google them yourself
In this example we will interface the PS/2 port to a PS/2 keyboard, also known as
an AT keyboard. The example will not apply to the newer USB keyboards, or to the
older, obsolete XT keyboard. Keyboards contain their own microprocessors that
continually scan the keys and then send the resulting key pressings to the host – in our
case through the PS/2 port.