The PS/2 controller code for Unicomp's current generation PS/2 keyboard
sends the wrong scancodes when Ctrl + Pause (which should be Break) is
pressed.
Instead of it sending the Break sequence...
E0 7E E0 F0 7E
... representing a press of Scroll Lock, which is Break because Ctrl is
being pressed, it instead sends...
E0 77
... representing a press of Num Lock, which is just the old way of
getting Pause.
Since the E0 77 coming from the controller is not a normal sequence,
this workaround does not interfere with Ctrl + Num Lock, which still
Pauses as it should.
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