Parallel port support.

[Alex deVries <adevries@engsoc.carleton.ca>]

I've never seen any documentation of the parallel port that hangs off of
the pbus; does anyone know:
- what kind of chip it is
- how it hangs off of the pbus?

I'm thinking this is a pretty easy device driver to write for testing that
the pbus code works well.  It'd help out with HAL2 support.

- Alex

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Alex deVries, puffin on LinuxNet.
I know exactly what I want in life.