>You may want to take a look at the Linux sources, I believe it does PLIP.
>FreeBSD might also, but I don't remember...

You may want to look at NetBSD/pc532.  It does PLIP.

-- 
Phil Nelson                       NetBSD: http://www.netbsd.org
e-mail: phil@cs.wwu.edu           LPF: http://www.lpf.org
http://www.cs.wwu.edu/~phil       !gifs: http://www.lpf.org/Patent/Gif/Gif.html