Homebrew PCBs

I have found the PCL language reference attached with old printer 
manuals.  I have seen them on the internet before, probably in the HP 
7445 or 7550 plotter manuals.

But if your using a laser printer, it simply prints what you print in 
windows - if you print a circuit board pattern thats what prints out.  
If you modify the laserjet in any way - and if whatever your doing 
works, it will rastorize just as it normally does using the windows 
printer driver without having to learn the PCL programming language.