The parallel device provides a hardware-independent interface to the
Amiga's Centronics-compatible parallel port. The primary use of the Amiga
parallel port is for output to printers, but with its extensions for
bi-directional I/O, it can also be used for communication with digitizers
and high-speed links with other computers.  The parallel device is based
on the conventions of Exec device I/O, with extensions for parameter
setting and control.

 Parallel Device Commands and Functions 
 Device Interface 
 Ending A Read or Write with Termination Characters 
 Setting Parallel Parameters 
 Querying the Parallel Device 
 Additional Information on the Parallel Device