7 device refers to the line printer attached to the parallel port. Any byte
8 written to this device is printed. Only one process may have the device
13 call may return with a smaller count then the number of bytes requested to
14 write. The next write call is then likely to fail with the error code
16 if the printer is out of paper, or
18 if the printer is turned off.
26 Only one parallel port is supported.
28 Kees J. Bot (kjb@cs.vu.nl)