.TH LPT 3 .SH NAMElpt \- parallel port interface.SH SYNOPSIS.nf.B bind -a #L[123] /dev .B /dev/lpt[123]data.B /dev/lpt[123]dlr.B /dev/lpt[123]pcr.B /dev/lpt[123]psr.fi.SH DESCRIPTIONThe.I lptdriver provides an interface to the parallelinterface normally used for printers.The specifiers.BR 1 ,.BR 2 ,and.BR 3correspond tothe parallel interfaces at PC ports 0x378, 0x3bc, and 0x278respectively..PP.B Lpt?datais write only.Writing to it sends data to the interface.This file is sufficient for communicating with most printers..PP.BR Lpt?dlr ,.BR lpt?pcr ,and.B lpt?psrare used for fine control of the parallel port.Reading or writing these files corresponds toreading and writing the data latch register,printer control register, and printer statusregister.These are used by programs to drive special devices.The data is written as a hexadecimal(leading.BR 0x ),octal(leading.BR 0 )or decimal number.Reads return a hexadecimal number representing the value of the register..SH SOURCE.B /os/*/devlpt.c