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Annotation of lucent/sys/man/3/lpt, revision 1.1.1.1

1.1       root        1: .TH LPT 3 
                      2: .SH NAME
                      3: lpt \- parallel port interface for PC's
                      4: .SH SYNOPSIS
                      5: .nf
                      6: .B bind -a #L[123] /dev
                      7: 
                      8: .B /dev/lpt[123]data
                      9: .B /dev/lpt[123]dlr
                     10: .B /dev/lpt[123]pcr
                     11: .B /dev/lpt[123]psr
                     12: .fi
                     13: .SH DESCRIPTION
                     14: The
                     15: .I lpt
                     16: driver provides an interface to the parallel
                     17: interface normally used for printers.
                     18: The specifiers
                     19: .BR 1 ,
                     20: .BR 2 ,
                     21: and
                     22: .BR 3
                     23: correspond to
                     24: the parallel interfaces at PC ports 0x3bc, 0x378, and 0x278
                     25: respectively.
                     26: .PP
                     27: .B Lpt?data
                     28: is write only.
                     29: Writing to it sends data to the interface.
                     30: This file is sufficient for communicating with most printers.
                     31: .PP
                     32: .BR Lpt?dlr ,
                     33: .BR lpt?pcr ,
                     34: and
                     35: .B lpt?psr
                     36: are used for fine control of the parallel port.
                     37: Reading or writing these files corresponds to
                     38: reading and writing the data latch register,
                     39: printer control register, and printer status
                     40: register.
                     41: These are used by programs to drive special devices.
                     42: .SH SOURCE
                     43: .B /sys/src/9/pc/devlpt.c

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