diff options
Diffstat (limited to 'static/plan9-4e/man3/lpt.3')
| -rw-r--r-- | static/plan9-4e/man3/lpt.3 | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/static/plan9-4e/man3/lpt.3 b/static/plan9-4e/man3/lpt.3 new file mode 100644 index 00000000..a8df37dd --- /dev/null +++ b/static/plan9-4e/man3/lpt.3 @@ -0,0 +1,43 @@ +.TH LPT 3 +.SH NAME +lpt \- parallel port interface for PC's +.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 DESCRIPTION +The +.I lpt +driver provides an interface to the parallel +interface normally used for printers. +The specifiers +.BR 1 , +.BR 2 , +and +.BR 3 +correspond to +the parallel interfaces at PC ports 0x3bc, 0x378, and 0x278 +respectively. +.PP +.B Lpt?data +is 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?psr +are used for fine control of the parallel port. +Reading or writing these files corresponds to +reading and writing the data latch register, +printer control register, and printer status +register. +These are used by programs to drive special devices. +.SH SOURCE +.B /sys/src/9/pc/devlpt.c |