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BSD 2.11 - man page for lp (bsd section 4)

LP(4)					       Kernel Interfaces Manual 					LP(4)

NAME
lp - line printer
SYNOPSIS
/sys/conf/SYSTEM: NLP lp_printers # Line Printer LP_MAXCOL 132 # Maximum number of columns on line printers /etc/dtab: #Name Unit# Addr Vector Br Handler(s) # Comments lp ? 177514 200 4 lpintr # lp-11 line printer major device number(s): raw: 5 minor device encoding: bit 01 specifies 64-character set (instead of 96-character set) bits 06 are reserved bits 0370 specify line printer unit: <lp_unit> * 8
DESCRIPTION
Lp provides the interface to any of the standard DEC line printers on an LP-11 parallel interface. When it is opened or closed, a suitable number of page ejects is generated. Bytes written are printed. The unit number of the printer is specified by the minor device after removing the low 3 bits, which act as per-device parameters. Currently only the lowest of the low three bits is interpreted: if it is set, the device is treated as having a 64-character set, rather than a full 96-character set. In the resulting half- ASCII mode, lower case letters are turned into upper case and certain characters are escaped according to the following table: { ( } ) ` ' | ! ~ ^ The driver correctly interprets carriage returns, backspaces, tabs, and form feeds. Lines longer than the maximum page width are truncated. The page width is specified via the LP_MAXCOL definition, set to 132 in the GENERIC distribution.
FILES
/dev/lp /dev/MAKEDEV script to create special files /dev/MAKEDEV.local script to localize special files
SEE ALSO
lpr(1), dtab(5), autoconfig(8)
DIAGNOSTICS
None.
BUGS
Although the driver supports multiple printers this has never been tried. 3rd Berkeley Distribution January 28, 1988 LP(4)


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