LP(7) RISC/os Reference Manual LP(7)
NAME
lp - parallel port/line printer interface
SYNOPSIS
VECTOR: module=lp vector=0x12 ipl=0 unit=0 base=000
DESCRIPTION
The parallel port is a Centronics compatible interface used
for output to a line printer.
The raw device sends all characters out the port unmodified.
The canonical device attempts to manage column and line
position, handling backspaces, carriage returns, linefeeds
and formfeeds for "dumb" printers. The capitalize device
converts lowercase characters to uppercase and prints cer-
tain special characters as other characters with over-
strikes, as well as canonizing, for "really dumb" printers
which cannot print the entire ascii set.
FILES
/dev/rlp0 raw device
/dev/lp0 canonical device
/dev/Lp0 capitalize device
DIAGNOSTICS
lp0: not ready Printer not ready.
lp0: not cabled correctly
Hardware detected no cable.
lp0: out of paper Printer out of paper.
lp0: not selected (offline)
Printer not online.
lp0: not responding Printer not responding with ack-
nowledge.
lp0: Stray Interrupt An unexpected interrupt was
received while device was not
active. System error.
Printed 11/19/92 Page 1