lp(4)lp(4)Namelp - LP11 line printer interface
device lp0 at uba0 csr 0177514 flags 0x???? vector lpintr
The provides the interface to any of the standard DIGITAL line printers
on an LP11 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. 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-charac‐
ter set. In the resulting half-ASCII mode, lowercase letters are
turned into uppercase and certain characters are approximated according
to the following table:
Character Printer Approximation
The driver correctly interprets carriage returns, backspaces, tabs, and
form feeds. Lines longer than the maximum page width are truncated.
The default page width is 132 columns. This can be overridden by spec‐
ifying, for example, ``flags 0xff'' .