NAME

lp − line printer

SYNOPSIS

device lp0 at uba0 csr 0177514 vector lpintr

DESCRIPTION

Lp provides the interface to any of the standard DEC line printers.  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 132 characters are truncated (This is a parameter in the driver). 

FILES

/dev/lp

SEE ALSO

lpr(1)

DIAGNOSTICS

None. 

BUGS

Although the driver supports multiple printers this has never been tried.  In any case user-level software support for multiple printers is not available. 

th Berkeley Distribution  —  4/1/81