NAME

iolp − UnTerminal parallel printer interface

DESCRIPTION

The iolp driver is part of the UnTerminal I/O network adapter (IONA) facility.  It provides the support for connecting a line printer to the parallel port of an UnTerminal remote station.  The close waits until all output is competed before returning to the user.  The lp driver allows only one process at a time to write to the printer.  If it is already busy, an open for writing will return an error.  However, the driver allows multiple opens to occur if they are read-only.

When the parallel printer interface is used on a remote station connected to an IONA board, the modem bit is disabled on the serial interface (see iona(7)) for that station. A limitation in the number of wires used by the UnTerminal hardware requires that the modem line be shared by both the asynchronous and the parallel printer interfaces.

FILES

/dev/lp*
/dev/iolp*

SEE ALSO

iona(7), lp(7), vna(7). 

ADDED VALUE

This entry, supplied by INTERACTIVE Systems Corporation, is an extension of UNIX System V. 

\*U  —  Version 1.0