lpt(4) - NetBSD Manual Pages

LPT(4)               NetBSD/pc532 Kernel Interfaces Manual              LPT(4)


NAME

     lpt - Centronics parallel port


SYNOPSIS

     lpt0 at mainbus? addr ? irq ?
     lpt1 at mainbus? addr ? irq ?


DESCRIPTION

     This driver provides access to Centronics parallel ports.

     Bit 6 in the minor number selects whether to omit pulling /PRIME low on
     opens or not.  If the minor has bit 5 set, AUTOLINEFEED will be asserted
     when transferring data to the printer.

     Address and IRQ default to 0xffc80030,7 for lpt0 and to 0xffc80034,6 for
     lpt1.


FILES

     /dev/lpt0                         first parallel port device
     /dev/lpt1                         second parallel port device


DIAGNOSTICS

     lpt?: out of paper  The printer asserted the Paper Empty signal.

     lpt?: offline  The printer did not assert the Select signal.

     lpt?: output error  The printer asserted the /Error signal.

     lpt?: NACK low  The printer didn't release the /Ack signal.

     lpt?: NBUSY low  The printer didn't release the Busy signal.


SEE ALSO

     plip(4)

     Contact Matthias Pfaller <leo@dachau.marco.de> to get instructions on
     building a Centronics interface for your pc532.


HISTORY

     The lpt driver appeared in NetBSD 1.0.

NetBSD 2.1                     December 1, 1994                     NetBSD 2.1