NAME    [Toc]    [Back]

     lpt - parallel port driver

SYNOPSIS    [Toc]    [Back]

     # alpha/i386
     lpt0 at isa? port 0x378 irq 7
     lpt1 at isa? port 0x278
     lpt2 at isa? port 0x3bc

     # hppa
     lpt0 at gsc? irq 7

     # sparc64
     lpt* at apio?
     lpt* at ebus?

DESCRIPTION    [Toc]    [Back]

     This driver provides access to parallel ports.

     The highest bit in the minor (bit 7, or add 128) number  selects whether
     to  do  polling or wait for interrupts.  If no IRQ is specified in the kernel
 configuration, or the IRQ specified is not available  at
attach time,
     only the polling device may be used.

     The  next  lower bit (bit 6, or add 64) indicates the driver
should avoid
     initializing the printer.

     The next lower bit (bit 5, or  add  32)  requests  that  the
driver do automatic
 LF generation when printing CRs.

FILES    [Toc]    [Back]

     /dev/lpt0  first interrupt-driven parallel port device
     /dev/lpa0  first polled parallel port device

SEE ALSO    [Toc]    [Back]

     intro(4), isa(4), ulpt(4)

OpenBSD      3.6                          August      6,     1993