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LPT(4)                   BSD Kernel Interfaces Manual                   LPT(4)

NAME
     lpt -- parallel port driver

SYNOPSIS
     # 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
     lpt0 at ssio?

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

DESCRIPTION
     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 ker-
     nel 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 auto-
     matic LF generation when printing CRs.

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

SEE ALSO
     intro(4), isa(4), ulpt(4)

BSD                              June 20, 2007                             BSD