lpt man page on OpenBSD

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LPT(4)			  OpenBSD Programmer's Manual			LPT(4)

     lpt - parallel port driver

     # 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?

     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.

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

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

OpenBSD 4.9			 June 20, 2007			   OpenBSD 4.9

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