feat: Added NetBSD man pages

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+.\"	$NetBSD: ptcd.4,v 1.5 2013/07/20 21:39:58 wiz Exp $
+.\"
+.\" Copyright (c) 2012 Marc Balmer <marc@msys.ch>
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+.\"
+.Dd December 17, 2012
+.Dt PTCD 4
+.Os
+.Sh NAME
+.Nm ptcd
+.Nd support for the Protech PS3100 cash drawer port
+.Sh SYNOPSIS
+.Cd "ptcd* at isa? port 0x48d"
+.Cd "gpio* at ptcd?"
+.Sh DESCRIPTION
+The
+.Nm
+driver controls the cash drawer port of the Protech PS3100 point of sale
+terminal using the GPIO subsystem.
+.Pp
+.Nm
+provides a GPIO device with two pins: pin 0 is used to control the cash drawer
+while pin 1 can be used to read the current state of the sense input pin.
+A logical 0 means the cash drawer is closed, a logical 1 means the cash drawer
+is open.
+.Pp
+To open the cash drawer, set pin 0 to logical 1 for a short period
+of time (e.g. < 1 sec) and then reset the pin to logical 0.
+.Sh SEE ALSO
+.Xr gpio 4 ,
+.Xr ibmcd 4 ,
+.Xr gpioctl 8
+.Sh HISTORY
+The
+.Nm
+driver first appeared in
+.Nx 6.1 .
+.Sh AUTHORS
+.An -nosplit
+The
+.Nm
+driver was written by
+.An Marc Balmer Aq Mt marc@msys.ch .
+.Sh CAVEATS
+As it is not possible to detect the hardware at runtime, this driver, when
+enabled, will always attach.
+Only enable it in your kernel configuration if you have the proper hardware.