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+.\"	$NetBSD: atppc.4,v 1.16 2018/08/31 19:36:28 sevan Exp $
+.\"
+.\" Copyright (c) 1998, 1999, Nicolas Souchu
+.\" Copyright (c) 2003, 2004 Gary Thorpe <gathorpe@users.sourceforge.net>
+.\" 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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 August 31, 2018
+.Dt ATPPC 4
+.Os
+.Sh NAME
+.Nm atppc
+.Nd driver for AT-style parallel port chip sets
+.Sh SYNOPSIS
+.Cd "atppc* at acpi?"
+.Cd "atppc* at isa? port 0x378 irq 7 drq 3 flags 0x00"
+.Cd "atppc* at isapnp?"
+.Cd "atppc* at ofisa?"
+.Cd "atppc* at pnpbios? index ?"
+.Cd "atppc* at puc? port ?"
+.Cd options ATPPC_VERBOSE
+.Cd options ATPPC_DEBUG
+.Sh DESCRIPTION
+.Nm
+supports parallel ports and provides the low level support needed
+by higher level drivers such as
+.Xr ppbus 4 .
+This driver attaches where the traditional
+.Nx
+.Xr lpt 4
+driver would ordinarily.
+It provides the data transport and chip set manipulation needed by
+higher driver layers, such as
+.Xr ppbus 4
+and
+.Xr lpt 4 .
+This driver is designed to be one of many possible implementations
+supporting machine independent parallel device support via
+.Xr ppbus 4 .
+.Ss IEEE 1284 support
+.Nm
+is intended to provide to data-link like services to higher level
+IEEE 1284 device drivers (such as
+.Xr ppbus 4 ) .
+.Nm
+does not directly support IEEE 1284 features such as mode negotiation
+but rather provides the necessary infrastructure to allow a higher
+level driver to provide these services.
+.Pp
+.Nm
+does provide chip set manipulation, device handshakes (where
+appropriate), low-level error detection, and data transfer.
+.Ss Supported data transfer modes
+.Nm
+supports the following data transfer modes: Centronics Compatible
+(Standard), Nibble, Byte (PS2), Fast Centronics, ECP, and EPP.
+Standard and Fast Centronics modes are write only, Nibble and Byte
+modes are read only, and ECP and EPP modes are bidirectional.
+.\" .Sh FILES
+.\" .Sh EXAMPLES
+.Sh SEE ALSO
+.Xr acpi 4 ,
+.Xr i386/pnpbios 4 ,
+.Xr isa 4 ,
+.Xr isapnp 4 ,
+.Xr lpt 4 ,
+.Xr ofisa 4 ,
+.Xr ppbus 4 ,
+.Xr puc 4
+.Sh HISTORY
+The
+.Nm
+driver is based on the
+.Nm ppc
+driver, which originally appeared in
+.Fx .
+The driver was ported over in
+.Nx 2.0 .
+.Sh AUTHORS
+This manual page is based on the
+.Fx
+.Nm ppc
+manual page.
+The information has been updated for the
+.Nx
+port by
+.An "Gary Thorpe" .
+.Sh BUGS
+The
+.Fx
+driver includes support for some specific chip sets, specifically
+detection of some non-standard device I/O locations on the ISA bus.
+This support was not ported over to the
+.Nx
+version of the driver yet.