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+.\"	$NetBSD: neptune.4,v 1.9 2017/02/18 22:39:01 wiz Exp $
+.\"
+.\" Copyright (c) 1998 MINOURA Makoto
+.\" Copyright (c) 1998 NetBSD Foundation, Inc.
+.\" 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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"    This product includes software developed by Minoura Makoto.
+.\" 4. The name of the author may not be used to endorse or promote products
+.\"    derived from this software without specific prior written permission
+.\"
+.\" 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 February 17, 2017
+.Dt NEPTUNE 4 x68k
+.Os
+.Sh NAME
+.Nm neptune
+.Nd Neptune-X ISA bridge driver
+.Sh SYNOPSIS
+.Cd "neptune0 at intio0 addr 0xece000 irq 239"
+.Cd "ne0 at neptune? addr 0x300"
+.Sh DESCRIPTION
+The Neptune-X is a Ethernet interface card initially designed by
+Hirofumi Shimada, which uses popular NE2000 or its clone with its
+own x68k-proprietary bus to ISA bus bridge.
+.Pp
+The
+.Nx
+.Nm
+driver takes charge of the ISA bridge part of the Neptune-X.
+It is implemented as a more generic `bus' with its own
+.Xr bus_space 9
+interface, and is intended to be used with
+.Xr ne 4
+driver.
+.Sh SEE ALSO
+.Xr isa 4 ,
+.Xr ne 4 ,
+.Xr x68k/intro 4 ,
+.Xr bus_space 9
+.Sh HISTORY
+The
+.Nm
+device appeared in
+.Nx 1.4 .
+.Sh BUGS
+.Nm
+itself is always detected when it is specified in the kernel config file.
+This is because the Neptune-X ISA bridge is transparent to software.
+The attached device is detected appropriately.