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+.\"	$NetBSD: mmem.4,v 1.5 2017/02/17 22:24:46 christos Exp $
+.\"
+.\" Copyright (c) 2002 The NetBSD Foundation, Inc.
+.\" All rights reserved.
+.\"
+.\" This code is derived from software contributed to The NetBSD Foundation
+.\" by ITOH Yasufumi.
+.\"
+.\" 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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 February 17, 2017
+.Dt MMEM 4 dreamcast
+.Os
+.Sh NAME
+.Nm mmem
+.Nd Maple bus storage device driver
+.Sh SYNOPSIS
+.Cd "mmem* at maple? port ? subunit ?"
+.Sh DESCRIPTION
+The
+.Nm
+driver provides support for Maple bus storage devices (memory cards).
+.Sh IOCTLS
+The following
+.Xr ioctl 2
+calls apply to Maple bus storage devices.
+.Pp
+.Bl -tag -width XXXXXXX
+.It Dv DIOCGDINFO Fa struct disklabel
+Read, from the kernel, the
+.Xr disklabel 5
+of the device.
+.El
+.Pp
+In addition, Maple bus storage devices accept all
+.Xr ioctl 2
+calls described in
+.Xr dreamcast/maple 4 .
+.Sh FILES
+.Bl -tag -width /dev/rmmemX.XXXX -compact
+.It Pa /dev/mmem Ns Ar u . Ns Ar tp
+block mode
+Maple bus storage device unit
+.Ar u ,
+.\" t is actually ``partition'' but confusing
+PT number
+.Ar t
+(usually 0 only), partition
+.Ar p
+.It Pa /dev/rmmem Ns Ar u . Ns Ar tp
+raw mode
+Maple bus storage device unit
+.Ar u ,
+.\" t is actually ``partition'' but confusing
+PT number
+.Ar t
+(usually 0 only), partition
+.Ar p
+.El
+.Sh SEE ALSO
+.Xr ioctl 2 ,
+.Xr dreamcast/maple 4 ,
+.Xr disklabel 5
+.Sh HISTORY
+The
+.Nm
+device driver appeared in
+.Nx 2.0 .