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+.\" $NetBSD: iwm.4,v 1.9 2009/03/15 11:34:53 joerg Exp $
+.\"	$Id: iwm.4,v 1.9 2009/03/15 11:34:53 joerg Exp $
+.\"
+.\" Copyright (c) 1997, 1998 Hauke Fath.  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. 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 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 June 6, 1998
+.Dt IWM 4 mac68k
+.Os
+.Sh NAME
+.Nm iwm ,
+.Nm fd
+.Nd floppy disk driver for IWM and non-DMA SWIM controllers
+.Sh SYNOPSIS
+.Cd "iwm0 at obio?"
+.Cd "fd* at iwm0 drive ?"
+.Sh DESCRIPTION
+The
+.Nm
+driver interfaces to the built-in and external floppy disk drives on the
+Macintosh. It supports double-density media, written in
+Apple's proprietary GCR format. Currently, there is no disklabel
+support for the floppy drives. Instead, the
+.Nm
+driver sets up a fake in-core disklabel, using the minor device
+number to select from the supported disk formats.
+.Pp
+The following formats are supported:
+.Bl -column Partition Size sides tracks sectors/track
+.It Sy Partition Ta Sy Size Ta Sy sides Ta Sy tracks Ta Sy sectors/track
+.It a Ta 800Kb Ta 2 Ta 80 Ta 10 (default)
+.It b Ta 400Kb Ta 1 Ta 80 Ta 10
+.It c Ta 800Kb Ta 2 Ta 80 Ta 10
+.El
+.Pp
+(The above table describes the logical mapping as implemented by the
+driver; the physical layout of GCR floppies has 8..12 sectors per track.)
+.Sh FORMATTING
+The
+.Nm
+driver does currently not support floppy disk formatting.
+.Sh SEE ALSO
+Apple Computer, Inc.: "Inside Macintosh", Vol III-33f. (Addison-Wesley)
+.Pp
+Apple Computer, Inc.: "New Technical Notes DV 17 - Sony Driver"
+.Pp
+Neil Parker: "iwmstuff"
+.Pp
+.Xr eject 1
+.Sh HISTORY
+The
+.Nm
+interface first appeared in
+.Nx 1.4 .
+.Sh AUTHORS
+Hauke Fath put together the beginnings of the
+.Nm
+driver in 1996 from the sparse documentation in "Inside Macintosh",
+Neil Parker's "iwmstuff" documentation for the Apple IIgs and a long,
+hard look at the .Sony driver.
+.Sh BUGS
+The FFS code is incapable of dealing with a varying number of
+sectors per track. We have to fake a mapping and so lose FFS support
+for hardware parameters like transition times.
+.Pp
+The driver only supports an obsolete format.