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Add the missing iwm(4) man page.

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scottr 1999-02-23 14:52:02 +00:00
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.\" $Id: iwm.4,v 1.1 1999/02/23 14:52:02 scottr Exp $
.\"
.\" Copyright (c) 1997, 1998 Hauke Fath. All rights reserved.
.\"
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.\" modification, are permitted provided that the following conditions
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.\" notice, this list of conditions and the following disclaimer in the
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.\" 3. The name of the author may not be used to endorse or promote products
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.\"
.\" 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
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.\"
.Dd June 6, 1998
.Dt IWM 4 mac68k
.Os NetBSD
.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 header Partition Size sides tracks sectors/track
.Sy "Partition Size sides tracks sectors/track"
a 800Kb 2 80 10 (default)
b 400Kb 1 80 10
c 800Kb 2 80 10
.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
.\" Cross-references should be ordered by section (low to high), then in
.\" alphabetical order.
.Xr eject 1 .
.Pp
Neil Parker: "iwmstuff"
.Pp
Apple Computer, Inc.: "Inside Macintosh", Vol III-33f. (Addison-Wesley)
.Pp
Apple Computer, Inc.: "New Technical Notes DV 17 - Sony Driver"
.\"
.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.