1.\" $NetBSD: iwm.4,v 1.8 2002/01/15 01:47:22 wiz Exp $ 2.\" $Id: iwm.4,v 1.8 2002/01/15 01:47:22 wiz Exp $ 3.\" 4.\" Copyright (c) 1997, 1998 Hauke Fath. All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 3. The name of the author may not be used to endorse or promote products 15.\" derived from this software without specific prior written permission. 16.\" 17.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 18.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 19.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 20.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 21.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27.\" POSSIBILITY OF SUCH DAMAGE. 28.\" 29.Dd June 6, 1998 30.Dt IWM 4 mac68k 31.Os 32.Sh NAME 33.Nm iwm , 34.Nm fd 35.Nd floppy disk driver for IWM and non-DMA SWIM controllers 36.Sh SYNOPSIS 37.Cd "iwm0 at obio?" 38.Cd "fd* at iwm0 drive ?" 39.Sh DESCRIPTION 40The 41.Nm 42driver interfaces to the built-in and external floppy disk drives on the 43Macintosh. It supports double-density media, written in 44Apple's proprietary GCR format. Currently, there is no disklabel 45support for the floppy drives. Instead, the 46.Nm 47driver sets up a fake in-core disklabel, using the minor device 48number to select from the supported disk formats. 49.Pp 50The following formats are supported: 51.Bl -column header Partition Size sides tracks sectors/track 52.Sy "Partition Size sides tracks sectors/track" 53 a 800Kb 2 80 10 (default) 54 b 400Kb 1 80 10 55 c 800Kb 2 80 10 56.El 57.Pp 58(The above table describes the logical mapping as implemented by the 59driver; the physical layout of GCR floppies has 8..12 sectors per track.) 60.Sh FORMATTING 61The 62.Nm 63driver does currently not support floppy disk formatting. 64.Sh SEE ALSO 65Apple Computer, Inc.: "Inside Macintosh", Vol III-33f. (Addison-Wesley) 66.Pp 67Apple Computer, Inc.: "New Technical Notes DV 17 - Sony Driver" 68.Pp 69Neil Parker: "iwmstuff" 70.Pp 71.Xr eject 1 72.Sh HISTORY 73The 74.Nm 75interface first appeared in 76.Nx 1.4 . 77.Sh AUTHORS 78Hauke Fath put together the beginnings of the 79.Nm 80driver in 1996 from the sparse documentation in "Inside Macintosh", 81Neil Parker's "iwmstuff" documentation for the Apple IIgs and a long, 82hard look at the .Sony driver. 83.Sh BUGS 84The FFS code is incapable of dealing with a varying number of 85sectors per track. We have to fake a mapping and so lose FFS support 86for hardware parameters like transition times. 87.Pp 88The driver only supports an obsolete format. 89