Fix file-/pathnames which have changed now.
[dragonfly.git] / share / man / man4 / fdc.4
CommitLineData
984263bc
MD
1.\"
2.\" Copyright (c) 1994 Wilko Bulte
3.\" All rights reserved.
4.\"
5.\" Redistribution and use in source and binary forms, with or without
6.\" modification, are permitted provided that the following conditions
7.\" are met:
8.\" 1. Redistributions of source code must retain the above copyright
9.\" notice, this list of conditions and the following disclaimer.
10.\" 2. Redistributions in binary form must reproduce the above copyright
11.\" notice, this list of conditions and the following disclaimer in the
12.\" documentation and/or other materials provided with the distribution.
13.\" 3. The name of the author may not be used to endorse or promote products
14.\" derived from this software without specific prior written permission
15.\"
16.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26.\"
27.\" $FreeBSD: src/share/man/man4/fdc.4,v 1.20.2.5 2001/10/01 13:07:23 dd Exp $
23e12d00 28.\" $DragonFly: src/share/man/man4/fdc.4,v 1.3 2006/10/24 17:09:45 swildner Exp $
984263bc
MD
29.\"
30.Dd August 31, 1994
31.Dt FDC 4
32.Os
33.Sh NAME
34.Nm fdc
35.Nd PC architecture floppy disk controller driver
36.Sh SYNOPSIS
37.Cd "device fdc0 at isa? port IO_FD1 flags 0x1 irq 6 drq 2"
38.Cd device fd0 at fdc0 drive 0
39.Cd device fd1 at fdc0 drive 1
40.Sh DESCRIPTION
41This driver provides access to floppy disk drives and QIC40/80 tapedrives.
42In /dev for each floppy device a number of minor devices are present.
43The
44/dev/fd* devices with trailing alphabetic characters are used to indicate
45.Sq partitions
46on the floppy disk.
47The /dev/fd*.<number> are devices that
48indicate the size of the floppy disk (so: 720kB, 1440kB etc). The latter
49are used for formatting disks using fdformat or for accessing different
50density disks in multidensity drive.
51Example: 720kB disk in a 1.44Mb drive.
52.Pp
53Normally, the driver will ask the system's CMOS memory to obtain the
54floppy drive configuration. Some machines do not store any form of a
55configuration value in their CMOS. Use the flags value
56.Ql 0x1
57to pretend a 1.44 MB floppy drive as the first unit, without asking the
58CMOS for it.
59.Pp
60The flags value
61.Ql 0x2
62is reserved for PCMCIA floppy use, and should never be set in a
63configuration file directly. It is internally handled in the driver
64if the compilation option
65.Dv FDC_YE
66is set, and defers device probing.
67.Pp
68Normally, the device driver detects FDC chipsets that have an internal
69FIFO, and enables the FIFO on them. There is a slight chance that this
70feature is actually misdetected (seen on an IBM Thinkpad 755c), so it
71can be turned off using flags
72.Ql 0x4 .
73.Sh FILES
74.Bl -tag -width Pa -compact
75.It Pa /dev/fd*
76floppy disk device nodes
77.It Pa /dev/fd*. Ns Ar "<size in kB>"
78floppy disk device nodes where the trailing number indicates the floppy
79capacity
23e12d00 80.It Pa /sys/config/GENERIC
984263bc
MD
81sample generic kernel config file
82.It Pa /sys/isa/fd.c
83floppy driver source
84.El
85.Sh SEE ALSO
86.Xr fdformat 1 ,
87.Xr disktab 5