projects / dragonfly.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 $ | |
| 28 | .\" | |
| dd7331fe | 29 | .Dd June 20, 2015 |
| 984263bc MD |
30 | .Dt FDC 4 |
| 31 | .Os | |
| 32 | .Sh NAME | |
| 33 | .Nm fdc | |
| 34 | .Nd PC architecture floppy disk controller driver | |
| 35 | .Sh SYNOPSIS | |
| 36 | .Cd "device fdc0 at isa? port IO_FD1 flags 0x1 irq 6 drq 2" | |
| 37 | .Cd device fd0 at fdc0 drive 0 | |
| 38 | .Cd device fd1 at fdc0 drive 1 | |
| 39 | .Sh DESCRIPTION | |
| 40 | This driver provides access to floppy disk drives and QIC40/80 tapedrives. | |
| 41 | In /dev for each floppy device a number of minor devices are present. | |
| 42 | The | |
| 43 | /dev/fd* devices with trailing alphabetic characters are used to indicate | |
| 44 | .Sq partitions | |
| 45 | on the floppy disk. | |
| 46 | The /dev/fd*.<number> are devices that | |
| 47 | indicate the size of the floppy disk (so: 720kB, 1440kB etc). The latter | |
| 48 | are used for formatting disks using fdformat or for accessing different | |
| 49 | density disks in multidensity drive. | |
| 50 | Example: 720kB disk in a 1.44Mb drive. | |
| 51 | .Pp | |
| 52 | Normally, the driver will ask the system's CMOS memory to obtain the | |
| 53 | floppy drive configuration. Some machines do not store any form of a | |
| 54 | configuration value in their CMOS. Use the flags value | |
| 55 | .Ql 0x1 | |
| 56 | to pretend a 1.44 MB floppy drive as the first unit, without asking the | |
| 57 | CMOS for it. | |
| 58 | .Pp | |
| 984263bc MD |
59 | Normally, the device driver detects FDC chipsets that have an internal |
| 60 | FIFO, and enables the FIFO on them. There is a slight chance that this | |
| 61 | feature is actually misdetected (seen on an IBM Thinkpad 755c), so it | |
| 62 | can be turned off using flags | |
| 63 | .Ql 0x4 . | |
| 64 | .Sh FILES | |
| 65 | .Bl -tag -width Pa -compact | |
| 66 | .It Pa /dev/fd* | |
| 67 | floppy disk device nodes | |
| 68 | .It Pa /dev/fd*. Ns Ar "<size in kB>" | |
| 69 | floppy disk device nodes where the trailing number indicates the floppy | |
| 70 | capacity | |
| dd7331fe | 71 | .It Pa /sys/config/X86_64_GENERIC |
| 984263bc | 72 | sample generic kernel config file |
| fc29bf55 | 73 | .It Pa /sys/dev/disk/fd/fd.c |
| 984263bc MD |
74 | floppy driver source |
| 75 | .El | |
| 76 | .Sh SEE ALSO | |
| 77 | .Xr fdformat 1 , | |
| 78 | .Xr disktab 5 |