Update manual page.

Give 8" example for the heck of it.
This commit is contained in:
Poul-Henning Kamp 2004-02-25 13:55:56 +00:00
parent ea2937efb8
commit 3531b6f13a
Notes: svn2git 2020-12-20 02:59:44 +00:00
svn path=/head/; revision=126234

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@ -276,31 +276,30 @@ as opposed to a
so it is independent from the actual subdevice being used for
.Ar device .
.Bd -literal
$ fdcontrol -v /dev/fd1.360
/dev/fd1.360: 1.2M drive (5.25" high-density)
.Ed
$ fdcontrol -v /dev/fd0
/dev/fd0: 1.44M drive (3.5" high-density)
.\" " <- this one is for Emacs :)
.Pp
Inquiry about the density settings of a particular subdevice.
Inquiry about the density settings
.Bd -literal
$ fdcontrol -F /dev/fd0.720
$ fdcontrol -F /dev/fd0
18,512,0xff,0x1b,80,500,2,0x6c,1,0,+mfm
.Ed
.Pp
Note that just accessing a new subdevice for the first time will clone
this device using the default density settings for the drive type, as
explained in
.Xr fdc 4 .
Thus, albeit the device name in the example above suggests a 720 KB
media density, it has actually been initialized (by the driver) to
1440 KB.
So, in order to adjust it for standard 720 KB double-density
media, one of the following
.Nm
commands needs to be run:
The verbose flag makes this human readable
.Bd -literal
# fdcontrol -s 9,,,0x20,,250,,0x50 /dev/fd0.720
# fdcontrol -f 720 /dev/fd0.720
/dev/fd0: 1440 KB media type
Format: 18,512,0xff,0x1b,80,500,2,0x6c,1,0,+mfm
Sector size: 512
Sectors/track: 18
Heads/cylinder: 2
Cylinders/disk: 80
Transfer rate: 500 kbps
Sector gap: 27
Format gap: 108
Interleave: 1
Side offset: 0
Flags <MFM>
.Ed
.Pp
As indicated, trailing commas in the parameter list may be omitted.
@ -313,7 +312,15 @@ capable of handling FM encoding at all.)
.Bd -literal
# fdcontrol -s 16,128,0x80,0x2,40,300,,0x10,,,-mfm,+2step /dev/fd1.1
.Ed
.Sh SEE ALSO
.Pp
It is still possible to hook up 8" drives to most modern floppy
controllers, given the right cable magic.
(On PC hardware, tell the bios that it is a 5.25" drive)
The classical 128/26/2/77 format can be read with this entry
.Bd -literal
fdcontrol -s 26,128,0x80,0x2,77,500,2,0x10,,,-mfm /dev/fd0
.Ed
Sh SEE ALSO
.Xr fdc 4
.Sh HISTORY
The