- NetBSD Manual Pages
FDC(4) NetBSD/x86 Kernel Interfaces Manual FDC(4)
Powered by man-cgi (2021-06-01).
Maintained for NetBSD
by Kimmo Suominen.
Based on man-cgi by Panagiotis Christias.
fdc -- NEC 765 floppy disk controller driver
fdc0 at isa? port 0x3f0 irq 6 drq 2
fdc* at acpi?
fdc* at pnpbios? index ?
fd* at fdc? drive ?
The fdc driver provides support for the NEC 765 floppy disk controller
and floppy disk drives, commonly found on IBM-PC compatible systems.
The driver supports the following floppy diskette formats by using par-
1.44MB 3.5-inch (b)
1.2MB 5.25-inch (c)
360KB 5.25-inch (1.2MB drive) (d)
360KB 5.25-inch (IBM-PC drive) (e)
720KB 3.5-inch (f)
720KB 5.25-inch (g)
360KB 3.5-inch (h)
Partition a selects the default format for the attached floppy drive, as
determined by the BIOS configuration for the diskette drive.
The driver supports floppy disk formatting using the interfaces in
FDIOCGETFORMAT struct fdformat_parms
Fetch current formatting parameters. This gets the
default parameters for the open device if no parame-
ters have been set during the session.
FDIOCSETFORMAT struct fdformat_parms
Set formatting parameters. The driver saves this
state and it persists while the device is open.
FDIOCFORMAT_TRACK struct fdformat_cmd
Format a track on the medium. If this call returns
EINVAL, the track formatting parameters were out of
range for the medium. If it returns EIO, there was a
medium error while formatting the track.
FDIOCSETOPTS int Set driver options which persist until the device is
closed. The options should be the logical OR of the
desired values below:
FDOPT_NORETRY Do not retry operations on failure
FDOPT_SILENT Do not print error messages to the con-
FDIOCGETOPTS int Fetch drive options.
A typical use of the formatting facilities would be to open the device,
call FDIOCGETFORMAT to fetch the current format parameters, perhaps
change a parameter or two, display the formatting details to the user,
and then call FDIOCSETFORMAT followed by a series of calls to
fdformat(1), acpi(4), isa(4), pnpbios(4)
The fdc formatting support appeared in NetBSD 1.3.
NetBSD 9.2 September 23, 2011 NetBSD 9.2