NAME
fdc
- NEC 765 floppy disk controller driver
SYNOPSIS
fdc0 at isa? port 0x3f0 irq 6 drq 2
fdc* at acpi?
fdc* at pnpbios? index ?
fd* at fdc? drive ?
DESCRIPTION
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
particular partitions:
- 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
<
sys/fdio.h
>:
FDIOCGETFORMAT
struct
fdformat_parms
-
Fetch current formatting parameters. This gets the default parameters
for the open device if no parameters 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 console
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
FDIOCFORMAT_TRACK
.
SEE ALSO
fdformat(1),
acpi(4),
isa(4),
pnpbios(4)
HISTORY
The
fdc
formatting support appeared in
NetBSD1.3.