NAME
fdc
- Sun SPARCstation i82072 or i82077 floppy disk controller driver
SYNOPSIS
fdc0 at sbus0 (SBus based machines)
fdc0 at ebus0 (PCI based machines)
fd* at fdc0
DESCRIPTION
This is the driver for the built-in floppy disk drive run by the
Intel
i82072 or i82077 controller chip found on the SPARCstation desktop
systems, and other
SPARC
systems.
Bits
[0-3]
of the minor device number of the special files referring to this
device encode the floppy density as follows:
- 0
-
3.5'' 1.44MB floppy diskettes.
- 1
-
3.5'' 720KB floppy diskettes.
- 2
-
3.5'' 360KB floppy diskettes.
- 3
-
3.5'' 1.2MB/NEC Japanese format floppy diskettes.
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
eject(1),
fdformat(1)
HISTORY
The
fdc
driver first appeared in
NetBSD4.0.
BUGS
The ebus attachment does not yet work.