fdc(4) - NetBSD Manual Pages

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FD(4)               NetBSD/sparc64 Kernel Interfaces Manual              FD(4)


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 sys- tems, 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.
FORMATTING
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 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- sole 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 NetBSD 4.0.
BUGS
The ebus attachment does not yet work. NetBSD 9.0 May 8, 2007 NetBSD 9.0
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