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FD(4) Device Drivers Manual (sun3) FD(4)

fd — Sun 3/80 i82027 floppy disk drive controller driver

fdc0 at obio0 (sun3x)
fd* at fdc0

The fd driver is for the built-in floppy diskette drive run by the Intel i82027 controller found on the Sun 3/80.

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>:

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.

struct fdformat_parms
Set formatting parameters. The driver saves this state and it persists while the device is open.

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.

int
Set driver options which persist until the device is closed. The options should be the logical OR of the desired values below:

Do not retry operations on failure
Do not print error messages to the console

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.

eject(1), fdformat(1)

The fd formatting support appeared in NetBSD 1.3.

Formatting appears to not work reliably on all machines.

June 23, 1996 NetBSD-9.2