FDC(4) NetBSD/x86 Kernel Interfaces Manual FDC(4)
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- ticular 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 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.
fdformat(1), acpi(4), isa(4), pnpbios(4)
The fdc formatting support appeared in NetBSD 1.3. NetBSD 8.0 September 23, 2011 NetBSD 8.0
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