| FD(4) | Device Drivers Manual (sparc) | FD(4) | 
fd, fdc —
fdc0 at mainbus0 (sun4c)
fdc0 at obio0 (sun4m)
fd* at fdc0
Bits [0-3] of the minor device number of the special files referring to this device encode the floppy density as follows:
<sys/fdio.h>:
FDIOCGETFORMAT
    struct fdformat_parmsFDIOCSETFORMAT
    struct fdformat_parmsFDIOCFORMAT_TRACK
    struct fdformat_cmdEINVAL, 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
    intFDOPT_NORETRYFDOPT_SILENTFDIOCGETOPTS
    intA 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.
fd formatting support appeared in
  NetBSD 1.3.
| February 17, 2017 | NetBSD 10.0 |