| FDC(4) | Device Drivers Manual (x86) | FDC(4) | 
fdc —
fdc0 at isa? port 0x3f0 irq 6 drq 2
fdc* at acpi?
fdc* at pnpbios? index ?
fd* at fdc? drive ?
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 particular partitions:
<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.
fdc formatting support appeared in
  NetBSD 1.3.
| September 23, 2011 | NetBSD 10.0 |