fdc(4) - NetBSD Manual Pages

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FDC(4)               NetBSD/amiga Kernel Interfaces Manual              FDC(4)


NAME

     fdc -- Amiga custom chip floppy disk controller device


SYNOPSIS

     fdc0 at mainbus0
     fd* at fdc? unit ?


DESCRIPTION

     The fdc device driver provides support for the mainboard floppy disk con-
     troller and floppy disk drives on Amiga systems.

     The driver supports the following floppy diskette formats by using par-
     ticular partitions:
           880KB  3.5-inch  11 sectors/track (``Amiga'') (a)
           1.76MB 3.5-inch  22 sectors/track (``Amiga'') (a)
           880KB  5.25-inch 11 sectors/track (``Amiga'') (a)
           720KB  3.5-inch  9 sectors/track (``MS-DOS'') (b)
           1.44MB 3.5-inch  18 sectors/track (``MS-DOS'') (b)
           720KB  5.25-inch 9 sectors/track (``MS-DOS'') (b)
     On systems equipped with floppy disk drives capable of using high-density
     floppy diskettes, the driver automatically detects whether the inserted
     floppy diskette is either a double-density or a high-density medium.


DIAGNOSTICS

     fdc: unable to allocate DMA buffer  The driver found the controller, but
     was unable to allocate the amount of chip memory required for its DMA
     buffers.


SEE ALSO

     fdformat(1), autoconf(4)


BUGS

     In order to detect a floppy disk drive's capability of using high-density
     media, a high-density diskette has to be inserted for the duration of the
     autoconfiguration phase of the drive.

     The fdc driver supports neither the fdformat(1) facility nor the
     <sys/fdio.h> interface.

NetBSD 5.1                     February 28, 1998                    NetBSD 5.1