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), amiga/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 9.0 February 17, 2017 NetBSD 9.0
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