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 7.1.2 February 28, 1998 NetBSD 7.1.2
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