- Removed USB device type handling from constructor and init code, since we
only the 'floppy' type here.
- Write commands now using the device buffer for one sector.
TODO: support for starting without media and runtime media change.
- The read buffer is now limited to 16 sectors and the read commands can fill
it multiple times until all sectors have been read.
- The write commands are currently not using the device buffer, so no panic
should happen here.
by Ben Lunt. To connect a USB floppy you can use the 'floppy' device with the
path to the image separated with a colon. VVFAT is also supported.
FIXME: The device detection fails on some recent Linux distributions.
FIXME: Only 1.44M media format is currently supported.
TODO: Media change without disconnect is not implemented yet.
