It takes more than ROMs. The SE originally shipped
with the original
IWM floppy controller, which cannot handle MFM disk format (either 720K
or 1440K floppies). To use the Apple Superdrive (FDHD) 1440K drive,
you need BOTH the newer ROMs and the newer SWIM floppy controller.
Then does that mean there weren't any 3rd party 1.4 drives that could be
used on the 800k SE? I thought there were. Although maybe they were and
used SCSI, or their drivers just had a way to get around the floppy
controller short comings.
-chris
<http://www.mythtech.net>