Don,
  I thought about using the standard ROM driver to access the
floppy. When you have a driver you care less about SWIM chips or any
other piece of junk that might be inside the box. Most probably you
will need to add few traps and few locore adresses to make the driver
work. I am not sure about the time delays during data transfer. Maybe
some combination of asynchronous and synchronous calls would save the
system from hangups. 

I did not try those ideas and I do not see any free time for me at
least till August.

	Taras Ivanenko