booting 4.1c from a uda50!

[Chris Kent]

There is indeed a problem; several people have sent me the fix, and it
now all works. The general scheme of things is that because of the file
system change, the boot program got much larger, and the movc3 loop
to clear out bss wasn't sufficient to do it all. There are other 
problems as well.

I have complete fixes; if you NEED them, drop me a note, and I'll send
you a copy. Otherwise, be content that you don't have the problem. It's
too much to send out to everyone (207 lines).

Thanks to all,
chris