Thu Apr 7 00:24:04 EDT 2011

A clean usb.f

So I copied the initial (layer 0?) stuff from _usb.f

I'm using the following syntax for intializing the the buffer
descriptors: The first word sets the a register, and the rest just
stores incremental bytes.

      #x08     !+  \ clear UOWN, MCU can write
      64       !+  \ buffer size
      buf-IN0  !+  \ addrl
      buf-page !+  \ addrh

What I miss is "emit".  It doesn't work properly.  I can't do much
without basic debug output.  So fixing that is the next task.