top level / lisp break



I'm still hacking on the Allegro CL version of 5.9.3.
Where does the top-level break (debugging in lisp) get set up??

Why--
I would prefer to see the default Allegro top level rather than the
Maxima> prompt.

It is kind of funny to see that what happens to variable cases in Maxima.
That is,  M   is changed to |$m|  whereas  m is changed to $M.

Running 5.9.3 on Allegro with "both cases" doesn't work. I don't know if it
is a simple patch, but leaving
M  as $M
M  as $m
integrate  as $integrate

etc
would be nicer for the person debugging in Lisp.

Thanks

RJF