H   Start of begin block.

;   end of procedure or begin block.  All local descriptors
    are destroyed.

R   Return from routine.  (see Conditional statements for
    exits from predicates).

         e.g. $10R,7,1,0         routine R(integer X, Y)
              {11X,21,1,0$12Y,21,1,0}
              R                  return
              ;                  end

V   Assign the result of the current function and return.

M   Assign the result of the current map and return.

    The left-hand side of the assignment is implied by
    type and form of the enclosing procedure; the right-hand
    side is popped from the stack.

    Note the form in which procedure type parameters are
    specified:

    routine R(routine S(integer X), integer Y)

    $10R,7,1,0{$11S,7,1,0$12Y,21,1,0}
    $11S,7,1,10{$13X,21,1,0}

    If a procedure type parameter itself has parameters
    which are procedures the parameters for those procedures
    are not specified.  E.g.

      routine A(routine B(routine C(integer D)))

      $50A,7,1,0,{$51B,7,1,0}
      $51B,7,1,10,{$52C,7,1,0}




















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