termporary variables sit in one pool of memory (at the end of the globals)
thus drasticly reducing globals requirements. This works because the whole
lot is declared to be in the function's local variable space which is copied
to the locals stack in the progs engine.
to get the opcode from the table record rather than the location within the
table (ewww). gives a nice speed boost /and/ makes the opcode table easier to
maintain.
