* things on their own levels to avoid having to do double-dispatches. Second,
* the levels match as closely as possible the alternate IRQ mapping mode (aka
* "A/UX mode") available on some VIA machines.
* things on their own levels to avoid having to do double-dispatches. Second,
* the levels match as closely as possible the alternate IRQ mapping mode (aka
* "A/UX mode") available on some VIA machines.