Notification
interface serves a very specific role in simulation; for device implementations to be notified when an interrupt that a device may have posted is executed, or when the user forces an interrupt to be notified. Some interrupts are "auto-clear" which means that they automatically unpost themselves when their handler is invoked. To support this functionality, a Notification
is inserted on them that allows the flag register to be updated when the handler is invoked. As a user of the simulation, you SHOULD NOT implement a notification.
@see avrora.sim.Simulator.InterruptProbe for probing interrupts
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