A priority interrupt may be accomplished by

A priority interrupt is a system which decides the priority at which various types of interrupts are processed. It can be accomplished by:

1. Setting up the priority: The priority of the interrupts is usually set up in the interrupt controller, which could be a part of the system's hardware or firmware. The priority level can be set according to the urgency of the tasks. For example, a data loss can be considered as a high priority interrupt.

2. Receiving the interrupt: When an interrupt is generated, the interrupt controller receives it. The controller then checks the priority of the incoming interrupt.

3. Comparing the priorities: The interrupt controller compares the priority of the new interrupt with the interrupt that is currently being serviced. If the new interrupt has a higher priority, it will be serviced first.

4. Servicing the interrupt: The processor saves its current state and starts executing the interrupt service routine for the high priority interrupt. Once this is done, it will return to the state it saved before the interrupt.

5. Returning to the lower priority interrupt: After the high priority interrupt has been serviced, the system will return to the lower priority interrupt that was interrupted.

This way, a priority interrupt system ensures that high priority tasks are executed before lower priority tasks, even if the lower priority tasks were initiated first.