A priority interrupt may be accomplished by
Answers
Answer:
The concept of defining the priority among devices so as to know which one is to be serviced first in case of simultaneous requests is called priority interrupt system. This could be done with either software or hardware methods
Answer:
A priority interrupt may be accomplished by polling and daisy chaining
Explanation:
When the CPU receives this signal, it pauses the execution of the current set of instructions before proceeding to handle the transfer request. But what if several devices produce interruptions at once. In that situation, we have a method for selecting which interrupt should be handled first. To put it another way, we must assign a priority to each device for systemic interrupt servicing. A priority interrupt system refers to the idea of ranking devices in order to determine which one should be attended to first in the event of concurrent demands. Either hardware or software techniques could be used to accomplish this.
POLLING SOFTWARE METHOD
By branching to the same service application, all interrupts are handled using this technique. Then, this programme compares each if it is the device that is causing the interrupt. The priority that needs to be established determines the checking sequence. Devices are checked in descending order of priority starting with the highest priority device. If the device is confirmed to be the source of the interrupt, a different service programme designed specifically for that device is called.
DAISY CHAINING HARDWARE METHOD
The daisy-chaining technique includes serially coupling every device capable of requesting an interrupt. The devices' priority determines how this setup is set up. First is the device with the highest priority, then comes the device with the second-highest priority, and so on.
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