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CPU Interrupt Handling Process in Hardware

Learn how CPU accepts interrupt requests, saves PC and Flag register, changes mode bit, and performs ISR tasks. Explore how to inhibit INT, handle different INT types, and manage interrupt services efficiently. Understand the scheduler and context switching mechanisms.

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CPU Interrupt Handling Process in Hardware

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  1. CPU Interrupt Hardware

  2. CPU accepts interrupt request: • 1. Save PC and Flag register • 2. Change mode bit • 3. Push ISR’s starting address to PC

  3. ISR { • 1. Inhibit INT; • 2. Pop CPU registers and save them in PCB; • 3. Check which type of INT • 4. Check which event occurs/what device requests INT • 5. Perform corresponding interrupt service • 6. Set clock timer • 7. Clear corresponding INT bits and event register and in INT register • 8. Scheduler () • {Select a process from Ready Queue; • Context switch;}

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