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4 cards from this section. Quick, good the night before a test.
What is the purpose of the Program Counter?
Think about what helps the CPU know what to do next.
Define what an Interrupt Service Routine (ISR) is.
Consider what happens when something needs the CPU's immediate attention.
What does the Program Counter store?
Locate it within the flow of instruction execution.
True or False: The Processor Status Word must be saved to retrieve flag information after returning from an ISR.
Reflect on the importance of maintaining operational context.
Design a flowchart that outlines the steps taken during interrupt handling and context restoration.
Begin with the event of an interrupt and follow through to the end of the ISR.
Discuss the impact of not saving the processor context before servicing interrupts and provide examples of possible system failures.
Consider scenarios where programs rely on accurate state information to function correctly.
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