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2 cards from this section. Quick, good the night before a test.
What is the function of the 8259A interrupt controller?
Think about what happens when multiple devices signal the CPU at once.
What does the interrupt enable flag do?
Consider what happens when this flag is set to disable.
What does the interrupt enable flag do?
Think about what happens when you set a flag to 'enable'.
True or False: The 8259A can handle only one interrupt at a time.
Consider how many devices can signal the CPU simultaneously.
Describe a scenario where multiple devices generate interrupts at the same time. How would the 8259A prioritize these interrupts?
Consider the importance of the tasks each device is performing.
Outline the consequences of improperly handling the enable and disable interrupt flags in a critical system.
Reflect on systems where timing is critical, like air traffic control.
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