Question

Interrupts
Part I
Create a set of three priority interrupts and show how they are executed between times 0 and 80 ns.
Assume:
• Only one program or interrupt can run at a time
o Each interrupt takes 20 ns to complete
o The priority of the interrupts ranges from IRQ6 as the highest priority interrupt to IRQ0 as the lowest priority
Each level of priority interrupt need not be included. Show your results as in the following format using as many times as needed:

            Time                      Action
             0 ns:                      Start of Main Program

Part II
Explain the relationship among disk platters, tracks, sectors, and clusters.

Solution Preview

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1) We assume that IRQ6 > IRQ5 > IRQ4 (priorities).
We also assume the following succession of events:
0-10 ns Main program
10 ns IRQ5
25 ns IRQ6
40 ns IRQ4...

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