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The IRET instruction gets back the execution state of the previous task, if

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The IRET instruction gets back the execution state of the previous task, if

(a) NT (nested task flag) = 1

(b) NT (nested task flag) = 0

(c) IF (interrupt flag) = 1

(d) IF (interrupt flag) = 0

This question was posed to me in homework.

I'm obligated to ask this question of Special Operations topic in chapter 80286-80287-A Microprocessor with Memory Management and Protection of Microprocessor

1 Answer

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by (49.2k points)
Right choice is (a) NT (nested task flag) = 1

The best explanation: If NT = 1, the IRET instruction gets back the execution state of the previous task. Otherwise, the IRET instruction lets the current task continue, after popping the required values from the stack.

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