Practice Program Status Word (psw) (1.3) - Flags and Conditional Instructions

Practice: Program Status Word (PSW)

Lesson 1.3Flags and Conditional Instructions

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9 questions

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6 sample questions

Question 1.
What does the Program Status Word (PSW) contain?
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Think about the components that are necessary for the CPU's state.
Question 2.
Define a conditional instruction.
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Recall the if-then-else logic.
3Question 3.
What is the role of the Program Status Word (PSW) in CPU operations?
- It only stores the last executed instruction.
- It maintains the CPU's state and aids in decision-making.
- It serves as a backup for old program states.
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Think about why we need state information during program execution.
4Question 4.
True or False: The zero flag is set when the result of an operation is non-zero.
- True
- False
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Recall what the zero flag indicates.
Question 5.
You have a program that calculates the sum of two numbers. Detail how you would use flags to determine if you should output the result or skip to a different instruction.
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Think about how the zero flag impacts decision-making in this context.
Question 6.
Design a sequence of assembly instructions that demonstrates the use of the PSW during a function call and return.
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Make sure to include steps that save and restore the state.

5 more questions in this section. Enroll free to practise them all.