2.2. Control Instructions Based on Flags

Try these first

1. 1.

   What does the Zero Flag indicate?

   Hint

   Think about conditions that would lead to a zero result.

2. 2.

   What happens when an Overflow Flag is set?

   Hint

   Consider the limits of your data types.

3. 3.

   What does the Zero Flag indicate?

   • It indicates overflow occurred
   • It indicates the result is zero
   • It indicates a carry-out occurred

   Hint

   Think about the operation results.

4. 4.

   True or False: The Carry Flag is set during signed arithmetic only.

   • True
   • False

   Hint

   Consider how carry is treated in both types.

5. 5.

   Write a small pseudocode to sum numbers from 1 to 10 using flags, and explain when you would check the Zero Flag.

   Hint

   Consider how you will keep track of your running total.

6. 6.

   Suppose you have a signed addition of -5 and +5. Analyze the flags set in this operation and explain why, focusing on the outcome.

   Hint

   Draw the binary values to visualize the operation.