1.4.3. Carry Flag

Try these first

1. 1.

   What does the Zero Flag indicate after an arithmetic operation?

   Hint

   Think about what you would check to determine whether two numbers are equal.

2. 2.

   What is a conditional instruction?

   Hint

   Consider statements you use in programming like 'if' statements.

3. 3.

   What is a conditional instruction?

   • An immediate instruction
   • An instruction executed based on condition
   • An instruction that never executes

   Hint

   Think about programming 'if' conditions.

4. 4.

   True or False: The Carry Flag is set when subtraction requires a borrow.

   • True
   • False

   Hint

   Imagine borrowing in everyday math.

5. 5.

   You have an 8-bit signed register that holds the value 127. You add 1 to it. What happens to the Overflow Flag, and why?

   Hint

   Draw the binary representation to visualize the overflow.

6. 6.

   Write a pseudo code that checks for a condition based on the Zero Flag after subtracting two numbers. Explain how you would decide the next steps.

   Hint

   Plan out steps logically as if you were writing a flowchart.