3.2.2. Register and Overflow Flag Details

Try these first

1. 1.

   What is the purpose of the overflow flag?

   Hint

   Think about when computations exceed the range.

2. 2.

   What happens when you add 1 and 2 in unsigned arithmetic?

   Hint

   Check if the result exceeds the maximum for the bit width.

3. 3.

   What indicates an overflow has occurred during signed arithmetic?

   • Carry Flag
   • Zero Flag
   • Overflow Flag

   Hint

   Think about which flag deals with signed results.

4. 4.

   True or False: The carry flag is important in signed arithmetic.

   • True
   • False

   Hint

   Reflect on the context of signed arithmetic.

5. 5.

   Add -4 and -5 in a 4-bit signed arithmetic setup. Explain what happens and why.

   Hint

   Consider how negative numbers are represented in binary.

6. 6.

   What would occur from adding 14 and 3 in a 4-bit unsigned operation? Discuss the result.

   Hint

   Analyze the limits of the chosen bit width.