2.3.3. Influence of Signed and Unsigned Arithmetic on Flags

Try these first

1. 1.

   What happens when you add +7 and -7?

   Hint

   Think about the outcome of addition leading to zero.

2. 2.

   What does the sign flag indicate?

   Hint

   Refer to how we visualize signed numbers in binary.

3. 3.

   What does the Zero Flag indicate?

   • Indicates a negative result
   • The result is zero
   • An overflow occurred

   Hint

   Think about conditions resulting from straightforward arithmetic.

4. 4.

   True or False: The Carry Flag is important in signed arithmetic.

   • True
   • False

   Hint

   Consider the nature of signed numbers and how they behave.

5. 5.

   Add two signed numbers: +7 and -8. What flags are set?

   Hint

   Evaluate both the result and sign flags.

6. 6.

   Perform an unsigned addition of 15 and 2. Determine the flags that are activated.

   Hint

   Consider the maximum value for 4 bits.