2.1.6. Supervisor Mode and Privileges

Try these first

1. 1.

   What is the significance of supervisor mode?

   Hint

   Think about the access level needed for certain system functions.

2. 2.

   What does the zero flag indicate?

   Hint

   Link it to basic arithmetic results.

3. 3.

   What is the role of the carry flag in arithmetic operations?

   • Indicates zero result
   • Indicates overflow
   • Indicates negative result

   Hint

   Think about what happens when arithmetic results exceed maximum storage.

4. 4.

   True or False: The overflow flag is used only in unsigned arithmetic.

   • True
   • False

   Hint

   Remember the use of two's complement representation.

5. 5.

   Design an algorithm that checks the equality flag and utilizes it in a typical program flow structure. Describe what happens when the flag is set versus when it is not.

   Hint

   Think about scenarios like loops and conditionals in programming.

6. 6.

   Consider the implications of using the carry flag in an arithmetic operation. What would happen if you fail to check the carry flag when adding two maximum values?

   Hint

   Reflect on how overflow can disrupt a program's logic flow.