1.4.1. Types of Flags in CPU

Try these first

1. 1.

   What does the Zero Flag indicate in the CPU?

   Hint

   Think about what zero represents in math.

2. 2.

   What is the purpose of the Sign Flag?

   Hint

   Consider the number line.

3. 3.

   What does the Zero Flag indicate in a CPU?

   • It indicates a valid operation
   • It indicates zero result
   • It indicates an overflow

   Hint

   It's about the result being exactly zero.

4. 4.

   True or False: The Sign Flag is only relevant for unsigned arithmetic.

   • True
   • False

   Hint

   Consider what signed and unsigned mean in terms of values.

5. 5.

   You are designing an instruction set that needs to handle signed operations. Explain how you would utilize the Overflow Flag to manage errors effectively.

   Hint

   Think about how overflow occurs and what numbers might cause them.

6. 6.

   Create a flowchart that describes how an arithmetic operation's result affects the various flags in the register.

   Hint

   Outline each step for different operations clearly.