15.3.2. Control Signals and Instruction Execution

Try these first

1. 1.

   What is the purpose of the Program Counter (PC)?

   Hint

   Think about how the CPU determines what to execute next.

2. 2.

   Define the term 'Control Signal'.

   Hint

   Consider how instructions are managed.

3. 3.

   What type of addressing uses another address to access an operand?

   • Direct Addressing
   • Indirect Addressing
   • Relative Addressing

   Hint

   Think about how operands are fetched.

4. 4.

   True or False: Register indirect addressing requires multiple memory accesses.

   • True
   • False

   Hint

   Consider how registers streamline addressing.

5. 5.

   Create a flowchart of the steps involved in executing an instruction using memory indirect addressing.

   Hint

   Break down each stage into its corresponding action.

6. 6.

   Calculate the total time taken for executing an instruction in both memory indirect and register indirect addressing, given that each memory access takes 2 cycles.

   Hint

   Use the information about cycles given for each type of addressing.