13.2. Arithmetic Operations

Try these first

1. 1.

   What does the Program Counter (PC) do?

   Hint

   Think of it as a guide keeping track of where the CPU is in the sequence of instructions.

2. 2.

   Define the Instruction Register (IR).

   Hint

   Consider what the CPU needs to know for executing commands.

3. 3.

   What does the ALU do in a CPU?

   • Stores instructions
   • Performs arithmetic operations
   • Fectches data

   Hint

   Think of it as the calculator of the CPU.

4. 4.

   True or False: The Program Counter is only relevant for loading instructions.

   • True
   • False

   Hint

   Consider its role beyond just loading - what else does it track?

5. 5.

   Create an advanced operation where an instruction involves both fetching a value from memory and an arithmetic operation, detailing each step in the execution.

   Hint

   Outline each instruction step clearly.

6. 6.

   Compare and contrast the instruction execution processes for a LOAD instruction and a ADD instruction, highlighting differences.

   Hint

   Consider the memory interactions between each step as a clue.