1. Microprocessor Architecture BTEC National Diploma IT Practitioners

2. Address Bus Data Bus

3. Control Unit ALU Address Bus Data Bus

4. MAR MBR Control Unit ALU Address Bus Data Bus

5. SCRMAR MBRCIR Address Buffer Control Unit ALU Address Bus Data Bus

6. SCRMAR MBRCIR Address Buffer Control Unit ALU Address Bus Data Bus

7. SCRMAR MBRCIR INDEX X INDEX Y STACK POINTER Accumulator Address Buffer Control Unit ALU Address Bus Data Bus

8. SCRMAR MBRCIR INDEX X INDEX Y STACK POINTER Accumulator Address Buffer Control Unit ALU Switchable Logic Unit Address Bus Data Bus

9. SCRMAR MBRCIR INDEX X INDEX Y STACK POINTER Accumulator Address Buffer Control Unit ALU Switchable Logic Unit Address Bus Data Bus

10. SCRMAR MBRCIR INDEX X INDEX Y STACK POINTER Accumulator Address Buffer Control Unit ALU Switchable Logic Unit Address Bus Data Bus

11. SCRMAR MBRCIR INDEX X INDEX Y STACK POINTER Accumulator Address Buffer Control Unit ALU Address Bus Data Bus FLAGS Switchable Logic Unit