1.1 Systems Architecture

Co-ordinates and controls all operations carried out by the computer.

• Control Unit
• Arithmetic Logic Unit

• Control Bus
• Program Counter

• Registers

Responsible for arithmetic operations and logical comparisons.

• ALU
• Control Unit

• Control Bus
• Registers

• Clock

A set of registers which act as a working area, often storing numbers and results of calculations.

• General Purpose Registers
• Data Bus
• Control Bus
• Address Bus
• System bus

Controls the timing of the processor.

• Clock
• ALU

• Control Unit

• Registers

• System bus

Which of these are NOT part of the CPU?

• Registers
• Graphics Card
• Buses
• Clock

What does ROM stand for?

What does RAM stand for?

The Fetch-Execute cycle fetches, decodes and executes instructions one at a time.

• True
• False

Which of these is NOT a register?

• MAR
• Program Counter
• MDR
• ALU

What does MAR stand for? (It is one of the registers)