1.1 CPU & VON NEUMANN ARCHITECTURE

What is the main purpose of the CPU?

• To Fetch, Decode and Execute Instructions (in MEMORY).

• To perform calculations.

• To render graphics on a screen.

• To manage the computer system.

What is the main feature of the von Neumann Computer architecture?

• There is a single PRIMARY MEMORY for both data and instructions.

• The model as a single CPU

• The instructions are stored in PRIMARY MEMORY

• Data is stored in SECONDARY STORAGE

What are the MAIN COMPONENTS of the CPU? (Tick all that are correct).

• ALU

• CU

• Registers

• Cache MEmory

• BIOS

Which of these are REGISTERS in the CPU? (Tick ALL that are correct)

• Accumulator

• ALU

• Program Counter

• Memory Address Register

• Control Bus Register

Tick all options that happen in the FETCH CYCLE?

• PC is incremented

• The Instruction at the MAR address is read from RAM

• The PC value is copied to the MAR

• The instruction in the IR is decoded

• The value in the MDR is written to the address in the MAR.

Tick all options that happen in the DECODE CYCLE?

• PC is incremented

• The Instruction at the MAR address is read from RAM

• The PC value is copied to the MAR

• The instruction in the IR is decoded by the CU

• The value in the MDR is written to the address in the MAR.

Tick all options that happen in the EXECUTE CYCLE?

• IR is incremented

• The data at the MAR address is read from RAM

• The ALU performs any calculations required on the ACC

• The instruction in the IR is decoded by the CU

• The value in the MDR is written to the address in the MAR.

Increasing which of these can improve system performance? (Tick all that apply)

• Cache Size

• Primary Memory (RAM)

• Address bus width

• Number of Cores

• System Clock Speed

Which of these best defines an embedded system?

• A computer system

• A general purpose computer system

• A dedicated computer system built into a device

• A portable computer system

• A computer system with no operating system

Which of these are embedded systems? (tick all that apply).

• Desktop

• iPad

• Sky Box

• Washing Machine

• SAT NAV