Computer Science

Computer Architecture

(a) Describe the purpose of two registers that are used by Von Neumann architecture.

Memory Address Register- The Memory address register stores the address of where the instruction is to be sent, or where it is from.

Arithmetic Logic Unit- The arithmetic logic unit is used for mathematical equations (/, +, *,-)

(b) Identify four events that take place during the fetch-execute cycle.

Fetch the instruction

Decode the instruction

Program counter will go up by one

Execute.

(c) Gareth’s sat-nav contains an embedded system. Define what is meant by an embedded            system.

An embedded system is a controller with a dedicated function within a larger mechanical or electrical system (In this case, the satnav)

               

                (d) Identify three devices, other than a satnav that have an embedded system.

                                Dishwasher

                                Microwave

                                Washing Machine

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