IGCSE Computer Architecture

• microprocessor

• random access memory

• read only memory

• hard disk

It performs the mathematical and logical operations of the processor.

• ALU

• MU

• CU

• CIR

It is the bus that carries the data from the processor to the memory or any appropriate devices.

• address bus

• data bus

• control bus

• program counter

The register that holds data temporarily from the ALU during the calculations.

• MAR

• MDR

• PC

• ACC

It is used to set the timing of every signal/instructions from the control bus to make sure synchronization takes place.

• clock speed

• system clock

• date and time

• region and language

It carries signals from the CU to all the other computer components.

• address bus

• control bus

• data bus

• current instruction register

Name the bus A.

• control bus

• address bus

• data bus

• program counter

Name the component A.

• ALU

• IAS

• CU

• MU

Name the register A.

• MAR

• MDR

• ACC

• PC

Name the register A.

• PC

• MDR

• MAR

• CIR