Topic 2

The component of a computer system which contains the circuitry necessary to fetch, decode and execute program instructions.

• MDR

• RAM

• CPU

• Motherboard

Provides ALU with data and processing instructions...

• CU

• ALU

• MAR

• SR

Also known as the "core"

• CPU

• CU

• MDR

• ALU

Small, very fast circuits that store intermediate values from calculations or instructions

(a)  

Holds the intermediate results of the currently running instructions

• Accumulator

• Program Counter

• IR

• MAR

Connecting wires that connect the CPU to other devices

• Transitioning

• Buses

• Random Access Memory

• MAR

Contains a memory address

• MAR

• MDR

Only storage directly accessible by the CPU

• Primary Memory

• Secondary Memory

Is volatile

• ROM

• RAM

Contains the data and instructions the computer has loaded since starting up

• ROM

• RAM