unit 3 Hardware

Question 1

what is the CPU?

Answer 1

-central processing unit
-a component in a computer system that processes data so that the result can be ouput.

Question 2

what is a microprocessor?

Answer 2

A type of integrated circuit on a single chip

Question 3

ALU

Answer 3

• arithmetic logic unit
• component in the CPU
• performs all mathematical and logical operations required when processing data and instructions.

Question 4

CU

Answer 4

• control unit
• component in CPU that controls all the operations in the CPU.

Question 5

PC

Answer 5

• program counter
• component in CPU
• stores the address of the next instruction to be processed.

Question 6

MAR

Answer 6

-memory address register
- component in CPU
- holds address of the data or instruction to be located in RAM.

Question 7

MDR

Answer 7

• memory data register
• component in CPU
• holds data or instructions that are fetched from RAM.

Question 8

CIR

Answer 8

current instruction register
- register built into CU
- holds the current instruction that is being processed in the CPU>

Question 9

ACC

Answer 9

accumulator
- register built into ALU
- stores result of any interim calculations.

Question 10

buses

Answer 10

Data Bus- Wires used for transmission of data and instructions between components in a computer.
Address Bus- wires used for the transmission of addresses between components in a computer.
Control Bus- wires used for the transmission of control signals between components in a computer.