1.1.1 CpuArchitecture

Question 1

CPU components

Answer 1

ALU - arithmetic logic unit
CU - control unit

Question 2

CPU registers

Answer 2

PC - program counter
Acc - accumulator
MAR - memory address register
MDR - memory data register

Question 3

main components

Answer 3

CPU - central processing unit
RAM - random access memory
FDE - fetch decode execute cycle

Question 4

CPUs do … (2 things)

Answer 4

• process data & instructions
• control rest of computer system

Question 5

flow of data between RAM and CPU

Answer 5

1. when writing programs, code is stored in RAM
2. when you run it the CU fetches one of the lines of code from the RAM and decodes it into commands
3. ALU executes the commands in your code
4. output is stored in main memory/RAM

Question 6

ALU

Answer 6

carries out arithmetic + logic operations

Question 7

CU

Answer 7

regulates and integrates operations

Question 8

Cache

Answer 8

a type of high speed RAM in the CPU

Question 9

PC

Answer 9

used to keep track of addresses of current/next instructions

Question 10

Acc

Answer 10

short term immediate storage of arithmetic + logic data in CPU

Question 11

MAR

Answer 11

holds addresses of current instruction

Question 12

MDR

Answer 12

holds content found at address held in MAR