1.1 System Architcture

Question 1

Cycle that run in the CPU

Answer 1

The fetch-execute cycle

Question 2

Fetch

Answer 2

CPU fetch the instruction from the main memory(RAM) and bring it back to the CPU

Question 3

Decode

Answer 3

CPU done inspects instruction and breaks it down to work out what it needs to do

Question 4

Execute

Answer 4

The CPU will carry out the instruction Ex, perform a calculation

Question 5

Common CPU components

Answer 5

ALU (arithmetic logic unit)
CU (control unit)
Cache
Registers

Question 6

ALU

Answer 6

Carry out Arithmetic calculations
Making logical decisions

Question 7

CU

Answer 7

Send signals to control how data moves around the CPU

Question 8

Registers

Answer 8

Tiny, superfast piece of board memory inside the CPU
Each has very specific purpose

Question 9

Cache

Answer 9

Provides fast access to frequently use instruction and data

Question 10

Key characteristics of the Avon Neumann architecture

Answer 10

Central processing unit (CPU)
Single control unit (CU)
Arithmetic log unit (ALU)
Onboard cache
Internal clock

Question 11

Program counter (PC)

Answer 11

Holds the address of the next instruction to be executed in memory

Question 12

Memory address resister (MAR)

Answer 12

Holds the address of where data is to be fetched or stored

Question 13

Memory data register (MDR)

Answer 13

Holds the data fetched from, or to be written to memory

Question 14

Accumulator

Answer 14

Holds the results of calculation