1 - Components Of A Computer

Question 1

What is the CPU?

Answer 1

The Central Processing Unit.

Question 2

Components of the CPU?

Answer 2

1. Control Unit
2. Buses
3. Arithmetic - logic Unit
4. Dedicated Registers

Question 3

What does the control unit do?

Answer 3

Coordinates the activity of the CPU
(data is sent along the control bus)

Question 4

What is a bus?

Answer 4

A series of connectors that transfer signals along components (often 8, 16, 32, and 64; this is what a 64 bit computer is)

Question 5

System bus components?

Answer 5

1. Control Bus
2. Data Bus
3. Address Bus

Question 6

What are the signals often passed along the control bus?

Answer 6

1. Memory Read
2. Memory Write
3. Bus request
4. Bus grant
5. Clock

Question 7

What is the ALU?

Answer 7

Arithmetic:
- Add, subtract, multiply, divide
Logic:
- AND, OR, NOT, XOR
Shift:
- Move bits from left or right within a register

Question 8

Accumulator

Answer 8

The register where results of the ALU go rather than slower memory

Question 9

Program Counter

Answer 9

Holds the memory address of the next instruction to be executed

Question 10

Current Instruction Register (CIR)

Answer 10

Holds the current instruction, which is split into opcode and operand

Question 11

Memory Address Register (MAR)

Answer 11

Holds the address of where the processor needs to visit next

Question 12

Memory Data Register

Answer 12

Temporarily holds the data moving between the processor and main memory

Question 13

FDE Cycle

Answer 13

The process where the processor FETCHES the next instruction, DECODES what it is, and EXECUTES the instruction.