System architecture

Question 1

Control Unit

Answer 1

Decodes and coordinates the execution of instructions

Question 2

Clock

Answer 2

Synchronises the activities of the other components on the processor

Question 3

Arithmetic Logic Unit

Answer 3

Performs relational comparisons, as well as other operations

Question 4

I/O controller

Answer 4

Provides an interface to devices beyond the processor

Question 5

General purpose

Answer 5

Describes any register without a pre-defined role

Question 6

Program Counter

Answer 6

Unless instructed otherwise, this component’s contents are incremented between instructions

Question 7

Memory Address Register

Answer 7

Points to where in memory data is about to be stored or retrieved from

Question 8

Memory Buffer Register

Answer 8

Any data arriving from memory will appear at this location first upon entering the processor

Question 9

Current Instruction Register

Answer 9

Stores the opcode of the instruction being executed

Question 10

Status Register

Answer 10

Stores, among other things, some indication as to whether overflow has occurred