structure of cpu and functions

WHAT IS THE FUNCTION OF THE MDR

• HOLDS DATA OR INSTRUCTIONS MOVING BETWEEN THE PROCESSOR AND MAIN MEMEORY

• HOLDS INSTRUCTIONS TO GO TO CACHE

• HOLDS THE ADDRESS OF THE NEXT INSTRUCTIONS TO BE FETCHED

• HOLDS THE CURRENT INSTRUCTIONS THAT IS BEING DECODED AND EXECUTED

WHAT IS THE FUNCTION OF THE CIR

• HOLDS THE ADDRESS OF THE NEXT INSTRUCTION TO BE FETCHED

• HOLDS DATA OR INSTRUCTIONS MOVING BETWEEN THE PROCESSOR AND THE MAIN MEMORY

• HOLDS THE CURRENT INSTRUCTIONS THAT IS BEING DECODED AND EXECUTED

• STORES RESULTS OF CALCULATIONS PERFORMED BY THE ALU

CONTROL UNIT

• CIR

• MDR

• CONTROLS FLOW OF DATA AROUND THE CPU

• HELPS THE COMPUTER RUN

WHAT FACTORS AFFECT CPU PERFORMANCE

• CLOCK SPEED

• CACHE SIZE

• NUMBER OF CORES

• ADDRESS AND DATA BUS WIDTH

WHY DOES MORE CORES SPEED UP THE COMPUTER

• MORE INSTRUCTIONS CAN BE PROCESSED SIMULTANEOUSLY

• THE DECODE FETCH EXECUTE CYCLE IS CARRIED OUT FASTER

• CACHE IS BIGGER

WHAT IS CACHE

• A SMALL AMOUNT OF MEMORY THAT CAN BE ACCESSED SUPER QUICKLY

• 1

• A LARGE AMOUNT OF MEMORY THAT CAN BE ACCESSED VERY VERY SLOWLY

• CLOCK SPEED

WHAT IS THE FUNCTION OF THE MDR

• HOLDS DATA OR INSTRUCTIONS MOVING BETWEEN THE PROCESSOR AND MAIN MEMEORY

• HOLDS INSTRUCTIONS TO GO TO CACHE

• HOLDS THE ADDRESS OF THE NEXT INSTRUCTIONS TO BE FETCHED

• HOLDS THE CURRENT INSTRUCTIONS THAT IS BEING DECODED AND EXECUTED

WHAT IS CACHE

• A SMALL AMOUNT OF MEMORY THAT CAN BE ACCESSED SUPER QUICKLY

• 1

• A LARGE AMOUNT OF MEMORY THAT CAN BE ACCESSED VERY VERY SLOWLY

• CLOCK SPEED

WHY DOES MORE CORES SPEED UP THE COMPUTER

• MORE INSTRUCTIONS CAN BE PROCESSED SIMULTANEOUSLY

• THE DECODE FETCH EXECUTE CYCLE IS CARRIED OUT FASTER

• CACHE IS BIGGER

WHAT IS THE FUNCTION OF THE CIR

• HOLDS THE ADDRESS OF THE NEXT INSTRUCTION TO BE FETCHED

• HOLDS DATA OR INSTRUCTIONS MOVING BETWEEN THE PROCESSOR AND THE MAIN MEMORY

• HOLDS THE CURRENT INSTRUCTIONS THAT IS BEING DECODED AND EXECUTED

• STORES RESULTS OF CALCULATIONS PERFORMED BY THE ALU