Quiz CS AS Level - Chapter 4 Processor Fundamental

Select all the correct main features of the Von Neumann architecture

• a Central Processing Unit

• Processor consist of registers

• Computer memories that could store programs as well as data

• Stored program made up of instructions that could be executed in sequential order

• a Processor able to access the memory directly

Register Name:

Stores the address of the memory location currently being read from or written to

Register Name:

Contain bits which can be set or cleared depending on the operation (for example, to indicate overflow in a calculation)

Match this following BUS function:

• Address BUS

• Carries data between CPU and memory

• Data BUS

• Carries addresses throughout the computer system

• Control BUS

• Carries signals from the CU to all the other computer components

Register Name:

Stores the current instruction being decoded and executed

Register Name:

Stores data which has just been read from memory or data which is about to be written to memory

Part of CPU that responsible to manage data flow and ensure all operation is run smothly

• ALU

• KAMU

• CU

• ILOVEYOU

Register Name:

Stores the address where the next instruction to be read can be found

​ Show how the fetch-decode-execute cycle is carried out in the Von Neumann computer model.

• the program counter (PC) contains the address of the memory location of the next instruction which has to be fetched

• the contents (instruction) at the memory location (address) contained in MAR are copied temporarily into the memory data register (MDR)

• the contents (instruction) of the MDR are copied and placed into the current instruction register (CIR) then the value in the PC is then incremented by one

• the instruction is finally decoded and then executed by sending out signals (via the control bus) to the various components of the computer system

• address is copied from the PC to the memory address register (MAR) using the address bus

Clock whitin the Control Unit is use to syncronise process in CPU.

There is two kind of Clock :

Groups:

(a) Internal Clock

,

(b) System Clock

• Global timing signal synchronizing entire computer system

• Electronic signal controlling a microprocessor operation