Assessment Covering… Von Neuman architecture Registers – purpose and use, the fetch execute cycle

Question 1 Answer… Question (4 marks) … Label the 4 components of the Von Neumann Architecture Processor Memory Input/Output System Bus

Question 2 Answer… ROM is Read Only Memory and is memory that cannot be written over when the computer/ system shuts down the data stays in ROM. RAM stands for Random Access Memory this is memory which is lost when the system is shut down and is used to store data needed for running programs Question (4 marks) … What is the difference between ROM and RAM and what do they stand for?

Question 3 Answer… Question (6 marks) … Complete the following table: NameDirectionDescription Address Bus Uni-Directional Sends the address of the data and where it has to go Data Bus Uni- Directional Bi directional Sends instructions a data to the processor to be processed. Control Bus Bi- Directional Control bus is used so that all data and instructions are sent to the right locations Sends control signals

Question 4 Answer… 4 Wires: 4 6 Wires: 6 10 Wires: 10 Question (3 marks) … What is the largest number the following width data buses can carry at one time: Width 4 wires Width 6 wires Width 10 wires

Question 5 Answer… 3 input : Mouse/ KeyBoard / Microphone 3 Output : Speakers / Monitor / Projector 2 Of both: TouchScreen / Gaming Headset Question (8 marks) … Name 3 input peripherals and 3 output peripherals and 2 that could be both…

Question 6 Answer… USB Stick, Floppy Disc, External Hard drive Question (3 marks) … Name 3 secondary storage devices…

Question 7 Answer… Question (2 marks) … Name two I/O controllers

Question 8 Answer… Stored program concept is a concept revolved around stored programs. Question (2 marks) … Define the stored program concept:

Question 9 Answer… Arithmetic Logic Unit and this is what executes all of the instructions within the processor. Question (2 marks) … What does the ALU stand for and give a description of its function.

Question 10 Answer… 3.4 MegaHertz this means that 3.4 million instructions can be executed every second Question (2 marks) … What does 3.4MHz mean?

Question 11 Answer… Registers are a type of memory that is found within the CPU that allows data to be stored within so that the ALU can reach in and receive the correct data quickly and easily. Question (2 marks) … What are registers:?

Question 12 Answer… Program Counter (PC) – ACC- CIR - MDR- Question (8 marks) … Name 4 registers used by the processor and explain what each does:

Question 14 Answer… Overclocking may cause some drawbacks such as over heating of the CPU as it is working harder than it normally should causing more cooling required to maintain the level of processes a second. This could eventually burn out the CPU rendering it unusable. Question (2 marks) … What draw back might increasing clock speed bring?

Question 15 Answer… The instruction set is the instructions that an individual CPU is able to understand and comprehend. Question (2 marks) … What is the instruction set:

Question 16 Answer… Opcode with 4 bits could store up to 16 different Instructions. Operand with 6 Bits could store a number as large as 63 Question (2 marks) … For a word with 4 bits for an opcode and 6 bits for an operand How many different instructions could I fit into the instruction set? What is the largest number that I could use as data?

Question 17 Answer… LOAD #34 ADD #35 STORE 100 Question (3 marks) … Using the LOAD / ADD / STORE instructions Write some assembly code to… put in memory location 100

Question 18 Answer… Question (1 marks) … What effect will having a RISC or CISC have on the contents of the CIR?

SCOR E 38 / 56