AssessmentCovering…

• Von Neuman architecture• Registers – purpose and use, the fetch execute cycle

Question 1 Question (4 marks) …Label the 4 components of the Von Neumann Architecture

I/O Processor Main Memory

System Bus

4 marks

Question 2

Answer…

ROM stands for Read Only Memory and this means the data stored in the ROM can only be read and therefore not edited. ROM stores all of the boot up code like the operating system and is not cleared when the PC shuts down.

RAM stands for Random Access Memo, this type of memory can be edited and it stores data relevant to all of the current programs that are running, however RAM is cleared when the PC shuts down.

Question (4 marks) …What is the difference between ROM and RAM and what do they stand for?

4 marks

Question 3

Answer…

Question (6 marks) …Complete the following table:

Name Direction Description

Address Bus Uni-Directional Send the address of the data being sent or required

Data Bus Uni-Directional biSends data of the current instructions being worked out. Can be used for sending data to processor to be processed

Control Bus Bi-DirectionalSends signals telling the processor and I/O devices what to do.

2 marks 3 marks

Question 4

Answer…

Width 4 wires; 4 15

Width 6 wires; 6 63

Width 10 wires; 10 1023

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

0 marks

Question 5

Answer…

Input: Mouse, Keyboard and Microphone

Output: Monitor, Headphones and Projectors

Both: Touch Screen and Gaming Headset (With Mic and Speaker)

Question (8 marks) …Name 3 input peripherals and 3 output peripherals and 2 that could be both…

8 marks

Question 6

Answer…

USB stick, External Hard drive, SSD Card

Question (3 marks) …Name 3 secondary storage devices…

2 marks

Question 7

Answer…

An I/O controller is

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

0 marks f o r s e n b o y s

Question 8

Answer…

The Stored Program Concept works around programs that are stored while the PC is running/ Currently active programs. In RAM. Must be fetched

Question (2 marks) …Define the stored program concept:

1 marks

Question 9

Answer…

ALU stands for Arithmetic Logic Unit and it performs of the logic/calculation based instructions that are sent to the processor from the data bus

Question (2 marks) …What does the ALU stand for and give a description of its function.

2 marks

Question 10

Answer…

3.4 MHz means 3.4 Million Hertz per second so 3,400,000 hertz per second

Question (2 marks) …What does 3.4MHz mean?

1 marks

Question 11

Answer…

Registers are quick short term memory used for storing information required for calculations currently in progress. They contain extremely fast memory

Question (2 marks) …What are registers:?

2 marks

Question 12

Answer…

Program Counter(PC): Counts the amount of programs currently running.

(CIR)

(MIR) – Memory ….. Register

(MDR)- Memory Data Register

Question (8 marks) …Name 4 registers used by the processor and explain what each does:

3 marks

Question 14

Answer…

Increasing clock speed means your processor has to work a lot quicker than it usually would . This mean its gets a lot hotter and so the processor requires extra cooling else the PC could over heat. The term used for increasing clock speed is Overclocking as you are forcing the processor to work faster than it was made for. This can be incredibly risky and can damage your PC.

Question (2 marks) …What draw back might increasing clock speed bring?

2 marks

Question 15

Answer…

The instruction set is the amount of instructions that the CPU is able to understand and this can limit what the CPU is able to do.

Question (2 marks) …What is the instruction set:

1 marks

Question 16

Answer…

4 bit opcode could understand 16 different instructions.

The largest number that could be used as data would be 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?

1 marks

Question 17

Answer…

LOAD #34

ADD #35

STORE 100

Question (3 marks) …Using the LOAD / ADD / STORE instructionsWrite some assembly code to

34 + 35 put in memory location 100

Question 18

CIR can be populated by a greater variety of instructions than the CISE

Question (1 marks) …

What effect will having a RISC or CISC have on the contents of the CIR?

SCORE

39/ 56

This sure is heavy….

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