• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month
  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11

Computer Architecture

Extracts from this document...


UNIT 9 - COMPUTER ARCHITECTURE Assignment 3 Table of Contents Task 1 3 Von Neumann Architecture 3 Definitions 3 Current Architectures 4 Task 2 5 Microprocessor 5 Memory 6 Pipelining 6 Parallel Processing 7 Task 3 8 Fetch - Decode - Execute 9 Task 4 10 Core Duo vs. G5 10 Bibliography 11 TASK 1 Von Neumann Architecture Definitions (Wikipedia n.d.) Memory - Where the data to be read or executed is located. Control Unit - The control unit coordinates and controls all the operations carried out by the computer. It operates by repeating three operations: fetch, decode and execute. ALU (accumulator) - The ALU can perform two sorts of operations on data. Arithmetic operations include addition, subtraction, multiplication and division. Logical operations consist of comparing one data item with another to determine whether the first data is smaller than, equal to or greater than the second data item. Arithmetic - Add, Subtract Logic - If Greater than, If less than Data manipulation - Move command, Input command Flow Control - Go to command, Brach off command Input - Data is sent to the input when it is called. Output - Data is outputted when it has been executed. ...read more.


However, this type of parallel processing requires very sophisticated software called distributed processing software. TASK 3 Op-Code (1 byte) Operand (3 bytes) Meaning 01 Memory address Load Register A with the contents of the 4 bytes of memory starting at the address defined in the Operand 02 Memory address Load Register B with the contents of the 4 bytes of memory starting at the address defined in the Operand 06 Not used (Set to 000000) Add the contents of the Register A to Register B and store the result in Register C 05 Memory address Store the contents of Register C at the 4 bytes of memory starting at the address defined by the Operand A program written for this microprocessor consists of the following 4 instructions (shown in hex): 01000250 02000254 06000000 05000258 Address 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 000200 01 00 02 50 02 00 02 54 06 00 00 00 05 00 02 58 000210 000220 000230 000240 000250 00 00 00 FF 00 00 01 00 00 00 01 FF Program Counter (Hex) Instruction Register (Hex) A (Hex) B (Hex) C (Hex) ...read more.


For the majority of performance tests that I conducted on the iMacs, leaving the G5 set to Automatic actually gave me performance within about 3% of the system's performance if I set the energy saver setting to Highest. However, there were some benchmarks where the iMac incorrectly would not increase CPU frequency in order to accommodate a very high demand task. The best example that I could find was my QuickTime Pro 7 H.264 encoding test. With the G5 running in Automatic mode, the test took over 25 minutes to complete, compared to 9.8 minutes for the Core Duo. Setting the processor performance to Highest, the G5's time dropped down to a more respectable 12.3 minutes, a reduction of more than 50%! The goal of the Automatic processor performance setting should be to crank up CPU frequency when it's needed, and scale it back when it's not. The results that I saw in my QuickTime test show that it fails at that goal in a major way, which isn't acceptable. There were a few other isolated cases where the same was true, forcing me to leave the iMac G5 in its highest performance state for all of my performance tests. In conclusion to this review I found that the Core Duo processor is far more effective and is even slightly cheaper than the G5 version. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Information Systems and Communication section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Information Systems and Communication essays

  1. Marked by a teacher

    Database Coursework on a Vehicle Rental System: Analysis

    5 star(s)

    the Date to be Returned and R refers to the Daily Rental rate of the vehicle. The reason why (D-B) is squared is so that the longer overdue a vehicle is, the more severe the overdue fee will be. 15.

  2. The Impact of Mobile Phones on social Interaction

    to a growing sense of independence from both family and collectively (from peers) References 1. WTD 2000 - Message by the ITU Secretary-General (URL: http://www.itu.int/newsarchive/wtd/2000/message.html). [5 March 2002] 2. Cell phone industry booms (URL: http://abcnews.go.com/sections/scitech/DailyNews/cellphonecensus020124.html) [27 February 2002] 3. Statistics of Mobile Commerce (URL: http://www.epsltd.com/IndustryInfo/Statistics/mobilestats.htm)

  1. ict as level coursework

    There are 3 products per product range for example there are 3 shampoos in the shampoo range. Simply click the catalogue number that is desired and the product name and price display automatically. All that you have to do in this process is manually type the quantity that is required.

  2. System Analysis and Design Assignment

    The cards may get lost or put in the wrong place. The loans file could become damaged. * How a Member Reserves a Book A member may wish to borrow a specific book from the learning centre library, only to discover that the book has already been borrowed and is not available.

  1. Applications and Extensions - Computer Experience.

    9.10, I hear the bell again. 9.25, We listen to a French cassette on a tape player. 10.10, I hear the bell again. 10.30, We watch a German video. 11.15, Again I hear the bell. 11.25, Use Vending machine 11.35, Again I hear the bell. 11.45, The teacher uses a overhead projector.

  2. transmission of care values

    Safety Needs - A service user may feel emotionally and physically threatened if not listened to, as they would not be able to make their needs understood. Social Needs - A sense of isolation and exclusion may occur when barriers prevent effective communication.

  1. Communication & Employability Skills for IT. OCR Cambridge Technicals Unit 1 LO1-P1

    correct rooms also need to keep their own office desk tidy to make the business look nice and professional. A job description is a written statement that describes the: * Overall information about the jobs position- this tells the applicant about the tasks that they may be undertaking whilst doing the job.

  2. Discuss the Causes and Effects of the Digital Divide

    that required knowledge and that discouraged many women from using these newer technology but now as the old fashioned ideology has been demolished the divide between men and women has been closed. Technology does not only mean computers, mobile phones, mp3 players, laptops, games consoles and televisions are also hardware that people use.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work