• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

Computer Subsystems - Internal Bus Architecture

Extracts from this document...

Introduction

Computer Subsystems. TASK 1 A) Internal Bus Architecture Bus Architecture is wires inside a computer where data is taken from one part of the computer to another. This bus connects all the computer components to the processor and main memory. There's also the extended bus, which connects your CD-ROM and Floppy drive to your main board. There are also expansion boards, which go into the main board called AGP, PCI, and CNR ports. These ports connect your graphics card, sound card or modem. All buses are split into two parts called the address bus and the data bus. The data bus transfers the data and the address bus tells the data where to go. The width of the bus is important because it tells you how much data can be transmitted at one time. This bus can transmit 16 or 32 bits at one time. ...read more.

Middle

Each instruction has to be fetched, interpreted and executed in turn. Immediate Access Store is basically Random Access Memory (RAM). Any program can randomly access this type of computer memory. Any byte of memory can be accessed without touching the bytes that are being used. RAM is the most common type of memory, which is found in computers and other devices such as printers. C) The Fetch - Decode - Execute Cycle. This cycle is executed when a computer program is activated; the program is a set of instructions. This set of instructions will normally be stored in the Main Memory. It is the job of the processor that controls the computer to decide what action to take with these instructions. At the beginning of a program the Program Counter is set to point at the memory location where the start of the program can be found. ...read more.

Conclusion

The opcode could be e.g. ADD or MOV. The Basic Function of an Operating System The Operating System is the most important program that runs on your computer. Every computer must have an operating system to run other programs. Operating systems perform basic tasks, such as recognizing input from the keyboard, sending output to the display screen, keeping track of files and directories on the disk, and controlling peripheral devices such as disk drives and printers. The operating system has tasks like making sure data is stored in the right memory locations. The operating system acts as a translator which lets the hardware and software to talk to each other. The fetch, execute and decode cycle enables the operating system to start running a program, decode the program and execute the program. TASK 2 A) Instruction R0 R1 555 556 SWI GETINT 5 ���� ���� ���� MOV R1, R0 5 5 ���� ���� STR R1, 555 5 5 5 ���� ADD R1, R1 5 10 5 ���� STR R1, 556 5 10 5 10 HLT ...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 Computer Science 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 Computer Science essays

  1. Peer reviewed

    Principles of Computer Networks

    3 star(s)

    It is restricted to networks which are carrying variable-size packets. It works with to lower layer of the OSI model. The data link layer and the physical layer. It further splits the data link layer into Logical Link Control and Media Access Control.

  2. Control Unit, Memory Unit, and Arithmetic Logic Unit. The CPU or Central Processing ...

    ROM is memory that cannot be altered. This means that even switching the computer off will not effect the contents of the ROM. There is very little that needs to be stored in ROM so it tends to be very small. This type of memory holds a special program that starts running when the computer is turned on.

  1. Fetch Decode and Execute

    Say for example the data that we fetched was the ASCII value (hexadecimal) of A, this would then be translated into the letter A. Execute: Once the above steps have been completed the processor is ready to execute the command.

  2. Computer Architecture

    Task 3 (P5) Describe the key components of a computer architecture and how they interact 1. Data Buffer - this is a region of memory used to temporarily hold data while it is being moved from one place to another.

  1. Smart Card System

    Others use the term ``triple-DES'' for E(K1,D(K2,E(K3,x))) or E(K1,E(K2,E(K3,x))). Key encrypting keys may be a single DEA key or a DEA key pair. Key pairs should be used where additional security is needed (e.g., the data protected by the key(s) has a long security life). A key pair shall not be encrypted or decrypted using a single key.

  2. CP3 - Proposed Solution to a Realistic Problem - Apartment Administration software

    the data as soon as it has been inserted into the system. Real time processing This sort of processing means the computer has to keep up with data input from an external operation. It has to process data instantly and produce results that can be output immediately.

  1. Creating a computer system for Wooten Basset Rugby Club

    * Create leagues of the club's leading scorers and those with the worst disciplinary records. * Store data about what type of training each player is on. For example some players may have fitness training or others forwards training. * Monitor finances for each fixture.

  2. This technical report will look at various different memory devices and how they are ...

    it is sustained by a small long-life battery embedded within the system itself. In special purpose computers used, for example, in washing machines and video recorders, the program instructions are stored in ROM. Programmable Read-Only Memory PROM (Programmable Read-Only Memory)

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