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  • Level: GCSE
  • Subject: ICT
  • Word count: 2766

What is hardware?

Extracts from this document...

Introduction

REPORT ON HARDWARE BY: REBECCA SOTOMI 10 M What is hardware? Hardware is the physical devices that can be touched and used to send or receive messages or information to and from one person to another person. The components of a computer system are: * Input devices- these get data into the computer. * The main processor unit- this manipulates the data. * The storage devices- these save data. * The output devices- these display the data in soft or hard copy. * The cables and connectors that join it all together. There are three types of hardware. These are: 1) INPUT DEVICES These are the tools used to enter data, commands and information into the computer's central processing unit (C.P.U). The most common input devices are: * Keyboard * Mouse * Scanner * Digital Camera * Joy stick * Roller ball * Microphone. Keyboard This is the most common and widely used input device. It is used to key in data. Touching or pressing a key sends an electronic signal to the computer that interprets it as a character or function. Some special keyboards include touch sensitive keyboards, braille keyboards, mobile phone keyboards and Large-keyed colour coded keyboards, amongst others. Keyboards are divided into four main areas are: ? Function keys across the top ? Letter keys in the main section ? A numeric keypad on the right ? Cursor movement and editing keys between the main section and the numeric keypad. Mouse This is a pointing device used to control the movement and position of the cursor by moving the mouse around on a flat surface such as a desk. ...read more.

Middle

A typical CD holds around 650MB of data, which is equal to 450 1.4MB floppy disks. The CD- drive has a read only memory, which means you cannot alter or store data. However, CD writers are now available that enable data to be written to CD. These enable you to make copies of music on CD and are increasingly being used for backing up hard drives. CONNECTORS, NETWORKS, NETWORK PROTOCOL Cables connect the different components of a computer system. When a system is set up it is important to check the input or output devices are connected to the main processing units correctly or the computer won't operate. The former means of connecting the computer were through Ports. Ports are sockets at the back of the main processor causing, which are used to attach the peripheral devices e.g. printer, monitor, keyboard, mouse and so on e.t.c. Cables from each peripheral plug into ports allowing data to be sent and received from the microprocessor. There are two types of ports * Serial ports: - Transmits data one at a time. They are known as COM1, COM2 and are referred to as male connectors because they have pins * Parallel ports: - This on the other hand transmits data in bytes, which is much faster than serial. Parallel ports are LPT1, LPT2 and are designated female connectors because they have receptacles for the pins. Nowadays there are new connectors for computers. They are: - ?USB (Universal Standard Bus) Allows a wide variety of computer peripherals to be easily connected to most PC's, Windows 98/2000 and this is a newfound saviour from parallel and serial ports. ...read more.

Conclusion

* Ideal for connecting high-end consumer electronics like digital A/V equipment also specialised computer peripherals. * Fire wire does not require the computer to be rebooted to recognise newly connected devices also is USB, fire wire is capable of higher data transfer * It is also better applied to high-band width multi- media applications such as digital A/V peripherals. * It was bided from e-bay starting from �1 System Requirements PC Users * Built-in Fire Wire port or a Fire Wire PCI adapter (OHCI compliant) * Minimum 32 MB RAM * Minimum 200 MHz processor * Windows 98 SE (second edition) or higher * CD-ROM drive Macintosh Users * Fire Wire-enabled Macintosh computer * Minimum 32 MB RAM * Mac OS 8.6 or higher * CD-ROM drive BENEFITS OF FIRE WIRE 1. The devices are addressed dynamically and instantly when connected and yet does not require host computer to be restarted. 2. Unlike SCSI, no cable termination is required and devices can be connected in different configuration. 3. Ultra-high sped capabilities of fire wire make it a perfect match for connecting digital air peripherals. The main disadvantage of Fire wire is that it is very expensive and so most people could not afford. Old computers do not have the fire wire connectors and because of the high quality they will throw away the old for the new contributing to waste. Fire wire Adapter Is a 1/0 card installed in computer and provides a number of fire wire ports. Star Tech.com has 3-port and 4-port PCI 1/0 fire wire cards as well as Card bus version for notebook computers. Fire wire cable Connects fire wire adapter to fire wire peripherals. The cable is 6-wire shielded twisted pair type. 3 PORT PCI ADAPTERS. ...read more.

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