INPUT/OUTPUT ORGANIZATION • Accessing I/O Devices • I/O interface • Input/output mechanism Memory-mapped I/O y pp / Programmed I/O Interrupts Direct Memory Access • Buses Synchronous Bus Asynchronous Bus I/O in CO and O/S • • • Programmed I/O Interrupts DMA (Direct memory Access) A bus is a shared communication link‚ which uses one ‚ set of wires to connect multiple subsystems. The two major advantages of the bus organization are versatility and low cost. Accessing I/O Devices
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Chapter 9 Input/Output Devices Contents: I. Introduction II. Input Devices a. Keyboard‚mouse‚joystick‚scanners‚digital camera‚ bar code reader‚ touch Sreeen‚Speech input device (microphone) III. Output Devices a. Monitor ‚ Speaker‚ Printers ( different types) ----------------------------------------------------------------------------------------I. Introduction The computer will be of no use unless it is able to communicate with the outside world. Input/Output devices are required for users to
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of a new printer‚ is to use the “add a printer” control panel option. One of the ways you can find out in windows what printer is installed on the computer is in “devices and printer”. You can access this by going to start‚ click on the control panel‚ from there a window will pop up‚ click on hardware and sound‚ double click on devices and printers. You can add a printer in the add a printer tab. Once you hit the tab‚ the computer will ask you how printer is connected to the computer for example:
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Different Kinds of Input Devices Computers support various input and output devices to maximize functionality. An input device is any piece of hardware that provides data and controls various signals as they process through the computer. If a computer did not use any input devices‚ users would watch the activity‚ as opposed to interacting with it. Each type of input device serves its own purpose‚ ranging from a simple pointing device to a webcam. Have a question? Get an answer from Online Tech
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1. Five factors you should consider when assessing the suitability of hardware device for connecting to a computer is; Speed‚ Cost‚ Security‚ Capacity‚ Reliability. 2. When installing a new component into a computer system the tasks involved are; Add the component to the computer‚ either connecting in through an existing port or plugging it into an expansion slot in the motherboard. The available ports on most computers include serial‚ parallel and universal serial
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output device is a computer hardware which is used to communicate the electronically obtained information resulted by processing performed by an information processing system such as computer into human readable form. 2.1 Video display devices It is an electronic device which is used as an output device to represent information in visual form. For example CRT‚ LCD monitors‚ Television screen etc. Let us discuss some key concepts to be used for better understanding of video display device Phosphor:
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operating system that I have chosen is a particular service operation: the realisation of a music concert. As every other organisation that produce goods or services‚ it has a precise operating system‚ composed by a range of inputs‚ a transformation process and a final output. INPUTS - We must distinguish between two different kind of resources: transformed resources‚ that are the resources treated and transformed in some way‚ and transforming resources‚ that are the resources that act upon the transformed
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(CPU) of a computer system. A central processing unit (CPU)‚ also referred to as a central processor unit‚ is the hardware within a computer that carries out the instructions of a computer program by performing the basic arithmetical‚ logical‚ and input/output operations of the system. In the computer industry‚ the terms computer and CPU are often used interchangeably. Computing power starts with the most limited microcomputers which are laptop computers‚ netbook computers‚ PDAs and cell phones
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Pointing Devices are direct entry input devices. They allow users to control the pointer and the insertion point on the screen. Examples of pointing devices are mouse‚ trackball‚ touch pad‚ pointing stick‚ joystick‚ touch screen‚ light pen and graphics tablets. A mouse is a computer device‚ which has a ball sealed at the bottom. It is attached with a cable to the system unit. When rolled on the flat surface‚ the movement of the ball will generate electrical circuits‚ which are then sent to the
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INPUTS The main input of the UPS’s package tracking system is the scannable-bar coded label which is attached to a package. Customers can download and print their own labels using special software provided by UPS or by accessing the UPS website. This scannable label contains detailed information about the sender‚ the destination of the package‚ the recipient‚ and when the package should arrive. PROCESSING Before the package is even picked up‚ the data from the scannable bar coded label is
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