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Input and Hardcopy Devices
This section gives a brief introduction to the functioning of some well known input and hardcopy devices. Input devices include keyboard, mouse, scanners, joysticks, digitizers data gloves, touch panels and a few more. Hardcopy devices that are discussed are mainly printers. You can start with reading the following.
You can look at an input device in two ways: physically what it is, and logically what it does. Physically, each of the devices like mouse, keyboard, joysticks or trackball are like a small gadget whose use can be manipulated by hands. It then measures these manipulations and sends corresponding numerical information back to the graphics program.
Consider a raster system with the resolution of 1024 x 768 pixels and the color palette calls for 65,536 colors. What is the minimum amount of video RAM that the computer must have
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basic video controller operations
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