Hello, I gonna to know to day Organization of a Microcomputer : Hardware Organization Part-2.
Display :
The main output device for a microcomputer is the display device. In most microcomputers the display device is a Cathode Ray Tube ( CRT)G In Notebooks, it is often a flat panel device known as Liquid Crystal Display (LCD). The term monitor is used to describe the CRT display. This display monitor is very similar to a TV, but is designed to be viewed at much higher rates, typically more than 72 frames per second. The TV Displays images at only 30 frames per second.
The PC systems today use 14-,15-, and 17-inch displays. Larger displays are available but are very costly. High resolution and high refresh rates are needed to display computer generated text and images that do not flicker when viewed at close range. At present PC displays are able to display images with pixel resolutions in the 1024*768 range. This means 768 horizontal lines where each line contains 1024 picture elements or pixels. A pixel is the smallest picture element that can be created and displayed by the display monitor.
The monitor is attached to the computer through a short cable attached to the system units display adapter port. The display adapter attaches to the system bus. The display adapter is either integrated on the motherboard with the processor or installed as a separate adapter board so one slots of the expansion of the motherboard.
Keyboard :
Keyboard are sold with adapter plugs that can connect the keyboard to the keyboard port. An 8-bit microprocessor inside the keyboard is programmed to continuously scan the keyboard and report key presses and releases to the keyboard adapter. A keyboard adapter actually contains another 8-bit microprocessor that communicates with the keyboradr microprocessor and send the keystroke to the main processor through the system bus.
Display :
The main output device for a microcomputer is the display device. In most microcomputers the display device is a Cathode Ray Tube ( CRT)G In Notebooks, it is often a flat panel device known as Liquid Crystal Display (LCD). The term monitor is used to describe the CRT display. This display monitor is very similar to a TV, but is designed to be viewed at much higher rates, typically more than 72 frames per second. The TV Displays images at only 30 frames per second.
The PC systems today use 14-,15-, and 17-inch displays. Larger displays are available but are very costly. High resolution and high refresh rates are needed to display computer generated text and images that do not flicker when viewed at close range. At present PC displays are able to display images with pixel resolutions in the 1024*768 range. This means 768 horizontal lines where each line contains 1024 picture elements or pixels. A pixel is the smallest picture element that can be created and displayed by the display monitor.
The monitor is attached to the computer through a short cable attached to the system units display adapter port. The display adapter attaches to the system bus. The display adapter is either integrated on the motherboard with the processor or installed as a separate adapter board so one slots of the expansion of the motherboard.
Keyboard :
Keyboard are sold with adapter plugs that can connect the keyboard to the keyboard port. An 8-bit microprocessor inside the keyboard is programmed to continuously scan the keyboard and report key presses and releases to the keyboard adapter. A keyboard adapter actually contains another 8-bit microprocessor that communicates with the keyboradr microprocessor and send the keystroke to the main processor through the system bus.
