computers.avi

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1. COMPUTER CASES
There are three major cases in a computer which you might want to know about. One is called an at case which means that the standard for the at case has a two plug supply to the motherboard, a keyboard, and peripheral slots all in standard locations. The second type case is an atx case which has one plug supply to the motherboard, keyboard, com ports, printer ports, and usb ports all in standard locations.
2. MOTHER BOARD
A motherboard is what everything plugs into, and without one you can't do much with your computer. It is what I would call the most important part of your computer.There are three major types of motherboards. They are at, atx, and proprietary. You will only mostly deal with at and atx. There are four main buses on the motherboard. They are power bus, address bus, data bus, and a control bus. A bus is a bundle of wires that send info through them.
3. MICROPROCESSORS
Microprocessors are what we would call brains. They think for the computer and most info except for DMA (direct memory access) goes from application etc.. to CPU and then to memory. Most modern CPU chips have 8 registers on them. They are data, address, accumulator, program counter, instructions, flag, alu, and a fpu. Registers are storage places for data, numbers etc... the program counter stores the addresses of the next instructions to be done. The instruction register holds the current instruction.
4. HARD STORAGE
Since most people are familiar with such things as a CD-ROM drive. I wont go scrutinize about hard storage. I will just briefly cover it. Most computers typically have a 3 ½ floppy drive, usually assigned to drive letter A. what a lot of people do not know is that there is 3 types of 3 ½ floppies. There is a double density that formats to 720 kb. Then they came out with a high density disk that formats to 1.44 Mb which is twice as much as the double density disk. After the high density disk came the super density disk which formatted came to 2.8 Mb which as you might have guessed is twice as much as the high density disk.
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Category:

Science & Technology

Tags:

• BIOS
• motherboard
• computer cases
• keyboard
• DMA (direct memory access)
• application
• CPU
• CD-ROM drive