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The System Unit. Definition: A case that contains electronic components of the computer How it works: It is used to process data. The Motherboard. Definition: The main circuit board of the system unit
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The System Unit • Definition: A case that contains electronic components of the computer • How it works: It is used to process data
The Motherboard • Definition: The main circuit board of the system unit • How it works: Many electronic components connect to the motherboard and the motherboard reads them
Processor • Definition: Interprets and carries out the basic instructions that operate a computer • How it works: Overall operates a computer
The Control Unit • Definition: component of the processor that directs and coordinates most of the operations in the computer • How it works: it interprets each instruction issued by a program and then initiates the appropriate action to carry out the instruction.
The Arithmetic Logic Unit • Definition: A component of the processor • How it works: Performs arithmetic, comparison, and other operations
Machine Cycle • Definition: performs the four operations of a processor • How it works: It fetches, decodes, executes and stores information
Comparison of Personal computer Processor • Definition: The leading processor chip manufactures for personal computers are Intel, AMD Transmeta, IBM, and Motorola
Expansion Cards • An opening in a computer where a circuit board can be inserted to add new capabilities to the computer. • Accelerator • Controller • Game • I/O • Interface • Memory
Expansion Slots • An opening for an adapter to the motherboard • PCI Express • AGP • PCI • ISA • MCA • VLB • CardBus/PC card/PCMCIA ExpressCard • CompactFlash • SBus • Zorro • NuBus
PC Cards • Used to add memory, disk drives, sound, and fax to laptop
Ports • Point of attachment of a cable to the system unit • Used to join a cable to a device
Special Purpose Ports • 3 types are MIDI Port , SCSI port, and Universal Serial Bus Port • They all attach to different types of ports such as computers or musical instruments