chap3 - Computer Science Department(CSD Centre for...

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FOSEE , MULTIMEDIA UNIVERSITY (436821-T) MELAKA CAMPUS, JALAN AYER KEROH LAMA, 75450 MELAKA, MALAYSIA. Tel 606 252 3594 Fax 606 231 8799 URL: http://fosee.mmu.edu.my/~csd/ Computer Science Department (CSD) Centre for Foundation Studies and Extension Education (FOSEE) PCA 0015 Computer Applications Foundation in Engineering ONLINE NOTES Chapter 3 System Unit
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PCA0015 Computer Applications Chapter 3 Objectives: Upon completion of this topic, the students should be able to: Identify the components in the system unit. Explain how the CPU uses the four steps of a machine cycle. Describe how a series of bits can represent data. Identify types of memory inside the system unit. Describe the types of expansion slots and expansion cards in the system unit. Explain each bus that connects devices inside the system unit The system unit is the box or cabinet ; which can be a tower or desktop . Inside it there are: 1. Motherboard (or System board) The motherboard is the most important component in your computer system. It is the backbone that supports all the other computer components. Think of a motherboard as a scale model of a futuristic city with many modular plug-in buildings, each using power from a common electrical system. Multiple-lane highways of various widths transport data between the buildings. The motherboard is the data and power infrastructure for the entire computer. CSD Lecturer 2/18
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PCA0015 Computer Applications Chapter 3 The original IBM PC which premiered in 1982; featured a motherboard, was a large printed circuit card that contained the Intel 8088 microprocessor, RAM and a collection of slots that auxiliary cards could plug into. If you wanted to add a modem, you had to buy a separate card and plug it into one of the slots. This approach was originally pioneered in the mass market by the Apple II machine. By making it easy to add cards, Apple and IBM accomplished two things: 1. They made it easy to add new features to the machine over time. 2. They opened the computer to creative opportunities by third-party vendors. Chips and sockets are soldered onto the motherboard. On the motherboard, you will typically find: one or more microprocessors memory slots chip sets – CMOS, BIOS, etc adapter card slots – PCI, AGP, ISA ports - USB, PS/2, etc cooling fan(s) on heat sinks of processor 2. Central Processing Unit (or Microprocessor) A central processing unit or processor is on a chip which is a piece of semi-conducting material made of silicon. It usually no bigger than one- CSD Lecturer 3/18
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PCA0015 Computer Applications Chapter 3 half-inch square. Silicon is a semi-conductor whose electrical properties are between a good electrical conductor and a non-conductor. An integrated circuit is a microscopic pathway capable of carrying
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This note was uploaded on 06/16/2011 for the course ENGR 101 taught by Professor Ahmed during the Summer '11 term at Multimedia University, Cyberjaya.

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chap3 - Computer Science Department(CSD Centre for...

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