L01-Intro-comp1 - King Fahd University of Petroleum...

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King Fahd University of Petroleum & Minerals College of Computer Science & Engineering Information & Computer Science Department Lecture 1 : Introduction ICS102 - Introduction to computing
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ICS102: Intro To Comp 2 Components of a Personal Computer Questions : - what are the input devices ? - what are the output devices ?
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ICS102: Intro To Comp 3 A motherboard, provides the electrical connections by which the other components of the system communicate and hosts the central processing unit as well as other subsystems and devices. Motherboard
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ICS102: Intro To Comp 4 Motherboard example : Acer E360
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ICS102: Intro To Comp 5 (CPU (Central Processing Unit The Central Processing Unit ( CPU ) or processor is the portion of a computer system that carries out the instructions of a computer program and is the primary element carrying out the computer's functions. In an addition operation, the arithmetic logic unit ( ALU) will be connected to a set of inputs and a set of outputs . The inputs provide the numbers to be added, and the outputs will contain the final sum. Example: (3 + 2) = 5 3 2 5
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ICS102: Intro To Comp 6 CPU memory Registers Cache Main memory (RAM): Data has to be in main memory so that CPU can access it Volatile: lost when program exits; computer shuts off Hard Disk, CD, etc. Persistent This is where you keep the data for long-term storage Memory Memory refers to computer components, devices, and recording media that hold digital data used for computing for some interval of time. There are mainly three types of memory :
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ICS102: Intro To Comp 7 … Main Memory 1002 1003 1004 1005 Cell Address Memory is divided into Many memory locations (cells) Each memory cell has a  numeric  address , which  uniquely identifies it Each cell contains a data value, e.g. 22
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ICS102: Intro To Comp 8 … Main Memory
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ICS102: Intro To Comp 9 The word “Hello.” stored in 6 memory cells … Main Memory
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