Chapter05 - Chapter 5 Computing Components Computer...

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Chapter 5 Computing Components
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2 Computer Components Consider the following ad:
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3 Sizes in Perspective Admiral Grace Murray Hopper A coil of wire nearly 1,000 feet long represents the distance traveled by an electron in the space of a microsecond. A 1 foot (30+ cm) piece of wire represents the distance traveled in the space of a nanosecond. A bag containing grains of pepper represents the distance traveled in the space
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4 Sizes in Perspective
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5 Stored-Program Concept Figure 5.1 The von Neumann architecture
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6 Arithmetic/Logic Unit Performs basic arithmetic operations such as adding. Performs logical operations such as AND, OR, and NOT. Most modern ALUs have a small number of special storage units called registers.
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7 Control Unit Control unit - The organizing force in the computer. There are two registers in the control unit: The instruction register (IR) contains the instruction that is being executed. The program counter (PC) contains the address of the next instruction to be executed. ALU and control unit comprise the Central Processing Unit , or CPU.
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Memory Memory is a collection of cells, each with a unique physical address. Page 122 5-8
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9 Flow of Information The parts are connected to one another by a collection of wires called a bus.
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Chapter05 - Chapter 5 Computing Components Computer...

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