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Unformatted text preview: All-In-One / CompTIA Network+ All-in-One Exam Guide / Meyers & Jernigan / 170133-8 / Chapter 8 C HAPTER Expansion Bus 8 In this chapter, you will learn how to • Identify the structure and function of the expansion bus • Describe the modern expansion bus • Explain classic system resources • Install expansion cards properly • Troubleshoot expansion card problems Expansion slots have been part of the PC from the very beginning. Way back then, IBM created the PC with an eye to the future; the original IBM PC had slots built into the motherboard—called expansion slots—for adding expansion cards and thus new functions to the PC. The slots and accompanying wires and support chips on the first PC and on the latest and greatest PC are called the expansion bus. The expandability enabled by an expansion bus might seem obvious today, but think about the three big hurdles a would-be expansion card developer needed to cross to make a card that would work successfully in an expansion slot. First, any expansion card needed to be built specifically for the expansion slotsthat would require the creation of industry standards. Second, the card needed some way to communicate with the CPU, both to receive instructions and to relay information. And third, the operating system would need some means of enabling the user to control the new device and thus take advantage of its functions. Here’s the short form of those three hurdles: • Physical connection • Communication • Drivers This chapter covers the expansion bus in detail, starting almost at the very beginning of the PC—not because the history of the PC is inherently thrilling, but rather because the way the old PCs worked affects the latest systems. Installation today remains very similar to installation in 1987 in that you must have a physical connection, communication, and drivers for the operating system. Taking the time to learn the old ways first most definitely helps you understand and implement current technology, te...
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This note was uploaded on 04/27/2010 for the course COMPTIA 1201 taught by Professor N/a during the Spring '10 term at Galveston College.

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