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Table Of Contents  CertiGuide to A+ (Core Hardware)
 9  Chapter 0001:  Power Supplies - System Board

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XX  Chapter 0001: Summary

It was revealed how a power supply behaves which displays how power surges can pass through to the PC, regardless of the connection type AT or ATX. The similarities and differences between these two form factors have been explained from power connection and capabilities.

The function of chipsets and how they affect capabilities is unveiled as well as how BIOS enhances or limits the PC. You have seen that the BIOS may be ‘flashed’ if you have an EEPROM.

The functions of POST have been explained along with the fact this is only performed during a Cold Boot.

The various bus structures from I/O to ISA, PCI and AGP has been discovered. The roles of IRQ and DMA have been shown as critical components. You discovered the role of memory mapping and how logical names make life simpler for us humans.


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