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Why Plug n Play is Sometimes Plug and Pray
Some expansion hardware is designed
to emulate a name-brand competitor.
If the BIOS on the expansion hardware
masquerades as a name-brand device the Operating System will follow
instructions to install the driver of the name-brand expansion card.
Since it wasn't from the name-brand
manufacturer, the new device will either exhibit unpredictable behavior,
or completely fail.
And sometimes a driver gets corrupt
or was simply a piece of junk to begin with.
Prior to PCI Version 2.1 all expansion cards needed their own IRQ (if a device was to be used at the same time another device with the same IRQ would be in use). With the release of PCI V.2.1 that is no longer the case. Expansion cards can share IRQs.
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CertiGuide to A+ (Core Hardware) (http://www.CertiGuide.com/aplush/) on CertiGuide.com
Version 1.0 - Version Date: December 6, 2004
Adapted with permission from a work created by Tcat Houser.
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