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Table Of Contents  CertiGuide to A+ (A+ 4 Real)
 9  Chapter 8: Motherboards

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PCI Steering

Starting with Windows 95b (not the initial release of the OS) and OSR1, BIOS gained the ability to assign IRQs to devices. With OSR2 enabled, Windows 95 gained the ability to assign IRQs. This is known as PCI bus IRQ steering or PCI steering. Although with OSR2, Windows has the ability to assign the IRQs, those assignments are still typically made by the BIOS and Windows rarely overrides those assignments. Remember, this only works with the PCI bus. ISA has no steering capacity.


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