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Video Card Interfaces
As you learned in Chapter 0001, PC
expansion cards have gone through their own evolution with the way in
which they interface with the system board.
It should not surprise you that video
cards have been in the middle of this evolution since it's beginnings.
Video cards have been produced in 8-bit
ISA, 16-bit ISA, and MCA architectures.
Video card technology really took off with the
introduction of VESA Local Bus.
It was at this time that the Windows
operating system was gaining popularity and the processor-video card
bottleneck really became an issue.
VLB & PCI Video Cards
VLB video cards provided a significant performance boost over ISA cards due to their 32-bit bus architecture. Nearly as soon as they arrived however, Intel introduced its Pentium class systems with their new PCI bus architecture. This new architecture introduced in 1993 has until recently, reigned as the new champion for popular video card interface. PCI video cards are still in wide use today, but like everything in the IT industry, there's a new kid on the block that has taken over the throne.
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CertiGuide to A+ (Core Hardware) (http://www.CertiGuide.com/aplush/) on CertiGuide.com
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