Pci Local Bus; Pci Features - American Megatrends Apollo User Manual

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PCI Local Bus

The Apollo motherboard conforms to the PCI Version 2.0 specification. This motherboard has expansion
slots for four PCI adapter cards. The PCI slots are automatically configured by the WINBIOS system BIOS.
PCI is a specification for a local bus standard. The PCI specification also provides the electrical specifications
for peripheral chip makers and the logic requirements for a PCI Controller. While PCI defines a local bus
standard, it also defines a standard component-level interface. PCI is a common I/O component interface.
The motherboard conforms to the Intel PCI specifications. The PCI Local Bus Specification is a standard set
of interface, architecture, timings, electrical, and physical specifications that permit all PCI local bus products
to be totally interchangeable. PCI is a multiplexed extension of the CPU bus. In PCI, the CPU bus control
mechanisms have been extended to optimize I/O support. PCI establishes a local bus standard where a large
variety of I/O components can be directly connected without using any glue logic.
What PCI Accomplishes PCI is a way to physically interconnect highly integrated peripheral components and
processor/memory systems.

PCI Features

Up to ten PCI loads can be used in the same system on the PCI bus, including the PCI Controller and an
expansion bus controller for computers based on the EISA, ISA, or MCA® architectures. PCI decouples the
CPU from the expansion bus, works at 30 or 33 MHz, and uses a 32-bit data connection path to the CPU.
Chapter 2 PCI 11
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