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peripheral component interconnect : FOLDOC | Peripheral Component Interconnect (PCI) A standard for connecting peripherals to a personal computer, designed by Intel and released around Autumn 1993. PCI is supported by most major manufacturers including Apple Computer. It is technically far superior to VESA's local bus. It runs at 20 - 33 MHz and carries 32 bits at a time over a 124-pin connector or 64 bits over a 188-pin connector. An address is sent in one cycle followed by one word of data (or several in burst mode). PCI is used in systems based on Pentium, Pentium Pro, {AMD 5x86}, {AMD K5} and {AMD K6} processors, in some DEC Alpha and PowerPC systems, and probably {Cyrix 586} and {Cyrix 686} systems. However, it is processor independent and so can work with other processor architectures as well. Technically, PCI is not a bus but a bridge or {mezzanine}. It includes buffers to decouple the CPU from relatively slow peripherals and allow them to operate asynchrono
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