ARCHIVED: What is a local bus?

A local bus is a data bus (the circuits that transport data within the computer) that connects directly, or almost directly, to the CPU. Local buses generally support a limited number of devices, but provide very fast access to the processor. The first local bus was the VESA local bus. Current PCs have a PCI and an AGP local bus and an ISA expansion bus for older and slower devices. Due to advances in computers and the need for ever-faster access, ISA slots are being eliminated and replaced entirely with PCI and AGP local bus slots for internal expansion and USB ports for external expansion.

For more information on the local bus concept, see:

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