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Simple question: What is the role of a bus bridge?

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it lets the bus cross the river? – quack quixote Jun 14 '10 at 15:27
To provide service between stations when the trains aren't running? – Spiff Jun 14 '10 at 15:51
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In computer terminology, a Bus Bridge connects two different buses together - and we are not talking about yellow Buses here.

Computers have evolved different standards for interfacing with peripherals, etc. Common Bus Bridges you see are PCI to PCMCIA adapters that are actually bus bridges. or PCI-E to ExpressCard bus bridges.

Basically, a Bus Bridge allows you to interface two different Bus types - boring, but true answer.

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read "what every programmer should know about memory", within section 2 the role of bridges are explained.

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Please don't just link to answers. Copy and paste the answer here in quotes and then link to your source. In a year or two, when someone else is looking for the same answer, there's no guarantee that site will still be up. – MDMarra Jun 15 '10 at 11:08
read that article and you will find, that the copyNpaste version would be rather long. – akira Jun 15 '10 at 11:39
I'd still add a brief summary, so that the answer is still useful in the event that the link breaks someday. – Kara Marfia Jun 15 '10 at 13:04
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