Papel de uma ponte de ônibus [fechada]

Question

Pergunta simples: Qual é o papel de uma ponte de ônibus?

    

Answer 1

Na terminologia do computador, uma ponte de ônibus conecta dois ônibus diferentes juntos - e não estamos falando de ônibus amarelos aqui.

Os computadores desenvolveram padrões diferentes para fazer a interface com periféricos, etc. Pontes comuns de barramento que você vê são adaptadores PCI para PCMCIA que são realmente pontes de barramento. ou PCI-E para pontes de barramento ExpressCard.

Basicamente, uma Ponte de Barramento permite que você interfira em dois tipos diferentes de Barras - uma resposta chata, mas verdadeira.

    

Answer 2

Leia " o que todo programador deve saber sobre a memória ", na seção 2 o papel das pontes é explicado:

Over the years the personal computers and smaller servers standardized on a chipset with two parts: the Northbridge and Southbridge.

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All CPUs (two in the previous example, but there can be more) are connected via a common bus (the Front Side Bus, FSB) to the Northbridge. The Northbridge contains, among other things, the memory controller, and its implementation determines the type of RAM chips used for the computer. Different types of RAM, such as DRAM, Rambus, and SDRAM, require different memory controllers.

To reach all other system devices, the Northbridge must communicate with the Southbridge. The Southbridge, often referred to as the I/O bridge, handles communication with devices through a variety of different buses. Today the PCI, PCI Express, SATA, and USB buses are of most importance, but PATA, IEEE 1394, serial, and parallel ports are also supported by the Southbridge. Older systems had AGP slots which were attached to the Northbridge. This was done for performance reasons related to insufficiently fast connections between the Northbridge and Southbridge. However, today the PCI-E slots are all connected to the Southbridge.