Southbridge (computing) Guide, Meaning , Facts, Information and Description
The Southbridge is one of the two chips in the chipset on a PC motherboard that defines the capabilities of the motherboard. The other chip is the Northbridge. A particular southbridge will usually work with several different northbridges, but these two chips must be designed to work together; there is no standard for interoperability between different core logic designers.The Southbridge chip normally defines and controls the operation of all buses and devices that are not handled by the northbridge. This almost always includes the PCI bus, the PS/2 interface for keyboard and mouse, the serial port, the parallel port, and the floppy drive controller. Some of these functions are often handled by a secondary I/O controller, and in that case the southbridge provides an interface to this chip.
On newer machines, it will also generally include support for the parallel ATA interface and/or Serial ATA (for connecting hard drives, CD-ROMs, etc.), an Ethernet interface, USB, and IEEE 1394 (Firewire).
Some southbridges implement additional features such as a RAID controller or an integrated audio codec (integrated sound card).
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