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Confused. Hardware pieces explanation. (EDB-AdressBus-Southbridge)
- Thread starter GeorgeZ
- Start date
badboyrog2
Distinguished
- Mar 5, 2014
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1 The external data bus (also known as the external bus or simply data bus) is the primary route for data in a PC. All data-handling components or optional data devices are connected to it; therefore, any information (code) placed on that bus is available to all devices connected to the computer.
2 address bus
An internal channel from the CPU to memory across which the addresses of data (not the data) are transmitted. The number of lines (wires) in the address bus determines the amount of memory that can be directly addressed as each line carries one bit of the address. For example, a 20-line address bus represents the binary number 1,048,576 and reaches that number of memory bytes (the size of the address bus in the IBM PC in 1981). A computer with a 32-bit address bus can directly address 4GB of physical memory, while one with 36 bits can address 64GB.
http://common.ziffdavisinternet.com/encyclopedia_images/ADDRSBUS.GIF
3 Northbridge
The high-speed part of a common chipset architecture in a computer. The Northbridge is the controller that interconnects the CPU to memory via the frontside bus (FSB). It also connects peripherals via high-speed channels such as AGP and PCI Express. The Northbridge may include a display controller, obviating the need for a separate display adapter.
The Southbridge controller handles the remaining I/O, including the PCI bus, parallel and Serial ATA drives (IDE), USB, FireWire, serial and parallel ports and audio ports. Earlier chipsets supported the ISA bus in the Southbridge. Starting with Intel's 8xx chipsets, Northbridge and Southbridge were changed to Memory Controller and I/O Controller
Northbridge Connects CPU to:
RAM
AGP bus
PCI Express bus
Built-in display Adapter
Southbridge Connects CPU to:
ATA (IDE) Drives
USB bus
FireWire bus
Serial port
Parallel port
Built-in audio
ISA bus (earlier PCs)
http://common.ziffdavisinternet.com/encyclopedia_images/NORTBRID.GIF
2 address bus
An internal channel from the CPU to memory across which the addresses of data (not the data) are transmitted. The number of lines (wires) in the address bus determines the amount of memory that can be directly addressed as each line carries one bit of the address. For example, a 20-line address bus represents the binary number 1,048,576 and reaches that number of memory bytes (the size of the address bus in the IBM PC in 1981). A computer with a 32-bit address bus can directly address 4GB of physical memory, while one with 36 bits can address 64GB.
http://common.ziffdavisinternet.com/encyclopedia_images/ADDRSBUS.GIF
3 Northbridge
The high-speed part of a common chipset architecture in a computer. The Northbridge is the controller that interconnects the CPU to memory via the frontside bus (FSB). It also connects peripherals via high-speed channels such as AGP and PCI Express. The Northbridge may include a display controller, obviating the need for a separate display adapter.
The Southbridge controller handles the remaining I/O, including the PCI bus, parallel and Serial ATA drives (IDE), USB, FireWire, serial and parallel ports and audio ports. Earlier chipsets supported the ISA bus in the Southbridge. Starting with Intel's 8xx chipsets, Northbridge and Southbridge were changed to Memory Controller and I/O Controller
Northbridge Connects CPU to:
RAM
AGP bus
PCI Express bus
Built-in display Adapter
Southbridge Connects CPU to:
ATA (IDE) Drives
USB bus
FireWire bus
Serial port
Parallel port
Built-in audio
ISA bus (earlier PCs)
http://common.ziffdavisinternet.com/encyclopedia_images/NORTBRID.GIF
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