Features plc cpu modules in each module on the computer motherboard

DMA channel containing the chipset controller, 8-channel control and data  cpu module management DQR0 ~ DQR7's. DMA channels currently used to exchange data with the computer equipment directly to a floppy disk, Ultra DMA hard drives, SCSI hard drives and optical drives and other external devices IDE interface
Real-time clock and CMOS RAM timer
The system provides real-time clock timer date and time when the system is industrial automation plc  shut down, the date and time stored in the CMOS RAM, when powered by a battery, and continue to go.
  With the current integration of development, most are integrated into the chipset Northbridge and Southbridge chips. Northbridge chip on the motherboard is a chip from the CPU recently, in charge of the L2 or L3 Cache, memory interface, CPU Interface, AGP graphics interface and high-speed ECC error correction. Southbridge responsible for KBC (keyboard controller), RTC (real time clock controller), PCI, ISA, USB, Ultra DMA/33 (66) EIDE data transmission and ACPI (Advanced Energy Management) and so on. Northbridge which plays a leading role, also known as the main bridge.
 In recent years, AMD and INTER are integrated in the CPU memory controller, a large plc analog io module  part of the motherboard, most motherboards including h61 later canceled the Northbridge, Northbridge functions will be integrated into the CPU. Northbridge may later we rarely see it.