Chapter 1: Introduction 1-2 Chipset Overview The ServerWorks ServerSet TM III LE is a high-performance core logic chipset that consists of a North Bridge and a South Bridge. Introduction The North Bridge includes an integrated main memory subsystem and a dual channel PCI bus that bridges the processor bus to a 64-bit PCI bus and a 32-bit PCI bus. The North Bridge also packs and unpacks data for PCI accesses, which reserves more processor bandwidth for multiprocessor motherboards.
The South Bridge provides various integrated functions, including the PCI to ISA bridge and support for UDMA33, security (passwords and system pro- tection), Plug & Play, USBs, power management, interrupt controllers and the SMBus. The North and South Bridges communicate over a serial bus that uses the PCI clock as a timing reference. This serial bus uses a single pin on both bridges to send a 4-bit word for transmitting commands back and forth. 1-3 Special Features ATI Graphics Controller The P3TDLR has an integrated ATI video controller based on the Rage XL graphics chip. The Rage XL fully supports sideband addressing and AGP texturing.
An 8 MB graphics memory chip has been integrated aboard the P3TDLR to provide graphics memory. This onboard graphics package can provide a bandwidth of up to 512 MB/sec over a 32-bit graphics memory bus. BIOS Recovery The BIOS Recovery function allows you to use an image file to recover your BIOS if the BIOS flashing procedure fails (see Section 3-3). Recovery from AC Power Loss BIOS provides a setting for you to determine how the system will respond when AC power is lost and then restored to the system. You can choose for the system to remain powered off (in which case you must press the 1-9