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Chapter 2 System Board 2-1
Chapter 2 System Board
This high-performance system board supports the Intel Pentium II
CPU running at speeds ranging from 233 to 400 MHz. Integrated with
the Intel 440BX system controller, which consists of the PCI/AGP
controller and the PCI/ISA IDE accelerator (PIIX4), this system board
combines the new generation of Pentium II power with unmatched
graphics performance.
The PCI/AGP controller host bus interface supports a Pentium II
processor with 66 or 100 MHz bus frequency. It also provides a 72-bit
DRAM that supports synchronous DRAM (SDRAM) DIMMs. The
PCI/AGP controller features an Accelerated Graphics Port (AGP)
interface. Supporting up to 133 MHz data transfer speed, the AGP
interface boosts graphics performance.
The PIIX4 is a multifunction PCI device controller implementing
system functions including PCI IDE, universal serial bus (USB)
host/hub, and enhanced power management. It also supports Ultra
DMA/33 synchronous DMA-compatible devices.
The system board utilizes both the ISA and the PCI local bus
architecture. Two ISA, five PCI bus slots (including one PCI/ISA
shared slot), and one AGP slot reside on the board to allow installation
of either master or slave devices.
Three memory banks composed of 168-pin dual inline memory
module (DIMM) sockets support a maximum system memory of
384 MB using 128-MB DIMMs. The sockets only support SDRAM-
type DIMM.
It also supports two USB (Universal Serial Bus) connectors, and other
standard features such as two UART NS16C550 serial ports, one
enhanced parallel port with an Enhanced Parallel Port (EPP)/Extended
Capabilities Port (ECP) feature, a diskette drive interface, and two
embedded hard disk interfaces.