System Board 4-9

System Board Components

Component Function
Winbond Super I/O W83627HF-
AW contro ller The controller supports the following:
Industry-standard floppy controller
Multimode parallel port
Centronics compatible (standard mode)
Enhanced capabilities port (ECP)
Enhanced parallel port (EPP)
Two RS-232C serial ports
Two USB ports
Integrated PS/2 keyboard and mouse controller
One MIDI/Game port
Hardware monitor
Yamaha Sound YMF 752-S Audio integrated on system board, compatible with
Windows Sound System
Processor and Secondary Cache
The system uses a Pentium III processor with an internal clock speed of 533 MHz or higher
(depending on type of processor).
The processors are advanced pipelined 32-bit addressing, 64-bit data processors designed to
optimize multitasking operating systems. The 64-bit registers and data paths support 64-bit
addresses and data types.
To use the processor’s power, the system features an optimized 64-bit memory interface and
256 KB of secondary write-back cache on the processor.
The processor is compatible with 8-, 16-, 32-, and 64-bit software written for the Intel386™,
Intel486™, Pentium, Pentium II, and Pentium III processors. The processor is installed in a
Socket 370 on the system board.
System BIOS
The PCI-compatible BIOS is contained in a 4-Mb flash memory device on the system board.
The BIOS provides Power-On Self-Test (POST), system Setup program, PCI auto-configuration
utility, and BIOS recovery code.
The FLASH ROM allows fast, economical BIOS upgrades. The FLASH ROM is a
reprogrammable EPROM containing both the system and video BIOS. Using the FLASH ROM
to change the ROM BIOS provides the following advantages:
! BIOS upgrade is performed quickly and easily
! expense of replacing ROM BIOS chips is eliminated, so system maintenance costs are
reduced
! less chance of inadvertently damaging the system board than when physically replacing
ROMs
! network administrators can exercise company-wide control of BIOS revisions.
The BIOS programs execute the Power-On Self-Test (POST), initialize processor controllers,
and interact with the display, diskette drive, hard drives, communication devices, and
peripherals. The system BIOS also contains the Setup Utility.