4-8 System Board

— serial devices through two buffered 16C550 UART serial ports, supporting up to

115.2 KB per second

— two USB devices

— joystick through the MIDI/game p ort

— speaker and microphone connectors (line in, line out, microphone in).

The following table lists the major components on the system board.

System Board Components
Component Function
Pentium III Processor 667-MHz or higher processor , 133-MHz or higher FSB
Intel 820 Chipset:
82820 Memory Controller Hub
(MCH) Uses Intel graphics technology, software drivers, and
Direct AGP (integrated AGP) to create vivid 2D and 3D
effects and images. Features integrated Hardware Motion
Compensation to improve video quality.
Features processor and host bus optimized for the
processor, integrated RDRAM controller, 3D graphics
visual enhancements, 3D graphics texturing
enhancements, digital video output, integrated 24-bit
230 MHz RAMDAC, 2D graphics, arithmetic stretch blitter
video, integrated graphics memory controller, display
cache interface, arbitration scheme and concurrency, data
buffering, power management functions, and support for
I/O bridge.
82801AA I/O Controller Hub
(ICH) Uses Accelerated Hub Architecture to make direct
connection from graphics and memory to the integrated
AC97 controller, IDE controller, and dual USB ports.
Supports PCI bus interface, integrated IDE controller,
USB, AC’97 Link for audio and telephone Codecs,
interrupt controller, timers, 3.3V operation, power
management logic, enhanced DMA controller, real-time
clock, SM bus, and Firmware Hub.
82802 Firmware Hub (FWH) Stores system BIOS and video BIOS, eliminating a
redundant nonvolatile memory component. In addition, the
82802 contains a hardware Random Number Generator
(RNG). The Intel RNG provides truly random numbers to
enable fundamental security building blocks supporting
stronger encryption, digital signing, and security protocols.
Features Intel Platform Compatibility, Firmware Hub
Hardware Interface Mode, configurable interfaces, flash
memory for non-volatile storage, and address/address
multiplexed interface mode.