Compaq 850 manual Support Components, Chipset Comparison, Support Component Functions

Technical Reference Guide

2.4.2 CHIPSET

The chipset consists of a Memory Controller Hub (MCH), an I/O Controller Hub (ICH), and a FirmWare Hub (FWH). Table 2-2 lists the integrated functions provided by the two types of chipsets used in these systems.

Table 2-2.Chipset Comparison

		Table 2-2.
		Chipset Comparison
Chipset	Component	Function
850	82850 MCH	AGP 4X interface
		Dual-channel RDRAM controller supporting up to 4 PC800 RIMMs
		400-MHz FSB
	82801BA ICH2	PCI bus I/F
		LPC bus I/F
		SMBus I/F
		IDE I/F with UATA/100 support
		AC ’97 controller
		RTC/CMOS
		IRQ controller
		Power management logic
		USB I/F (4)
		8259 and I/O APIC interrupt processing
	82802 FWH	Loaded with Compaq BIOS

2.4.3 SUPPORT COMPONENTS

Input/output functions not provided by the chipset are handled by other support components. Table 2-3 shows the functions provided by the support components.

Table 2-3.Support Component Functions

	Table 2-3.
	Support Component Functions
Component Name	Function
LPC47B357 7 I/O Controller	Keyboard and pointing device I/F
	Diskette I/F
	Serial I/F (COM1and COM2)
	Parallel I/F (LPT1, LPT2, or LPT3)
	AGP, PCI reset generation
	ISA serial IRQ converter
	Power button and LED control logic
	GPIO ports
ES1373	PCI audio controller
CS4297A Audio Codec	Audio mixer
	Digital-to-analog converter
	Analog-to-digital converter
	Analog I/O

Compaq Deskpro EXS and Workstation 300 Personal Computers 2-11

Featuring the Intel Pentium 4 Processor

First Edition - December 2000