Technical Reference Guide

Chapter 7

BIOS ROM

7.Chapter 8 BIOS ROM

7.1INTRODUCTION

The Basic Input/Output System (BIOS) of the computer is a collection of machine language programs stored as firmware in read-only memory (ROM). The BIOS ROM includes such functions as Power-On Self Test (POST), PCI device initialization, Plug ‘n Play support, power management activities, and the Setup utility. The firmware contained in the BIOS ROM supports the following operating systems and specifications:

DOS 6.2

Windows 3.1 (and Windows for Workgroups 3.11)

Windows 95, 98SE, 2000, XP Professional, and XP Home

Windows NT 4.0 (SP6 required for PnP support)

OS/2 ver 2.1 and OS/2 Warp

SCO Unix

DMI 2.1

Intel Wired for Management (WfM) ver. 2.2

Alert-On-LAN (AOL) and Wake-On-LAN (WOL)

ACPI and OnNow

APM 1.2

SMBIOS 2.3.1

PC98/99/00 and NetPC

Boot Integrity Services (BIS)

Intel PXE boot ROM for the integrated LAN controller

BIOS Boot Specification 1.01

Enhanced Disk Drive Specification 3.0

“El Torito” Bootable CD-ROM Format Specification 1.0

ATAPI Removeable Media Device BIOS Specification 1.0

The BIOS ROM is a 512KB Intel Firmware Hub (or Firmware Hub-compatible) part. The runtime portion of the BIOS resides in a 128KB block from E0000h to FFFFFh.

This chapter includes the following topics:

ROM flashing (7.2)

page 7-2

Boot functions (7.3)

page 7-4

Setup utility (7.4)

page 7-6

♦ Client management functions (7.5)

page 7-13

PnP support (7.6)

page 7-15

♦ Power management functions (7.7)

page 7-17

♦ USB legacy support (7.8)

page 7-24

Compaq Evo and Workstation Personal Computers 7-1

Featuring the Intel Pentium 4 Processor

Second Edition - January 2003

Page 138
Image 138
Compaq W4000 manual Bios ROM