Technical Reference Guide

Chapter 8

SYSTEM BIOS

8.Chapter 8 SYSTEM BIOS

8.1INTRODUCTION

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 ROM includes such functions as Power-On Self Test (POST), VGA BIOS, PCI device initialization, Plug ‘n Play support, ACPI power management activities, and the Setup utility. The firmware contained in the BIOS ROM supports the following operating systems and specifications:

Windows 95, 98SE, 2000, XP Home, XP Professional, and Mandrake Linux 8.2

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

Wake-On-LAN (WOL)

ACPI and OnNow

SMBIOS 2.3.1

PC98/99/00 and NetPC

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 firmware is contained in a flash ROM component. The runtime portion of the BIOS resides in a 128KB block from E0000h to FFFFFh.

This chapter includes the following topics:

ROM flashing (8.2)

page 8-2

Boot functions (8.3)

page 8-3

Setup utility (8.4)

page 8-5

♦ Client management functions (8.5)

page 8-11

♦ Power management functions (8.6)

page 8-14

♦ USB legacy support (8.7)

page 8-16

Compaq D315 and hp d325 Personal Computers 8-1

Featuring the AMD Athlon XP Processor

Second Edition – April 2003

Page 135
Image 135
HP D315 manual System Bios