Bios Upgrades - NCR 7454 Hardware User's Manual

1-20 Chapter 1: Product Overview
FLASH memory Implementation
The Intel E28F800B5‐T70 Flash component is organized onboard as
1024 K x 8 (1 MB). While a typical PC BIOS image including video and
LAN boot ROM code normally fits in 256 K on the Pentium Board and
512 K in the Pentium III/Celeron board, the boards support a 1 MB
flash ROM. The current Phoenix BIOS release only requires 256 K of
this 1 MB total. The Flash device contains the PC System BIOS along
with the Video BIOS and LAN boot ROM which compresses the ROM
images into a single binary image.
The Flash device is divided into four areas, as described below.
System Address
F0000H FFFFFH 64 K Main BIOS
EE000H EFFFFH 8 K System BIOS Reserved during boot
ED000H EDFFFH 4 K Plug and Play ESCD Storage Area
E0000H ECFFFH 52 K System/VGA BIOS Reserved during boot

BIOS Upgrades

Flash memory makes distributing BIOS upgrades easy. A new version
of the BIOS can be installed from the hard disk, network or through a
serial port.
The disk‐based Flash upgrade utility, PHLASH.EXE, ensures the
upgrade BIOS extension matches the target system to prevent
accidentally installing a BIOS for a different type of system.
Setup Utility
The ROM‐based Setup utility permits the system configuration to be
modified without opening the system for most basic changes. The
Setup utility is accessible only during the Power‐On Self Test (POST)
by pressing the <F2> key after the POST memory test has begun and
before boot begins. A prompt may be enabled that informs users to
press the <F2> key to access Setup.
FLASH Memory Area