Chapter 1: Product Overview 1-19
The Flash device is divided into four areas, as described below.
System Address FLASH Memory Area
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 allows 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.
Note: An external alphanumeric keyboard is recommended for
running the BIOS CMOS Setup Utility. Otherwise, a Touch Screen can
be used.
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