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Chapter 4
BIOS Configuration
be read by the system through the 8-bit X-bus. Shadowing improves the
performance of the system BIOS and similar ROM firmware for expansion
peripherals, but it also reduces the amount of high memory (640 KB to 1 MB)
available for loading device drivers, etc.
Enable shadowing into each section of memory separately. Many system
designers hardwire shadowing of the system BIOS and eliminate a System
BIOS Shadow option.
Video BIOS shadows into memory area C0000-C7FFF. The remaining areas
shown on the BIOS Features Setup screen may be occupied by other expan-
sion card firmware. If an expansion peripheral in your system contains ROM-
based firmware, you need to know the address range the ROM occupies to
shadow it into the correct area of RAM.
Chipset Features Setup
This section describes features of the Intel 440EX chipset.
Advanced Options
The parameters in this screen are for system designers, service personnel, and
technically competent users only. Do not reset these values unless you
understand the consequences of your changes. Note: This chapter describes
all fields offered by Award Software in this screen. Your system board designer
may omit or modify some fields.
NOTE: The diagram on the following page may not be an exact representa-
tion due to differences in BIOS versions.
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