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Security menu – NEC MH4500 User Manual

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3-10 Configuring Your System

Advanced Chipset Control Submenu

Feature

Choice

Description

Your Setting

Address Bit Permuting

Disabled
Enabled

To be enabled, there must be a
power of 2 number of rows, all rows
must be the same size, and all
populated rows must be adjacent
and start at row 0. Two-way or four-
way permuting is set automatically
based on memory configuration.

Base RAM Step

1 MB
1 KB
Every location

Tests base memory once per MB,
once per KB, or every location.

Extended RAM Step

1 MB
1 KB
Every location

Tests extended memory once per
MB, once per KB, or every location.

L2 Cache

Enabled
Disabled

When enabled, secondary cache is
sized and enabled. For Core Clock
Frequency-to-System Bus ratios
equal to two, BIOS automatically
disables the L2 cache.

ISA Expansion Aliasing

Enabled
Disabled

When enabled, every I/O access
with an address in the range
x100-x3FFh, x500-x7FFh,
x900-xBFF, and xD00-xFFFh is
internally aliased to the range
0100-03FFh before any other
address range checking is
performed.

Memory Scrubbing

Disabled
Enabled

When enabled, BIOS automatically
detects and corrects SBEs.

Read Prefetch for
PXBOA

16
32
64

Configures the number of Dwords
that are prefetched on Memory
Read Multiple commands.

Read Prefetch for
PBXOB

16
32
64

Configures the number of Dwords
that are prefetched on Memory
Read Multiple commands.

Security Menu

The following table lists the settings for the Security Menu.

Note:

Enabling the Administrator Password field

requires a password for entering Setup. The passwords are
not case sensitive.

Security Menu

Feature

Choice

Description

Your Setting

User Password is

Clear

Status only; user cannot modify.
Once set, this can be disabled by