Maintenance and Service Guide

Non Volatile
Memory
Type
Amount
(Size)
Does this
memory
store
customer
data?
Does this
memory
retain data
when power
is removed?
What is the
purpose of
this
memory?
How is data
input into
this
memory?
How is this
memory
write
protected?
System BIOS 4 to 5 MBytes Yes Yes Store system
BIOS code and
PC
configuration
data.
System BIOS
code is
programmed at
the factory.
Code is
updated when
the system BIOS
is updated.
Configuration
data and
settings are
input using the
F10 setup utility
or a custom
utility.
A utility is
required for
writing data to
this memory
and is available
on the HP
website.
Writing data to
this ROM in an
inappropriate
manner can
render the PC
nonfunctional.
Intel
Management
Engine
Firmware
(present only in
models ending
in a ‘p’ or ‘w’
or with Intel
Centrino Pro
technology)
1.5 or 5
MBytes
Yes Yes Stores
Management
Engine Code,
Settings,
Provisioning
Data and iAMT
third party data
store.
Management
Engine Code is
programmed at
the factory.
Code is
updated via
Intel secure
firmware
update utility.
Unique
Provisioning
Data can be
entered at the
factory or by an
administrator
using the
Management
Engine (MEBx)
setup utility. The
third party data
store contents
can populated
by a remote
management
console or local
applications
registered by
an
administrator to
have access to
the space.
The Intel chipset
is configured to
enforce
hardware
protection to
block all direct
read/write
access to this
area. An Intel
utility is
required for
updating the
firmware. Only
firmware
updates
digitally signed
by Intel can be
applied using
this utility.
30 Chapter 7 Statement of Volatility