HP ProOne 490 G3 Maintenance And Service Manual page 101

Nonvolatile Amount (size)
memory type
System BIOS 4-megabytes to
5-megabytes
Intel 1.5-megabytes
Management or 5-megabytes
Engine Firmware
(present in only
specific ZBook
and EliteBook
models. For
more
information, go
to
http://www.hp.com/
support, and
select your
country. Select
Drivers &
Downloads, and
then follow
the on-screen
instructions.)
Does this Does this
memory store memory retain
customer data? data when
power is
removed?
Yes Yes
Yes Yes
What is How is data
the purpose of input into this
this memory? memory?
Stores system System BIOS
BIOS code and code is
computer programmed at
configuration the factory. Code
data. is updated when
the system BIOS
is updated.
Configuration
data and
settings are
input using
the Computer
Setup (BIOS) or a
custom utility.
Stores Management
Management Engine Code is
Engine Code, programmed at
Settings, the factory. Code
Provisioning is updated via
Data and iAMT Intel secure
third-party data firmware update
store. 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 be
populated by a
remote
management
console or local
applications that
have been
registered by an
administrator to
have access to
the space.
Nonvolatile memory
How is this
memory write-
protected?
NOTE: Writing
data to this ROM
in an
inappropriate
manner can
render
the computer
nonfunctional.
A utility is
required for
writing data to
this memory and
is available on
the HP website;
go to
http://www.hp.com/
support, and
select your
country. Select
Drivers &
Downloads, and
then follow
the on-screen
instructions.
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.
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