Chapter 1: Overview 1-33
ACPI Sleep States (S0 – S5)
Under
the
G1
sleeping
state
ACPI
defines
levels
of
system
sleep
state
support.
The
7403
supports
the
following
sleeping
states:
•
S0:
Normal
Powered
‐
On
state
•
S1
(Standby):
The
S1
sleeping
state
is
a
low
wake
latency
sleeping
state.
In
this
state,
no
system
context
is
lost
(CPU
or
chip
set)
and
hardware
maintains
all
system
contexts.
Note:
The
7403
does
not
support
S1
state.
Turning
off
the
backlight
and
hard
drives
provides
the
equivalent
power
savings
(due
to
Intel’s
processor
C
‐
states
feature)
at
nearly
zero
latency.
•
S3
(Suspend
to
Ram):
The
S3
sleeping
state
is
a
low
wake
latency
sleeping
state.
This
state
is
similar
to
the
S1
sleeping
state
except
that
the
CPU
and
system
cache
context
is
lost
(the
OS
is
responsible
for
maintaining
the
caches
and
CPU
context).
Control
starts
from
the
processor’s
reset
vector
after
the
wake
event.
In
NCR
systems,
during
S3,
power
is
only
provided
to
the
on
‐
board
USB
ports.
Note:
When
the
terminal
resumes
from
an
S3
state,
all
the
USB
devices
re
‐
enumerate.
This
causes
speaker
tones
as
if
they
were
disconnected
and
then
reconnected.
This
does
not
present
a
problem
and
the
USB
devices
will
continue
to
operate
correctly.
Requirements
for
S3
support:
–
O/S
must
be
built
on
a
system
with
S3
enabled
in
the
BIOS
–
Some
peripherals
may
not
be
S3
capable,
which
can
prevent
the
system
from
entering
S3
state.
–
Currently,
it
is
not
recommended
to
use
S3
on
systems
that
are
configured
with
a
Celeron
575
CPU
if
Intel
®
Active
Management
Technology
(AMT)
is
enabled.
System
lock
ups
can
occur
in
this
configuration.
•
S4
(Suspend
to
Disk):
The
S4
state
is
the
lowest
power,
longest
wake
latency
sleeping
state
supported
by
ACPI.
In
order
to
reduce
power
to
a
minimum,
it
is
assumed
that
the
hardware
platform
has
powered
off
all
devices.
Platform
context
is
maintained.
Requirements
for
S4
support:
–
O/S
must
be
built
on
a
system
with
S3
enabled
in
the
BIOS
–
Some
peripherals
may
not
be
S4
capable,
which
can
prevent
the
system
from
entering
S4
state.
Reference
the
ACPI
Specification
for
details.
Summary of Contents for RealPOS 70XRT
Page 1: ...NCR RealPOS 70XRT 7403 POS Workstation Release 1 2 User Guide B005 0000 1872 Issue E ...
Page 80: ...4 6 Chapter 4 Installing a Secondary Dual Display ...
Page 124: ...7 10 Chapter 7 Installing a RAID System ...
Page 129: ...Chapter 8 2x20 Customer Display Interface 8 5 CP437 ...
Page 130: ...8 6 Chapter 8 2x20 Customer Display Interface CP858 ...
Page 131: ...Chapter 8 2x20 Customer Display Interface 8 7 CP866 ...
Page 132: ...8 8 Chapter 8 2x20 Customer Display Interface CP932 ...
Page 134: ...9 2 Chapter 9 Cash Drawer Interface ...
Page 142: ...10 8 Chapter 10 Wedge to USB MSR Software Migration ...
Page 146: ...11 4 Chapter 11 Diagnostic LEDs ...
Page 161: ......
Page 162: ......
Page 172: ...15 10 Chapter 15 BIOS Settings ...
Page 178: ...16 6 Chapter 16 Converting the MSR to MagTek Emulation Mode ...
Page 180: ...A 2 Appendix A Memory Map ...
Page 182: ...B 2 Appendix B IRQ Settings ...