Server Board Family Datasheet

System BIOS Intel® S5000 Server Board Family Datasheet
Revision 1.3
Intel order number D38960-006
104
This product supports the Hardware Design Guide for Microsoft Windows 2000 Server, Version
3.0 enterprise requirements.
3.14.2 Advanced Configuration and Power Interface (ACPI)
The primary role of the ACPI BIOS is to supply the ACPI tables. POST creates the ACPI tables
and locates them in extended memory (above 1 MB). The location of these tables is conveyed
to the ACPI-aware operating system through a series of tables located throughout memory. The
format and location of these tables is documented in the publicly available ACPI specifications
(Advanced Configuration and Power Interface Specification, Revision 1.0b and Advanced
Configuration and Power Interface Specification, Revision 2.0).
The BIOS supports both ACPI 2.0 and 1.0b tables. To prevent conflicts with a non-ACPI-aware
operating system, the memory used for the ACPI tables is marked as “reserved” in INT 15h,
function E820h.
As described in the ACPI specifications, an ACPI-aware operating system generates an SMI to
request that the system be switched into ACPI mode. The BIOS responds by setting up all
system specific configurations required to support ACPI and issues the appropriate command to
the BMC to enable ACPI mode. The system automatically returns to legacy mode on hard reset
or power-on reset.
The ACPI specification requires the system to support at least one sleep state. The BIOS
supports S0, S1, S3, S4, and S5 states. S1 is considered a sleep state.
Note: S3 is only supported on the Intel
®
Workstation Board S5000XVN. See the server or
workstation Technical Product Specification that applies to your product for more information
about the supported sleep states.
This platform can wake from the S1 state using USB devices in addition to the sources
described in Section 3.16 below.
The wake sources are enabled by the ACPI operating systems with cooperation from the
drivers. The BIOS has no direct control over the wake sources when an ACPI operating system
is loaded. The role of the BIOS is limited to describing the wake sources to the operating
system and controlling secondary control / status bits via the differentiated system description
table (DSDT).
The S5 state is equivalent to operating system shutdown. No system context is saved when
going into S5.
3.15 Front Control Panel Support
The platform supports a power button, a reset button, and an NMI button on the control panel.
3.15.1 Power Button
The BIOS supports a front control panel power button. Pressing the power button initiates a
request that the BMC forwards to the ACPI power state machines in the chipset. It is monitored
by the BMC and does not directly control power on the power supply.