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18 ISP2150 2U Rack Server Platform Product Guide
Keyboard and Mouse
The keyboard/mouse controller is PS/2-compatible. The server may be locked automatically if
there is no keyboard or mouse activity for a predefined length of time, if specified through the
System Setup Utility (SSU). Once the inactivity (lockout) timer has expired, the keyboard and
mouse do not respond until the previously stored password is entered.
ACPI
The ISP2150 supports the Advanced Configuration and Power Interface (ACPI) as defined by the
ACPI 1.0 and PC97 specifications. An ACPI aware operating system can put the system into a
state where the hard drives spin down, the system fans stop, and all processing is halted. However,
the power supply will still be on and the processors will still be dissipating some power, so the
power supply fan and processor fans will still run.
The ISP2150 supports sleep states s0, s1, s4, and s5. With future versions of
Microsoft
Windows
†
9X that support ACPI, the BIOS will only support sleep states s0, s1, and s5.
With future versions of Microsoft Windows NT
†
x that support ACPI, the BIOS will support sleep
states s0, s1, s4, and s5.
• s0: Normal running state.
• s1: Processor sleep state. No context will be lost in this state and the processor caches will
maintain coherency.
• s4: Hibernate or Save to Disk: The memory and machine state are saved to disk. Pressing the
power button or other wakeup event will restore the system state from the disk and resume
normal operation. This assumes that no hardware changes have been made to the system while
it was off.
• s5: Soft off: Only the RTC section of the PIIX4 and the BMC are running in this state.
CAUTION
The system is off only when the AC power is disconnected.
Server Management
Server Management features are implemented using one microcontroller.
Baseboard Management Controller (BMC)
All server management functionality is concentrated in the BMC. The BMC and associated
circuitry are powered from + 5V_Standby, which remains active when server power is switched off
and the server is still plugged into AC power.