ADLINK cPCI-6625 - Manual (Page 60)

48 BIOS Setup Utility
7.3.2 ACPI Settings
ACPI OS Shutdown Mode
ATX: OS will turn off system power when shut down. AT: OS
shows “It is now safe to turn off your computer.” Note: AT mode
does not support S3 & S4. Set this value to ATX/ AT.
ACPI Sleep State
Select the highest ACPI sleep state the system will enter, when
the Suspend button is pressed. Options: S1(CPU Stop Clock),
Suspend Disable.
Z S1(CPU Stop Clock): Power On Suspend - Under this
setting the CPU is not executing instructions, all power
resources that supply system level reference of S0 are
off, system memory context is maintained, devices that
reference power resources that are on, and devices that
can wake-up the system can cause the CPU to continue
to execute from where it left off.