ACPI
ACPI is a function of the hardware and the BIOS. Most Pentium II motherboards do have ACPI, but you cannot add ACPI to a system that does not. If you cannot get ACPI to work, check to see if it is enabled in the BIOS.
ACPI Function
ACPI S3 mode
Green Star is a corporation. ACPI is a standard.
"Sleeping" is a feature of the computer BIOS. If Windows XP does not provide an option to "Sleep", make sure that ACPI is enabled in your BIOS.
ACPI is the successor APMOperating System
With ACPI the operating system controls power management.
APM (Advanced Power Management).
ACPI stands for Advanced Configuration and Power Interface. ACPI provides a standard for configuring devices and managing power for the operating system.
ACPI was initally developed by Intel, Microsoft, and Toshiba. Current developers of ACPI include Phoenix, Dell, and Hewlett-Packard.
An ACPI processor helps the computer recognized motherboard, hardware and drivers. It just replaces the old AMP standard.