By David Ott
Part 1: Power Management Basics
Because of the need to integrate hardware features with software management, today’s computer system power management framework is defined by an open industry specification known as ACPI. ACPI, or the Advanced Configuration and Power Interface specification[1], is an operating system-based scheme for managing system power features and is intended to replace the familiar BIOS-based scheme known as APM (Advanced Power Management).
ACPI is a comprehensive solution that discusses both hardware and software aspects of computer system power management, and how they should interact with one another. You can find the 4.0a specification at:
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