Advanced Power Management v. 1.2
The APM 1.2 specification defines the APM software interface.
Important: The power management interface that is strongly recommended for Microsoft Windows operating systems is defined in the Advanced Configuration and Power Interface Specfication, which is available from the ACPI web site 
. The information on this page is considered archival information, describing the power management guidelines that applied for earlier versions of Windows.
Advanced Power Management BIOS Interface Specification Revision 1.2 (Download: 1.4 MB RTF file, published: February 1996)
This specification defines the APM software interface, with information about how to implement an APM BIOS or APM driver. This revised specification was published by Intel Corporation and Microsoft Corporation.
Changes in APM v.1.2(Download: 1.3 MB RTF file, published: February 1996)
This document provides the APM v.1.2 specifications with change bars to show additions, clarifications, and deletions from version 1.1.
Summary of Industry Feedback on APM 1.2 Specification(Download: 20K RTF file, published: February 1996)
This document summarizes and responds to feedback received from industry reviews of APM v.1.2,and provides answers to frequently asked questions about this revised specification.
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