A Brief Analysis of Power Management in Windows 2000

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A Brief Analysis of Power Management in Windows 2000 [Copy link]

Windows 2000 (including Microsoft Windows 2000 Professional, Microsoft Windows 2000 Server, and Microsoft Windows 2000 Advanced Server) is a new generation of operating system (OS) based on the NT core. Win2000 is favored by everyone for its reliable and stable performance and powerful network functions. More and more friends are installing Win2000, so it is necessary for us to have a deep understanding of Win2000. Win2000 has powerful functions and high hardware requirements, and it is easy to have hardware compatibility problems. Among them, the compatibility problems we encounter are often related to power management: for example, machines with earlier BOIS versions cannot install Win2000, some machines freeze when starting hibernation even if Win2000 is installed, the CPU fan inexplicably does not rotate, and the machine cannot be shut down automatically and needs to be shut down manually, etc. Let us reveal the secrets of Win2000 power management.

　　Windows 2000 has adopted many new technologies to be more stable and reliable. In terms of power management, it supports two power management modes: Advanced Power Management (APM) and Advanced Configuration and Power Interface (ACPI). Advanced Power Management ( APM) consists of one or more software layers that support power management of manageable power hardware in a computer. APM defines a software interface that is independent of hardware. This independence refers to the independence between hardware-specific power management software and the operating system power management policy driver. It does not focus on the details of the hardware, so that higher-level software can use APM without understanding any hardware interface. The Advanced Configuration and Power Interface (ACPI) is an open industrial specification that defines a flexible and expandable hardware interface for the motherboard. Software designers use this specification to integrate power management functions into the entire computer system, including hardware, operating system, and programs. This integration allows Win2000 to determine which program is active and handle all power management resources for computer subsystems and peripherals. Therefore, the computer motherboard BIOS version that installs and runs Win2000 should support ACPI, or some computers with BIOS versions based on APM and plug-and-play design.

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