Windows Power Management Application

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Windows is a popular computer operating system, which is widely used in office and home computers. This article introduces the features and usage of Windows 98 and Windows 2000 power management.

1. Setting and using ACPI

　　ACPI is Advanced Configuration and Power Interface, which is a power management standard jointly developed by Intel, Microsoft and other five companies. The latest version is 2.0.
　　At present, there are two main power management modes used on PCs, one is ACPI and the other is APM (Advanced Power Management). ACPI is a more advanced power management mode than APM, which specifically defines a function called STR. STR stands for Suspend to RAM. In the past, we all used STD (Suspend to Disk). STD is to store all the working states before the system is suspended in the hard disk when the system is in a suspended state. In this way, when waking up, it is necessary to first read the working state information before the suspension stored in the hard disk from the hard disk. Due to the speed of hard disk reading, the wake-up time becomes very slow. STR, on the other hand, stores the working status data before suspension in the memory, so that the speed when waking up will be doubled. Using ACPI mode can save more power. For some overclocking users, the temperature of the CPU in Suspense to RAM mode will be lower, about 4-5 degrees lower than that in APM mode.
　　The following introduces the setting method of ACPI. ACPI needs software and hardware support.
　　The first is hardware setting. Motherboard setting: Enter BIOS, find Power Management Setup, double-click to enter the function, click ACPI Function or ACPI Suspend Type and other related options, and set it to Enabled mode. Note: Not all the option names on the motherboard are the same as in this article, and you must refer to their manuals. Generally speaking, most BX motherboards support ACPI. In addition, peripherals such as display cards should also support ACPI.
　　Let's talk about software settings. There are three ways to choose software settings, which should be set according to specific circumstances.
　　The first way: Set when installing the operating system. Windows 98 cannot automatically recognize the installation, so you must type: setup /pj during installation to force the operating system to automatically install ACPI. Windows 2000 can automatically recognize during installation.
　　The second method: If the operating system that has been installed is Windows 98, you can edit the registry, run Regedit, find the item "HKEY_LOCAL_MACHINE\ Software\Microsoft\Windows\Current Version\Detect", create a new "string" named "ACPI Option", and then give it a value, set the value to "1", that is, to start the ACPI mode, and then end the editing of the registry. Then execute the "Add New Hardware" function in the "Control Panel". At this time, the system will detect the new hardware and automatically install the ACPI device. After completion, restart the computer to complete the activation of the STR function. Recommendation: Export a copy of the registry as a backup first. If the registry modification error causes the system to be unable to enter the Windows screen, you can first enter the "Safe Mode" and import the previously exported registry to restore it.
　　The third method is easier to implement: go to "Control Panel" → "System" → "Device Manager" → "System Devices", find "Plug and Play BIOS", double-click it, enter the properties, click the "Driver" tab, select "Upgrade Driver" → "Show a list of all drivers in the specified location..." → "Show All Hardware" → select "ACPI System Button" to install the new driver. After the installation is complete, restart the computer and it's done. After
　　the setting, when you press the power button on the chassis, Windows will automatically suspend and shut down (here it means safe shutdown, not the kind of sudden power outage), instead of using "Start" → "Shutdown System" → "Shutdown Computer" as before, and you must wait until "It is safe to shut down now" before pressing the power button to shut down.

2. Windows "Hibernation"

　　"Hibernation" was originally a function of Notebook. When the computer battery is low, it forces all the data in the memory to be written to an image file on the hard disk and shuts down. The next time you start the computer, you don't have to go through the startup process, but directly read the hard disk image back to the memory. Everything is the same as when you shut down last time, and the corresponding program is still running. The setting method is to go to the control panel/power management, check the "enable hibernation support" in the "hibernation" tab, and then confirm. Then select the "advanced" tab, and select the action the system will perform when the power button is pressed. When you turn on the hibernation function, "hibernation" will be added to the "what to do after pressing the chassis power button" option. When
　　the machine is set to "hibernate when the switch is pressed". So when shutting down, you no longer have to be busy clicking "start" → "shut down system" → "turn off computer". If you are an NT user, you will definitely experience that NT takes a long time to shut down, and you can't turn off the power by yourself, you must wait until it is completely shut down. Now you can just press the chassis power switch, and the system will take about 15 seconds to write the memory to the hard disk (the premise is that the hard disk must have a space as large as the memory).
　　"Hibernation" and "suspend" are two different concepts. When "suspending", power supply is still required to ensure that the data in the memory is not lost. If there is a power outage at this time, it is equivalent to an abnormal shutdown. "Hibernation" is a complete power outage after writing to the hard disk, just like a normal shutdown.

3. Windows 2000 can monitor UPS status

　　Windows 2000 has added the function of providing UPS status monitoring. When a UPS is installed in the computer, Windows 2000 can display the current status of the UPS.

4. Conclusion

　　Reasonable use of the power management system plays a certain role in making the computer run reliably and stably, thus achieving the best state.