4-14 IBM Personal Computer User GuidePlug and Play operation systemWhen this setting is enabled, the processor serial number is accessible to systemand application software. By default, the setting is disabled. If you configure thisselection, the machine must be powered off and back on for the change to takeeffect.Processor ControlUse this option to set any features that are associated with your system professor.ISA Legacy ResourcesISA legacy resources (DMA, Interrupts, Memory) are resources that are used byISA adapters and legacy devices that are not Plug and Play adapters.Power Management SetupThe Power Management Setup allows you to configure your system to use the mosteffective method of saving energy, while operating in a manner consistent with yourown style of computer use.ACPI BIOS ModeUse this setting to enable or disable the Automatic Configuration and PowerInterface (ACPI). If your operating system supports ACPI BIOS Mode, it is allowedto control the power management features of your computer when ACPI BIOSMode is enabled.APMThis setting allows automatic power saving through monitoring of your computer’shardware.APM BIOS ModeEnable this setting to reduce power consumption during periods of hardwareinactivity.