User`s manual

This setting is to set the Num Lock status when the system is powered on. Setting to [On] will turn on the

Num Lock key when the system is powered on. Setting to [Off] will allow users to use the arrow keys on the

numeric keypad.

• IOAPIC Function

This field is used to enable or disable the APIC (Advanced Programmable Interrupt Controller). Due to

compliance with PC2001 design guide, the system is able to run in APIC mode. Enabling APIC mode will

expand available IRQ resources for the system.

• MPS Table Version

This field allows you to select which MPS (Multi-Processor Specification) version to be used for the

operating system. You need to select the MPS version supported by your operating system. To find out

which version to use, consult the vendor of your operating system.

• CPU Feature

Press <Enter> to enter the sub-menu and the following screen appears:

• Execute Bit Support

Intel’s Execute Bit Support functionality can prevent certain classes of malicious “buffer overflow”

attacks when combined with a supporting operating system. This functionality allows the processor to

classify areas in memory by where application code can execute and where it cannot. When a

malicious worm attempts to insert code in the buffer, the processor disables code execution,

preventing damage or worm propagation.

• Set Limit CPUID MaxVal to 3

The Max CPUID Value Limit is designed to limit the listed speed of the processor to older operating

systems.