Tyan Computer B5102, GX21 manual APIC Mode, MPS Version Control For OS, Enabled / Disabled

APIC Mode

This option allows you to enable or disable Advanced Pro- grammable Interrupt Controller (APIC) Mode. APIC mode provides multi-processor interrupt management and incorpo- rates both static and dynamic symmetric interrupt distribution across all processors. In systems with multiple I/O sub- systems, each subsystem can have its own set of interrupts. Each interrupt pin is individually programmable as either edge or level triggered. The interrupt vector and interrupt steering information can be specified per interrupt. An indirect register accessing scheme optimizes the memory space needed to access the I/O APIC's internal registers. To increase system flexibility when assigning memory space usage, the I/O APIC's two-register memory space is re-locat- able. The choices are:

Enabled / Disabled

Note: Once the operating system is installed, such as Windows XP, this setting cannot be changed without reinstalling the operating system, regardless of whether the initial setting is Disabled or Enabled.

MPS Version Control For OS

This feature is only applicable to multiprocessor mother- boards as it specifies the version of the Multi-Processor Specification (MPS) that the motherboard will use. The MPS is a specification by which PC manufacturers design and build Intel architecture systems with two or more processors.

MPS 1.1 was the original specification. MPS version 1.4 adds extended configuration tables for improved support of multi- ple PCI bus configurations and greater expandability in the future. In addition, MPS 1.4 introduces support for a second- ary PCI bus without requiring a PCI bridge.

Select the APIC mode depending on the operating system installed: select 1.1 for Win NT 3.52, and 1.4 for Win NT4.0, Win2000 and WinXP etc. The choices are:

1.4/ 1.1

Note: This option cannot be changed if the

APIC Mode is set to Disabled.

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