MSI MS-91C2 Series - Manual (Page 39)

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BIOS Setup
Advanced ACPI Configuration
ACPI Version Features
This setting allows you to select the ACPI version.
ACPI APIC Support
This BIOS feature is used to enable or disable the motherboard's APIC (Advanced
Programmable Interrupt Controller). The APIC provides multiprocessor support,
more IRQs and faster interrupt handling.
AMI OEMB Table
OEMB table is used to pass Disabled POST data to the AML code during ACPI
O/S operations. This setting allows the ACPI Enabled BIOS to add a pointer to
an OEMB table in the Root System AmI OEMB table Description Table (RSDT).
Headless Mode
This feature allows operating without a keyboard, monitor or mouse. To run
in headless mode, both BIOS and operating system must support headless
operation. When enabled, the BIOS will update the FACP to indicate support
for headless operation. Operating systems that support headless operation
can proceed to boot in headless mode.
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