User manual

Chapter 3 BIOS Setup
EC0-1815V2NAR - 41 -
 Save Changes and Reset
The option is used to save changes and reset.
 Discard Changes and Reset
The option is used to discard changes and reset.
 Boot Override
This option is used to select the boot device.
System Resource Managed by UEFI under X86 Platform
We define three kinds of system resources here: I/O port address, IRQ interrupt
number and DMA number.
 DMA
Level Function
DMA0 Unassigned
DMA1 Unassigned
DMA2 Unassigned
DMA3 Unassigned
DMA4 Used for DMAC cascade
DMA5 Unassigned
DMA6 Unassigned
DMA7 Unassigned
 APIC
Advanced programmable interrupt controller. Most motherboards above P4 level
support APIC and provide more than 16 interrupt sources, like IRQ16 - IRQ23; while
some others can have up to 28 interrupt sources, such as motherboard supporting
PCI-X. However, relevant OS are required to enable that function.