EVOC EC0-1816 Series, User Manual

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BIOS Setup
- 48 - EC0-1816(B) SERIES
 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
The option is used to select boot device.
3.4 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.
 IO Port Address
Only 16 IO address lines are designed for X86, from 0 ~ 0FFFFh; there is 64K for the
system I/O address space. In traditional ISA connector, only the foregoing 1024 (0000
~ 03FFh) are used while the ports above 0400h are used by PCI and EISA connectors.
Each peripheral will occupy portion of the space. The table below shows the I/O
connectors used in X86 platform.