EVOC EC7-1813CLD2NA SERIES, Руководство пользователя

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Chapter 3 BIOS Setup
EC7­1813CLD2NA SERIES ­ 43 ­
System Resource Managed by BIOS under X86 Platform
We define three kinds of system resources here: I/O port address, IRQ interrupt
number and DMA number.
u
DMA
Level Function
DMA0 DRAM Refresh
DMA1 Unassigned
DMA2 Unassigned
DMA3 Unassigned (sometimes used for hard disk)
DMA4 Used for DMAC Cascade
DMA5 Unassigned
DMA6 Unassigned
DMA7 Unassigned
u
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
PCI­X. However, relevant OS are required to enable that function, and currently, only
the OS above Windows 2000 could support that function.
u
IO Port Address
There is 64K for the system I/O address space. Each peripheral will occupy portion of
the space. The table below shows parts of the distribution of the I/O address. As the
address of PCI device (e.g. PCI network card) is configured by software, it is not
listed in this table.