EVOC EPE-1814V2NAR, Руководство пользователя

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Chapter 3 BIOS Setup
EPE­1814V2NAR ­ 37 ­
The System Resource Managed by BIOS under x86 Platform
We define three types of system resources here: I/O port addresses, IRQ number and
DMA number.
u
DMA
Level Function
DMA0 DRAM Refresh
DMA1 Not Assigned
DMA2 Floppy Disk
DMA3 Not Assigned (sometimes used for hard disk)
DMA4 Used for the cascade of DMAC
DMA5 Not Assigned
DMA6 Not Assigned
DMA7 Not Assigned
u
APIC
Advanced programmable interrupt controller. Most motherboards above P4 level
support APIC and provide more than 16 interrupt sources, like IRQ16 ­ IRQ23;
some others can have up to 28 interrupt sources such has 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 external device 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.