EVOC 104-1814CLDNA Series, User Manual

Page: 84 / 93

Chapter 3 BIOS Setup
­ 34 ­ 104­1814CLDNA Series
System Resources 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
Floppy Disk
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 of motherboards above P4 level
support APIC and provide more than 16 interrupt sources such as IRQ16 ­ IRQ23
while some others support up to 28 interrupt sources such as which supports PCI­X.
However, the related OS is required in order to enable that function and only the OS
above Windows 2000 could support that function currently.
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.