Technical information

AWARD BIOS 4-15

INTA

INTD

PCI#1PCI#2PCI#3

INTA

INTD

INTC

INTB

INTC

INTB

INTBINTAINTD

INTC

INTCINTBINTA

PCI#4

INTA

INTB

INTC

INTD

Figure 4-7 The Combination of PCI INT# lines

Used MEM base addr and Used MEM Length : The default value is N/A.

The Used MEM base addr (CB00, CC00, D000, D400, D800, DC00) and

Used MEM Length (8K, 16K, 32K, 64K) support some specific ISA

Legacy cards with requested memory space below 1M address. Now with

these two functions, users can define where the used memory address is

located and its length of the legacy area corresponding. Based on these,

BIOS will skip the UMB area that is used by the legacy device to avoid

the memory space conflict. For example, if users select "D000"for"Used

MEM base addr" and "16K" for "Used MEM Length", that means the

address region D0000H-D3FFFH is occupied by ISA legacy cards, and

thus BIOS will not assign this region for PnP/ISA and PCI cards.

PCI

Chipset