EPOX EP-61BXC-A, User Manual

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BIOS EP-61BXC-A
Page 4-17
Disabled: Normal Setting.
Enabled: If you have plugged in some Legacy cards to the system and they
were recorded into ESCD (Extended System Configuration Data), you can
set this field to Enabled in order to clear ESCD.
PCI IDE IRQ Map To: This item allows the user to configure the system for the
type of IDE hard disk controller in use. By default, the BIOS assumes that the hard
drive controller is an ISA device rather than a PCI controller. If you are using a PCI
controller, then you will need to change this to specify which PCI slot has the control-
ler and which PCI interrupt (A, B, C, or D) is associated with the connected IDE
devices.
The default value is PCI-AUTO. This will allow the system to automatically config-
ure the IDE devices.
Used MEM base addr: The Used MEM base addr (CB00, CC00, D000, D400,
D800, DC00) and Used MEM Length (8K, 16K, 32K, 64K) are used to 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 that is used by the legacy device to avoid the
memory space conflict. For example, if you select “D000” for Used MEM base
addr” and “16K” for “Used MEM Length”, that means the address region D000H-
D3FFFH is occupied by ISA legacy cards, and thus BIOS will not assign this region
for PnP/ISA and PCI cards.
The default is N/A.
Assign IRQ For USB: This item allows BIOS to assign whether IRQ is with USB
or not. If you have not connect the USB device. Can release the IRQ for other
device.
P C I
I N T C
I N T D
I N TA
I N T B I N T B
I N T C
I N T D
I N TA I N TA
I N T B
I N T C
I N T D
P C I # 3 P C I # 2 P C I # 1
IN TA
IN T B
IN T C
IN T D
F ig u re 7: T h e C o m b in a tio n o f P C I IN T # lin e s