User’s Guide
BIOS Setup
4-25
Item
Options
Descriptions
A . Slot 1 Using INT#
Slot 2 Using INT#
Slot 3 Using INT#
Slot 4 Using INT#
AUTO
A
B
C
D
A,B,C,D : These options are reserved
for “Dirty” cards from
which the system BIOS
cannot tell which INT does
it use.
Note:
−
Choose ”AUTO” for all devices
unless you know exactly which
card is a dirty device and which
INTs that card uses.
−
Choose only ”AUTO” for Multi-
Function PCI devices because
options A, B, C, D will force the
BIOS to assign IRQs for function
only.
B. 1st Available IRQ
2nd Available IRQ
3rd Available IRQ
4th Available IRQ
3
4
5
7
9
10
11
12
14
15
NA
The system BIOS will assign these 4
available IRQs to the found PCI
devices.
C. PCI IRQ Activated
by
Edge
Level
To tell the chipset the IRQ signals
input is level or edge trigger.
D. PCI IDE 2nd
Channel
Enable
Disable
Enable/disable 2nd channel of
PCI/IDE card. It includes I/O port
(170H~177H) and IRQ 15 assign-
ment
E. PCI IDE IRQ
Map To
PCI-AUTO
PCI-SLOT1
PCI-SLOT2
PCI-SLOT3
PCI-SLOT4
ISA
PCI-AUTO
The BIOS will:
−
scan for PCI IDE devices and
determine the location of the PCI
IDE device
(See item below)