Hardware Reference
28
GLAN enable/disable
Use JPL1 to enable or disable GLAN port1/GLAN port2 on the motherboard.
CMOS clear
JBT1 is used to clear CMOS. Instead of pins, this “jumper” consists of contact pads to prevent
the accidental clearing of CMOS. To clear CMOS, use a metal object such as a small screwdriver
to touch both pads at the same time to short the connection. Always remove the AC power cord
from the system before clearing CMOS.
Note: For an ATX power supply, you must completely shut down the system, remove the AC
power cord and then short JBT1 to clear CMOS.
I
2
C Bus to PCI-Express slots
Use jumpers JI
2
C1 and JI
2
C2 to connect the System Management Bus (I
2
C) to PCI-Express
slots in order to improve PCI slot performance. These two jumpers are to be set at the same
time. The default setting is Closed to enable the connections.
VGA enable
Jumper JPG1 allows you to enable video connections on the motherboard.
Table 30. GLAN Enable jumper settings
Pin # Definition
1–2 Enabled (default)
2–3 Disabled
Table 31. I
2
C for PCI-E Slots jumper settings
Jumper Setting Definition
Closed Enabled (default)
Open Disabled
Table 32. VGA enable jumper settings
Jumper Setting Definition
Pins 1–2 Enabled (default)
Pins 2–3 Disabled
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