Chapter 2: Installation
2-21
JBT1
FA
N
1
LEB1 LEB2
JLPC80
JUSB2
LE4
SW1
JWD
JBMC1
JPG1
JPL1
JPL2
JBAT1
JNMI1 JRST1
JSPK1
USB0/1
IPMI_LAN
CMOS
CLEAR
P1 DIMM1A
P1 DIMM1B
P1 DIMM2A
P1 DIMM2B
P1 DIMM3B
P1 DIMM3A
InfinBand
P2 DIMM2A
P2 DIMM2B
P2 DIMM1A
P2 DIMM1B
CPU1
CPU2
I-SA
T
A
1
LAN1
LAN2
IPMB
COM1
VGA
Battery
P2 DIMM3A
P2 DIMM3B
Slot 1 PCI-E 2.0 x16
Connector
Winbond
WPCM450
InfiniBand
CTRL
JUSB2
C384
LAN CTRL1
LAN CTRL2
PHY
Intel 5520 (IOH-36D)
Intel ICH10R
South Bridge
BIOS
PWR Supply
FP
CTRL
X8DTT-H
LE1 LE3
JF2
LE2
Rev. 1.3
Intel 5500 (IOH-24D)
(For OEM only)
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 sys-
tem, remove the AC power cord and then short JBT1 to clear CMOS.
A. Clear CMOS
B. Watch Dog Enable
Watch Dog Enable/Disable
Watch Dog (JWD1) is a system monitor that
reboots the system when a software applica-
tion hangs. Close Pins 1-2 to reset the system
if an application hangs. Close Pins 2-3 to
generate a non-maskable interrupt signal for
the application that hangs. See the table on
the right for jumper settings. Watch Dog must
also be enabled in the BIOS.
Watch Dog
Jumper Settings
Jumper Setting Defi nition
Pins 1-2
Reset
(default)
Pins 2-3
NMI
Open
Disabled
A
B
