Supermicro SUPERSERVER 1028R-MCTR, User Manual, Page: 40 / 75

Chapter 5: Advanced Serverboard Setup
5-21 5-20
S
UPER
S
ERVER 1028R-MCT/MCTR User's Manual
5-9 Jumper Settings
Explanation of Jumpers
To modify the operation of the serverboard,
jumpers can be used to choose between
optional settings. Jumpers create shorts
between two pins to change the function
of the connector. Pin 1 is identified with
a square solder pad on the printed circuit
board. See the diagram at right for an
example of jumping pins 1 and 2. Refer
to the serverboard layout page for jumper
locations.
Note: On two-pin jumpers, "Closed" means
the jumper is on and "Open" means the
jumper is off the pins.
CMOS Clear
JBT1 is used to clear CMOS and will also clear any passwords. Instead of pins,
this jumper consists of contact pads to prevent accidentally clearing the contents
of CMOS.
To Clear CMOS
1. First power down the system and unplug the power cord(s).
2. With the power disconnected, short the CMOS pads with a metal object such
as a small screwdriver.
3. Remove the screwdriver (or shorting device).
4. Reconnect the power cord(s) and power on the system.
Note:
Do not use the PW_ON connector to clear CMOS.
Connector
Pins
Jumper
Setting
3 2 1
3 2 1
VGA Enable/Disable
JPG1 allows you to enable or disable the
VGA port. The default position is on pins
1 and 2 to enable VGA. See the table on
the right for jumper settings.
VGA Enable/Disable
Jumper Settings
Setting Definition
Pins 1-2 Enabled
Pins 2-3 Disabled
LAN Port Enable/Disable
Use JPL1/JPL2 to enable or disable LAN
ports 1 and 2, repectively. See the table
on the right for jumper settings. The
default setting is enabled.
LAN Port En/Disable
Jumper Settings
Setting Definition
Pins1-2 Enabled
Pins 2-3 Disabled
BMC Enable/Disable
JPB1 is used to enable or disable the
BMC (Baseboard Management Control)
chip to provide IPMI 2.0/KVM support.
The default position is on pins 1 and 2 to
Enable BMC. See the table on the right
for jumper settings.
BMC Enable/Disable
Jumper Settings
Setting Definition
Pins 1-2 Enabled
Pins 2-3 Disabled
Watch Dog Enable
Watch Dog is a system monitor that can
reboot the system when a software appli-
cation hangs. Close pins 1-2 of JWD1 to
reset the system if an application hangs.
Close pins 2-3 to generate a non-mask-
able 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
Setting Definition
Pins 1-2 Reset
Pins 2-3 NMI
Open Disabled
I
2
C Bus to PCI-Exp. Slots
Use Jumpers JI
2
C1 and JI
2
C2 to connect
the System Management Bus (I 2 C) to on-
board PCI-Express slots to improve PCI
performance. These two jumpers must
have the same setting. The default setting
is Closed to enable the connections. See
the table on the right for jumper settings.
I 2 C for PCI-E slots
Jumper Settings
Jumper Setting Definition
Pins 1-2 Enabled (Default)
Pins 2-3 Disabled