B-16
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ni.com
Appendix B
Hardware Configuration
NMI Button
The non-maskable interrupt button header is located on pins 19 and 20 of JF1.
Jumpers
To modify the operation of the motherboard, jumpers are used to choose between optional
settings. Jumpers create shorts between two pins to change the function associated with it. Pin 1
is identified with a square solder pad on the printed circuit board. See the motherboard layout
page for jumper locations.
Note
On a two-pin jumper,
closed
means the jumper is on both pins and
open
indicates the jumper is either on only one pin or has been completely removed.
CMOS Clear
JBT1 is used to clear the CMOS, which will also clear any passwords. Instead of pins, this
jumper consists of contact pads to prevent accidentally clearing the contents of the CMOS.
Complete the following steps to clear the CMOS
1.
First power down the system and unplug the power cord(s).
2.
Remove the cover of the chassis to access the motherboard.
3.
Remove the onboard battery from the motherboard.
4.
Short the CMOS pads with a metal object such as a small screwdriver for at least four
seconds.
5.
Remove the screwdriver (or shorting device).
6.
Replace the cover, reconnect the power cord(s) and power on the system.
Note
Clearing the CMOS will also clear all passwords.
Caution
Do not use the PW_ON connector to clear the CMOS.
LAN1/2 Enable/Disable
Change the setting of jumper JPL1 and JPL2 to enable or disable the LAN1 and LAN2 Ethernet
ports, respectively. The default setting is
Enabled
.
Table B-31.
NMI Button Pin Definitions (JF1)
Pin
Definition
19
Control
20
Ground
