
Appendix B Hardware Configuration
© National Instruments Corporation B-5 NI 8352/8353 User Manual
Clear CMOS Jumper: JBT1
Caution Always remove the AC power cord from the system before clearing CMOS.
Caution For an ATX power supply, you must completely shut down the system, remove 
the AC power cord, and then short JBT1 to clear CMOS. Do not use the PW_ON connector 
to clear CMOS.
Use JBT1 to clear CMOS. Instead of pins, this “jumper” consists of contact 
pads to prevent accidental CMOS clearing. To clear CMOS, use a metal 
object such as a small screwdriver to touch both pads at the same time to 
short the connection.
Figure B-6.  Clear CMOS Jumper: JBT1
CompactFlash Master/Slave Select Jumper: JP3
Use JP3 to select CompactFlash master (primary) or slave (secondary) 
mode. Close this jumper to enable a CompactFlash card (master/primary 
mode). For the CompactFlash card to work properly, you must connect the 
CompactFlash card power cable to JWF1 and close this jumper to enable it. 
The default setting is disabled.
Figure B-7.  CompactFlash Master/Slave Select Jumper: JP3
Master (Primary)/
Enable CompactFlash Card
Slave (Secondary)/
Disable CompactFlash Card
(Default)