NEC LS2400, User Manual, Page: 67 / 186

Configuring Your System 3-27
System Board Jumper Summary
Jumper Function Pins (default in
bold) What it does at system reset
A CMOS clear 1-2, Protect Preserves the contents of NVRAM.
2-3, Erase Replaces the contents of NVRAM with
the manufacturing default settings.
B Password clear 5-6, Protect Maintains the current system
password.
6-7, Erase Clears the password.
C Recovery Boot
9-10, Normal
System attempts to boot using the
BIOS stored in flash memory.
10-11, Recovery BIOS attempts a recovery boot, loading
BIOS code from a floppy diskette into
the flash device. This is typically used
when the BIOS code has been
corrupted.
D Boot Block Write
Protect 13-14, Protect BIOS boot block is write-protected.
14-15
Erase/Program BIOS boot block is erasable and
programmable.
E FRB Timer Enable 1-2, Enable FRB operation is enabled (system boots
from processor 1 if processor 0 fails).
2-3, Disable FRB is disabled.
F Chassis Intrusion
Detection 5-6, Enable Switch installed on chassis indicates
when cover has been removed.
6-7, Disable Chassis intrusion switch is bypassed.
G BMC Forced Update
Mode 9-10 ,
10-11
System boots normally
System tries to boot BMC firmware.
H Reserved 2-3 Required. Do Not Change
J Reserved
1-2
Required. Do Not Change