NEC MC2400 User Manual
Page 77
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