Norco SHB-940, User Manual, Page: 24 / 74

SHB-940
Intel
®
Q45 based PICMG1.3 Full Size CPU Card
13
Setup JCC
setting JCC
1-2 Nomal status(default)
2-3 Clear CMOS(BIOS renew to initialization)
Do not clear CMOS when power on, or it will cause damage to the motherboard.
2.5.2 BIOS-protect Jumper
（
JAV
）
The BIOS of the CPU card is contained in the Flash ROM. If the jumper JAV is set as
dosed, you will be unable to flash the BIOS. However in this status, the system BIOS is
protected from being attacked by serious virus such CIH virus.
Setting JAV
Open Enable to flash BIOS
Close Disable to flash BIOS(default)
2.5.3 COM2 jumper function setting
（
J3, J4, J5
）
The jumper J3, J4, J5 are used to control COM2 transmission mode. COM2 support
RS232/RS422 / RS485 transmission modes. RS232 for default.