SHB-940 Intel®Q45 based PICMG1.3 Full Size CPU Card13Setup JCCsetting JCC1-2 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 asdosed, you will be unable to flash the BIOS. However in this status, the system BIOS isprotected from being attacked by serious virus such CIH virus.Setting JAVOpen Enable to flash BIOSClose 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 supportRS232/RS422 / RS485 transmission modes. RS232 for default.