AIMB-580 User Manual 81.8 Jumper SettingsThis section provides instructions on how to configure your motherboard by settingthe jumpers. It also includes the motherboards's default settings and your options foreach jumper.1.8.1 How to set jumpersYou can configure your motherboard to match the needs of your application by set-ting the jumpers. A jumper is a metal bridge that closes an electrical circuit. It consistsof two metal pins and a small metal clip (often protected by a plastic cover) that slidesover the pins to connect them. To “close” (or turn ON) a jumper, you connect the pinswith the clip. To “open” (or turn OFF) a jumper, you remove the clip. Sometimes ajumper consists of a set of three pins, labeled 1, 2, and 3. In this case you connecteither pins 1 and 2, or 2 and 3. A pair of needle-nose pliers may be useful when set-ting jumpers.1.8.2 CMOS clear (CMOS1)The AIMB-580 motherboard contains a jumper that can erase CMOS data and resetthe system BIOS information. Normally this jumper should be set with pins 1-2closed. If you want to reset the CMOS data, set J1 to 2-3 closed for just a few sec-onds, and then move the jumper back to 1-2 closed. This procedure will reset theCMOS to its default setting.*Keep CMOS data 1-2 closedClear CMOS data 2-3 closed*default setting1.8.3 Chassis instruction connector (JCASE1)The AIMB-580 motherboard contains a jumper that offer a chassis open sensor. Thebuzzer on the motherboad beeps when the case is opened.1.8.4 ATX/AT mode selector (PSON1)AT mode 1-2 closed*ATX mode 2-3 closed*default settingTable 1.3: CMOS1Function Jumper SettingTable 1.4: ATX/AT mode selector (PSON1)Function Jumper Setting11
