MSI MS9A19 User Guide - Page 29

COM Port Power Jumper: JCOMP1, Clear CMOS Jumper: JBAT1

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Page 29 highlights

Mainboard Jumpers MS-9A19 COM Port Power Jumper: JCOMP1 These jumpers specify the operation voltage of the onboard serial ports. 1 2 3 4 JCOMP1 1 2 3 4 VCC5 1 2 3 4 +12V 1 2 3 4 VCC5 1 2 3 4 +12V Clear CMOS Jumper: JBAT1 There is a CMOS RAM onboard that has a power supply from an external battery to keep the data of system configuration. With the CMOS RAM, the system can automatically boot OS every time it is turned on. If you want to clear the system configuration, set the jumper to clear data. 1 JBAT1 1 Keep Data 1 Clear Data Important You can clear CMOS by shorting 2-3 pin while the system is off. Then return to 1-2 pin position. Avoid clearing the CMOS while the system is on; it will damage the mainboard. 2-13

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2-13
MS-9A19
M
AINBOARD
J
UMPERS
COM Port Power Jumper: JCOMP1
These jumpers specify the operation voltage of the onboard serial ports.
Clear CMOS Jumper: JBAT1
There is a CMOS RAM onboard that has a power supply from an external
battery to keep the data of system configuration. With the CMOS RAM, the
system can automatically boot OS every time it is turned on. If you want to
clear the system configuration, set the jumper to clear data.
JBAT1
1
1
1
Keep Data
Clear Data
JCOMP1
1
2
3
4
VCC5
+12V
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
VCC5
+12V
Important
You can clear CMOS by shorting 2-3 pin while the system is off. Then return
to 1-2 pin position. Avoid clearing the CMOS while the system is on; it will
damage the mainboard.