MSI MS-9896 User Manual page 26

Hardware Setup Hardware Setup
Serial Port Power Jumper: JCOMP1, JCOMP2
These jumpers specfy the operaton voltage of the onboard seral ports.
AT/ATX Select Jumper: JAT1
Ths jumper allows users to select between AT and ATX power.
2-12
1 1
JCOMP1/2
+5V
(for COM1/2)
1
JAT1
ATX
(Default)
1
+12V
1 1
AT