MSI MS-98D6 Manual page 24

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Hardware Setup
Serial Port Connector: COM1~5, COM6, COM7
These connectors are 16550A high speed communications port that
sends/receives 16 bytes FIFOs.
COM1/ COM2 support 0V/ 5V/ 12V, support ODD and EVEN jumper se-
lection. Each connector could control 2 COM ports.
COM3/ COM4 support RS232, each has a 0V/ 5V/ 12V power jumper.
COM5 supports RS232/ 422/ 485, with a 0V/ 5V/ 12V power jumper.
COM6 supports RS232/ 422/ 485.
COM7 ~ COM10 support RS232, with a 0V/ 5V/ 12V power jumper.
COM3~5
COM1~2
COM6
COM7~COM10
2-12