MSI 865GM3 manual Serial Port Connectors Coma & JCOM1

Hardware Setup

Serial Port Connectors: COMA & JCOM1

The mainboard offers two 9-pin serial ports COMA and JCOM1. All ports are 16550A high speed communication ports that send/receive 16 bytes FIFOs. You can attach a serial mouse or other serial device directly to them.

1	2 3	4	5			Pin Definition
				PIN	SIGNAL	DESCRIPTION
				1	DCD	Data Carry Detect
				2	SIN	Serial In or Receive Data
6	7	8 9		3	SOUT	Serial Out or Transmit Data
	COMA		4		DTR	Data Terminal Ready
			5		GND	Ground
			6		DSR	Data Set Ready
	1	2	7		RTS	Request To Send
			8		CTS	Clear To Send
			9		RI	Ring Indicate
	9

JCOM1

VGA Connector (for 865GM3 Series only)

The mainboard provides a DB 15-pin female connector to connect a VGA monitor.

5	1	Pin	Signal Description
		1	RED
		2	GREEN
		3	BLUE
		4	N/C
15	11	5	GND
		6	GND
VGA Connector		7	GND
(DB 15-pin)		8	GND
		9	+5V
		10	GND
		11	N/C
		12	SDA
		13	Horizontal Sync
		14	Vertical Sync
		15	SCL

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