Asus M3N-H HDMI - Manual (Page 52)

2-28 Chapter 2: Hardware information
5. IEEE 1394a port connector (10-1 pin IE1394_2)
This connector is for a IEEE 1394a port. Connect the IEEE 1394a module
cable to this connector, then install the module to a slot opening at the back
of the system chassis.
M3N-H/HDMI
®
M3N-H/HDMI IEEE 1394 connector
PIN 1
TPA2- GND TPB2- +12V GND
TPA2+
GND
TPB2+
+12V
IE1394_2
Never connect a USB cable to the IEEE 1394a connector. Doing so will damage
the motherboard!
The IEEE 1394a module is purchased separately.
You can connect the front panel 1394 cable to the ASUS Q-Connector (1394,
red) first, and then install the Q-Connector (1394) to the 1394 connector
onboard if your chassis supports front panel 1394 ports.