Asus A7N266-VM - Manual (Page 36)

24 Chapter 2: Hardware information
3) Universal Serial Bus Ports 0 and 1 (Black two x 4-pin USB)
Two USB ports are available for connecting USB devices.
4) Serial Ports (Teal/Turquoise, One 9-pin COM1, One 10-1 pin COM2)
One serial port can be used for pointing devices or other serial devices. The
other is available as an onboard header. To enable these ports, see Onboard
Serial Port 1 / Onboard Serial Port 2 in 4.4.2 I/O Device Configuration
for the settings.
Universal Serial Bus (USB)
COM 1
Serial Port (9-pin male)
A7N266-VM
®
A7N266-VM Serial COM2 Bracket
PIN 1
COM2