Asus M3A - Manual (Page 44)

2-22 Chapter 2: Hardware information
10. USB 2.0 ports 1 and 2. These 4-pin Universal Serial Bus (USB) ports are
available for connecting USB 2.0 devices.
11. USB 2.0 ports 3 and 4. These 4-pin Universal Serial Bus (USB) ports are
available for connecting USB 2.0 devices.
12. Coaxial S/PDIF Out port. This port connects an external audio output device
via an optical S/PDIF cable.
13. PS/2 Keyboard port (purple). This port is for a PS/2 keyboard.
Audio 2, 4, 6, or 8-channel configuration
Port
Headset
2-channel 4-channel
6-channel 8-channel
Light Blue Line In Line In Line In Line In
Lime Line Out Front Speaker Out Front Speaker Out Front Speaker Out
Pink Mic In Mic In Mic In Mic In
Orange – – Center/Subwoofer Center/Subwoofer
Black – Rear Speaker Out Rear Speaker Ou Rear Speaker Out
Gray – – – Side Speaker Out