HP Compaq motherboard

PS/2 mouse port (green). This port is for a PS/2 mouse.

SPDIF coaxial out port. This port connects to external audio output devices with coaxial cable connectors.

IEEE 1394 port. This 9-pin IEEE 1394 port provides high-speed connectivity for audio/video devices, storage peripherals, PCs, or portable devices.

LAN (RJ-45) port. This port allows connection to a Local Area Network (LAN) through a network hub.

Rear Speaker Out port (black). This port connects to the rear speakers on a 4-channel, 6-channel, or 8-channel audio configuration.

Center/Subwoofer port (yellow orange). This port connects the center/subwoofer speakers.

Line In port (light blue). This port connects a tape, CD, DVD player or other audio sources.

Line Out port (lime). This port connects a headphone or a speaker. In 4-channel, 6-channel, and 8-channel mode, the function of this port becomes Front Speaker Out.

Microphone port (pink). This port connects a microphone.

Side Speaker Out port (gray). This port connects to the side speakers in an 8-channel audio configuration.

USB 2.0 ports 1, 2, 3, and 4. These four 4-pin Universal Serial Bus (USB) ports are available for connecting USB 2.0 devices.