Asus P4B266 - Manual (Page 20)

1-8 Chapter 1: Product introduction
PS/2 mouse port. This green 6-pin connector is for a PS/2 mouse.
Parallel port. This 25-pin port connects a parallel printer, a
scanner, or other devices.
Game/MIDI port. This connector supports a joystick or a game pad
for playing games, and MIDI devices for playing or editing audio
files.
(on audio models only)
Microphone jack. This Mic (pink) jack connects a microphone. In
6-channel mode, the function of this jack becomes Bass/Center.
(on audio models only)
Line In jack. This Line In (light blue) jack connects a tape player or
other audio sources. In 6-channel mode, the function of this jack
becomes Rear Speaker Out.
(on audio models only)
Line Out jack. This Line Out (lime) jack connects a headphone or
a speaker. In 6-channel mode, the function of this jack becomes
Front Speaker Out.
(on audio models only)
Serial ports. These two 9-pin COM1/COM2 ports are for pointing
devices or other serial devices.
USB ports. These two 4-pin Universal Serial Bus (USB) ports are
available for connecting USB devices such as a mouse and PDA.
PS/2 keyboard port. This purple 6-pin connector is for a PS/2
keyboard.
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