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AIMB-253 Mainboard
Back Panel
Serial Port Connector
The serial port is a 16550A high speed communications port that sends/ receives 16
bytes FIFOs. You can attach a serial mouse or other serial devices directly to the con-
nector.
VGA Connector
The DB15-pin female connector is provided for VGA monitors.
Mouse/Keyboard Connector
®
The standard PS/2
mouse/keyboard DIN connector is for a PS/2
USB Connectors
The OHCI (Open Host Controller Interface) Universal Serial Bus root is for attaching
USB devices such as keyboard, mouse, or other USB-compatible devices.
Audio Port Connectors
These audio connectors are used for audio devices. You can differentiate the color of
the audio jacks for different audio sound effects.
Blue audio jack - Line In is used for external CD player, tapeplayer or
Green audio jack - Line Out, is a connector for speakers or headphones.
Pink audio jack - Mic In, is a connector for microphones.
LAN (RJ-45) Jack
The standard RJ-45 jack is for connection to
single Local Area Network (LAN). You can
connect a network cable to it.
LED
Color
LED State
Off
Left
Orange
On (steady state)
On (brighter & pulsing)
Off
Green
Right
On
Orange
On
2-8
other audio devices.
Activity Indicator
Condition
LAN link is not established.
LAN link is established.
The computer is communicating with another computer on the LAN.
10 Mbit/sec data rate is selected.
100 Mbit/sec data rate is selected.
1000 Mbit/sec data rate is selected.
®
mouse/keyboard.
Link Indicator
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