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2.14 External Back Panel I/O Ports
There are 5 kinds of external connectors on the motherboard. The view angle of drawing
shown on next page is from back panel of the housing.
1. PS/2 Mouse Port (Green, 6-pin MOUSE)
The onboard PS/2 Mouse port is a 6-pin Mini-Din connector marked “MOUSE”
2. PS/2 Keyboard Port (Purple, 6-pin KB)
The onboard PS/2 Keyboard port is a 6-pin Mini-Din connector marked “KB”.
3. Universal Serial Bus (USB) Ports 1 & 2 (Black, two 4-pin USBs)
You can attach USB devices to the USB port. The motherboard contains two USB ports,
which are marked as “USB”.
4. Parallel Port (Burgundy, 25-pin PRN)
The onboard printer port is a 25-pin D-type connector marked “PRN”.
5. Serial Ports (Turquoise, two 9-pin COMA/COMB)
The onboard serial ports are 9-pin D-type connectors on the back panel of motherboard.
The serial port 1 is marked as “COMA”, and the serial port 2 is marked as “COMB”.
HARDWARE INSTALLATION
17
2.13 Power Connector (20-pin PWR-CONN)
Make sure to plug the ATX power supply connector to the right direction. The pin definition is
shown below. Make sure that your ATX power supply can support at least 720mA on the
standby lead.
Power Connector PSON# : Power Supply on
P W R - C O N N
P o w e r G o o d
+ 3 . 3 V
+ 3 . 3 V
G r o u n d
+ 5 . 0 V
G r o u n d
+ 5 . 0 V
G r o u n d
+5.0V Standby
+ 1 2 . 0 V
+ 3 . 3 V
-12.0V
G r o u n d
P S O N #
G r o u n d
G r o u n d
G r o u n d
-5.0V
+ 5 . 0 V
+ 5 . 0 V
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