2.15 External Back Panel I/O Ports
There are 10 kinds of external connectors on the motherboard. The view angle of the drawing
shown on next page is from the 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”. (USB Ports 3 & 4 are on-board connectors with 2x5
Header.
4. Parallel Port (Burgundy, 25-pin PRN)
The onboard printer port is a 25-pin D-type connector marked “PRN”.
HARDWARE INSTALLATION
17
2.14 Power Connector (20-pin PWR-CONN)
Make sure to plug the ATX power supply connector in 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
+3.3V
-12.0V
GND
PSON#
GND
GND
GND
-5.0V
+5.0V
+5.0V
Power Good
+3.3V
+3.3V
GND
+5.0V
GND
+5.0V
GND
+5.0V Standby
+12.0V
Transcend
COMA
VGA
Parallel Port
PRINTER
