Hardware installation guide
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20
4.4 Indicators of System Status
4.4.1 List
Name
Function
LED6
GPO use
LED17
GPO use
LED16
GPO use
SW1
GPI use
Table-23
Indicators of System Status
4.4.2 Descriptions
What are the status of LEDs when system booting?
(1) All three LEDs will light on after system power-up.
(2) The right LED is off, which means that system is running POST. BIOS startup
messages will be displayed on serial console.
(3) Two LEDs on the right side are off, which means that POST is complete. At this
time, press F4 to enter BIOS menu to modify the setting.
How to use the status indicator LEDs and Micro switch SW1?
After system boots completely, entering I/O space based address 480H and edit
register values as following:
480H+28H 7 6 5 4 3 2 1 0
Bit2
Bit2=1 LED6 will be light on
Bit2=0 LED6 will be light off
480H+09H 7 6 5 4 3 2 1 0
Bit2
Bit2=1 LED16 will be light on
Bit2=0 LED16 will be light off
480H+08H 7 6 5 4 3 2 1 0
Bit3
Bit3=1 LED17 will be light on
Bit3=0 LED17 will be light off