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JUMPERS
The default settings are highlighted in the tables that follow.
CPU Frequency Setting (JP3)
Frequency
50 MHz
66 MHz/100 MHz*
75 MHz
83.3 MHz
*Intel Celeron CPU will auto-detect 66 MHz.
* Intel Pentium III (FC-PGA) CPU will auto detect 100MHz.
*Refer to figure 2 for the location of JP3.
CPU Multiplier Setting (JP8)
Ration
3.0 x
3.5 x
4.0 x
4.5 x
5.0 x
5.5 x
6.0 x
6.5 x
7x
7.5x
8x
Refer to figure 2 for the location of JP8.
Watchdog Timer Type Setting (JP5)
The Watchdog Timer is enabled by reading port 443H. It should be triggered be-
fore the timeout period ends; otherwise, it will assume the program operation is
abnormal and will issue a reset signal to reboot or activate NMI to CPU. The
Watchdog Timer is disabled by reading port 043H.
Pin Number
1-2
2-3
Refer to figure 2 for the location of JP5.
1-3
2-4
OFF
OFF
ON
ON
OFF
ON
ON
OFF
1-2
3-4
ON
OFF
ON
OFF
OFF
ON
OFF
ON
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
OFF
ON
OFF
OFF
ON
Description
NMI
RESET
Board Configuration
3-5
4-6
ON
ON
OFF
OFF
ON
OFF
OFF
ON
5-6
7-8
ON
ON
OFF
ON
ON
ON
OFF
ON
ON
ON
OFF
ON
ON
OFF
OFF
OFF
ON
OFF
OFF
OFF
ON
OFF
13
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