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Installing Components 33
Setting the jumpers
The system board jumpers let you change several system functions.
Jumpers are set to the default positions at the factory. You may need to
change the jumper settings to perform the following functions:
•
Set processor/bus speed settings
•
Clear CMOS memory
Processor speed jumper
The system board supports a range of processor speeds, which are set by
changing jumpers. If you upgrade your processor, you may need to change
jumper settings. The Processor Speed jumper (JP22) configuration block
lets you set the processor speed.
The system automatically detects the bus speed supported by the processor
and uses the jumper settings in conjunction with the detected bus speed to
set the processor speed. If two processors are present and they support
different speeds, the system operates at the slower speed. Move the jumper
shunts on jumper block JP22 to connect the jumper pins according to the
table below. Processor speeds are given in relation to bus speeds of
66MHz/100MHz.
4075.book Page 33 Friday, April 2, 1999 9:26 AM