CSS Laboratories SB-6862, Technical Reference

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8 SB-6862
Jumpers
The board’s jumpers are pre-configured at the factory.
Read the following section carefully, before configuring
your system.
The board has the following jumpers:
Processor Bus Clock Speed JP4, JP3
Pentium Pro processors are designed with one of two bus
clock speeds. The bus clock speed is always a fraction of
the processor’s internal speed.
Bus Clock JP4 JP3
Speed
60 MHz
IN OUT
66 MHz OUT IN
Jumper Description
JP4 Processor bus clock speed
JP26, JP27 Processor bus frequency
JP32, JP31 Processor speed ratio
JP30, JP29
JP69, JP24
Test pins (jumper closed)
JP1, JP2, J70
J47, JP47, JP46
Test pins (jumper open)