System Board Switches - HP Kayak XA 05xx Manual

System Board Switches

System Board Switches
The first system board switch is reserved and should always be set to its
default setting. Switch 1 enables the PC Workstation to be fully compliant in
terms of electromagnetic emissions (clock dithering spread spectrum mode:
the processor clock frequency is moving slightly around its normal
frequency, less than 0.5%).
This implies that the electromegnetic emission pike at frequency processor
is less important. One potential drawback is that around (normally less than
1%) of performance can be lost. This switch is not documented in any of the
user guides and should never change from the default setting.
The next four switches (2 to 4) are used to set the ratio of processor-
frequency to Processor-Local-bus-frequency. The last five switches (5 to 10)
are used to set the configuration for the PC Workstation.
On the desktop model, there is a System Board Switch label located above
NOTE
the CD-ROM cage.
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