SY-6IWM
Quick Start Guide
Step 4. Set JP2, JP3,JP4 and JP7 to configure CPU FSB Frequency
The FSB Frequency can be set through the BIOS
[SOYO COMBO SETUP]
. The BIOS will
allow selection from 1 out of 3 intervals. The intervals are: - 66 to 100MHz
- 100 to 133MHz
- 133Mhz and above
What interval can be selected from depends on the jumper setting on the board.
Ø
CPU Default or Free Selection
Ø
CPU frequency indication
Your INTEL CPU has pins that tell the motherboard what frequency it is supposed to run at.
If your CPU is a 66Mhz or a 100Mhz type, it will use pin B21 to indicate this. If it is high, the
CPU is 66MHz type, if it is low, the CPU is a 100MHz type. If you have a 133MHz CPU, it will
use an additional pin (A14) to tell the motherboard. If pin A14 is low, the CPU is a 133MHz
type. For 66 and 100MHz CPUs this pin is high.
The signals of these two pins are connected to the clock generator of the board through JP3
and JP7. If both jumpers are closed, the clock generator will run the CPU at the default
frequency. (Note that both JP2 and JP4 should be open)
The frequency interval that is shown in the BIOS is related to this frequency as follows:
66MHz CPU
66 - 100MHz interval
100MHz CPU
100 - 133MHz interval
133MHz CPU
133 or above interval
The frequency interval in the BIOS will be the same as mentioned above.
Summary (Default frequency)
The following table summarizes the above:
JP3 JP7 JP2 JP4
Frequency according to
CPU
closed closed open open
Free Selection
If the user does not want the CPU to run at the specified (default) frequency, then
JP3 and
JP7 will have to be set to open
. Now the frequency can be set by the user through JP2
and 4 in the following way:
