SOYO SY-7ISA quick start CPU Frequency Settings JP6, JP7, CJ1 and CJ2, Cmos Clear JP5

SY-7ISAQuick Start Guide

Step 9. CPU Frequency Settings: JP6, JP7, CJ1 and CJ2

For certain Intel CPUs, the multiplier is not locked such that setting a multiplier higher than specified on the CPU is possible. For technical details read the following:

Your FC-PGA 133/100/66 MHz FSB CPU has a pin JP6, JP7 to tell it what FSB frequency the CPU requires; If these two jumpers are shorted the motherboard will automatically run at the frequency the CPU was specified to run at.

However, the FSB Frequency can also be set through jumpers CJ1 and CJ2 and it may therefore differ from the Frequency the CPU specifies. If CJ1 and CJ2 are to be used, JP6 & JP7 must be open. Doing so may however force your CPU to operate out of its specifications and therefore SOYO can not guarantee the proper functioning of your system.

Refer to the following table:

CPU Frequency		JP6		JP7		CJ1			CJ2
Automatic		Short		Short		Open			Open
		1	2	1	2	1	2	3	1	2	3
	66MHz	Open		Open		2-3			2-3
		1 2		1 2		1	2	3	1	2	3
Manual	100MHz	Open		Open		1-2			2-3
		1	2	1	2	1	2	3	1	2	3
	133MHz	Open		Open		1-2			1-2
		1	2	1	2	1	2	3	1	2	3

CMOS Clear (JP5)

In some cases the CMOS memory may contain wrong data, follow the steps below to clear CMOS memory.

1.Clear the CMOS memory by momentarily shorting pin 2-3 on jumper JP5. This jumper can be easily identified by its white colored cap.

2.Then put the jumper back to 1-2 to allow writing new of data into the CMOS memory.

CMOS Clearing	Clear CMOS Data			Retain CMOS Data
	Short pin 2-3 for			Short pin 1-2 to
JP5 Setting at least 5 seconds to				retain new
	clear the CMOS			settings
	1	2	3	1 2	3

Note: You must unplug the ATX power cable from the ATX power connector when performing the CMOS Clear operation.

Hardware Installation

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