SOYO SY-6ICA User Manual page 44

Hardware Installation
Step 2. CPU Safe Mode (JP7)
If the user overclocks the system there is always the risk that the system
will not boot up properly. In that case closing JP7 will force system to use
the actual CPU multiplier to boot up. The boot-up sequence in that case
will be as follows:
Ø
-The system will start up with the lowest multiplier available.
Ø
-The BIOS will now read the CPU-ID code and set the multiplier in
accordance with it.
Ø
-The system will boot up normally with the actual (non-overclock)
CPU frequency.
CPU Safe
Mode
JP7 Setting
Note: After properly booting up, set JP7 back to open again.
Step 3. Set JP9 for FWH Boot Block Write-Protect
Setting this jumper to open will prevent the boot block area of the FWH
(FirmWare Hub) chip from being written data into such that it is write-
protected from unwanted or abnormal write activity.
Note: In some rare cases, the boot block area will need to be flashed to
complete the BIOS upgrade procedure. Setting JP9 to open will cause
incomplete BIOS update in that case.
The FWH Boot
Block Write-Protect
JP9 Setting
Normal
Open JP7
Locked
open JP9
40
Force actual CPU
Close JP7
1 2
short JP9
1 2
SY-6ICA
Frequency
1 2
Unlocked
1 2