SOYO 5EAS5 P55C - Manual (Page 9)

Introduction 5
Remarks on the Cyrix and IBM P200
+ CPUs
Please note that if you use a Cyrix or IBM P200
+
CPU, you will have to set the
frequency to 75MHz. You will also have to set JP16, the PCI bus frequency
jumper to asynchronous to have the PCI bus run on 32MHz, in order to avoid
problems with add-on cards. If you choose to run the PCI bus on a higher
frequency, please use only high-end add-on cards that are specified to function
on higher bus frequencies. Please note that using a 75MHz bus clock also places
higher demands on the DRAM main-memory, therefore only use high-end
SIMM/DIMM modules when this is the case.
Voltage settings list
Jumpers 30, 31 and 32 set the processor voltage. If you are using a single voltage
processor close jp31 and open jp30. Jp31 shorts the processor Vcore voltage pins
to the Vio pins when closed. If you use a dual voltage CPU, open jp31 and close
jp30.
Jp 32 sets the voltage, please refer to the following table:
voltage JP32
1-2 3-4 5-6 7-8
3.5V close close close close
3.4V close close close open
3.3V close close open close
3.2V close close open open
3.1V close open close close
3.0V close open close open
2.9V close open open close
2.8V close open open open
2.7V open close close close
2.6V open close close open
2.5V open close open close
2.4V open close open open
2.3V open open close close
2.2V open open close open
2.1V open open open close
2.0V open open open open