User`s guide

PM-9800 MAINBOARD MANUAL
8
MISCELLANEOUS PIN CONFIGURATIONS
JP1 - CMOS RAM Discharge Selector
PIN DESCRIPTION
1-2 Normal Mode (default)
2-3 Clear CMOS
Make sure that JP1 is set to Normal Mode (pins
1-2) before installing the mainboard.
JPX1 - CPU Fan Connector
PIN DESCRIPTION
1 Data
2 +12V
3 Ground
JPX4 - DIMM Voltage Selector
JPX4A JPX4B DESCRIPTION
1 - 2 1 - 2 5V
2 - 3 2 - 3 3.3V (default)
SW1 - CPU External Clock Selector
SW1-1 SW1-2 SW1-3 DESCRIPTION
ON ON ON 50MHz
OFF OFF ON 60MHz
OFF OFF OFF 66MHz
ON OFF OFF 75MHz
OFF ON ON 83MHz
SW2 - CPU Core Voltage Selector
SW2-1 SW2-2 SW2-3 DESCRIPTION
ON OFF ON 2.5V
ON OFF OFF 2.8V
OFF ON ON 2.9V
OFF OFF OFF 3.0V
ON ON ON 3.0V
OFF ON OFF 3.2V
OFF OFF ON 3.3V
ON ON OFF 3.5V
SW3 - CPU Clock Multiplier Selector
SW3-1 SW3-2 SW3-3 DESCRIPTION
OFF OFF N/A 1.5X
ON OFF N/A 2.0X
ON ON N/A 2.5X
OFF ON N/A 3.0X
OFF OFF OFF 3.5X
ON OFF ON 4.0X
ON ON ON 4.5X