PB680 MMX Motherboard Jumpers

Jumper J1F2, Blocks A, B, C, D

Function Jumpers Configuration
CMOS Clear J1F2A 4-5 - Normal
5-6 - Clear
Password Clear J1F2A 1-2 - Password Enabled
2-3 - Password Disabled
CMOS Setup AccessJ1F2B1-2 - Enabled
2-3 - Access Denied
Processor VoltageJ1F2B4-5 - Standard Voltage (3.3v)
5-6 VRE
Host Bus Speed,
(Note: PCI clock speed equals
1/2 Host Bus Speed)
J1F2C 1-2, 5-6 - 66 MHz
2-3, 4-5 - 60 MHz
2-3, 5-6 - 50 MHz
CPU Clock Ratio J1F2D 1-2, 4-5 - x1.5
2-3, 4-5 - x2.0
2-3, 5-6 - x2.5
1-2, 5-6 - x3.0

Jumper J9C1 BIOS Recovery
Function Configuration
1-2, 4-5 Normal
2-3, 5-6 Recover