Cpu Clock Frequency Selector: Jp1 - Acorp 4845GLQ Manual

Chapter 1

1.7.14 CPU Clock Frequency Selector: JP1

JP1 is designed to detect the CPU Frequency on board. Setting
JP1 to 2-3 closed (default) will only offer 100MHz CPU clock to
run on board, which will provide a 400MHz Front Side Bus. If
JP1 is set to 1-2 closed, the CPU clock will be auto-detected.
NOTE:
Intel usually provides CPUs with locked CPU frequency so as to
forbid CPU overclock. We therefore don't recommend users to do
CPU overclocking on Intel CPU because you may risk CPU damage.
JP1 Setting
CPU(MHz)
1
1-2 closed
Auto-detect
Intel
845GL
VIA
VT610 5
1-25
Motherboard 4845GLQ
1
2-3 closed
100 MHz
(default)
VIA
Intel
VT6306
ICH4