User`s manual

Green PCI/VL-B/ISA System Board
2-21 u Installation Overview
Jumper J3
CPU Mode Setting
Jumper J3 is used to select CPU internal frequency. You
should not change the default setting of this jumper unless
the CPU installed on the system board is 3.3V Pentium
Processor, System Base Clock frequency 50MHz.
1-2 On:Fx1.5 (50MHz/
75MHz, 60MHz/90MHz
or 66MHz/100MHz CPU)
(Default)
2-3 On: Fx2 (50MHz/
100MHz)
Jumper Settings for CPU
Summary
CPU Clock
75MHz
90MHz
100MHz
1-2 On
(write back) or
2-3 On
(write through)
1-2 On
(write back) or
2-3 On
(write through)
2-3 On
(write through) or
2-3 On
(write through)
J2 J20J3
1-2 On
1-2 On
1-2 On
2-3 On
2-3 On
1-2 On
2-3 On
2-3 On
1-2 On
1-2 On
2-3 On
1-2 On
J21
2-3 On
1-2 On
1-2 On
2-3 On
J22
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