User`s manual

Chapter 1 Hardware Configuration 11

You may find a pair of needle-nose pliers useful for setting the jumpers.

If you have any doubts about the best hardware configuration for your

application, contact your local distributor or sales representative before

you make any changes.

1.8.1 CPU clock ratio select (JP2)

In order for the system to function properly, the jumpers must be set to

accommodate the CPU installed on the CPU card.

Table 1-3: CPU clock ratio select (JP2)

Pentium CPU, AMD K5, Cyrix M1, IDT C6

100 MHz 166 MHz

1.5 x 66 2.5 x 66

*133 MHz 200 MHz

2 x 66 3 x 66

150 MHz 233 MHz

2 x 75 3.5 x 66

266 MHz 300 MHz

4 x 66 4.5 x 66

* default setting

Refer to the CPU speed reference table (below) for instructions on

adjusting the internal clocks according to the base CPU speed.

Table 1-4: CPU speed reference table

CPU Speed (MHz) 100 *133 150 166 200 233 266 300

Clock setting 66 66 75 66 66 66 66 66

Frequency ratio 1.5 2 2 2.5 3 3.5 4 4.5

* default setting

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