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P/I-P6NP5 User's Manual
10
5. CPU External (BUS) Frequency Selection (JP2, JP3)
These jumpers tells the clock generator what frequency to send to the
CPU. These allow the selection of the CPU’s External frequency (or
BUS Clock). The BUS Clock times the BUS Ratio equals the CPU's
Internal frequency (the advertised CPU speed).
6. CPU to BUS Frequency Ratio (JP4, 5, 6, 7)
These jumpers set the frequency ratio between the Internal frequency of
the CPU and the External frequency (called the BUS Clock) within the
CPU. These must be set together with the above jumpers CPU External
(BUS) Frequency Selection.
CPU : BUS Frequency Ratio (2.0x, 2.5x, 3.0x, 3.5x, 4.0x, 5.0x)
2.0 x
2.5 x 3.0 x 3.5 x 4.0 x
JP5
JP7
JP6
JP4
5.0 x
60MHz
123
CPU External Clock (BUS) Frequency Selection
JP2
JP3
66MHz
123
JP2
JP3
Set the jumpers by the Internal speed of the Intel CPU as follows:
JP 200 180 166 150
External Freq.: JP2 [1-2] [2-3] [1-2] [2-3]
JP3 [2-3] [1-2] [2-3] [1-2]
CPU:BUS Ratio: JP5 [On] [On] [On] [On]
JP7 [On] [On] [Off] [Off]
JP6 [Off] [Off] [On] [On]
JP4 [On] [On] [On] [On]
CPU:BUS Ratio: 3.0x 3.0x 2.5x 2.5x
External Freq.: 66MHz 60MHz 66MHz 60MHz
III. INSTALLATION
(Jumpers)
III. INSTALLATION