10 PCA-6157 User's Manual
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Jumper settings
This section provides instructions on how to configure your card
by setting jumpers. It also includes the card's default settings and
your options for each jumper.
How to set jumpers
You configure your card to match the needs of your application by
setting jumpers. A jumper is the simplest kind of electric switch. It
consists of two metal pins and a small metal clip (often protected
by a plastic cover) that slides over the pins to connect them. To
“close” a jumper you connect the pins with the clip. To “open” a
jumper you remove the clip. Sometimes a jumper consists of a set of
three pins, labeled 1, 2 and 3. In this case you connect either pins 1
and 2, or 2 and 3.
A pair of needle-nose pliers may be useful when setting jumpers.
CPU type and clock speed (JP1, JP16)
The user can choose the CPU frequency by setting the clock
generator jumper (JP1, JP16). If you change processor in the future,
you must make sure that the jumpers are configured for the correct
CPU clock speed. Do this before installing and applying power to
the CPU board.
JP1
JP16
Pentium
75 MHz
Pentium
90 MHz
Pentium
100 MHz (default)
Pentium
120 MHz
Pentium
133 MHz
Pentium
150 MHz
Pentium
166 MHz
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