Dell Precision WorkStation 210, User Manual, Page: 165 / 247

Hardware Configuration Features B-1
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This appendix provides specific information about the jumpers on your system board
and the input/output (I/O) ports and connectors on the back panel of your computer. It
also provides some basic information on jumpers, a listing of interrupt request (IRQ)
assignments, and memory maps.
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Jumpers provide a convenient and reversible way of reconfiguring the circuitry on a
printed circuit board. When reconfiguring your system, you may need to change
jumper settings on your system board; you may also need to change jumper settings
on expansion cards or drives.
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Jumpers are small blocks on a circuit board with two or more pins emerging from
them. Plastic plugs containing a wire fit down over the pins. The wire connects the
pins and creates a circuit.
To change a jumper setting, pull the plug off its pin(s) and carefully fit it down onto the
pin(s) indicated.
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A jumper is referred to as
open
or
unjumpered
when the plug is pushed down over
only one pin or if there is no plug at all. When the plug is pushed down over two pins,
the jumper is referred to as
jumpered
. The jumper setting is often shown in text as