Chapter 2
System Board Setup
This chapter describes the individual jumpers and connectors switches on
the MGI486 system board. If your system board has already been
installed by the dealer, you should refer to this chapter if you plan to
make any changes or upgrade your system.
System Board Jumpers
Jumpers are used to select between various operating modes or options.
A jumper switch consists of two or three gold pins projecting from the
system board. Placing the plastic jumper cap over two pins connects
those pins and makes a particular selection. If the cap is not placed over
two pins, the pins are open and a connection is not made. This is the
general method for storing jumpers when a connection is not required.
For all of the following jumpers,
•
1 – 2 indicates that a jumper is to be installed between pins 1 and
2 (pin 1 is identified only on connectors with 3 or more pins).
•
2 – 3 indicates that a jumper is to be installed between pins
2 and 3.
•
“Short” indicates a jumper is installed on a connector with 2 or
more pins.
•
“Open” or no entry indicates that no jumper is to be installed
(store the jumper on one pin only).
Manual No. 771924-D03, Mar. 1995
2-1
