Epson 386/25 - Manual (Page 110)

A math coprocessor speeds up the numeric calculations your
computer performs when using certain application software. If
you purchase a math coprocessor, it is a good idea to ask your
dealer to install it for you, because it can be damaged easily. If
you decide to install it yourself, follow the steps in this chapter.
This chapter also explains how to change the jumper settings
inside the computer. You need to change jumper settings if you
add memory modules, install certain types of option cards, or
want to change the way your computer operates.
Before you can change jumper settings or install any of the
options mentioned above, you need to remove the cover from
the computer. Be sure to heed all the warnings in this chapter so
you do not injure yourself or damage the computer.
Removing the Cover
To install optional equipment or change jumper settings, you
need to remove the cover from your computer. Follow these
steps:
1. Turn off the computer and then any peripherals (including
the monitor and printer).
2. Disconnect the computer’s power cable from the electrical
outlet and from the back panel. Then disconnect any
peripheral cables that are connected to the computer,
including the keyboard cable.
3. If the monitor is on top of the computer, lift it off and set it
to one side.
5-2 Installing
and Removing Options