A math coprocessor speeds up the numeric calculations and graphic displays your computer performs when using certain application software. The 50 MHz model includes a built-in math coprocessor. If you have the 25 MHz model and you want math coprocessor capabilities, you must remove your 80486SX microprocessor and install the 80487SX microprocessor (with an internal math coprocessor). Because the system circuitry may be damaged if this procedure is not performed correctly, you must have an authorized Epson dealer or Service Center do it for you.

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.

In addition, you’ll find an illustration of your main system board which shows the location of the jumpers, option slots, and any other components you may need to locate.

Before you can change jumper settings or install any of the options mentioned above, you need to remove the cover from the computer. See Chapter 5 for instructions.

6-2Installing and Removing Options