Epson U11, U12 Installing a Math Coprocessor, 6.Reinstall the CPU card as described on page

5.If you installed the ODP486DX/33, you need to change the jumper setting of W3. See page 3-19 for instructions.

6.Reinstall the CPU card as described on page 3-19.

7.After you replace the computer’s cover, run the SETUP program so your computer can update its configuration. See Chapter 2 of the Setup Guide for instructions. (You need only run the program and save the configuration; you do not need to change any settings.)

Installing a Math Coprocessor

A math coprocessor speeds up the numeric calculations your computer performs when using some applications. It also increases the speed at which graphic images are displayed on your monitor when you use certain graphics programs.

Roth the 486DX/33 and the 486DX2/66 CPU cards have a math coprocessor built into the microprocessor, but they also have an additional socket in which you can install a Weitek 4167 math coprocessor. On the 486SX/25 card, you can install a 487SX/25 microprocessor chip in the OverDrive module socket. This microprocessor has a built-in math coprocessor and replaces the 486SX/25 microprocessor on the card.

Note

If you install the 487SX/25 microprocessor chip, you cannot also install an OverDrive module on the card because both options require the same socket.

3-24 Installing and Removing Options