Epson 3865X Plus User Manual page 136

Carefully follow these steps to install a math coprocessor in your
computer:
1. Remove the cover. See "Removing the Cover," on page
5-2, for instructions.
2. Turn the computer so that the front panel is facing right
and the back panel is facing left. The math coprocessor
socket is located in the lower front comer of the main
system board, as shown below.
3. If an option
socket, follow the steps in "Removing an Option Card," on
page 5-16, to remove it.
5-30
Installing and
math coprocessor socket
card
is blocking access to the math coprocessor
Removing Options