Epson 386/25 - Manual (Page 133)

When the SIMM is at an angle, release the tabs and
carefully remove it from the socket.
5. Repeat step 4 for each SIMM you need to remove.
6. Set the appropriate jumpers to indicate the amount of
memory you now have on SIMMs. See “Changing the
Jumper Settings” on page 5-6 for instructions.
7. Replace any option card(s) you may have removed to access
the SIMM sockets. See “Installing an Option Card” on page
5-10 for instructions.
8. Follow the steps on page 5-30 to replace the computer’s
cover. Then see “Post-installation Setup” (following that
section) for instructions on configuring your computer for
use with your decreased memory.
Installing a Math Coprocessor
Your computer has a socket on the main system board to
accommodate either an Intel 80387 (25MHz) or a Weitek 3167
(25MHz) math coprocessor. You can install both if you first
install a Weitek dual-coprocessor adapter in the socket.
A math coprocessor speeds up the numeric calculations your
computer performs when using certain application software. It
also increases the speed at which graphic images are displayed
on your monitor when you use graphics-oriented software.
It is best to have your dealer install a math coprocessor for you,
since it is a delicate component that can be damaged easily if it
is installed incorrectly.
Installing and Removing Options 5-25