Epson 500 Series - Manual (Page 60)

lnstalling a Numeric Coprocessor
Your computer has a socket for a numeric (math) coprocessor,
which can be used for the Cyrix 83S87-25 coprocessor. Installing a
numeric coprocessor speeds up your computer's numeric
calculations and graphic displays when you are using certain
application software. Contact the EPSON connection or your sales
representative for additional information on choosing a numeric
coprocessor compatible with the Cyrix 486SLC2-50 CPU.
The coprocessor chip can be easily damaged and is expensive to
replace; so if you don’t feel confident about installing it yourself,
ask your Authorized EPSON Servicer for assistance.
To install the coprocessor, follow these steps:
1. Remove the keyboard as described on page 4-11.
Caution
Make sure you ground yourself before you touch the
coprocessor chip. Then remain as stationary
while you install it. Do not touch the pins on the chips;
handle the coprocessor only by the
Connecting Optional Devices 4-15