Epson EISA Desktop - Manual (Page 87)

The table below describes the type of SIMMs you can install in
these sockets.
SIMM description
The SIMMs for your computer are usually described first by
their number of logical sides (single or double) and then by the
number of bits they contain multiplied by the width of the data
bus (256Kbx36). Check with your dealer to make sure you
install the correct type of SIMMs.
You can install these SIMMs in many different ways. For best
performance, however, follow these guidelines:
Fill each bank with four SIMMs of the same size
Install SIMMs in Bank 0 first and then use Bank 1
Install the highest capacity SIMMs in Bank 0 and the same
or lower capacity SIMMs in Bank 1.
5-12 Installing and Removing Options