Epson 4SLC2-50 - Manual (Page 70)

Installing a Memory Module
Your computer comes with 4MB or 8MB of memory. Two MB are
soldered directly onto the system board, and a 2MB (or 6MB)
memory module is installed in the computer (as shown above).
You can increase your memory to 8MB by replacing the 2MB
memory module with a 6MB module.
Connecting Optional Devices 4-13