Epson EL 486UC - Manual (Page 69)

Adding Video Memory
Your computer comes with 512KB of video memory soldered
onto the main system board. You can increase your video
memory to 1MB by installing four video DRAM, 20-pin, 70ns or
Sons, 256KB x 4-bit, DIP (Dual Inline Package) chips. This is
useful for running graphics-intensive applications or for
supporting resolutions up to 1024 x 768 in 256 colors.
For the memory to work properly, you must install chips in one
of the following configurations (each bank consists of two
video memory sockets).
Video memory chip configuration
* Standard video memory
Installing the Video Chips
Follow these steps to install additional video DIP chips:
1. Locate the memory chip sockets on the main system board,
shown on page 4-5.
Bank 0 contains two chips soldered onto the main system
board, so you cannot add video memory in this bank. Bank
1 contains the two filled sockets closest to the soldered
chips. Bank 2 is the two middle sockets and Bank 3 consists
of the remaining two sockets.
2. If there is an option card in your way, remove it. See
page 4-18 for instructions.
Installing and Removing Options 4-21