Epson 3865X Plus - Manual (Page 106)

Using Special VGA Features
Your built-in VGA (video graphics array) display adapter
supports both standard VGA monitors and multi-frequency
monitors with analog connectors. The VGA adapter allows
these monitors to operate in all standard VGA modes without
requiring any special device drivers. However, if you are using a
multi-frequency monitor that supports extended VGA features,
you may want to use one or more of the device drivers provided
on the Utility diskettes that came with your system. These
device drivers allow you to use all of the capabilities of your
monitor and your built-in VGA display adapter.
You need to install device drivers if you want to use extended
VGA features such as these:
Resolutions up to 800 x 600 in graphics modes with
16 colors
132-column text mode in 16 colors
Graphics cursor movement performed by the built-in VGA
hardware.
these resolutions. Standard VGA
display them.
4-14 Enhancing System Operations