Epson 386/25 - Manual (Page 145)

Note
To use the graphics display drivers in resolutions of 800 x 600
or 1024 x 768, you must have a multi-frequency monitor
capable of displaying these resolutions. Standard VGA
monitors do not have this capability.
Besides the software drivers listed above, the Utility diskettes
also include the following utility programs:
o VGAMODE
o SETVGA
o MODETEST
o WS33INST
o SNOOZE.
Note
You may want to use the SETVGA, MODETEST, and
SNOOZE utilities even if you are not installing any of the
VGA device drivers. See page A-57 for more information.
Using the VGA Utilities A-3