Epson 3865X Plus - Manual (Page 185)

Multi-frequency display
SETVGA Utility Program
This utility lets you operate your VGA adapter in an emulation
mode. Your built-in VGA can emulate (imitate) the operations
of any of the following graphics adapters:
IBM monochrome adapter
IBM color graphics adapter
IBM enhanced graphics adapter
Hercules monochrome graphics adapter.
SETVGA locks your built-in VGA into a specific emulation
mode. This allows you to use application programs that were
written especially for one of these adapters when you cannot
run these programs in regular VGA mode.
Note
Only a few old software packages require the SETVGA
program.
A-40 Using the VGA Utilities