Epson EQUITY 386SX/16 PLUS - Manual (Page 51)

If you saved your changes, the SETUP program resets your
system and the computer runs through its power-on
diagnostic tests.
If something is wrong, however, you see an error message
and a prompt to run SETUP. Follow the instructions on the
screen to run SETUP again to correct it. (You may need to
reset the computer.)
If you have just run SETUP for the first time, the next thing
you need to do is install MS-DOS on your computer. See your
MS-DOS Installation Guide for instructions. (If you are using
a different operating system, follow the installation
instructions provided with it.)
Running the Setup Program
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