Epson EQUITY 3865X/20 PLUS - Manual (Page 68)

Copying the Reference Diskette Files
If you have a hard disk, you’ll probably want to copy some of the
files on your Reference diskette to the hard disk. This allows you
to run the programs directly from your hard disk instead of
having to insert a diskette. Use the COPY command (described
in your MS-DOS Reference Manual) to copy the following files
from the Reference diskette to your hard disk:
AFDD.EXE
ESPEED.EXE
HDSIT.COM
HDSIT.VER
ROMBIOS.COM
The Reference diskette also contains files for the Setup program
and the System diagnostics program. However, you should
always run these programs from the Reference diskette in
drive A; so do not copy these files to your hard disk.
Note
Be sure to make backup copies of your Reference diskette. See
your MS-DOS Reference Manual for instructions.
3-2 Using Your Computer