Epson CW3S16 Operation Manual page 196

See Figure E-13.
Warning!
The Diskette Format Test, the Random Read/Write Test,
and Sequential Read/Write Test are destructive operations.
This means that the data on the diskette required to
perform these tests will be destroyed. When performing
these operations, be certain that the formatted diskettes
required for these tests does not contain valuable
information which cannot be recovered from the hard disk
or from another diskette.
ROM DIAGNOSTICS. (C) 1986. American Megatrends Inc. Tue. Feb 13, 1990. 11:49.07
Hard Disk
Floppy
c:
A: 1.2MB #03F8 #02F8 Color
Format the Floppy Diskette
Figure E-13. The Floppy Diagnostics Menu
Commu.
Display Printer
Advanced ROM Diagnostics
Memory
#0378 Real=640K
Extd = 3328KB
Co-pmt.
Absent
E-33