Epson EQUITY 386SX/16 PLUS - Manual (Page 38)

Setting the Diskette Drive(s)
Your system probably came with one diskette drive installed.
You may have added another drive or replaced the existing
drive with one of a different size or capacity. The SETUP
menu offers five possible selections for your diskette drives
(A and B):
1.2MB
360KB
1.44MB
720KB
Not installed.
Check the settings displayed for both drives and correct them
if necessary. (If you have only one diskette drive, select
Not installed
for drive B.)
2-4 Running the Setup Program