The pages on this site contain documentation for very old MS-DOS software,
purely for historical purposes.
If you're looking for up-to-date documentation, particularly for programming,
you should not rely on the information found here, as it will be woefully
out of date.
SYS1310
SYS1310Explanation
The FORMAT command was entered without a drive letter.
Action
Retry the FORMAT command and include the letter of the drive to be
formatted.