Help. End of diskette VS EOF

[Allanon]

In DOS is there a way to tell the difference between the end of a
diskette and the end of a file.  I would like to write files that span
diskette volumes, thus I need to know when I am just at the end of a
diskette and when I am truely at the end of the file.

What is the easy way to do this, if there is one???

Thanks

Walden 

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Walden H. Leverich III               | Inet: levericw at clutx.clarkson.edu
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 Clarkson University                 | SnailMail: 100 Market St.