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From: ralf+@cs.cmu.edu (Ralf Brown)
Newsgroups: comp.os.msdos.programmer
Subject: Re: Removing disks
Message-ID: <13598@pt.cs.cmu.edu>
Date: 24 Jun 91 02:03:50 GMT
References: <JNEWS-2@smylex.UUCP> <10927@plains.NoDak.edu>
Organization: School of Computer Science, Carnegie Mellon
Lines: 19

In article <10927@plains.NoDak.edu> jnelson@plains.NoDak.edu (Jim Nelson) writes:
}It would seem that there has to be some way to do it.  Fastback is seems to
}be able to tell when you have changed the disk when backing up/restoring.
}It beeps at you when the disk is full, you open the drive door, replace the
}disk, close the drive door, and it starts writing again.  No "Press Enter to
}Continue" message.

It is possible to ask the floppy disk controller chip for the state of the
write-protect signal.  If you ask often enough, you will see the write-
protect go true when the disk is removed, and then go true again when a
new disk is inserted.  This won't work on a write-protected disk though,
since the write-protect never goes false while the disk is in the drive.


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