Date:	Tue, 27 Apr 1993 20:40:08 -0700 (PDT)
From:	Andrew Tucker <a_tucker AT paul DOT spu DOT edu>
Subject:	Re: managing diff's
To:	Bob Babcock <peprbv AT cfa0 DOT harvard DOT edu>
Cc:	ericb AT lsid DOT hp DOT com, djgpp AT sun DOT soe DOT clarkson DOT edu

On Tue, 27 Apr 1993, Bob Babcock wrote:

> label on a disk.  Other than that, I agree with you.  (My interest in this is
> for a disk cataloging program which currently runs under DOS or the Ergo DOS
> extender.)  The FCB functions which I implemented do not include reading or

I've been writing a disk cataloging program as well, but have caught up on
a snag lately.  How do I detect write protection on a disk without hurting
it?  I can use INT 25 & 26 to do a read/write and detect if it is write
protected, but if it is a 360K disk in a 1.2M drive, bye-bye 360K disk. 
Any suggestions?  I've posed this question to Andrew Schulman, one of the
foremost DOS experts, but he was stumped as well.  

BTW, I realize this isn't djgpp material in any way shape or form.  Sorry!


/* Andrew */

"As far as the laws of mathematics refer to reality, they are not certain;
 and as far as they are certain, they do not refer to reality"
				Albert Einstein

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