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comp.os.msdos.programmer FAQ part 3/5
Section - - How can I disable access to a drive?

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Top Document: comp.os.msdos.programmer FAQ part 3/5
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 Reader Eric DeVolder writes that he has made available a program to do
 this. I haven't tried it, but it's downloadable from
 <http://www.simtel.net/pub/pd/44403.html>

 Reader Igor Karp reports that MS-DOS version 5.0 and greater provides
 two interrupts to do this.

   --------D-215F07-----------------------------
   INT 21 - DOS 5+ - ENABLE DRIVE
      AX = 5F07h
      DL = drive number (0=A:)
   Return: CF clear if successful
      CF set on error
      AX = error code (0Fh) (see #0885 at AH=59h)
   Notes:   simply  sets the "valid" bit in the  drive's  CDS
   this function is not supported by Novell DOS 7
   See Also: AH=52h,AX=5F08h"DOS"

   --------D-215F08-----------------------------
   INT 21 - DOS 5+ - DISABLE DRIVE
      AX = 5F08h
      DL = drive number (0=A:)
   Return: CF clear if successful
      CF set on error
      AX = error code (0Fh) (see #0885 at AH=59h)
   Notes:   simply clears the "valid" bit in the drive's  CDS
   this function is not supported by Novell DOS 7

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Top Document: comp.os.msdos.programmer FAQ part 3/5
Previous Document: - How can I make my single floppy drive both a: and b:?
Next Document: - How can a batch file test existence of a directory?

Part1 - Part2 - Part3 - Part4 - Part5 - Single Page

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Send corrections/additions to the FAQ Maintainer:
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Last Update March 27 2014 @ 02:11 PM