Important Notice

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documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

   ◄Summary►  ◄Notes►  ◄Back►
──────────────────────────────────────────────────────────────────────────────
 
  Description:  Verify Sector      [PC] [AT] [PS/2]
 
  Verifies the address fields of one or more sectors. No data is
  transferred to or from memory by this operation.
 
  Input                                     Output
  ══════════════════════════════            ═════════════════════════════
  AH=04H                                    If function successful
  AL=number of sectors                      Carry flag=clear
  CH=cylinder                               AH=00H
  CL=sector                                 AL=number of sectors verified
  DH=head                                   If function unsuccessful
  DL=drive                                  Carry flag=set
     00H-7FH floppy disk                    AH=status
     80H-FFH fixed disk                        (see Int 13H Function 01H)
  ES:BX=segment:offset of buffer
        (see Notes)
                                    -♦-