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documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

 ◄Detail►                                    ◄Up► ◄Contents► ◄Index► ◄Back►
────────────────────────────────────────────────────────────────────────────
 
  Interrupt:   13h     Function:   04h
 
  Title:       Verify Sector
 
  Description:                                          [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
     DL = Drive                           If function unsuccessful
        = 00h-7Fh floppy disk               Carry flag: set
        = 80h-FFh fixed disk                AH = Status
     ES:BX = segment:offset of buffer            See: Int 13h Function 01h
                                    -♦-