Assembly Language Help (alang.hlp) (Table of Contents; Topic list)
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Int 13h Function 06h
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  Interrupt:   13h     Function:   06h
 
  Title:       Format Bad Track
 
  Description:                                                       [PC]
 
     Initializes a track, writing disk address fields and data sectors
     and setting bad sector flags. This function is defined for PC/XT
     fixed disk drives only.
 
     Input                        Output
 
     AH = 06h                     If function successful
     AL = Interleave                Carry flag: clear
     CH = Cylinder                  AH = 00h
     DH = Head
     DL = Drive                   If function unsuccessful
        = 80h-FFh fixed disk        Carry flag: set
                                    AH = Status
                                         See: Int 13h Function 01h
                                    -♦-