Assembly Language Help (alang.hlp) (Table of Contents; Topic list)
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Int 13h Function 02h
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  Interrupt:   13h     Function:   02h
 
  Title:       Read Sector
 
  Description:                                          [PC] [AT] [PS/2]
 
     Reads one or more sectors from disk into memory.
 
     Input                                  Output
 
     AH = 02h                               If function successful
     AL = Number of sectors                   Carry flag: clear
     CH = Cylinder                            AH = 00h
     CL = Sector                              AL = Number of sectors
     DH = Head                                     transferred
     DL = Drive
        = 00h-7Fh floppy disk               If function unsuccessful
        = 80h-FFh fixed disk                  Carry flag: set
     ES:BX = segment:offset of buffer         AH = Status
                                                   See: Int 13h Function 01h
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