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documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.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:  Write Sector      [PC] [AT] [PS/2]
 
  Writes one or more sectors from memory to disk.
 
  Input                                     Output
  ══════════════════════════════            ═════════════════════════════
  AH=03H                                    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)
                                    -♦-