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  Interrupt:   21h     Function:   14h
 
  Title:       Sequential Read
 
  See also:    Read File or Device
 
  Description:
 
     Reads the next sequential block of data from a file and then
     increments the file pointer appropriately.
 
     Input                         Output
 
     AH = 14h                      AL = 00h (if read successful)
     DS:DX = segment:offset of        = 01h (if end-of-file)
             previously opened        = 02h (if segment wrap)
             file control block       = 03h (if partial record at
                                             end-of-file)
                                    -♦-