HelpPC 2.10 Quick Reference Utility Copyright 1991 David Jurgens

                       INT 21,F - Open a File Using FCB

       AH = 0F
       DS:DX = pointer to unopened FCB

       on return:
       AL = 00 if file opened
          = FF if unable to open

       - opens an existing file using a previously setup FCB
       - the FCB fields drive identifier, filename and extension
         must be filled in before call
       - sets default FCB fields; current block number is set to 0;
         record size is set to 80h; file size, date and time are set
         to the values from the directory
       - does not create file, see  INT 21,16
       - DOS 2.x allows opening of subdirectories, DOS 3.x does not

Esc or Alt-X to exit int 21,f Home/PgUp/PgDn/End ←↑↓→
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