INT 21h (33)             DOS Serivce Calls
 
    Most of the DOS functions are implemented as sub-functions of DOS 21h,
    which are listed under Services in the DOS menu.
 
  --------------------------------------------------------------------------
 
       Note:          In general, you should choose to use the DOS service
                      under INT 21h when you have a choice between an
                      interrupt (like INT 27h) and a DOS service (like INT
                      21h, function 31h).
 
                      The "See also" reference above will take you to the
                      first DOS service, function 00h.

Seealso:


 00h