Int 2F Fn 1226  U - DOS 3.3+ Internal - Open File                          [D]

   AX = 1226h
   CL = access mode
   DS:DX -> ASCIZ filename
   SS = DOS DS (must be using a DOS internal stack)

Return: CF set on error
       AL = error code (see INT 21/AH=59h)
   CF clear if successful
       AX = file handle

Notes: can only be called from within DOS
   equivalent to INT 21/AH=3Dh
   used by NLSFUNC to access COUNTRY.SYS when invoked by the DOS kernel

See Also: AX=1227h,INT 21/AH=3Dh