Int 2F Fn 1228  U - DOS 3.3+ Internal - Move File Pointer                  [D]

   AX = 1228h
   BP = 4200h, 4201h, 4202h (see INT 21/AH=42h)
   BX = file handle
   CX:DX = offset in bytes
   SS = DOS DS (must be using a DOS internal stack)

Return: as for INT 21/AH=42h

Notes: equivalent to INT 21/AH=42h, but may only be called from inside a DOS
     function call
   sets user stack frame pointer to dummy buffer, moves BP to AX, performs
     LSEEK, and restores frame pointer
   used by NLSFUNC to access COUNTRY.SYS when invoked by the DOS kernel

See Also: INT 21/AH=42h