Int 21 Fn 4401  - Dos 2+ - Ioctl - Set Device Information                  [D]

   AX = 4401h
   BX = handle (must refer to character device)
   DX = device information word (see #1110)
       (DH must be zero for DOS version prior to 6.x)

Return: CF clear if successful
   CF set on error
       AX = error code (01h,05h,06h,0Dh) (see #1366 at AH=59h/BX=0000h)

Note:  this function was not supported by Digital Research's DOS-Plus

See Also: AX=4400h,INT 2F/AX=122Bh