Disclosed are a method and apparatus of non-system bus width data transfer executable at a non-aligned system bus address. In one embodiment, a method of a controller is described. The method includes applying a FIFO buffer having a buffer width (e.g., determined using a transfer algorithm) that is wider than that of a system bus width. A system bus that permits transfer of data amounts which are non-integer multiples of a width of the system bus is used. The system bus is designed such that it supports any non-aligned system bus address. Data is transferred between devices coupled to the system bus.