All data is stored in Motorola 68000 format.  The bytes of multiple-byte
values are stored with the high-order bytes first.  Data is organized as
follows:

                7  6  5  4  3  2  1  0
              +-----------------------+
        char: | msb              lsb  |
              +-----------------------+

               15 14 13 12 11 10  9  8  7  6  5  4  3  2  1  0
              +-----------------------+-----------------------+
        char: | msb    byte 0         |        byte 1     lsb |
              +-----------------------+-----------------------+

               15 14 13 12 11 10  9  8  7  6  5  4  3  2  1  0
              +-----------------------+-----------------------+
        char: | msb    byte 0         |        byte 1         |
              +-----------------------+-----------------------+
        char: |        byte 2         |        byte 3     lsb |
              +-----------------------+-----------------------+

                Figure 1: IFF data storage formats