In this page it's described the header format and the "compression schema".
hexdump of header and more
The starting point of the analysis:
00000000 46 41 54 48 45 41 44 00 00 00 00 00 00 00 00 00 |FATHEAD.........|
00000010 00 90 d3 00 00 00 00 00 00 00 00 00 00 30 f6 0a |.............0..|
00000020 00 00 00 00 00 00 00 00 00 f0 03 00 00 00 00 00 |................|
00000030 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
000003b0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 62 |...............b|
000003c0 f5 b7 83 62 f5 b7 10 00 00 00 00 00 10 00 00 62 |...b...........b|
000003d0 f5 b7 83 62 f5 b7 10 00 10 00 00 e0 0c 00 00 62 |...b...........b|
000003e0 f5 b7 83 62 f5 b7 10 e0 1c 00 00 20 03 00 00 00 |...b....... ....|
000003f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.|
00000400 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
00002200 eb 3c 90 6c 69 62 46 41 54 20 20 00 02 20 08 00 |.<.libFAT .. ..|
...
movinand.bin header
#define MN_FAT_MAGIC "FATHEAD"
#define MN_RFS_MAGIC "RFSHEAD"
#define MN_MAGIC_LEN 0x7
#define MN_PT_OFFSET 0x00000200 // 512 byte
typedef struct moviheadfsentry
{
u_int8_t unk[8]; u_int32_t fs_size;
} mn_fsentry;
typedef struct movihead
{
u_int8_t magic[7]; mn_fsentry fsentry[4];
u_int8_t unk_5[453]; } mn_header;
partition table
Standard MBR (512 byte) at offset 0x00000200 (defined as MN_PT_OFFSET).
compression schema
Simply all filesystem are pruned from the trailing 0x00, concatenated in
movinand.bin file and size stored in movinand.bin header.
This way size in header could be used as offset for the subsequent
filesystem in movinand.bin file.
