File format for Biik archive files

All values are in little-endian for RISC OS and Windows data files, and in big-endian for Macintosh files. Strings are null terminated, then the file size is padded to a multiple of 4 bytes.

Offset	Size	Description
0x0	8	BIIK-DJC
0x8	4	Header size.
0xC	4	Archive version? 1 is used for RISC OS and Macintosh archives, while 2 is used for Windows archives.
0x10	4	Game ID. Must match ID provided by the interpreter, otherwise it will crash.
0x14	4	Offset to file index.

The Game ID can be one of the following values:

• Dinosaur Discovery demo: 0x01
• A Mouse in Holland: 0x03
• Explore with Flossy the Frog: 0x05
• Dinosaur Discovery: 0x06
• Betsi the Tudor Dog: 0x08
• Guardians of the Greenwood: 0x0D
• Patch the Puppy: 0x11
• Find It Fix It: 0x12
• Darryl the Dragon: 0xFF

The file index is usually positioned at the end of the file. It consists of a header, followed by one or more entries. The header has the following format:

Offset	Size	Description
0x0	4	Always 3?
0x4	4	Size of file index.
0x8	4	Size of index header.
0xC	varies	Title of index (usually File index).

Each entry has the following format:

Offset	Size	Description
0x0	4	Size of entry.
0x4	4	Offset to file header.
0x8	varies	File name.

The file itself is prefixed by a second header, which contains more infomation about the file. The format of the header is as follows:

Offset	Size	Description
0x0	4	Type of file.
0x4	4	Combined size of the file and the header.
0x8	4	Size of the header.
0xC	varies	File name.

The file type can be one of the following values:

• 1 is an image.
• 2 is an ArcTracker module.
• 9 is a script file.
• 11 is a Draw file.
• 15 is a co-ordinates file.

The embedded file follows immediately after this header.