ROM Hack Need some information on NDS file compression

[KazoWAR]

I have no idea what to do. I need to extract the contents of a file that is found in a NDS game. I looked at the file under a hex editor and was able to find bits resembling the original file, but it looks like its encrypted or something.

Here is an example.

http://dl.dropbox.com/u/3706406/Sonic2.png

 

[DarthNemesis]

It's standard LZ77 type 11 compression with every pair of bytes reversed on the output. The file begins at 0x385C00 and ends by 0x390400.

 

[KazoWAR]

It's standard LZ77 type 11 compression with every pair of bytes reversed on the output. The file begins at 0x385C00 and ends by 0x390400.

Ok thanks. If it is standard then there should be a program for it right? I tried googleing but no luck.

 

[Zarcon]

You're going to be embarrassed when you look at Darth's signature.

 

[KazoWAR]

You're going to be embarrassed when you look at Darth's signature.

Oh wow thanks.

EDIT: This stuff is hard.

I am trying to extract the ROMs in the file so that I can do what I did in reverse to put different ones back in. I was in the process of piecing together Sonic 2 but ran in to a road block. The next junk of data in the ROM I seem to be missing from what I got out of Game.pak