fwunpack

zatelli · Feb 13, 2007

fwunpack

DS Firmware unpacker

Chishm said:
For reasons that are too long to bother explaining now, I decided to write a firmware unpacker. That was over a week and a half ago. I finally finished it. So other people don't have to go through the same trouble, get fwunpack.

What does it do?

It decrypts and decompresses all the binaries (parts 1-5 and FlashMe stubs) from a firmware dump.

What use is it?

To satisfy your curiousity.

Can I make my own firmware with this?

No, there is no repacker, but I suppose it isn't too hard to write one now. The worst bit would be writing the compressor for parts 3-5.

Fwunpack - DS Firmware unpacker

TheStump · Feb 13, 2007

Useless fact: at first i thought the program was called Funpack...that is all.

7llusion · Feb 14, 2007

What use would this be, exept for sastifiying your curiosity? Make a new firmware for the DS that looks better?
Illusion

FAST6191 · Feb 14, 2007

Nice tool I will have to try it out.

You can make a new firmware quite reasonably already (all this info is available).

This tool is really just for reverse enginering the standard firmware (to get it to a stage where you can disassemble it), as it says you would have to find a way to re-encrypt and compress it yourself though before you could create your own.

qjopera · Apr 22, 2007

QUOTE(zatelli @ Feb 13 2007 said:
Â Â
Â Â
Â Â Â
Â Â

Â Â
Â Â Â fwunpack

Â Â Â DS Firmware unpacker

Â Â
Â

Â
Â Â
Â Â Â

Chishm said:

For reasons that are too long to bother explaining now, I decided to write a firmware unpacker. That was over a week and a half ago. I finally finished it. So other people don't have to go through the same trouble, get fwunpack.

What does it do?

It decrypts and decompresses all the binaries (parts 1-5 and FlashMe stubs) from a firmware dump.

What use is it?

To satisfy your curiousity.

Can I make my own firmware with this?

No, there is no repacker, but I suppose it isn't too hard to write one now. The worst bit would be writing the compressor for parts 3-5.

Fwunpack - DS Firmware unpacker

QUOTE(FAST6191 @ Feb 14 2007, 04:13 PM)Nice tool I will have to try it out.

You can make a new firmware quite reasonably already (all this info is available).

This tool is really just for reverse enginering the standard firmware (to get it to a stage where you can disassemble it), as it says you would have to find a way to re-encrypt and compress it yourself though before you could create your own.

Click to expand...

so can this be used to replace the vaporware firmware of the MK3 with that of another flashcart's like m3 simply or r4 for better compatibility or ninjads since ninjads has an sd card slot??? can I use this to make MK3 act as a gba cart using it's inner flash plus that of a slot-2 cart for running gba games from the slot-1 carts as long as they are burned???

jeklnoo · Apr 23, 2007

QUOTE(qjopera @ Apr 22 2007 said:
so can this be used to replace the vaporware firmware of the MK3 with that of another flashcart's like m3 simply or r4 for better compatibility or ninjads since ninjads has an sd card slot??? can I use this to make MK3 act as a gba cart using it's inner flash plus that of a slot-2 cart for running gba games from the slot-1 carts as long as they are burned???

no. now go away.

_V1qY · Oct 21, 2013

Are there any sources that can recompress the firmware? I've looked at Desmume source code and it doesn't contain recompressors. I downloaded NitroSDK which does indeed have Huffman compressor, but it is producing a different result from the original when I attempt to repack.

FAST6191 · Oct 21, 2013

_V1qY said:
Are there any sources that can recompress the firmware? I've looked at Desmume source code and it doesn't contain recompressors. I downloaded NitroSDK which does indeed have Huffman compressor, but it is producing a different result from the original when I attempt to repack.

If this is related to http://gbatemp.net/threads/emulator-that-supports-firmware-writing.356194/ did Crystaltile2 not do what you want?

Equally the way Huffman works is it scans the file to find the most common runs of hex and giving them lookups. If you change the file you change the distribution/most common runs and thus are not likely to get an identical one. Similarly depending upon the scan type/complexity it might not pick up all the same things.

As you asked for compression though http://gbatemp.net/threads/nintendo-ds-gba-compressors.313278/ is pretty much reference grade.

For the record though this is the only thing that even touches the firmware beyond dumping it and the names/birthdays/colours thing that Crystlatile2 and all the others do.

fwunpack

Well-Known Member

Got Wood?

Well-Known Member

Techromancer

Well-Known Member

Well-Known Member

Well-Known Member

Techromancer

Similar threads

Popular threads in this forum