This topic was archived here:

https://web.archive.org/web/20230000000000fw_/https://www.zenhax.com/viewtopic.php?t=14982

Habanero, posted Sun Mar 14, 2021 5:26 am (62838)

---

An old Nintendo DS game came out on PC recently, and I wanted to see if it's possible to do some basic modding or file extraction. The format is .pac, which appears to be a generic archive format that's used in Nintendo DS games, among others.

The file header says "DW_PACK", and Google shows me that a Neptunia game also used this format which was posted here before.

Here's the header.



Ideally I'd like to do stuff like palette swaps, etc., which would require repacking the .pac files. If that's possible (and/or if you know of a tool), lemme know.

Thanks.

https://mega.nz/folder/Z9g0EAyT#a98AfZ-NrJ1kmH51oaRWHg

Zolodei, posted Sun Mar 14, 2021 6:37 pm (62849)

---

The script gives an error, maybe the algorithm was changed

I pulled out one file, can anyone find the correct algorithm.

Coropata.rar

spiritovod, posted Sun Mar 14, 2021 9:49 pm (62851)

---

Resulted files are somehow encrypted anyway (maybe similar to Neptunia, but with different table). Here is fixed script for dumping files from pac.

Update: Thanks to aluigi it should work properly now.

coropata.bms

aluigi, posted Fri Mar 26, 2021 1:32 pm (63050)

---

The algorithm is neptunia0, so:
comtype neptunia -> comtype neptunia0

I updated the script.
In quickbms 0.11 neptunia0 will be called automatically if neptunia fails