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 # NDSFactory
-Unpack & Repack Nintendo DS Roms (.nds)
+[![Open Source Love](https://badges.frapsoft.com/os/v1/open-source.svg?v=103)](https://github.com/ellerbrock/open-source-badges/)
+[![GPL Licence](https://badges.frapsoft.com/os/gpl/gpl.png?v=103)](https://opensource.org/licenses/GPL-3.0/)
+
+
+A tool to unpack & repack Nintendo DS roms (.nds)
+
+
+If you find this software useful, please [![ko-fi](https://www.ko-fi.com/img/githubbutton_sm.svg)](https://ko-fi.com/Z8Z511SOI)
+
+![screenshot]()
+
+**!!!ROM WITH OVERLAY ARE CURRENTLY NOT SUPPORTED!!!**
+
+# Description
+
+This software will help you to easily unpack and repack Nintendo DS roms, but **IT REQUIRES SOME KNOWLEDGE!**
+
+Basically an NDS software is composed of the following sections:
+* Header
+* ARM9 Binary
+* ARM7 Binary
+* FNT (Filename Table)
+* FAT (File Allocation Table)
+* ARM9/ARM7 Overlay (Optional)
+* ARM9/ARM7 Overlay Files (Optional)
+* Icon/Title Logo
+* FAT Files (The actual files used by the software, like Graphics, Music etc.)
+
+With NDSFactory you can extract these sections, modify them using your prefered way and the rebuild the rom with your edited sections.
+If the modified sections are bigger than the original ones, you can specify their new physical adddress and size in the header: if so, **make
+sure that they DON'T OVERLAP, and remember to PATCH THE FAT.BIN** (more on this later).
+
+**This software will be particularly useful if you want to mod your games or write a trainer for them.**
+
+# How to use it
+
+## Unpacker Tab
+In the upacker tab you can load your Nintendo DS software (.nds) and then you can extract the rom sections.
+Please note the Original Address of the FAT Files, you will need this value later if you are going to alter the addresses and size of the sections.
+
+**You can then do what you want with these sections (inject code, apply patches etc.)**
+
+## Packer Tab
+In the packer tab you can re-create an .nds file using your edited sections. If your sections are bigger than the originals, you have to edit their addresses and size (in the header). **Make sure that the addresses don't overlap, or the final rom will be broken**. If you are repacking edited sections, and the FAT Files Address is different than the original one, **make sure to patch the FAT (fat.bin)**: the FAT is a list of absolute addresses (representing each file start adddress and end andress), so you need to update them (you can easily do this using the FAT Patching Tab).
+
+## Fat Patching Tab
+In this tab you can easily patch the FAT section (fat.bin). You have to do this only if the FAT Files (fat_data.bin) final address is different than the original one.
+Patching the FAT is easy, all you have to do is load your fat.bin, and fill the original address and the new address of fat_data.bin. This will produce a patched fat.bin that
+you can use in the packing process.
+
+
+# Know Limitations/Possible Future Featurs/Bugs
+
+* Add support for roms with OVERLAY
+* Add support to decode FAT Files (extract single files one by one)
+* Add support to rebuild a new fat_data.bin and fat.bin from a set of files inside a directory
+* Design a nice logo/icon
+
+If you found a bug, feel free to open an issue or send a PR :)
+
+### Developed with ❤ by Luca D'Amico - Special thanks to Antonio Barba & Davide Trogu
+
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