The Ultimate Guide to NDS Decompilers: Tools and Techniques for DS Reverse Engineering
If you need to "decompile" the physical device (disassembly), you will need specific precision tools for the proprietary screws: Tri-Wing Precision Screwdriver nds decompiler
You're looking for information on developing a decompiler for the Nintendo DS (NDS) console. A decompiler is a tool that takes compiled machine code and converts it back into a higher-level programming language, such as C or assembly code. The Ultimate Guide to NDS Decompilers: Tools and
ndsld linker script or manually define sections.