Due to copyright laws, is proprietary code owned by Nintendo. This means it is illegal for websites to host the file for download, and it is not bundled with emulators. The legal way to obtain it is via dumping . This involves: Using a physical Nintendo DS or DS Lite.
His first attempt to open it with a standard hex editor failed. The program crashed, citing a "recursive pointer loop." His second attempt, using a low-level disk editor, succeeded only in showing him the first few kilobytes. They were repeating patterns. Geometries. Then, a line of plain ASCII that made the hair on his arms stand up. firmware.bin -nds firmware-
The text scrolled faster.
The DS firmware is not strictly region-locked for original DS games. A Japanese firmware will play a US cartridge. However, the system menu language and PictoChat will be in Japanese. Emulators usually ignore region for compatibility. Due to copyright laws, is proprietary code owned by Nintendo