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Dumping IS-NITRO-EMULATOR DS BIOS and Firmware

What you need

  • A IS-NITRO-EMULATOR
  • A Windows environment with the IS-NITRO-DEBUGGER software installed
  • dsbf_dump v1.3.0

Section I - Loading the dumper ROM

  1. Rename the dsbf_dump.nds you downloaded to dsbf_dump.srl.
  2. Connect the IS-NITRO-EMULATOR to Windows via USB and launch the IS-NITRO-DEBUGGER software.
  3. Go to File > Load File.

  1. Select SRL under Open File, click Browse and choose dsbf_dump.srl. Tick all 3 boxes, then press OK.

  1. Wait for the progress bars to complete. The DS should reboot into dsbf_dump.

Section II - Dumping debugger memory

  1. On the DS, press (A) on Please press the A button to continue as a dev-kit..
  2. Wait till the screen shows buffer at: 0x2xxxxxx. Note down the hexadecimal address.
  3. Press the pause button in the debugger toolbar.

  1. Go to File > Save File.

    • Click Browse and name the file fw.bin
    • Select ARM9 under Source Memory Area
    • In Start Address key in the address you noted down in step 2
    • For Length key in 0x100000

    Then press OK.

  1. Once the progress bar completes, press the soft run button in the debugger toolbar.

  1. On the DS, press (Start), and repeat steps 2 to 5, but name the file bios7.bin instead.
  2. On the DS, press (Start), and repeat steps 2 to 5, but name the file bios9.bin instead.
  3. On the DS, press (Start) twice to exit. You can press OK to the message on the debugger saying It is going to recover NITRO processor.

Section III - Trimming dumps

Windows

The following instructions use the HxD hex editor, but other hex editors can be used as well.

  1. Launch the HxD hex editor and open fw.bin.
  2. Select the first 0x100 bytes of DE, right click > Delete. Press OK to Do you want to proceed?.

  1. Scroll down to 0x40000, right click > Select block.

    • In Start-offset key in 40000
    • In End-offset key in 100000
    • Choose hex

    Then press OK.

  2. Right click the selected region > Delete, and press OK to Do you want to proceed?. Save the file.

  3. Repeat steps 1 to 4 for bios7.bin, but for Start-offset key in 4000 instead.

  4. Repeat steps 1 to 4 for bios9.bin, but for Start-offset key in 1000 instead.

  5. Copy fw.bin, bios7.bin and bios9.bin to a safe location on your computer.

Linux / macOS

  1. Open a terminal in the folder containing the 3 .bin files, and run the following commands:
mkdir out/
dd if=fw.bin of=out/fw.bin bs=1 skip=0x100 count=0x40000
dd if=bios7.bin of=out/bios7.bin bs=1 skip=0x100 count=0x4000
dd if=bios9.bin of=out/bios9.bin bs=1 skip=0x100 count=0x1000
  1. Go inside the out folder, and copy fw.bin, bios7.bin and bios9.bin to a safe location on your computer.