The NITRO SDK was previously known as the IRIS SDK, but got renamed sometime before April 2004 (release 1.0 of NITRO-SDK). Much of the structure and files remain from the IRIS SDK but most files have been renamed to NITRO.

Even although the SDK was renamed to NITRO in version 1.0 it still distributed the release notes for the three IRIS SDK versions that started the project. Although in the 4.2 SDK leak these were removed ands the release notes just start from 1.0.

When the Nintendo DSi was released the SDK was once again renamed to the twilight (TWL) SDK.

Leaked Versions of the SDK

Known Leaked versions:

• NITRO-SDK 3.0 (Unknown Leak)
• NITRO-SDK 4.2+ Patch (Pokemon Platinum Source code Leak)
• TWL-SDK 5.5 (Unknown Leak) - This is the DSi version of the SDK

Known Versions

These are the versions that have been known to exist and their release dates:

SDK Version Name	Release Date
irisSDK-snapshot-031203	3rd December 2003
irisSDK-snapshot-031212	12th December 2003
irisSDK-snapshot-040120	20th January 2004
NITRO-SDK 1.0	5th April 2004
NITRO-SDK 1.2	16th June 2004
NITRO-SDK 2.0	11th March 2005 (First in english)
NITRO-SDK 2.1	9th May 2005
NITRO-SDK 2.2	22nd August 2005
NITRO-SDK 3.0	25th January 2006
NITRO-SDK 3.1	2nd May 2006
NITRO-SDK 3.2	28th August 2006
NITRO-SDK 4.0	15th February 2007
NITRO-SDK 4.1	10th July 2007
NITRO-SDK 4.2	10th December 2007
NITRO-SDK 4.2 + Patch	18th January 2008
TWL-SDK 5.0	23rd October 2008
TWL-SDK 5.1	27th February 2009
TWL-SDK 5.2	10th June 2009
TWL-SDK 5.3	7th August 2009
TWL-SDK 5.4	20th November 2009
TWL-SDK 5.5	12th July 2010

All three IRIS SDK version were leaked as part of the Paladin Leak on the 30th September 2020.

Note that there was also something called the “TWLwrap SDK” for DSi that was leaked but it is very different to these so it presumably wasn’t a consumer SDK.

Root Files (/)

• Makefile
• Readme-NitroSDK-3_0-060125.txt
• SrcTreeMap.txt
• bin
• build
• cache
• components
• data
• docs - Documentation
• include - C/C++ Header files for SDK libraries
• lib - Static libraries for the SDK
• man - Manual for Functions
• tools - SDK Tools such as elftobin and makerom

---

Manual (/man)

Contents:

• a-z.html
• alphabet.html
• alphabet_index.html
• card
• categories.html
• changelog-oldver.html
• changelog.html
• changelog2.2branch.html
• cht
• contents.html
• cp
• css
• ctrdg
• demos
• env
• ext
• fs
• functions.html
• fx
• gx
• icons.html
• index.html
• information
• main.html
• math
• mb
• mi
• os
• pad
• prc
• romfiles
• rtc
• sdk_logo.gif
• snd
• spi
• std
• svc
• tools
• wbt
• wm
• wm_changes_041006.txt
• wvr

---

Tools (/tools)

Contents:

• bin
• elftobin
• lib
• makerom

---

Pre-compiled Header Cache (/cache)

The Cache folder only contains one file:

• ./cache/include/Don’tDeleteMe.txt

---

Bin (/bin)

Contents:

• ./bin/ARM9-TS/Release/mb_child_simple.srl
• ./bin/ARM9-TS/Rom/mb_child.srl
• ./bin/ARM9-TS/Rom/WMTestTool.srl
• ./bin/ARM9-TS/Rom/mb_child_simple.srl

---

C/C++ Header files (/include)

the table below lists all the C++ header files available to use when developing Nintendo DS games.

Name	Description
nitro_win32.h
nitro_sp.h
nitro_wl
nitro_wl/common
nitro_wl/common/version_wl.h
nitro.h
nitro
nitro/gx.h
nitro/init
nitro/init/crt0.h
nitro/env.h
nitro/wvr
nitro/wvr/common
nitro/wvr/common/wvr_common.h
nitro/wvr/ARM9
nitro/wvr/ARM9/wvr.h
nitro/cht
nitro/cht/ARM9
nitro/cht/ARM9/pictocatch.h
nitro/version.h
nitro/parent_begin.h
nitro/mi.h
nitro/dtcm_begin.h
nitro/card
nitro/card/eeprom.h
nitro/card/rom.h
nitro/card/backup.h
nitro/card/pullOut.h
nitro/card/common.h
nitro/card/fram.h
nitro/card/flash.h
nitro/snd.h
nitro/wvr.h
nitro/exi.h
nitro/hw
nitro/hw/common
nitro/hw/common/mmap_shared.h
nitro/hw/common/lcd.h
nitro/hw/common/armArch.h

---

ARM7 Headers

The table below lists the relevant entries.

Name	Description
nitro/hw/ARM7/ioreg_PAD.h
nitro/hw/ARM7/mmap_global.h
nitro/hw/ARM7/ioreg_OS.h
nitro/hw/ARM7/ioreg.h
nitro/hw/ARM7/mmap_wram.h
nitro/hw/ARM7/mmap_main.h
nitro/hw/ARM7/ioreg_MI.h
nitro/hw/ARM7/ioreg_PXI.h
nitro/hw/ARM7/ioreg_SND.h
nitro/hw/ARM7/ioreg_EXI.h
nitro/hw/ARM7/ioreg_GX.h
nitro/hw/ARM7/ioreg_SPI.h

ARM9 Headers

The table below lists the relevant entries.

Name	Description
nitro/hw/ARM9/ioreg_PAD.h
nitro/hw/ARM9/ioreg_G3X.h
nitro/hw/ARM9/mmap_global.h
nitro/hw/ARM9/ioreg_G3.h
nitro/hw/ARM9/ioreg_OS.h
nitro/hw/ARM9/ioreg.h
nitro/hw/ARM9/mmap_main.h
nitro/hw/ARM9/ioreg_MI.h
nitro/hw/ARM9/ioreg_PXI.h
nitro/hw/ARM9/mmap_vram.h
nitro/hw/ARM9/ioreg_EXI.h
nitro/hw/ARM9/ioreg_GX.h
nitro/hw/ARM9/ioreg_GXS.h
nitro/hw/ARM9/mmap_tcm.h
nitro/hw/ARM9/ioreg_CP.h
nitro/hw/ARM9/ioreg_G2.h
nitro/hw/ARM9/ioreg_G2S.h

Memory Interface (MI)

The memory interface includes were used to produce functions for accessing specific areas of the hardwares memory and were located in the nitro/mi folder.

Name	Description
nitro/mi/wram.h
nitro/mi/dma.h
nitro/mi/card.h
nitro/mi/uncomp_stream.h
nitro/mi/byteAccess.h
nitro/mi/swap.h
nitro/mi/stream.h
nitro/mi/compress.h
nitro/mi/memory.h
nitro/mi/uncompress.h
nitro/mi/init.h
nitro/mi/exMemory.h

Misc Headers

The table below lists the relevant entries.

Name | Description —|— nitro/itcm_begin.h | nitro/pxi.h | nitro/wbt.h | nitro/pxi | nitro/pxi/common | nitro/pxi/common/fifo.h | nitro/pxi/common/regname.h | nitro/pxi/common/compparam.h | nitro/pxi/common/init.h | nitro/card.h | nitro/itcm_end.h | nitro/code32.h | nitro/types.h | nitro/misc.h | nitro/ioreg.h | nitro/specfiles | nitro/specfiles/ARM7-TEG.lcf | nitro/specfiles/ROM-TS.rsf | nitro/specfiles/ARM9-TS-cloneboot-C.lcf.template | nitro/specfiles/ARM9-TS.lsf | nitro/specfiles/ARM9-TEG.lsf | nitro/specfiles/ARM9-TEG-C.lcf.template | nitro/specfiles/ARM7-TS.lsf | nitro/specfiles/ARM9-TEG.lcf | nitro/specfiles/ARM9-TEG.lcf.template | nitro/specfiles/ARM9-TS.lcf | nitro/specfiles/ARM7-TS.lcf.template | nitro/specfiles/ARM7-TS.lcf | nitro/specfiles/ARM9-TS-C.lcf.template | nitro/specfiles/ndsld.response.template | nitro/specfiles/default.bnr | nitro/specfiles/mwldarm.response.template | nitro/specfiles/ARM7-TEG.lsf | nitro/specfiles/ARM9-TS.lcf.template | nitro/specfiles/2.x | nitro/specfiles/2.x/ARM9-TS-cloneboot-C.lcf.template | nitro/specfiles/2.x/ARM9-TEG-C.lcf.template | nitro/specfiles/2.x/ARM9-TEG.lcf.template | nitro/specfiles/2.x/ARM9-TS-C.lcf.template | nitro/specfiles/2.x/ARM9-TS.lcf.template | nitro/specfiles/ARM7-TEG.lcf.template | nitro/specfiles/ROM-TEG.rsf | nitro/dtcm_end.h | nitro/fx | nitro/fx/fx.h | nitro/fx/fx_mtx33.h | nitro/fx/fx_trig.h | nitro/fx/fx_mtx22.h | nitro/fx/fx_mtx43.h | nitro/fx/fx_cp.h | nitro/fx/fx_mtx44.h | nitro/fx/fx_mtx.h | nitro/fx/fx_const.h | nitro/fx/fx_vec.h | nitro/exi | nitro/exi/ARM7 | nitro/exi/ARM7/genPort.h | nitro/os.h | nitro/utest.h | nitro/parent_end.h | nitro/ext | nitro/ext/ext_scrntest.h | nitro/ext/ext_keycontrol.h | nitro/pad.h | nitro/cht.h | nitro/codereset.h | nitro/wm | nitro/wm/common | nitro/wm/common/wm.h | nitro/wm/ARM9 | nitro/wm/ARM9/wm_api.h | nitro/memorymap_sp.h | nitro/std | nitro/std/string.h | nitro/section.h | nitro/prc.h | nitro/version_end.h | nitro/ctrdg.h | nitro/math | nitro/math/fft.h | nitro/math/dgt.h | nitro/math/crc.h | nitro/math/rand.h | nitro/math/math.h | nitro/math/qsort.h | nitro/math/checksum.h | nitro/pad | nitro/pad/common | nitro/pad/common/pad.h | nitro/pad/ARM7 | nitro/pad/ARM7/xyButton.h | nitro/env | nitro/env/env_system.h nitro/spec.h nitro/version_begin.h nitro/components nitro/spi nitro/spi/common nitro/spi/common/type.h nitro/spi/common/userInfo_teg.h nitro/spi/common/config.h nitro/spi/common/pm_common.h nitro/spi/common/userInfo_ts_300.h nitro/spi/common/userInfo_ts_0.h nitro/spi/common/userInfo_ts_200.h nitro/spi/ARM7 nitro/spi/ARM7/pm.h nitro/spi/ARM7/spi.h nitro/spi/ARM9 nitro/spi/ARM9/pm.h nitro/spi/ARM9/mic.h nitro/spi/ARM9/tp.h nitro/memorymap.h nitro/wram_end.h nitro/cp.h nitro/mb nitro/mb/mb_child.h nitro/mb/mb_gameinfo.h nitro/mb/mb.h nitro/mb/mb_fake_child.h nitro/wram_begin.h nitro/rtc nitro/rtc/common nitro/rtc/common/type.h nitro/rtc/common/fifo.h nitro/rtc/ARM9 nitro/rtc/ARM9/api.h nitro/rtc/ARM9/convert.h nitro/rtc.h nitro/spi.h nitro/gx nitro/gx/gx.h nitro/gx/struct_2d.h nitro/gx/g3c.h nitro/gx/g3x.h nitro/gx/g3.h nitro/gx/gx_sp.h nitro/gx/g2_oam.h nitro/gx/gxcommon.h nitro/gx/gx_vramcnt.h nitro/gx/g2.h nitro/gx/gx_load.h nitro/gx/g3imm.h nitro/gx/g3_util.h nitro/gx/gx_capture.h nitro/gx/g3b.h nitro/gx/gx_bgcnt.h nitro/prc nitro/prc/resample.h nitro/prc/types.h nitro/prc/algo_superfine.h nitro/prc/algo_common.h nitro/prc/common.h nitro/prc/algo_standard.h nitro/prc/algo_light.h nitro/prc/algo_fine.h nitro/math.h nitro/snd nitro/snd/common nitro/snd/common/main.h nitro/snd/common/capture.h nitro/snd/common/channel.h nitro/snd/common/seq.h nitro/snd/common/alarm.h nitro/snd/common/midiplayer.h nitro/snd/common/work.h nitro/snd/common/data.h nitro/snd/common/global.h nitro/snd/common/mml.h nitro/snd/common/exchannel.h nitro/snd/common/util.h nitro/snd/common/command.h nitro/snd/common/bank.h nitro/snd/ARM9 nitro/snd/ARM9/interface.h nitro/os nitro/os/common nitro/os/common/callTrace.h nitro/os/common/spinLock.h nitro/os/common/profile.h nitro/os/common/alarm.h nitro/os/common/tick.h nitro/os/common/valarm.h nitro/os/common/context.h nitro/os/common/message.h nitro/os/common/ownerInfo.h nitro/os/common/entropy.h nitro/os/common/emulator.h nitro/os/common/systemCall.h nitro/os/common/timer.h nitro/os/common/thread.h nitro/os/common/printf.h nitro/os/common/interrupt.h nitro/os/common/system.h nitro/os/common/mutex.h nitro/os/common/init.h nitro/os/common/exception.h nitro/os/common/arena.h nitro/os/common/reset.h nitro/os/common/alloc.h nitro/os/common/functionCost.h nitro/os/ARM9 nitro/os/ARM9/argument.h nitro/os/ARM9/protectionUnit.h nitro/os/ARM9/vramExclusive.h nitro/os/ARM9/cache.h nitro/os/ARM9/protectionRegion.h nitro/os/ARM9/china.h nitro/os/ARM9/tcm.h nitro/dgt nitro/dgt/dgt.h nitro/dgt/common.h nitro/cp nitro/cp/sqrt.h nitro/cp/context.h nitro/cp/divider.h nitro/os_sp.h nitro/ext.h nitro/snd_sp.h nitro/fs nitro/fs/archive.h nitro/fs/file.h nitro/fs/overlay.h nitro/mb.h nitro/wm.h nitro/ctrdg nitro/ctrdg/common nitro/ctrdg/common/ctrdg_common.h nitro/sinit.h nitro/fs.h nitro/code16.h nitro/std.h

---

Documentation (/docs)

Contents:

• README
• SDKHowTo
• SDKRules
• SDKTools
• TechnicalNotes

SDK How Tos (/docs/SDKHowTo)

• SDKHowTo/HowToMakeMyVRamBankType.txt
• SDKHowTo/HowToBuildSDKTree.pdf
• SDKHowTo/HowToJoinAGBDevEnv.txt

SDK Rules (/docs/SDKRules)

• SDKRules/Rule-Defines.html
• SDKRules/NitroSDKStandard.css
• SDKRules/Rule-NameSpace.html

READMEs (/docs/README)

• README/ReleaseNotes-3.0.pdf
• README/history/ReleaseNotes-2.2.pdf
• README/history/ReleaseNotes-2.0.pdf
• README/history/ReleaseNotes-2.1.pdf
• README/history/ReleaseNotes-031212.pdf
• README/history/ReleaseNotes-1.2.pdf
• README/history/ReleaseNotes-031203.pdf
• README/history/ReleaseNotes-1.0.pdf
• README/history/ReleaseNotes-040120.pdf
• README/QuickStartForSDK.pdf

Technical Notes (/docs/TechnicalNotes)

• TechnicalNotes/AboutWirelessManager.pdf
• TechnicalNotes/AboutSound.pdf
• TechnicalNotes/AboutPatternRecognition.pdf
• TechnicalNotes/NitroRomFormat.pdf
• TechnicalNotes/AboutFileSystem.pdf
• TechnicalNotes/WmTutorial.pdf
• TechnicalNotes/AboutMultiBoot.pdf
• TechnicalNotes/AboutThreadInfo.pdf
• TechnicalNotes/AboutComponents.pdf
• TechnicalNotes/MechanismOfProfiler.pdf
• SDKTools
• SDKTools/CygwinPackageList.pdf

---

Components (/components)

Contents:

• ichneumon
• mongoose
• racoon (DSi)
• ferret (DSi)

---

Static Libraries (/lib)

the table below lists all the Static Libraries that a Nintendo DS game can link to to provide useful functionality. There are normally two versions of a static Library, one compiled with the standard toolchain and another compiled for Thumb.

Name	Thumb	Description
libsyscall.a	N/A
crt0.o	N/A
libcard.a	libcard.thumb.a
libcht.a	libcht.thumb.a
libcp.a	libcp.thumb.a
libctrdg.a	libctrdg.thumb.a
libdgt.a	libdgt.thumb.a
libe3s.a	libe3s.thumb.a
libenv.a	libenv.thumb.a
libext.a	libext.thumb.a
libfs.a	libfs.thumb.a
libfx.a	libfx.thumb.a
libgx.a	libgx.thumb.a
libmath.a	libmath.thumb.a
libmb.a	libmb.thumb.a
libmi.a	libmi.thumb.a
libos.CALLTRACE.a	libos.CALLTRACE.thumb.a
libos.FUNCTIONCOST.a	ibos.FUNCTIONCOST.thumb.a
libos.a	libos.thumb.a
libos_TS0.a	libos_TS0.thumb.a
libos_TS100.a	libos_TS100.thumb.a
libos_TS200.a	libos_TS200.thumb.a
libprc.a	libprc.thumb.a
libpxi.a	libpxi.thumb.a
librtc.a	librtc.thumb.a
libsnd.a	libsnd.thumb.a
libspi.a	libspi.thumb.a
libspi_TS0.a	libspi_TS0.thumb.a
libspi_TS100.a	libspi_TS100.thumb.a
libspi_TS200.a	libspi_TS200.thumb.a
libstd.a	libstd.thumb.a
libstubscw.a	libstubscw.thumb.a
libstubsisd.a	libstubsisd.thumb.a
libutest.a	libutest.thumb.a
libwbt.a	libwbt.thumb.a
libwfs.a	libwfs.thumb.a
libwm.a	libwm.thumb.a
libwvr.a	libwvr.thumb.a

---

Source Code (/build)

Contents:

• Makefile
• buildsetup
• buildtools
• demos
• libraries
• tools

---

Data (/data)

Contents:

• cht_data
• for_china
• wl_icons