---
layout: devinfo
app: TwlSystemUpdater
---
<i>Some screenshots and information are from <a href="https://wiki.raregamingdump.ca/index.php/SystemUpdater">Rare Gaming Dump.</a></i>
<br><br>
Twl SystemUpdater is a tool used to update DSi development hardware such as the IS-TWL-DEBUGGER or a panda. This does not work on retail units, causing the same <code>-2011</code> error as <a href="/dsidev/twlnmenu.html">TwlNmenu</a> and bricking the console.
<br><br>
<h2>TADs in NitroFS</h2>
Twl SystemUpdater works by loading a set of firmware TADs and <a href="https://dsibrew.org/wiki/Nand:/shared1/TWLCFG0.dat">TWLCFG0.dat</a>/<a href="https://dsibrew.org/wiki/Nand:/shared1/TWLCFG1.dat">TWLCFG1.dat</a> from NitroFS to install onto the target hardware. The updaters are multi-region, so each one contains full sets of firmware TADs for every region. The TADs are sorted into three main folders.
<br><br>
<b><code>NitroFS:/data/debugger/</code></b><br>
These TADs are for the IS-TWL-DEBUGGER.<br>
<code> - HNAx</code>, Home menu<br>
<code> - HNBx</code>, System settings (this was removed in v1.2 of the SystemUpdater)<br><br>
<b><code>NitroFS:/data/standalone/</code></b><br>
These TADs are for the DSi panda unit.<br>
<code> - HNAx</code>, Home menu<br>
<code> - HNBx</code>, System settings (this was removed in v1.2 of the SystemUpdater)<br><br>
<b><code>NitroFS:/data/common/</code></b><br>
These are TADs that are common between both the IS-TWL-DEBUGGER and panda units.<br>
<code> - HNIx</code>, Nintendo DSi Camera<br>
<code> - HNKx</code>, Nintendo DSi Sound<br>
<code> - HNLx</code>, Version Data<br>
<code> - HNCx</code>, WiFi Firmware<br>
<code> - HNDx</code>, DS Download Play<br>
<code> - HNEx</code>, PictoChat<br>
<code> - HNHx</code>, Nintendo DS Cart Whitelist<br>
<code> - <a href="/dsidev/nandfiler.html">NandFiler</a></code> (optional install)<br>
<code> - <a href="/dsidev/twlnmenu.html">TwlNmenu</a></code> (optional install)<br><br>
The SystemUpdater chooses whether to install from the <code>debugger</code>or <code>standalone</code> folder based off of the RAM size. 16 MB is TWL CONSOLE (panda and IS-TWL-CAPTURE), while 32 MB is IS_TWL_DEBUGGER.<br><i> - Source: <a href="https://wiki.raregamingdump.ca/index.php/SystemUpdater">RGD</a></i>
<br><br>
All the TAD files in NitroFS have been created with <code>maketad_updater</code>, a modified version of <a href="/dsidev/man/maketad.html" target="_blank">maketad</a>. This uses a different key to encrypt the TADs (normally the Wii dev key is used), so the only way to get the decrypted SRLs is by running the SystemUpdater and then extracting the contents from NAND.<br><br>
<h2>Additional ".nand" file</h2>
There another file in NitroFS called <code>menu_launcher.nand</code> (found in <code>NitroFS/data/common/</code>). Judging from the menu-launcher source code in TwlIPL (TwlIPL/trunk/build/nandfirm/menu-launcher/), this appears to be the <a href="https://dsibrew.org/wiki/Stage2">stage2 bootloader</a>. The <code>.nand</code> file has a version number at the bottom showing that it is SDK 2435, IPL 8325. This is the same as every retail DSi.<br><br>
<h2>Changelog</h2>
This is from an official readme included with the Twl SystemUpdater. You can read the full version <a href="man/twlsystemupdater.html" target="_blank">here</a>.
<table class="history twl">
	<tr>
		<th class="twl">Revision Date</th>
		<th class="twl">Version</th>
		<th class="twl">Updated Content</th>
	</tr>
	<tr>
		<td class="date twl">2010/03/04</td>
		<td class="version twl">1.4a</td>
		<td class="twl">
			<CODE>TwlNmenu</CODE> and <CODE>NandFiler</CODE> were updated to the version included in TWL-SDK 5.4.<br>［Korean version only] DSi camera was updated.<br>［Korean version only] Updated version data to Ver 1.4.1K_dev.<br>［Chinese version only] Updated version data to Ver 1.4.1C_dev.
		</td>
	</tr>
	<tr>
		<td class="date twl">2009/08/17</td>
		<td class="version twl">1.4</td>
		<td class="twl">
			Added support for DSi Menu version 1.4. Updated <CODE>TwlNmenu</CODE> and <CODE>NandFiler</CODE> to versions bundled with TWL-SDK 5.3. Added China and Korea to the selectable regions.
		</td>
	</tr>
	<tr>
		<td class="date twl">2009/06/30</td>
		<td class="version twl">1.3a</td>
		<td class="twl">Added an option to update without installing <CODE>TwlNmenu</CODE> or <CODE>NandFiler</CODE>.</td>
	</tr>
	<tr>
		<td class="date twl">2009/04/28</td>
		<td class="version twl">1.3</td>
		<td class="twl">Added support for DSi Menu version 1.3. Updated <CODE>TwlNmenu</CODE> and <CODE>NandFiler</CODE> to versions bundled with TWL-SDK 5.1 patch 4.</td>
	</tr>
	<tr>
		<td class="date twl">2009/01/15</td>
		<td class="version twl">1.2</td>
		<td class="twl">Added support for DSi Menu version 1.2. Updated <CODE>TwlNmenu</CODE> and <CODE>NandFiler</CODE> to versions bundled with TWL-SDK 5.1 PR2.</td>
	</tr>
	<tr>
		<td class="date twl">2008/11/13</td>
		<td class="version twl">1.0c</td>
		<td class="twl">DSi Camera, DSi Sound, and the TWL-SDK tools <CODE>TwlNmenu</CODE> and <CODE>NandFiler</CODE> are now all installed by default.</td>
	</tr>
	<tr>
		<td class="date twl">2008/10/08</td>
		<td class="version twl">1.0b</td>
		<td class="twl">Added support for DSi Menu version 1.0.</td>
	</tr>
</table>
<div style="text-align:center;"><h1>Screenshots:</h1></div>
        <div class="screenshot">
        <img src="{{ site.imgdir }}{{ page.app }}/screenshots/region_select.png">
        <img src="{{ site.imgdir }}{{ page.app }}/screenshots/updating.png">
        <img src="{{ site.imgdir }}{{ page.app }}/screenshots/update_success.png">
        <img src="{{ site.imgdir }}{{ page.app }}/screenshots/update_fail.png"></div>