Technical notes
Citra fork for Android, shipped as four APKs of the same build per release:
the org.citra.emu package, a com.antutu.ABenchMark package, and a
StorageAccess variant of each. The user directory is citra-emu at the root of
external storage, and Android/data/org.citra.emu/files/citra-emu for the
StorageAccess builds. External files live in sysdata/ and nand/ below it.
ref: src/android/app/src/main/java/org/citra/emu/utils/CitraDirectory.java:61-94,
src/common/common_paths.h:23-29, src/common/file_util.cpp:398-430
InitKeys reads boot9.bin, then the native firm titles in the NAND tree, then
sector0x96.bin for the New 3DS firm, then aes_keys.txt. Content left
encrypted stops loading with ErrorEncrypted, shown as "ROM Encrypted".
ref: src/core/hw/aes/key.cpp:497-508, src/core/file_sys/ncch_container.cpp:348-351,
src/android/jni/main_android.cpp:88-90
GetSharedFont tries the shared font system archive, then shared_font.bin,
then the regional BCFNT for the CFG region, and ends the session with
ErrorSystemFiles when the three fail. The embedded open-source font answers
title low ID 0x00014002 only, so CHN, KOR and TWN, which resolve to
0x00014102, 0x00014202 and 0x00014302, depend on a file. Region defaults to
the code the ROM declares.
ref: src/core/hle/service/apt/apt.cpp:143, src/core/hle/service/apt/apt.cpp:256-272,
src/core/file_sys/archive_ncch.cpp:143-148, src/core/hle/service/cfg/cfg.cpp:176-181,
src/core/loader/ncch.cpp:179, src/android/jni/config/main_settings.cpp:12
Loading the four regional fonts from sysdata is specific to this fork.
ref: src/core/hle/service/apt/apt.cpp:184-228
The APK assets carry those fonts, three system archives, the DLP module and a
seeded CFG savegame, and the first run copies them into the user directory
without overwriting what is already there. System archives ship as split-off
RomFS, picked up beside the .app path the title tree resolves to.
ref: src/android/app/src/main/java/org/citra/emu/utils/CitraDirectory.java:192-207,
src/android/app/src/main/java/org/citra/emu/utils/CitraDirectory.java:368-399,
src/core/file_sys/ncch_container.cpp:726-741
LLE is opt-in per service module and reads the module from the NAND title
tree, falling back to HLE when it is absent. There is no title downloader:
system titles come from CIA files the user installs.
ref: src/core/hle/service/service.cpp:60-107, src/core/hle/service/service.cpp:197-213,
src/android/jni/main_android.cpp:278-289
ClCertA is read from NAND title 0x0004001b00010002 and decrypted with the
keyslot 0x0D normal key. HTTPS client authentication stays off without both.
ref: src/core/hle/service/http_c.cpp:810-884
The published tree does not build as it stands: CitraDirectory.java:349 calls
a NativeLibrary.SetBackgroundGLSL that no file declares, and GetBuildDate and
GetDeviceIinfo are declared native with no JNI counterpart. Nothing compiled
here reads the post-processing shaders the settings screen lists.
ref: src/android/app/src/main/java/org/citra/emu/NativeLibrary.java:341-342,
src/android/app/src/main/java/org/citra/emu/settings/SettingsFragment.java:397-401
Amiibo dumps are read as .bin files from amiibo/, cheat codes from
cheats/
.txt, texture packs and mods from load/.
ref: src/android/app/src/main/java/org/citra/emu/ui/AmiiboDialog.java:57-64,
src/core/cheats/cheats.cpp:93-110, src/core/custom_tex_cache.cpp:67,
src/core/file_sys/ncch_container.cpp:359-365</p>
</details>
<p><strong>18 files</strong> | 0 required, 18 optional | 18 in repo, 0 missing | 8 with HLE fallback</p>
<div class="rb-file-entry rb-file-entry-optional">
<p><strong><code>boot9.bin</code></strong> <span class="rb-badge rb-badge-muted">optional</span> <span class="rb-badge rb-badge-success">in repo</span>
<br>ARM9 bootrom</p>
<ul>
<li>Path: <code>sysdata/boot9.bin</code></li>
<li>System: <a href="../../systems/nintendo/#3ds">nintendo-3ds</a></li>
<li>Size: 64.0 KB</li>
<li>Validation: size</li>
<li>Source: <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/hw/aes/key.cpp#L135-L205"><code>src/core/hw/aes/key.cpp:135-205</code></a>, <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/hw/rsa/rsa.cpp#L49-L80"><code>src/core/hw/rsa/rsa.cpp:49-80</code></a></li>
<li>AES key section read at offset 55760, RSA modulus and exponent at 0xB3E0 and 0xB4E0. Both readers bail on any other size.</li>
</ul>
</div>
<div class="rb-file-entry rb-file-entry-optional">
<p><strong><code>aes_keys.txt</code></strong> <span class="rb-badge rb-badge-muted">optional</span> <span class="rb-badge rb-badge-success">in repo</span>
<br>AES key slots</p>
<ul>
<li>Path: <code>sysdata/aes_keys.txt</code></li>
<li>System: <a href="../../systems/nintendo/#3ds">nintendo-3ds</a></li>
<li>Source: <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/hw/aes/key.cpp#L428-L493"><code>src/core/hw/aes/key.cpp:428-493</code></a>, <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/hw/aes/key.cpp#L497-L508"><code>src/core/hw/aes/key.cpp:497-508</code></a></li>
<li>Platforms: <a href="../../platforms/bizhawk/">bizhawk</a>, <a href="../../platforms/emudeck/">emudeck</a>, <a href="../../platforms/retrodeck/">retrodeck</a></li>
<li>One name=hex pair per line, slot0x<NN>Key<X|Y|N> and common<N>. Read last, so it overrides what boot9.bin and the native firm titles set.</li>
</ul>
</div>
<div class="rb-file-entry rb-file-entry-optional">
<p><strong><code>sector0x96.bin</code></strong> <span class="rb-badge rb-badge-muted">optional</span> <span class="rb-badge rb-badge-success">in repo</span>
<br>New 3DS NAND secret sector</p>
<ul>
<li>Path: <code>sysdata/sector0x96.bin</code></li>
<li>System: <a href="../../systems/nintendo/#3ds">nintendo-3ds</a></li>
<li>Size: min 17 B</li>
<li>Validation: size</li>
<li>Source: <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/hw/aes/key.cpp#L309-L345"><code>src/core/hw/aes/key.cpp:309-345</code></a>, <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/hw/aes/key.cpp#L380-L386"><code>src/core/hw/aes/key.cpp:380-386</code></a>, <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/common/assert.h#L30-L35"><code>src/common/assert.h:30-35</code></a>, <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/common/assert.h#L59-L62"><code>src/common/assert.h:59-62</code></a></li>
<li>First 16 bytes decrypt the slot 0x15 KeyX of the New 3DS safe mode native firm, title 0x0004013820000003. A file of 16 bytes or less trips a live assert: Android compiles out ASSERT_MSG, not ASSERT.</li>
</ul>
</div>
<div class="rb-file-entry rb-file-entry-optional">
<p><strong><code>seeddb.bin</code></strong> <span class="rb-badge rb-badge-muted">optional</span> <span class="rb-badge rb-badge-success">in repo</span>
<br>game seed database</p>
<ul>
<li>Path: <code>sysdata/seeddb.bin</code></li>
<li>System: <a href="../../systems/nintendo/#3ds">nintendo-3ds</a></li>
<li>Source: <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/file_sys/seed_db.cpp#L12-L57"><code>src/core/file_sys/seed_db.cpp:12-57</code></a></li>
<li>Platforms: <a href="../../platforms/bizhawk/">bizhawk</a></li>
<li>Seed-encrypted titles from firmware 9.6 onwards. An empty database is written when the file is absent.</li>
</ul>
</div>
<div class="rb-file-entry rb-file-entry-optional">
<p><strong><code>00000000.app.romfs</code></strong> <span class="rb-badge rb-badge-muted">optional</span> <span class="rb-badge rb-badge-success">in repo</span> <span class="rb-badge rb-badge-info">HLE fallback</span> <span class="rb-badge rb-badge-muted">japan, north-america, europe, australia</span>
<br>shared font system archive, title 0x0004009b00014002</p>
<ul>
<li>Path: <code>nand/00000000000000000000000000000000/title/0004009b/00014002/content/00000000.app.romfs</code></li>
<li>System: <a href="../../systems/nintendo/#3ds">nintendo-3ds</a></li>
<li>Source: <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/hle/service/apt/apt.cpp#L124-L182"><code>src/core/hle/service/apt/apt.cpp:124-182</code></a>, <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/file_sys/archive_ncch.cpp#L143-L148"><code>src/core/file_sys/archive_ncch.cpp:143-148</code></a></li>
<li>First step of the shared font chain, holding cbf_std.bcfnt.lz in its RomFS. This title low ID is the one the embedded open-source font answers.</li>
</ul>
</div>
<div class="rb-file-entry rb-file-entry-optional">
<p><strong><code>00000000.app.romfs</code></strong> <span class="rb-badge rb-badge-muted">optional</span> <span class="rb-badge rb-badge-success">in repo</span> <span class="rb-badge rb-badge-muted">china</span>
<br>shared font system archive for CHN, title 0x0004009b00014102</p>
<ul>
<li>Path: <code>nand/00000000000000000000000000000000/title/0004009b/00014102/content/00000000.app.romfs</code></li>
<li>System: <a href="../../systems/nintendo/#3ds">nintendo-3ds</a></li>
<li>Source: <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/hle/service/apt/apt.cpp#L124-L182"><code>src/core/hle/service/apt/apt.cpp:124-182</code></a>, <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/file_sys/archive_ncch.cpp#L132-L158"><code>src/core/file_sys/archive_ncch.cpp:132-158</code></a></li>
<li>Holds cbf_zh-Hans-CN.bcfnt.lz. No embedded replacement answers this title low ID.</li>
</ul>
</div>
<div class="rb-file-entry rb-file-entry-optional">
<p><strong><code>00000000.app.romfs</code></strong> <span class="rb-badge rb-badge-muted">optional</span> <span class="rb-badge rb-badge-success">in repo</span> <span class="rb-badge rb-badge-muted">south-korea</span>
<br>shared font system archive for KOR, title 0x0004009b00014202</p>
<ul>
<li>Path: <code>nand/00000000000000000000000000000000/title/0004009b/00014202/content/00000000.app.romfs</code></li>
<li>System: <a href="../../systems/nintendo/#3ds">nintendo-3ds</a></li>
<li>Source: <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/hle/service/apt/apt.cpp#L124-L182"><code>src/core/hle/service/apt/apt.cpp:124-182</code></a>, <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/file_sys/archive_ncch.cpp#L132-L158"><code>src/core/file_sys/archive_ncch.cpp:132-158</code></a></li>
<li>Holds cbf_ko-Hang-KR.bcfnt.lz. No embedded replacement answers this title low ID.</li>
</ul>
</div>
<div class="rb-file-entry rb-file-entry-optional">
<p><strong><code>00000000.app.romfs</code></strong> <span class="rb-badge rb-badge-muted">optional</span> <span class="rb-badge rb-badge-success">in repo</span> <span class="rb-badge rb-badge-muted">taiwan</span>
<br>shared font system archive for TWN, title 0x0004009b00014302</p>
<ul>
<li>Path: <code>nand/00000000000000000000000000000000/title/0004009b/00014302/content/00000000.app.romfs</code></li>
<li>System: <a href="../../systems/nintendo/#3ds">nintendo-3ds</a></li>
<li>Source: <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/hle/service/apt/apt.cpp#L124-L182"><code>src/core/hle/service/apt/apt.cpp:124-182</code></a>, <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/file_sys/archive_ncch.cpp#L132-L158"><code>src/core/file_sys/archive_ncch.cpp:132-158</code></a></li>
<li>Holds cbf_zh-Hant-TW.bcfnt.lz. No embedded replacement answers this title low ID.</li>
</ul>
</div>
<div class="rb-file-entry rb-file-entry-optional">
<p><strong><code>shared_font.bin</code></strong> <span class="rb-badge rb-badge-muted">optional</span> <span class="rb-badge rb-badge-success">in repo</span> <span class="rb-badge rb-badge-info">HLE fallback</span>
<br>system shared font, legacy dump</p>
<ul>
<li>Path: <code>sysdata/shared_font.bin</code></li>
<li>System: <a href="../../systems/nintendo/#3ds">nintendo-3ds</a></li>
<li>Source: <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/hle/service/apt/apt.cpp#L230-L246"><code>src/core/hle/service/apt/apt.cpp:230-246</code></a>, <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/hle/service/apt/apt.cpp#L256-L272"><code>src/core/hle/service/apt/apt.cpp:256-272</code></a></li>
<li>Copied whole into the shared memory block, so the file carries the 0x80 byte APT header. Tried after the system archive and before the regional BCFNT files.</li>
</ul>
</div>
<div class="rb-file-entry rb-file-entry-optional">
<p><strong><code>cbf_std.bcfnt</code></strong> <span class="rb-badge rb-badge-muted">optional</span> <span class="rb-badge rb-badge-success">in repo</span> <span class="rb-badge rb-badge-info">HLE fallback</span> <span class="rb-badge rb-badge-muted">japan, north-america, europe, australia</span> <span class="rb-badge rb-badge-muted">bundled</span>
<br>shared font for JPN, USA, EUR and AUS</p>
<ul>
<li>Path: <code>sysdata/cbf_std.bcfnt</code></li>
<li>System: <a href="../../systems/nintendo/#3ds">nintendo-3ds</a></li>
<li>Source: <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/hle/service/apt/apt.cpp#L184-L228"><code>src/core/hle/service/apt/apt.cpp:184-228</code></a>, <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/file_sys/archive_ncch.cpp#L143-L148"><code>src/core/file_sys/archive_ncch.cpp:143-148</code></a></li>
<li>Read to offset 0x80 of the shared memory block, so the file is a bare uncompressed BCFNT. Selected for every CFG region other than CHN, KOR and TWN. The embedded open-source font answers the archive request first, so this file is only reached when that archive path is taken out.</li>
</ul>
</div>
<div class="rb-file-entry rb-file-entry-optional">
<p><strong><code>cbf_zh-Hans-CN.bcfnt</code></strong> <span class="rb-badge rb-badge-muted">optional</span> <span class="rb-badge rb-badge-success">in repo</span> <span class="rb-badge rb-badge-muted">china</span> <span class="rb-badge rb-badge-muted">bundled</span>
<br>shared font for CHN</p>
<ul>
<li>Path: <code>sysdata/cbf_zh-Hans-CN.bcfnt</code></li>
<li>System: <a href="../../systems/nintendo/#3ds">nintendo-3ds</a></li>
<li>Source: <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/hle/service/apt/apt.cpp#L184-L228"><code>src/core/hle/service/apt/apt.cpp:184-228</code></a>, <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/hle/service/apt/apt.cpp#L256-L272"><code>src/core/hle/service/apt/apt.cpp:256-272</code></a></li>
<li>Selected when the CFG region is CHN. The embedded font does not cover archive 0x00014102, so the session ends with ErrorSystemFiles without this file or shared_font.bin.</li>
</ul>
</div>
<div class="rb-file-entry rb-file-entry-optional">
<p><strong><code>cbf_ko-Hang-KR.bcfnt</code></strong> <span class="rb-badge rb-badge-muted">optional</span> <span class="rb-badge rb-badge-success">in repo</span> <span class="rb-badge rb-badge-muted">south-korea</span> <span class="rb-badge rb-badge-muted">bundled</span>
<br>shared font for KOR</p>
<ul>
<li>Path: <code>sysdata/cbf_ko-Hang-KR.bcfnt</code></li>
<li>System: <a href="../../systems/nintendo/#3ds">nintendo-3ds</a></li>
<li>Source: <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/hle/service/apt/apt.cpp#L184-L228"><code>src/core/hle/service/apt/apt.cpp:184-228</code></a>, <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/hle/service/apt/apt.cpp#L256-L272"><code>src/core/hle/service/apt/apt.cpp:256-272</code></a></li>
<li>Selected when the CFG region is KOR. The embedded font does not cover archive 0x00014202, so the session ends with ErrorSystemFiles without this file or shared_font.bin.</li>
</ul>
</div>
<div class="rb-file-entry rb-file-entry-optional">
<p><strong><code>cbf_zh-Hant-TW.bcfnt</code></strong> <span class="rb-badge rb-badge-muted">optional</span> <span class="rb-badge rb-badge-success">in repo</span> <span class="rb-badge rb-badge-muted">taiwan</span> <span class="rb-badge rb-badge-muted">bundled</span>
<br>shared font for TWN</p>
<ul>
<li>Path: <code>sysdata/cbf_zh-Hant-TW.bcfnt</code></li>
<li>System: <a href="../../systems/nintendo/#3ds">nintendo-3ds</a></li>
<li>Source: <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/hle/service/apt/apt.cpp#L184-L228"><code>src/core/hle/service/apt/apt.cpp:184-228</code></a>, <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/hle/service/apt/apt.cpp#L256-L272"><code>src/core/hle/service/apt/apt.cpp:256-272</code></a></li>
<li>Selected when the CFG region is TWN. The embedded font does not cover archive 0x00014302, so the session ends with ErrorSystemFiles without this file or shared_font.bin.</li>
</ul>
</div>
<div class="rb-file-entry rb-file-entry-optional">
<p><strong><code>00000000.app.romfs</code></strong> <span class="rb-badge rb-badge-muted">optional</span> <span class="rb-badge rb-badge-success">in repo</span> <span class="rb-badge rb-badge-info">HLE fallback</span> <span class="rb-badge rb-badge-muted">bundled</span>
<br>Mii data system archive, title 0x0004009b00010202</p>
<ul>
<li>Path: <code>nand/00000000000000000000000000000000/title/0004009b/00010202/content/00000000.app.romfs</code></li>
<li>System: <a href="../../systems/nintendo/#3ds">nintendo-3ds</a></li>
<li>Source: <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/file_sys/ncch_container.cpp#L726-L741"><code>src/core/file_sys/ncch_container.cpp:726-741</code></a>, <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/file_sys/archive_ncch.cpp#L132-L136"><code>src/core/file_sys/archive_ncch.cpp:132-136</code></a></li>
<li>Split-off RomFS served in place of the NCCH the title tree resolves to. An open-source replacement is built into the binary.</li>
</ul>
</div>
<div class="rb-file-entry rb-file-entry-optional">
<p><strong><code>00000000.app.romfs</code></strong> <span class="rb-badge rb-badge-muted">optional</span> <span class="rb-badge rb-badge-success">in repo</span> <span class="rb-badge rb-badge-info">HLE fallback</span> <span class="rb-badge rb-badge-muted">bundled</span>
<br>country list system archive, title 0x0004009b00010402</p>
<ul>
<li>Path: <code>nand/00000000000000000000000000000000/title/0004009b/00010402/content/00000000.app.romfs</code></li>
<li>System: <a href="../../systems/nintendo/#3ds">nintendo-3ds</a></li>
<li>Source: <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/file_sys/ncch_container.cpp#L726-L741"><code>src/core/file_sys/ncch_container.cpp:726-741</code></a>, <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/file_sys/archive_ncch.cpp#L137-L142"><code>src/core/file_sys/archive_ncch.cpp:137-142</code></a></li>
<li>Split-off RomFS served in place of the NCCH the title tree resolves to. An open-source replacement is built into the binary.</li>
</ul>
</div>
<div class="rb-file-entry rb-file-entry-optional">
<p><strong><code>00000000.app.romfs</code></strong> <span class="rb-badge rb-badge-muted">optional</span> <span class="rb-badge rb-badge-success">in repo</span> <span class="rb-badge rb-badge-info">HLE fallback</span> <span class="rb-badge rb-badge-muted">bundled</span>
<br>bad word list system archive, title 0x000400db00010302</p>
<ul>
<li>Path: <code>nand/00000000000000000000000000000000/title/000400db/00010302/content/00000000.app.romfs</code></li>
<li>System: <a href="../../systems/nintendo/#3ds">nintendo-3ds</a></li>
<li>Source: <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/file_sys/ncch_container.cpp#L726-L741"><code>src/core/file_sys/ncch_container.cpp:726-741</code></a>, <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/file_sys/archive_ncch.cpp#L150-L157"><code>src/core/file_sys/archive_ncch.cpp:150-157</code></a></li>
<li>Split-off RomFS served in place of the NCCH the title tree resolves to. An open-source replacement is built into the binary.</li>
</ul>
</div>
<div class="rb-file-entry rb-file-entry-optional">
<p><strong><code>00000000.tmd</code></strong> <span class="rb-badge rb-badge-muted">optional</span> <span class="rb-badge rb-badge-success">in repo</span> <span class="rb-badge rb-badge-info">HLE fallback</span> <span class="rb-badge rb-badge-muted">bundled</span>
<br>title metadata of the DLP module, title 0x0004013000002802</p>
<ul>
<li>Path: <code>nand/00000000000000000000000000000000/title/00040130/00002802/content/00000000.tmd</code></li>
<li>System: <a href="../../systems/nintendo/#3ds">nintendo-3ds</a></li>
<li>Source: <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/hle/service/am/am.cpp#L428-L464"><code>src/core/hle/service/am/am.cpp:428-464</code></a>, <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/hle/service/am/am.cpp#L466-L501"><code>src/core/hle/service/am/am.cpp:466-501</code></a>, <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/file_sys/title_metadata.cpp#L19-L34"><code>src/core/file_sys/title_metadata.cpp:19-34</code></a></li>
<li>Read to resolve the content ID of index 0, which the shipped metadata gives as 0x1f. Without it the path falls back to content ID 0 and the module is not found.</li>
</ul>
</div>
<div class="rb-file-entry rb-file-entry-optional">
<p><strong><code>0000001f.app</code></strong> <span class="rb-badge rb-badge-muted">optional</span> <span class="rb-badge rb-badge-success">in repo</span> <span class="rb-badge rb-badge-info">HLE fallback</span> <span class="rb-badge rb-badge-muted">bundled</span>
<br>DLP system module, title 0x0004013000002802</p>
<ul>
<li>Path: <code>nand/00000000000000000000000000000000/title/00040130/00002802/content/0000001f.app</code></li>
<li>System: <a href="../../systems/nintendo/#3ds">nintendo-3ds</a></li>
<li>Source: <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/hle/service/service.cpp#L78"><code>src/core/hle/service/service.cpp:78</code></a>, <a href="https://github.com/weihuoya/citra/blob/302b0c3bc4312bc96489c11584a97664894b343f/src/core/hle/service/service.cpp#L197-L213"><code>src/core/hle/service/service.cpp:197-213</code></a></li>
<li>Loaded as a process when LLE is enabled for DLP, otherwise the HLE service is installed.</li>
</ul>
</div>
<p><em>Generated on 2026-08-23T16:12:06Z</em></p>
</article>
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