12 files changed, 1611 insertions, 406 deletions

diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
index b22c9fd05..96ab39cb8 100644
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -790,6 +790,12 @@ add_library(core STATIC
     hle/service/service.h
     hle/service/set/set.cpp
     hle/service/set/set.h
+    hle/service/set/appln_settings.cpp
+    hle/service/set/appln_settings.h
+    hle/service/set/device_settings.cpp
+    hle/service/set/device_settings.h
+    hle/service/set/private_settings.cpp
+    hle/service/set/private_settings.h
     hle/service/set/set_cal.cpp
     hle/service/set/set_cal.h
     hle/service/set/set_fd.cpp
@@ -798,6 +804,8 @@ add_library(core STATIC
     hle/service/set/set_sys.h
     hle/service/set/settings.cpp
     hle/service/set/settings.h
+    hle/service/set/system_settings.cpp
+    hle/service/set/system_settings.h
     hle/service/sm/sm.cpp
     hle/service/sm/sm.h
     hle/service/sm/sm_controller.cpp
diff --git a/src/core/hle/service/set/appln_settings.cpp b/src/core/hle/service/set/appln_settings.cpp
new file mode 100644
index 000000000..a5d802757
--- /dev/null
+++ b/src/core/hle/service/set/appln_settings.cpp
@@ -0,0 +1,12 @@
+// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "core/hle/service/set/appln_settings.h"
+
+namespace Service::Set {
+
+ApplnSettings DefaultApplnSettings() {
+    return {};
+}
+
+} // namespace Service::Set
diff --git a/src/core/hle/service/set/appln_settings.h b/src/core/hle/service/set/appln_settings.h
new file mode 100644
index 000000000..b07df0ee7
--- /dev/null
+++ b/src/core/hle/service/set/appln_settings.h
@@ -0,0 +1,35 @@
+// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <array>
+
+#include "common/common_types.h"
+
+namespace Service::Set {
+struct ApplnSettings {
+    std::array<u8, 0x10> reserved_000;
+
+    // nn::util::Uuid MiiAuthorId, copied from system settings 0x94B0
+    std::array<u8, 0x10> mii_author_id;
+
+    std::array<u8, 0x30> reserved_020;
+
+    // nn::settings::system::ServiceDiscoveryControlSettings
+    std::array<u8, 0x4> service_discovery_control_settings;
+
+    std::array<u8, 0x20> reserved_054;
+
+    bool in_repair_process_enable_flag;
+
+    std::array<u8, 0x3> pad_075;
+};
+static_assert(offsetof(ApplnSettings, mii_author_id) == 0x10);
+static_assert(offsetof(ApplnSettings, service_discovery_control_settings) == 0x50);
+static_assert(offsetof(ApplnSettings, in_repair_process_enable_flag) == 0x74);
+static_assert(sizeof(ApplnSettings) == 0x78, "ApplnSettings has the wrong size!");
+
+ApplnSettings DefaultApplnSettings();
+
+} // namespace Service::Set
diff --git a/src/core/hle/service/set/device_settings.cpp b/src/core/hle/service/set/device_settings.cpp
new file mode 100644
index 000000000..e423ce38a
--- /dev/null
+++ b/src/core/hle/service/set/device_settings.cpp
@@ -0,0 +1,12 @@
+// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "core/hle/service/set/device_settings.h"
+
+namespace Service::Set {
+
+DeviceSettings DefaultDeviceSettings() {
+    return {};
+}
+
+} // namespace Service::Set
diff --git a/src/core/hle/service/set/device_settings.h b/src/core/hle/service/set/device_settings.h
new file mode 100644
index 000000000..b6cfe04f2
--- /dev/null
+++ b/src/core/hle/service/set/device_settings.h
@@ -0,0 +1,53 @@
+// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <array>
+
+#include "common/common_types.h"
+
+namespace Service::Set {
+struct DeviceSettings {
+    std::array<u8, 0x10> reserved_000;
+
+    // nn::settings::BatteryLot
+    std::array<u8, 0x18> ptm_battery_lot;
+    // nn::settings::system::PtmFuelGaugeParameter
+    std::array<u8, 0x18> ptm_fuel_gauge_parameter;
+    u8 ptm_battery_version;
+    // nn::settings::system::PtmCycleCountReliability
+    u32 ptm_cycle_count_reliability;
+
+    std::array<u8, 0x48> reserved_048;
+
+    // nn::settings::system::AnalogStickUserCalibration L
+    std::array<u8, 0x10> analog_user_stick_calibration_l;
+    // nn::settings::system::AnalogStickUserCalibration R
+    std::array<u8, 0x10> analog_user_stick_calibration_r;
+
+    std::array<u8, 0x20> reserved_0B0;
+
+    // nn::settings::system::ConsoleSixAxisSensorAccelerationBias
+    std::array<u8, 0xC> console_six_axis_sensor_acceleration_bias;
+    // nn::settings::system::ConsoleSixAxisSensorAngularVelocityBias
+    std::array<u8, 0xC> console_six_axis_sensor_angular_velocity_bias;
+    // nn::settings::system::ConsoleSixAxisSensorAccelerationGain
+    std::array<u8, 0x24> console_six_axis_sensor_acceleration_gain;
+    // nn::settings::system::ConsoleSixAxisSensorAngularVelocityGain
+    std::array<u8, 0x24> console_six_axis_sensor_angular_velocity_gain;
+    // nn::settings::system::ConsoleSixAxisSensorAngularVelocityTimeBias
+    std::array<u8, 0xC> console_six_axis_sensor_angular_velocity_time_bias;
+    // nn::settings::system::ConsoleSixAxisSensorAngularAcceleration
+    std::array<u8, 0x24> console_six_axis_sensor_angular_acceleration;
+};
+static_assert(offsetof(DeviceSettings, ptm_battery_lot) == 0x10);
+static_assert(offsetof(DeviceSettings, ptm_cycle_count_reliability) == 0x44);
+static_assert(offsetof(DeviceSettings, analog_user_stick_calibration_l) == 0x90);
+static_assert(offsetof(DeviceSettings, console_six_axis_sensor_acceleration_bias) == 0xD0);
+static_assert(offsetof(DeviceSettings, console_six_axis_sensor_angular_acceleration) == 0x13C);
+static_assert(sizeof(DeviceSettings) == 0x160, "DeviceSettings has the wrong size!");
+
+DeviceSettings DefaultDeviceSettings();
+
+} // namespace Service::Set
diff --git a/src/core/hle/service/set/private_settings.cpp b/src/core/hle/service/set/private_settings.cpp
new file mode 100644
index 000000000..70bf65727
--- /dev/null
+++ b/src/core/hle/service/set/private_settings.cpp
@@ -0,0 +1,12 @@
+// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "core/hle/service/set/private_settings.h"
+
+namespace Service::Set {
+
+PrivateSettings DefaultPrivateSettings() {
+    return {};
+}
+
+} // namespace Service::Set
diff --git a/src/core/hle/service/set/private_settings.h b/src/core/hle/service/set/private_settings.h
new file mode 100644
index 000000000..b63eaf45c
--- /dev/null
+++ b/src/core/hle/service/set/private_settings.h
@@ -0,0 +1,72 @@
+// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <array>
+
+#include "common/bit_field.h"
+#include "common/common_funcs.h"
+#include "common/common_types.h"
+#include "common/uuid.h"
+#include "core/hle/service/time/clock_types.h"
+
+namespace Service::Set {
+
+/// This is nn::settings::system::InitialLaunchFlag
+struct InitialLaunchFlag {
+    union {
+        u32 raw{};
+
+        BitField<0, 1, u32> InitialLaunchCompletionFlag;
+        BitField<8, 1, u32> InitialLaunchUserAdditionFlag;
+        BitField<16, 1, u32> InitialLaunchTimestampFlag;
+    };
+};
+static_assert(sizeof(InitialLaunchFlag) == 4, "InitialLaunchFlag is an invalid size");
+
+/// This is nn::settings::system::InitialLaunchSettings
+struct InitialLaunchSettings {
+    InitialLaunchFlag flags;
+    INSERT_PADDING_BYTES(0x4);
+    Service::Time::Clock::SteadyClockTimePoint timestamp;
+};
+static_assert(sizeof(InitialLaunchSettings) == 0x20, "InitialLaunchSettings is incorrect size");
+
+#pragma pack(push, 4)
+struct InitialLaunchSettingsPacked {
+    InitialLaunchFlag flags;
+    Service::Time::Clock::SteadyClockTimePoint timestamp;
+};
+#pragma pack(pop)
+static_assert(sizeof(InitialLaunchSettingsPacked) == 0x1C,
+              "InitialLaunchSettingsPacked is incorrect size");
+
+struct PrivateSettings {
+    std::array<u8, 0x10> reserved_00;
+
+    // nn::settings::system::InitialLaunchSettings
+    InitialLaunchSettings initial_launch_settings;
+
+    std::array<u8, 0x20> reserved_30;
+
+    Common::UUID external_clock_source_id;
+    s64 shutdown_rtc_value;
+    s64 external_steady_clock_internal_offset;
+
+    std::array<u8, 0x60> reserved_70;
+
+    // nn::settings::system::PlatformRegion
+    std::array<u8, 0x4> platform_region;
+
+    std::array<u8, 0x4> reserved_D4;
+};
+static_assert(offsetof(PrivateSettings, initial_launch_settings) == 0x10);
+static_assert(offsetof(PrivateSettings, external_clock_source_id) == 0x50);
+static_assert(offsetof(PrivateSettings, reserved_70) == 0x70);
+static_assert(offsetof(PrivateSettings, platform_region) == 0xD0);
+static_assert(sizeof(PrivateSettings) == 0xD8, "PrivateSettings has the wrong size!");
+
+PrivateSettings DefaultPrivateSettings();
+
+} // namespace Service::Set
diff --git a/src/core/hle/service/set/set.h b/src/core/hle/service/set/set.h
index b61a3560d..6ef3da410 100644
--- a/src/core/hle/service/set/set.h
+++ b/src/core/hle/service/set/set.h
@@ -4,35 +4,13 @@
 #pragma once
 
 #include "core/hle/service/service.h"
+#include "core/hle/service/set/system_settings.h"
 
 namespace Core {
 class System;
 }
 
 namespace Service::Set {
-
-/// This is "nn::settings::LanguageCode", which is a NUL-terminated string stored in a u64.
-enum class LanguageCode : u64 {
-    JA = 0x000000000000616A,
-    EN_US = 0x00000053552D6E65,
-    FR = 0x0000000000007266,
-    DE = 0x0000000000006564,
-    IT = 0x0000000000007469,
-    ES = 0x0000000000007365,
-    ZH_CN = 0x0000004E432D687A,
-    KO = 0x0000000000006F6B,
-    NL = 0x0000000000006C6E,
-    PT = 0x0000000000007470,
-    RU = 0x0000000000007572,
-    ZH_TW = 0x00000057542D687A,
-    EN_GB = 0x00000042472D6E65,
-    FR_CA = 0x00000041432D7266,
-    ES_419 = 0x00003931342D7365,
-    ZH_HANS = 0x00736E61482D687A,
-    ZH_HANT = 0x00746E61482D687A,
-    PT_BR = 0x00000052422D7470,
-};
-
 enum class KeyboardLayout : u64 {
     Japanese = 0,
     EnglishUs = 1,
diff --git a/src/core/hle/service/set/set_sys.cpp b/src/core/hle/service/set/set_sys.cpp
index 48304e6d1..0653779d5 100644
--- a/src/core/hle/service/set/set_sys.cpp
+++ b/src/core/hle/service/set/set_sys.cpp
@@ -1,7 +1,12 @@
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+#include <fstream>
+
 #include "common/assert.h"
+#include "common/fs/file.h"
+#include "common/fs/fs.h"
+#include "common/fs/path_util.h"
 #include "common/logging/log.h"
 #include "common/settings.h"
 #include "common/string_util.h"
@@ -19,6 +24,16 @@
 
 namespace Service::Set {
 
+namespace {
+constexpr u32 SETTINGS_VERSION{1u};
+constexpr auto SETTINGS_MAGIC = Common::MakeMagic('y', 'u', 'z', 'u', '_', 's', 'e', 't');
+struct SettingsHeader {
+    u64 magic;
+    u32 version;
+    u32 reserved;
+};
+} // Anonymous namespace
+
 Result GetFirmwareVersionImpl(FirmwareVersionFormat& out_firmware, Core::System& system,
                               GetFirmwareVersionType type) {
     constexpr u64 FirmwareVersionSystemDataId = 0x0100000000000809;
@@ -72,11 +87,120 @@ Result GetFirmwareVersionImpl(FirmwareVersionFormat& out_firmware, Core::System&
     return ResultSuccess;
 }
 
+bool SET_SYS::LoadSettingsFile(std::filesystem::path& path, auto&& default_func) {
+    using settings_type = decltype(default_func());
+
+    if (!Common::FS::CreateDirs(path)) {
+        return false;
+    }
+
+    auto settings_file = path / "settings.dat";
+    auto exists = std::filesystem::exists(settings_file);
+    auto file_size_ok = exists && std::filesystem::file_size(settings_file) ==
+                                      sizeof(SettingsHeader) + sizeof(settings_type);
+
+    auto ResetToDefault = [&]() {
+        auto default_settings{default_func()};
+
+        SettingsHeader hdr{
+            .magic = SETTINGS_MAGIC,
+            .version = SETTINGS_VERSION,
+            .reserved = 0u,
+        };
+
+        std::ofstream out_settings_file(settings_file, std::ios::out | std::ios::binary);
+        out_settings_file.write(reinterpret_cast<const char*>(&hdr), sizeof(hdr));
+        out_settings_file.write(reinterpret_cast<const char*>(&default_settings),
+                                sizeof(settings_type));
+        out_settings_file.flush();
+        out_settings_file.close();
+    };
+
+    constexpr auto IsHeaderValid = [](std::ifstream& file) -> bool {
+        if (!file.is_open()) {
+            return false;
+        }
+        SettingsHeader hdr{};
+        file.read(reinterpret_cast<char*>(&hdr), sizeof(hdr));
+        return hdr.magic == SETTINGS_MAGIC && hdr.version == SETTINGS_VERSION;
+    };
+
+    if (!exists || !file_size_ok) {
+        ResetToDefault();
+    }
+
+    std::ifstream file(settings_file, std::ios::binary | std::ios::in);
+    if (!IsHeaderValid(file)) {
+        file.close();
+        ResetToDefault();
+        file = std::ifstream(settings_file, std::ios::binary | std::ios::in);
+        if (!IsHeaderValid(file)) {
+            return false;
+        }
+    }
+
+    if constexpr (std::is_same_v<settings_type, PrivateSettings>) {
+        file.read(reinterpret_cast<char*>(&m_private_settings), sizeof(settings_type));
+    } else if constexpr (std::is_same_v<settings_type, DeviceSettings>) {
+        file.read(reinterpret_cast<char*>(&m_device_settings), sizeof(settings_type));
+    } else if constexpr (std::is_same_v<settings_type, ApplnSettings>) {
+        file.read(reinterpret_cast<char*>(&m_appln_settings), sizeof(settings_type));
+    } else if constexpr (std::is_same_v<settings_type, SystemSettings>) {
+        file.read(reinterpret_cast<char*>(&m_system_settings), sizeof(settings_type));
+    } else {
+        UNREACHABLE();
+    }
+    file.close();
+
+    return true;
+}
+
+bool SET_SYS::StoreSettingsFile(std::filesystem::path& path, auto& settings) {
+    using settings_type = std::decay_t<decltype(settings)>;
+
+    if (!Common::FS::IsDir(path)) {
+        return false;
+    }
+
+    auto settings_base = path / "settings";
+    auto settings_tmp_file = settings_base;
+    settings_tmp_file = settings_tmp_file.replace_extension("tmp");
+    std::ofstream file(settings_tmp_file, std::ios::binary | std::ios::out);
+    if (!file.is_open()) {
+        return false;
+    }
+
+    SettingsHeader hdr{
+        .magic = SETTINGS_MAGIC,
+        .version = SETTINGS_VERSION,
+        .reserved = 0u,
+    };
+    file.write(reinterpret_cast<const char*>(&hdr), sizeof(hdr));
+
+    if constexpr (std::is_same_v<settings_type, PrivateSettings>) {
+        file.write(reinterpret_cast<const char*>(&m_private_settings), sizeof(settings_type));
+    } else if constexpr (std::is_same_v<settings_type, DeviceSettings>) {
+        file.write(reinterpret_cast<const char*>(&m_device_settings), sizeof(settings_type));
+    } else if constexpr (std::is_same_v<settings_type, ApplnSettings>) {
+        file.write(reinterpret_cast<const char*>(&m_appln_settings), sizeof(settings_type));
+    } else if constexpr (std::is_same_v<settings_type, SystemSettings>) {
+        file.write(reinterpret_cast<const char*>(&m_system_settings), sizeof(settings_type));
+    } else {
+        UNREACHABLE();
+    }
+    file.close();
+
+    std::filesystem::rename(settings_tmp_file, settings_base.replace_extension("dat"));
+
+    return true;
+}
+
 void SET_SYS::SetLanguageCode(HLERequestContext& ctx) {
     IPC::RequestParser rp{ctx};
-    language_code_setting = rp.PopEnum<LanguageCode>();
+    m_system_settings.language_code = rp.PopEnum<LanguageCode>();
+    SetSaveNeeded();
 
-    LOG_INFO(Service_SET, "called, language_code={}", language_code_setting);
+    LOG_INFO(Service_SET, "called, language_code={}", m_system_settings.language_code);
 
     IPC::ResponseBuilder rb{ctx, 2};
     rb.Push(ResultSuccess);
@@ -112,19 +236,68 @@ void SET_SYS::GetFirmwareVersion2(HLERequestContext& ctx) {
     rb.Push(result);
 }
 
+void SET_SYS::GetExternalSteadyClockSourceId(HLERequestContext& ctx) {
+    LOG_INFO(Service_SET, "called");
+
+    Common::UUID id{};
+    auto res = GetExternalSteadyClockSourceId(id);
+
+    IPC::ResponseBuilder rb{ctx, 2 + sizeof(Common::UUID) / sizeof(u32)};
+    rb.Push(res);
+    rb.PushRaw(id);
+}
+
+void SET_SYS::SetExternalSteadyClockSourceId(HLERequestContext& ctx) {
+    LOG_INFO(Service_SET, "called");
+
+    IPC::RequestParser rp{ctx};
+    auto id{rp.PopRaw<Common::UUID>()};
+
+    auto res = SetExternalSteadyClockSourceId(id);
+
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(res);
+}
+
+void SET_SYS::GetUserSystemClockContext(HLERequestContext& ctx) {
+    LOG_INFO(Service_SET, "called");
+
+    Service::Time::Clock::SystemClockContext context{};
+    auto res = GetUserSystemClockContext(context);
+
+    IPC::ResponseBuilder rb{ctx,
+                            2 + sizeof(Service::Time::Clock::SystemClockContext) / sizeof(u32)};
+    rb.Push(res);
+    rb.PushRaw(context);
+}
+
+void SET_SYS::SetUserSystemClockContext(HLERequestContext& ctx) {
+    LOG_INFO(Service_SET, "called");
+
+    IPC::RequestParser rp{ctx};
+    auto context{rp.PopRaw<Service::Time::Clock::SystemClockContext>()};
+
+    auto res = SetUserSystemClockContext(context);
+
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(res);
+}
+
 void SET_SYS::GetAccountSettings(HLERequestContext& ctx) {
     LOG_INFO(Service_SET, "called");
 
     IPC::ResponseBuilder rb{ctx, 3};
     rb.Push(ResultSuccess);
-    rb.PushRaw(account_settings);
+    rb.PushRaw(m_system_settings.account_settings);
 }
 
 void SET_SYS::SetAccountSettings(HLERequestContext& ctx) {
     IPC::RequestParser rp{ctx};
-    account_settings = rp.PopRaw<AccountSettings>();
+    m_system_settings.account_settings = rp.PopRaw<AccountSettings>();
+    SetSaveNeeded();
 
-    LOG_INFO(Service_SET, "called, account_settings_flags={}", account_settings.flags);
+    LOG_INFO(Service_SET, "called, account_settings_flags={}",
+             m_system_settings.account_settings.flags);
 
     IPC::ResponseBuilder rb{ctx, 2};
     rb.Push(ResultSuccess);
@@ -133,11 +306,11 @@ void SET_SYS::SetAccountSettings(HLERequestContext& ctx) {
 void SET_SYS::GetEulaVersions(HLERequestContext& ctx) {
     LOG_INFO(Service_SET, "called");
 
-    ctx.WriteBuffer(eula_versions);
+    ctx.WriteBuffer(m_system_settings.eula_versions);
 
     IPC::ResponseBuilder rb{ctx, 3};
     rb.Push(ResultSuccess);
-    rb.Push(static_cast<u32>(eula_versions.size()));
+    rb.Push(m_system_settings.eula_version_count);
 }
 
 void SET_SYS::SetEulaVersions(HLERequestContext& ctx) {
@@ -145,13 +318,12 @@ void SET_SYS::SetEulaVersions(HLERequestContext& ctx) {
     const auto buffer_data = ctx.ReadBuffer();
 
     LOG_INFO(Service_SET, "called, elements={}", elements);
+    ASSERT(elements <= m_system_settings.eula_versions.size());
 
-    eula_versions.resize(elements);
-    for (std::size_t index = 0; index < elements; index++) {
-        const std::size_t start_index = index * sizeof(EulaVersion);
-        memcpy(eula_versions.data() + start_index, buffer_data.data() + start_index,
-               sizeof(EulaVersion));
-    }
+    m_system_settings.eula_version_count = static_cast<u32>(elements);
+    std::memcpy(&m_system_settings.eula_versions, buffer_data.data(),
+                sizeof(EulaVersion) * elements);
+    SetSaveNeeded();
 
     IPC::ResponseBuilder rb{ctx, 2};
     rb.Push(ResultSuccess);
@@ -162,14 +334,15 @@ void SET_SYS::GetColorSetId(HLERequestContext& ctx) {
 
     IPC::ResponseBuilder rb{ctx, 3};
     rb.Push(ResultSuccess);
-    rb.PushEnum(color_set);
+    rb.PushEnum(m_system_settings.color_set_id);
 }
 
 void SET_SYS::SetColorSetId(HLERequestContext& ctx) {
     IPC::RequestParser rp{ctx};
-    color_set = rp.PopEnum<ColorSet>();
+    m_system_settings.color_set_id = rp.PopEnum<ColorSet>();
+    SetSaveNeeded();
 
-    LOG_DEBUG(Service_SET, "called, color_set={}", color_set);
+    LOG_DEBUG(Service_SET, "called, color_set={}", m_system_settings.color_set_id);
 
     IPC::ResponseBuilder rb{ctx, 2};
     rb.Push(ResultSuccess);
@@ -180,17 +353,21 @@ void SET_SYS::GetNotificationSettings(HLERequestContext& ctx) {
 
     IPC::ResponseBuilder rb{ctx, 8};
     rb.Push(ResultSuccess);
-    rb.PushRaw(notification_settings);
+    rb.PushRaw(m_system_settings.notification_settings);
 }
 
 void SET_SYS::SetNotificationSettings(HLERequestContext& ctx) {
     IPC::RequestParser rp{ctx};
-    notification_settings = rp.PopRaw<NotificationSettings>();
+    m_system_settings.notification_settings = rp.PopRaw<NotificationSettings>();
+    SetSaveNeeded();
 
     LOG_INFO(Service_SET, "called, flags={}, volume={}, head_time={}:{}, tailt_time={}:{}",
-             notification_settings.flags.raw, notification_settings.volume,
-             notification_settings.start_time.hour, notification_settings.start_time.minute,
-             notification_settings.stop_time.hour, notification_settings.stop_time.minute);
+             m_system_settings.notification_settings.flags.raw,
+             m_system_settings.notification_settings.volume,
+             m_system_settings.notification_settings.start_time.hour,
+             m_system_settings.notification_settings.start_time.minute,
+             m_system_settings.notification_settings.stop_time.hour,
+             m_system_settings.notification_settings.stop_time.minute);
 
     IPC::ResponseBuilder rb{ctx, 2};
     rb.Push(ResultSuccess);
@@ -199,11 +376,11 @@ void SET_SYS::SetNotificationSettings(HLERequestContext& ctx) {
 void SET_SYS::GetAccountNotificationSettings(HLERequestContext& ctx) {
     LOG_INFO(Service_SET, "called");
 
-    ctx.WriteBuffer(account_notifications);
+    ctx.WriteBuffer(m_system_settings.account_notification_settings);
 
     IPC::ResponseBuilder rb{ctx, 3};
     rb.Push(ResultSuccess);
-    rb.Push(static_cast<u32>(account_notifications.size()));
+    rb.Push(m_system_settings.account_notification_settings_count);
 }
 
 void SET_SYS::SetAccountNotificationSettings(HLERequestContext& ctx) {
@@ -212,12 +389,12 @@ void SET_SYS::SetAccountNotificationSettings(HLERequestContext& ctx) {
 
     LOG_INFO(Service_SET, "called, elements={}", elements);
 
-    account_notifications.resize(elements);
-    for (std::size_t index = 0; index < elements; index++) {
-        const std::size_t start_index = index * sizeof(AccountNotificationSettings);
-        memcpy(account_notifications.data() + start_index, buffer_data.data() + start_index,
-               sizeof(AccountNotificationSettings));
-    }
+    ASSERT(elements <= m_system_settings.account_notification_settings.size());
+
+    m_system_settings.account_notification_settings_count = static_cast<u32>(elements);
+    std::memcpy(&m_system_settings.account_notification_settings, buffer_data.data(),
+                elements * sizeof(AccountNotificationSettings));
+    SetSaveNeeded();
 
     IPC::ResponseBuilder rb{ctx, 2};
     rb.Push(ResultSuccess);
@@ -244,6 +421,14 @@ static Settings GetSettings() {
     ret["hbloader"]["applet_heap_size"] = ToBytes(u64{0x0});
     ret["hbloader"]["applet_heap_reservation_size"] = ToBytes(u64{0x8600000});
 
+    // Time
+    ret["time"]["notify_time_to_fs_interval_seconds"] = ToBytes(s32{600});
+    ret["time"]["standard_network_clock_sufficient_accuracy_minutes"] =
+        ToBytes(s32{43200}); // 30 days
+    ret["time"]["standard_steady_clock_rtc_update_interval_minutes"] = ToBytes(s32{5});
+    ret["time"]["standard_steady_clock_test_offset_minutes"] = ToBytes(s32{0});
+    ret["time"]["standard_user_clock_initial_year"] = ToBytes(s32{2023});
+
     return ret;
 }
 
@@ -273,8 +458,6 @@ void SET_SYS::GetSettingsItemValueSize(HLERequestContext& ctx) {
 }
 
 void SET_SYS::GetSettingsItemValue(HLERequestContext& ctx) {
-    LOG_DEBUG(Service_SET, "called");
-
     // The category of the setting. This corresponds to the top-level keys of
     // system_settings.ini.
     const auto setting_category_buf{ctx.ReadBuffer(0)};
@@ -285,14 +468,13 @@ void SET_SYS::GetSettingsItemValue(HLERequestContext& ctx) {
     const auto setting_name_buf{ctx.ReadBuffer(1)};
     const std::string setting_name{setting_name_buf.begin(), setting_name_buf.end()};
 
-    auto settings{GetSettings()};
-    Result response{ResultUnknown};
+    std::vector<u8> value;
+    auto response = GetSettingsItemValue(value, setting_category, setting_name);
 
-    if (settings.contains(setting_category) && settings[setting_category].contains(setting_name)) {
-        auto setting_value = settings[setting_category][setting_name];
-        ctx.WriteBuffer(setting_value.data(), setting_value.size());
-        response = ResultSuccess;
-    }
+    LOG_INFO(Service_SET, "called. category={}, name={} -- res=0x{:X}", setting_category,
+             setting_name, response.raw);
+
+    ctx.WriteBuffer(value.data(), value.size());
 
     IPC::ResponseBuilder rb{ctx, 2};
     rb.Push(response);
@@ -303,19 +485,23 @@ void SET_SYS::GetTvSettings(HLERequestContext& ctx) {
 
     IPC::ResponseBuilder rb{ctx, 10};
     rb.Push(ResultSuccess);
-    rb.PushRaw(tv_settings);
+    rb.PushRaw(m_system_settings.tv_settings);
 }
 
 void SET_SYS::SetTvSettings(HLERequestContext& ctx) {
     IPC::RequestParser rp{ctx};
-    tv_settings = rp.PopRaw<TvSettings>();
+    m_system_settings.tv_settings = rp.PopRaw<TvSettings>();
+    SetSaveNeeded();
 
     LOG_INFO(Service_SET,
              "called, flags={}, cmu_mode={}, constrast_ratio={}, hdmi_content_type={}, "
              "rgb_range={}, tv_gama={}, tv_resolution={}, tv_underscan={}",
-             tv_settings.flags.raw, tv_settings.cmu_mode, tv_settings.constrast_ratio,
-             tv_settings.hdmi_content_type, tv_settings.rgb_range, tv_settings.tv_gama,
-             tv_settings.tv_resolution, tv_settings.tv_underscan);
+             m_system_settings.tv_settings.flags.raw, m_system_settings.tv_settings.cmu_mode,
+             m_system_settings.tv_settings.constrast_ratio,
+             m_system_settings.tv_settings.hdmi_content_type,
+             m_system_settings.tv_settings.rgb_range, m_system_settings.tv_settings.tv_gama,
+             m_system_settings.tv_settings.tv_resolution,
+             m_system_settings.tv_settings.tv_underscan);
 
     IPC::ResponseBuilder rb{ctx, 2};
     rb.Push(ResultSuccess);
@@ -329,16 +515,87 @@ void SET_SYS::GetQuestFlag(HLERequestContext& ctx) {
     rb.PushEnum(QuestFlag::Retail);
 }
 
+void SET_SYS::GetDeviceTimeZoneLocationName(HLERequestContext& ctx) {
+    LOG_WARNING(Service_SET, "called");
+
+    Service::Time::TimeZone::LocationName name{};
+    auto res = GetDeviceTimeZoneLocationName(name);
+
+    IPC::ResponseBuilder rb{ctx, 2 + sizeof(Service::Time::TimeZone::LocationName) / sizeof(u32)};
+    rb.Push(res);
+    rb.PushRaw<Service::Time::TimeZone::LocationName>(name);
+}
+
+void SET_SYS::SetDeviceTimeZoneLocationName(HLERequestContext& ctx) {
+    LOG_WARNING(Service_SET, "called");
+
+    IPC::RequestParser rp{ctx};
+    auto name{rp.PopRaw<Service::Time::TimeZone::LocationName>()};
+
+    auto res = SetDeviceTimeZoneLocationName(name);
+
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(res);
+}
+
 void SET_SYS::SetRegionCode(HLERequestContext& ctx) {
     IPC::RequestParser rp{ctx};
-    region_code = rp.PopEnum<RegionCode>();
+    m_system_settings.region_code = rp.PopEnum<RegionCode>();
+    SetSaveNeeded();
 
-    LOG_INFO(Service_SET, "called, region_code={}", region_code);
+    LOG_INFO(Service_SET, "called, region_code={}", m_system_settings.region_code);
 
     IPC::ResponseBuilder rb{ctx, 2};
     rb.Push(ResultSuccess);
 }
 
+void SET_SYS::GetNetworkSystemClockContext(HLERequestContext& ctx) {
+    LOG_INFO(Service_SET, "called");
+
+    Service::Time::Clock::SystemClockContext context{};
+    auto res = GetNetworkSystemClockContext(context);
+
+    IPC::ResponseBuilder rb{ctx,
+                            2 + sizeof(Service::Time::Clock::SystemClockContext) / sizeof(u32)};
+    rb.Push(res);
+    rb.PushRaw(context);
+}
+
+void SET_SYS::SetNetworkSystemClockContext(HLERequestContext& ctx) {
+    LOG_INFO(Service_SET, "called");
+
+    IPC::RequestParser rp{ctx};
+    auto context{rp.PopRaw<Service::Time::Clock::SystemClockContext>()};
+
+    auto res = SetNetworkSystemClockContext(context);
+
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(res);
+}
+
+void SET_SYS::IsUserSystemClockAutomaticCorrectionEnabled(HLERequestContext& ctx) {
+    LOG_INFO(Service_SET, "called");
+
+    bool enabled{};
+    auto res = IsUserSystemClockAutomaticCorrectionEnabled(enabled);
+
+    IPC::ResponseBuilder rb{ctx, 3};
+    rb.Push(res);
+    rb.PushRaw(enabled);
+}
+
+void SET_SYS::SetUserSystemClockAutomaticCorrectionEnabled(HLERequestContext& ctx) {
+    LOG_INFO(Service_SET, "called");
+
+    IPC::RequestParser rp{ctx};
+    auto enabled{rp.Pop<bool>()};
+
+    auto res = SetUserSystemClockAutomaticCorrectionEnabled(enabled);
+
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(res);
+}
+
 void SET_SYS::GetPrimaryAlbumStorage(HLERequestContext& ctx) {
     LOG_WARNING(Service_SET, "(STUBBED) called");
 
@@ -352,16 +609,18 @@ void SET_SYS::GetSleepSettings(HLERequestContext& ctx) {
 
     IPC::ResponseBuilder rb{ctx, 5};
     rb.Push(ResultSuccess);
-    rb.PushRaw(sleep_settings);
+    rb.PushRaw(m_system_settings.sleep_settings);
 }
 
 void SET_SYS::SetSleepSettings(HLERequestContext& ctx) {
     IPC::RequestParser rp{ctx};
-    sleep_settings = rp.PopRaw<SleepSettings>();
+    m_system_settings.sleep_settings = rp.PopRaw<SleepSettings>();
+    SetSaveNeeded();
 
     LOG_INFO(Service_SET, "called, flags={}, handheld_sleep_plan={}, console_sleep_plan={}",
-             sleep_settings.flags.raw, sleep_settings.handheld_sleep_plan,
-             sleep_settings.console_sleep_plan);
+             m_system_settings.sleep_settings.flags.raw,
+             m_system_settings.sleep_settings.handheld_sleep_plan,
+             m_system_settings.sleep_settings.console_sleep_plan);
 
     IPC::ResponseBuilder rb{ctx, 2};
     rb.Push(ResultSuccess);
@@ -371,15 +630,20 @@ void SET_SYS::GetInitialLaunchSettings(HLERequestContext& ctx) {
     LOG_INFO(Service_SET, "called");
     IPC::ResponseBuilder rb{ctx, 10};
     rb.Push(ResultSuccess);
-    rb.PushRaw(launch_settings);
+    rb.PushRaw(m_system_settings.initial_launch_settings_packed);
 }
 
 void SET_SYS::SetInitialLaunchSettings(HLERequestContext& ctx) {
     IPC::RequestParser rp{ctx};
-    launch_settings = rp.PopRaw<InitialLaunchSettings>();
+    auto inital_launch_settings = rp.PopRaw<InitialLaunchSettings>();
 
-    LOG_INFO(Service_SET, "called, flags={}, timestamp={}", launch_settings.flags.raw,
-             launch_settings.timestamp.time_point);
+    m_system_settings.initial_launch_settings_packed.flags = inital_launch_settings.flags;
+    m_system_settings.initial_launch_settings_packed.timestamp = inital_launch_settings.timestamp;
+    SetSaveNeeded();
+
+    LOG_INFO(Service_SET, "called, flags={}, timestamp={}",
+             m_system_settings.initial_launch_settings_packed.flags.raw,
+             m_system_settings.initial_launch_settings_packed.timestamp.time_point);
 
     IPC::ResponseBuilder rb{ctx, 2};
     rb.Push(ResultSuccess);
@@ -437,13 +701,37 @@ void SET_SYS::GetAutoUpdateEnableFlag(HLERequestContext& ctx) {
 void SET_SYS::GetBatteryPercentageFlag(HLERequestContext& ctx) {
     u8 battery_percentage_flag{1};
 
-    LOG_DEBUG(Service_SET, "(STUBBED) called, battery_percentage_flag={}", battery_percentage_flag);
+    LOG_WARNING(Service_SET, "(STUBBED) called, battery_percentage_flag={}",
+                battery_percentage_flag);
 
     IPC::ResponseBuilder rb{ctx, 3};
     rb.Push(ResultSuccess);
     rb.Push(battery_percentage_flag);
 }
 
+void SET_SYS::SetExternalSteadyClockInternalOffset(HLERequestContext& ctx) {
+    LOG_DEBUG(Service_SET, "called.");
+
+    IPC::RequestParser rp{ctx};
+    auto offset{rp.Pop<s64>()};
+
+    auto res = SetExternalSteadyClockInternalOffset(offset);
+
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(res);
+}
+
+void SET_SYS::GetExternalSteadyClockInternalOffset(HLERequestContext& ctx) {
+    LOG_DEBUG(Service_SET, "called.");
+
+    s64 offset{};
+    auto res = GetExternalSteadyClockInternalOffset(offset);
+
+    IPC::ResponseBuilder rb{ctx, 4};
+    rb.Push(res);
+    rb.Push(offset);
+}
+
 void SET_SYS::GetErrorReportSharePermission(HLERequestContext& ctx) {
     LOG_WARNING(Service_SET, "(STUBBED) called");
 
@@ -453,18 +741,19 @@ void SET_SYS::GetErrorReportSharePermission(HLERequestContext& ctx) {
 }
 
 void SET_SYS::GetAppletLaunchFlags(HLERequestContext& ctx) {
-    LOG_INFO(Service_SET, "called, applet_launch_flag={}", applet_launch_flag);
+    LOG_INFO(Service_SET, "called, applet_launch_flag={}", m_system_settings.applet_launch_flag);
 
     IPC::ResponseBuilder rb{ctx, 3};
     rb.Push(ResultSuccess);
-    rb.Push(applet_launch_flag);
+    rb.Push(m_system_settings.applet_launch_flag);
 }
 
 void SET_SYS::SetAppletLaunchFlags(HLERequestContext& ctx) {
     IPC::RequestParser rp{ctx};
-    applet_launch_flag = rp.Pop<u32>();
+    m_system_settings.applet_launch_flag = rp.Pop<u32>();
+    SetSaveNeeded();
 
-    LOG_INFO(Service_SET, "called, applet_launch_flag={}", applet_launch_flag);
+    LOG_INFO(Service_SET, "called, applet_launch_flag={}", m_system_settings.applet_launch_flag);
 
     IPC::ResponseBuilder rb{ctx, 2};
     rb.Push(ResultSuccess);
@@ -489,6 +778,52 @@ void SET_SYS::GetKeyboardLayout(HLERequestContext& ctx) {
     rb.Push(static_cast<u32>(selected_keyboard_layout));
 }
 
+void SET_SYS::GetDeviceTimeZoneLocationUpdatedTime(HLERequestContext& ctx) {
+    LOG_WARNING(Service_SET, "called.");
+
+    Service::Time::Clock::SteadyClockTimePoint time_point{};
+    auto res = GetDeviceTimeZoneLocationUpdatedTime(time_point);
+
+    IPC::ResponseBuilder rb{ctx, 4};
+    rb.Push(res);
+    rb.PushRaw<Service::Time::Clock::SteadyClockTimePoint>(time_point);
+}
+
+void SET_SYS::SetDeviceTimeZoneLocationUpdatedTime(HLERequestContext& ctx) {
+    LOG_WARNING(Service_SET, "called.");
+
+    IPC::RequestParser rp{ctx};
+    auto time_point{rp.PopRaw<Service::Time::Clock::SteadyClockTimePoint>()};
+
+    auto res = SetDeviceTimeZoneLocationUpdatedTime(time_point);
+
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(res);
+}
+
+void SET_SYS::GetUserSystemClockAutomaticCorrectionUpdatedTime(HLERequestContext& ctx) {
+    LOG_WARNING(Service_SET, "called.");
+
+    Service::Time::Clock::SteadyClockTimePoint time_point{};
+    auto res = GetUserSystemClockAutomaticCorrectionUpdatedTime(time_point);
+
+    IPC::ResponseBuilder rb{ctx, 4};
+    rb.Push(res);
+    rb.PushRaw<Service::Time::Clock::SteadyClockTimePoint>(time_point);
+}
+
+void SET_SYS::SetUserSystemClockAutomaticCorrectionUpdatedTime(HLERequestContext& ctx) {
+    LOG_WARNING(Service_SET, "called.");
+
+    IPC::RequestParser rp{ctx};
+    auto time_point{rp.PopRaw<Service::Time::Clock::SteadyClockTimePoint>()};
+
+    auto res = SetUserSystemClockAutomaticCorrectionUpdatedTime(time_point);
+
+    IPC::ResponseBuilder rb{ctx, 2};
+    rb.Push(res);
+}
+
 void SET_SYS::GetChineseTraditionalInputMethod(HLERequestContext& ctx) {
     LOG_WARNING(Service_SET, "(STUBBED) called");
 
@@ -508,7 +843,7 @@ void SET_SYS::GetHomeMenuScheme(HLERequestContext& ctx) {
         .extra = 0xFF000000,
     };
 
-    IPC::ResponseBuilder rb{ctx, 7};
+    IPC::ResponseBuilder rb{ctx, 2 + sizeof(HomeMenuScheme) / sizeof(u32)};
     rb.Push(ResultSuccess);
     rb.PushRaw(default_color);
 }
@@ -520,6 +855,7 @@ void SET_SYS::GetHomeMenuSchemeModel(HLERequestContext& ctx) {
     rb.Push(ResultSuccess);
     rb.Push(0);
 }
+
 void SET_SYS::GetFieldTestingFlag(HLERequestContext& ctx) {
     LOG_WARNING(Service_SET, "(STUBBED) called");
 
@@ -528,7 +864,7 @@ void SET_SYS::GetFieldTestingFlag(HLERequestContext& ctx) {
     rb.Push<u8>(false);
 }
 
-SET_SYS::SET_SYS(Core::System& system_) : ServiceFramework{system_, "set:sys"} {
+SET_SYS::SET_SYS(Core::System& system_) : ServiceFramework{system_, "set:sys"}, m_system{system} {
     // clang-format off
     static const FunctionInfo functions[] = {
         {0, &SET_SYS::SetLanguageCode, "SetLanguageCode"},
@@ -543,10 +879,10 @@ SET_SYS::SET_SYS(Core::System& system_) : ServiceFramework{system_, "set:sys"} {
         {10, nullptr, "SetBacklightSettings"},
         {11, nullptr, "SetBluetoothDevicesSettings"},
         {12, nullptr, "GetBluetoothDevicesSettings"},
-        {13, nullptr, "GetExternalSteadyClockSourceId"},
-        {14, nullptr, "SetExternalSteadyClockSourceId"},
-        {15, nullptr, "GetUserSystemClockContext"},
-        {16, nullptr, "SetUserSystemClockContext"},
+        {13, &SET_SYS::GetExternalSteadyClockSourceId, "GetExternalSteadyClockSourceId"},
+        {14, &SET_SYS::SetExternalSteadyClockSourceId, "SetExternalSteadyClockSourceId"},
+        {15, &SET_SYS::GetUserSystemClockContext, "GetUserSystemClockContext"},
+        {16, &SET_SYS::SetUserSystemClockContext, "SetUserSystemClockContext"},
         {17, &SET_SYS::GetAccountSettings, "GetAccountSettings"},
         {18, &SET_SYS::SetAccountSettings, "SetAccountSettings"},
         {19, nullptr, "GetAudioVolume"},
@@ -581,15 +917,15 @@ SET_SYS::SET_SYS(Core::System& system_) : ServiceFramework{system_, "set:sys"} {
         {50, nullptr, "SetDataDeletionSettings"},
         {51, nullptr, "GetInitialSystemAppletProgramId"},
         {52, nullptr, "GetOverlayDispProgramId"},
-        {53, nullptr, "GetDeviceTimeZoneLocationName"},
-        {54, nullptr, "SetDeviceTimeZoneLocationName"},
+        {53, &SET_SYS::GetDeviceTimeZoneLocationName, "GetDeviceTimeZoneLocationName"},
+        {54, &SET_SYS::SetDeviceTimeZoneLocationName, "SetDeviceTimeZoneLocationName"},
         {55, nullptr, "GetWirelessCertificationFileSize"},
         {56, nullptr, "GetWirelessCertificationFile"},
         {57, &SET_SYS::SetRegionCode, "SetRegionCode"},
-        {58, nullptr, "GetNetworkSystemClockContext"},
-        {59, nullptr, "SetNetworkSystemClockContext"},
-        {60, nullptr, "IsUserSystemClockAutomaticCorrectionEnabled"},
-        {61, nullptr, "SetUserSystemClockAutomaticCorrectionEnabled"},
+        {58, &SET_SYS::GetNetworkSystemClockContext, "GetNetworkSystemClockContext"},
+        {59, &SET_SYS::SetNetworkSystemClockContext, "SetNetworkSystemClockContext"},
+        {60, &SET_SYS::IsUserSystemClockAutomaticCorrectionEnabled, "IsUserSystemClockAutomaticCorrectionEnabled"},
+        {61, &SET_SYS::SetUserSystemClockAutomaticCorrectionEnabled, "SetUserSystemClockAutomaticCorrectionEnabled"},
         {62, nullptr, "GetDebugModeFlag"},
         {63, &SET_SYS::GetPrimaryAlbumStorage, "GetPrimaryAlbumStorage"},
         {64, nullptr, "SetPrimaryAlbumStorage"},
@@ -633,8 +969,8 @@ SET_SYS::SET_SYS(Core::System& system_) : ServiceFramework{system_, "set:sys"} {
         {102, nullptr, "SetExternalRtcResetFlag"},
         {103, nullptr, "GetUsbFullKeyEnableFlag"},
         {104, nullptr, "SetUsbFullKeyEnableFlag"},
-        {105, nullptr, "SetExternalSteadyClockInternalOffset"},
-        {106, nullptr, "GetExternalSteadyClockInternalOffset"},
+        {105, &SET_SYS::SetExternalSteadyClockInternalOffset, "SetExternalSteadyClockInternalOffset"},
+        {106, &SET_SYS::GetExternalSteadyClockInternalOffset, "GetExternalSteadyClockInternalOffset"},
         {107, nullptr, "GetBacklightSettingsEx"},
         {108, nullptr, "SetBacklightSettingsEx"},
         {109, nullptr, "GetHeadphoneVolumeWarningCount"},
@@ -678,10 +1014,10 @@ SET_SYS::SET_SYS(Core::System& system_) : ServiceFramework{system_, "set:sys"} {
         {147, nullptr, "GetConsoleSixAxisSensorAngularAcceleration"},
         {148, nullptr, "SetConsoleSixAxisSensorAngularAcceleration"},
         {149, nullptr, "GetRebootlessSystemUpdateVersion"},
-        {150, nullptr, "GetDeviceTimeZoneLocationUpdatedTime"},
-        {151, nullptr, "SetDeviceTimeZoneLocationUpdatedTime"},
-        {152, nullptr, "GetUserSystemClockAutomaticCorrectionUpdatedTime"},
-        {153, nullptr, "SetUserSystemClockAutomaticCorrectionUpdatedTime"},
+        {150, &SET_SYS::GetDeviceTimeZoneLocationUpdatedTime, "GetDeviceTimeZoneLocationUpdatedTime"},
+        {151, &SET_SYS::SetDeviceTimeZoneLocationUpdatedTime, "SetDeviceTimeZoneLocationUpdatedTime"},
+        {152, &SET_SYS::GetUserSystemClockAutomaticCorrectionUpdatedTime, "GetUserSystemClockAutomaticCorrectionUpdatedTime"},
+        {153, &SET_SYS::SetUserSystemClockAutomaticCorrectionUpdatedTime, "SetUserSystemClockAutomaticCorrectionUpdatedTime"},
         {154, nullptr, "GetAccountOnlineStorageSettings"},
         {155, nullptr, "SetAccountOnlineStorageSettings"},
         {156, nullptr, "GetPctlReadyFlag"},
@@ -743,8 +1079,184 @@ SET_SYS::SET_SYS(Core::System& system_) : ServiceFramework{system_, "set:sys"} {
     // clang-format on
 
     RegisterHandlers(functions);
+
+    SetupSettings();
+    m_save_thread =
+        std::jthread([this](std::stop_token stop_token) { StoreSettingsThreadFunc(stop_token); });
+}
+
+SET_SYS::~SET_SYS() {
+    SetSaveNeeded();
+    m_save_thread.request_stop();
+}
+
+void SET_SYS::SetupSettings() {
+    auto system_dir =
+        Common::FS::GetYuzuPath(Common::FS::YuzuPath::NANDDir) / "system/save/8000000000000050";
+    if (!LoadSettingsFile(system_dir, []() { return DefaultSystemSettings(); })) {
+        ASSERT(false);
+    }
+
+    auto private_dir =
+        Common::FS::GetYuzuPath(Common::FS::YuzuPath::NANDDir) / "system/save/8000000000000052";
+    if (!LoadSettingsFile(private_dir, []() { return DefaultPrivateSettings(); })) {
+        ASSERT(false);
+    }
+
+    auto device_dir =
+        Common::FS::GetYuzuPath(Common::FS::YuzuPath::NANDDir) / "system/save/8000000000000053";
+    if (!LoadSettingsFile(device_dir, []() { return DefaultDeviceSettings(); })) {
+        ASSERT(false);
+    }
+
+    auto appln_dir =
+        Common::FS::GetYuzuPath(Common::FS::YuzuPath::NANDDir) / "system/save/8000000000000054";
+    if (!LoadSettingsFile(appln_dir, []() { return DefaultApplnSettings(); })) {
+        ASSERT(false);
+    }
+}
+
+void SET_SYS::StoreSettings() {
+    auto system_dir =
+        Common::FS::GetYuzuPath(Common::FS::YuzuPath::NANDDir) / "system/save/8000000000000050";
+    if (!StoreSettingsFile(system_dir, m_system_settings)) {
+        LOG_ERROR(HW_GPU, "Failed to store System settings");
+    }
+
+    auto private_dir =
+        Common::FS::GetYuzuPath(Common::FS::YuzuPath::NANDDir) / "system/save/8000000000000052";
+    if (!StoreSettingsFile(private_dir, m_private_settings)) {
+        LOG_ERROR(HW_GPU, "Failed to store Private settings");
+    }
+
+    auto device_dir =
+        Common::FS::GetYuzuPath(Common::FS::YuzuPath::NANDDir) / "system/save/8000000000000053";
+    if (!StoreSettingsFile(device_dir, m_device_settings)) {
+        LOG_ERROR(HW_GPU, "Failed to store Device settings");
+    }
+
+    auto appln_dir =
+        Common::FS::GetYuzuPath(Common::FS::YuzuPath::NANDDir) / "system/save/8000000000000054";
+    if (!StoreSettingsFile(appln_dir, m_appln_settings)) {
+        LOG_ERROR(HW_GPU, "Failed to store ApplLn settings");
+    }
+}
+
+void SET_SYS::StoreSettingsThreadFunc(std::stop_token stop_token) {
+    while (Common::StoppableTimedWait(stop_token, std::chrono::minutes(1))) {
+        std::scoped_lock l{m_save_needed_mutex};
+        if (!std::exchange(m_save_needed, false)) {
+            continue;
+        }
+        StoreSettings();
+    }
+}
+
+void SET_SYS::SetSaveNeeded() {
+    std::scoped_lock l{m_save_needed_mutex};
+    m_save_needed = true;
+}
+
+Result SET_SYS::GetSettingsItemValue(std::vector<u8>& out_value, const std::string& category,
+                                     const std::string& name) {
+    auto settings{GetSettings()};
+    R_UNLESS(settings.contains(category) && settings[category].contains(name), ResultUnknown);
+
+    out_value = settings[category][name];
+    R_SUCCEED();
+}
+
+Result SET_SYS::GetExternalSteadyClockSourceId(Common::UUID& out_id) {
+    out_id = m_private_settings.external_clock_source_id;
+    R_SUCCEED();
+}
+
+Result SET_SYS::SetExternalSteadyClockSourceId(Common::UUID id) {
+    m_private_settings.external_clock_source_id = id;
+    SetSaveNeeded();
+    R_SUCCEED();
+}
+
+Result SET_SYS::GetUserSystemClockContext(Service::Time::Clock::SystemClockContext& out_context) {
+    out_context = m_system_settings.user_system_clock_context;
+    R_SUCCEED();
 }
 
-SET_SYS::~SET_SYS() = default;
+Result SET_SYS::SetUserSystemClockContext(Service::Time::Clock::SystemClockContext& context) {
+    m_system_settings.user_system_clock_context = context;
+    SetSaveNeeded();
+    R_SUCCEED();
+}
+
+Result SET_SYS::GetDeviceTimeZoneLocationName(Service::Time::TimeZone::LocationName& out_name) {
+    out_name = m_system_settings.device_time_zone_location_name;
+    R_SUCCEED();
+}
+
+Result SET_SYS::SetDeviceTimeZoneLocationName(Service::Time::TimeZone::LocationName& name) {
+    m_system_settings.device_time_zone_location_name = name;
+    SetSaveNeeded();
+    R_SUCCEED();
+}
+
+Result SET_SYS::GetNetworkSystemClockContext(
+    Service::Time::Clock::SystemClockContext& out_context) {
+    out_context = m_system_settings.network_system_clock_context;
+    R_SUCCEED();
+}
+
+Result SET_SYS::SetNetworkSystemClockContext(Service::Time::Clock::SystemClockContext& context) {
+    m_system_settings.network_system_clock_context = context;
+    SetSaveNeeded();
+    R_SUCCEED();
+}
+
+Result SET_SYS::IsUserSystemClockAutomaticCorrectionEnabled(bool& out_enabled) {
+    out_enabled = m_system_settings.user_system_clock_automatic_correction_enabled;
+    R_SUCCEED();
+}
+
+Result SET_SYS::SetUserSystemClockAutomaticCorrectionEnabled(bool enabled) {
+    m_system_settings.user_system_clock_automatic_correction_enabled = enabled;
+    SetSaveNeeded();
+    R_SUCCEED();
+}
+
+Result SET_SYS::SetExternalSteadyClockInternalOffset(s64 offset) {
+    m_private_settings.external_steady_clock_internal_offset = offset;
+    SetSaveNeeded();
+    R_SUCCEED();
+}
+
+Result SET_SYS::GetExternalSteadyClockInternalOffset(s64& out_offset) {
+    out_offset = m_private_settings.external_steady_clock_internal_offset;
+    R_SUCCEED();
+}
+
+Result SET_SYS::GetDeviceTimeZoneLocationUpdatedTime(
+    Service::Time::Clock::SteadyClockTimePoint& out_time_point) {
+    out_time_point = m_system_settings.device_time_zone_location_updated_time;
+    R_SUCCEED();
+}
+
+Result SET_SYS::SetDeviceTimeZoneLocationUpdatedTime(
+    Service::Time::Clock::SteadyClockTimePoint& time_point) {
+    m_system_settings.device_time_zone_location_updated_time = time_point;
+    SetSaveNeeded();
+    R_SUCCEED();
+}
+
+Result SET_SYS::GetUserSystemClockAutomaticCorrectionUpdatedTime(
+    Service::Time::Clock::SteadyClockTimePoint& out_time_point) {
+    out_time_point = m_system_settings.user_system_clock_automatic_correction_updated_time_point;
+    R_SUCCEED();
+}
+
+Result SET_SYS::SetUserSystemClockAutomaticCorrectionUpdatedTime(
+    Service::Time::Clock::SteadyClockTimePoint out_time_point) {
+    m_system_settings.user_system_clock_automatic_correction_updated_time_point = out_time_point;
+    SetSaveNeeded();
+    R_SUCCEED();
+}
 
 } // namespace Service::Set
diff --git a/src/core/hle/service/set/set_sys.h b/src/core/hle/service/set/set_sys.h
index 5f770fd32..3785d93d8 100644
--- a/src/core/hle/service/set/set_sys.h
+++ b/src/core/hle/service/set/set_sys.h
@@ -3,17 +3,27 @@
 
 #pragma once
 
+#include <filesystem>
+#include <mutex>
+#include <string>
+#include <thread>
+
+#include "common/polyfill_thread.h"
 #include "common/uuid.h"
 #include "core/hle/result.h"
 #include "core/hle/service/service.h"
+#include "core/hle/service/set/appln_settings.h"
+#include "core/hle/service/set/device_settings.h"
+#include "core/hle/service/set/private_settings.h"
+#include "core/hle/service/set/system_settings.h"
 #include "core/hle/service/time/clock_types.h"
+#include "core/hle/service/time/time_zone_types.h"
 
 namespace Core {
 class System;
 }
 
 namespace Service::Set {
-enum class LanguageCode : u64;
 enum class GetFirmwareVersionType {
     Version1,
     Version2,
@@ -42,270 +52,38 @@ public:
     explicit SET_SYS(Core::System& system_);
     ~SET_SYS() override;
 
-private:
-    /// Indicates the current theme set by the system settings
-    enum class ColorSet : u32 {
-        BasicWhite = 0,
-        BasicBlack = 1,
-    };
-
-    /// Indicates the current console is a retail or kiosk unit
-    enum class QuestFlag : u8 {
-        Retail = 0,
-        Kiosk = 1,
-    };
-
-    /// This is nn::settings::system::TvResolution
-    enum class TvResolution : u32 {
-        Auto,
-        Resolution1080p,
-        Resolution720p,
-        Resolution480p,
-    };
-
-    /// This is nn::settings::system::HdmiContentType
-    enum class HdmiContentType : u32 {
-        None,
-        Graphics,
-        Cinema,
-        Photo,
-        Game,
-    };
-
-    /// This is nn::settings::system::RgbRange
-    enum class RgbRange : u32 {
-        Auto,
-        Full,
-        Limited,
-    };
-
-    /// This is nn::settings::system::CmuMode
-    enum class CmuMode : u32 {
-        None,
-        ColorInvert,
-        HighContrast,
-        GrayScale,
-    };
-
-    /// This is nn::settings::system::PrimaryAlbumStorage
-    enum class PrimaryAlbumStorage : u32 {
-        Nand,
-        SdCard,
-    };
-
-    /// This is nn::settings::system::NotificationVolume
-    enum class NotificationVolume : u32 {
-        Mute,
-        Low,
-        High,
-    };
-
-    /// This is nn::settings::system::ChineseTraditionalInputMethod
-    enum class ChineseTraditionalInputMethod : u32 {
-        Unknown0 = 0,
-        Unknown1 = 1,
-        Unknown2 = 2,
-    };
-
-    /// This is nn::settings::system::ErrorReportSharePermission
-    enum class ErrorReportSharePermission : u32 {
-        NotConfirmed,
-        Granted,
-        Denied,
-    };
-
-    /// This is nn::settings::system::FriendPresenceOverlayPermission
-    enum class FriendPresenceOverlayPermission : u8 {
-        NotConfirmed,
-        NoDisplay,
-        FavoriteFriends,
-        Friends,
-    };
-
-    /// This is nn::settings::system::HandheldSleepPlan
-    enum class HandheldSleepPlan : u32 {
-        Sleep1Min,
-        Sleep3Min,
-        Sleep5Min,
-        Sleep10Min,
-        Sleep30Min,
-        Never,
-    };
-
-    /// This is nn::settings::system::ConsoleSleepPlan
-    enum class ConsoleSleepPlan : u32 {
-        Sleep1Hour,
-        Sleep2Hour,
-        Sleep3Hour,
-        Sleep6Hour,
-        Sleep12Hour,
-        Never,
-    };
-
-    /// This is nn::settings::system::RegionCode
-    enum class RegionCode : u32 {
-        Japan,
-        Usa,
-        Europe,
-        Australia,
-        HongKongTaiwanKorea,
-        China,
-    };
-
-    /// This is nn::settings::system::EulaVersionClockType
-    enum class EulaVersionClockType : u32 {
-        NetworkSystemClock,
-        SteadyClock,
-    };
-
-    /// This is nn::settings::system::SleepFlag
-    struct SleepFlag {
-        union {
-            u32 raw{};
-
-            BitField<0, 1, u32> SleepsWhilePlayingMedia;
-            BitField<1, 1, u32> WakesAtPowerStateChange;
-        };
-    };
-    static_assert(sizeof(SleepFlag) == 4, "TvFlag is an invalid size");
-
-    /// This is nn::settings::system::TvFlag
-    struct TvFlag {
-        union {
-            u32 raw{};
-
-            BitField<0, 1, u32> Allows4k;
-            BitField<1, 1, u32> Allows3d;
-            BitField<2, 1, u32> AllowsCec;
-            BitField<3, 1, u32> PreventsScreenBurnIn;
-        };
-    };
-    static_assert(sizeof(TvFlag) == 4, "TvFlag is an invalid size");
-
-    /// This is nn::settings::system::InitialLaunchFlag
-    struct InitialLaunchFlag {
-        union {
-            u32 raw{};
-
-            BitField<0, 1, u32> InitialLaunchCompletionFlag;
-            BitField<8, 1, u32> InitialLaunchUserAdditionFlag;
-            BitField<16, 1, u32> InitialLaunchTimestampFlag;
-        };
-    };
-    static_assert(sizeof(InitialLaunchFlag) == 4, "InitialLaunchFlag is an invalid size");
-
-    /// This is nn::settings::system::NotificationFlag
-    struct NotificationFlag {
-        union {
-            u32 raw{};
-
-            BitField<0, 1, u32> RingtoneFlag;
-            BitField<1, 1, u32> DownloadCompletionFlag;
-            BitField<8, 1, u32> EnablesNews;
-            BitField<9, 1, u32> IncomingLampFlag;
-        };
-    };
-    static_assert(sizeof(NotificationFlag) == 4, "NotificationFlag is an invalid size");
-
-    /// This is nn::settings::system::AccountNotificationFlag
-    struct AccountNotificationFlag {
-        union {
-            u32 raw{};
-
-            BitField<0, 1, u32> FriendOnlineFlag;
-            BitField<1, 1, u32> FriendRequestFlag;
-            BitField<8, 1, u32> CoralInvitationFlag;
-        };
-    };
-    static_assert(sizeof(AccountNotificationFlag) == 4,
-                  "AccountNotificationFlag is an invalid size");
-
-    /// This is nn::settings::system::TvSettings
-    struct TvSettings {
-        TvFlag flags;
-        TvResolution tv_resolution;
-        HdmiContentType hdmi_content_type;
-        RgbRange rgb_range;
-        CmuMode cmu_mode;
-        u32 tv_underscan;
-        f32 tv_gama;
-        f32 constrast_ratio;
-    };
-    static_assert(sizeof(TvSettings) == 0x20, "TvSettings is an invalid size");
-
-    /// This is nn::settings::system::NotificationTime
-    struct NotificationTime {
-        u32 hour;
-        u32 minute;
-    };
-    static_assert(sizeof(NotificationTime) == 0x8, "NotificationTime is an invalid size");
-
-    /// This is nn::settings::system::NotificationSettings
-    struct NotificationSettings {
-        NotificationFlag flags;
-        NotificationVolume volume;
-        NotificationTime start_time;
-        NotificationTime stop_time;
-    };
-    static_assert(sizeof(NotificationSettings) == 0x18, "NotificationSettings is an invalid size");
-
-    /// This is nn::settings::system::AccountSettings
-    struct AccountSettings {
-        u32 flags;
-    };
-    static_assert(sizeof(AccountSettings) == 0x4, "AccountSettings is an invalid size");
-
-    /// This is nn::settings::system::AccountNotificationSettings
-    struct AccountNotificationSettings {
-        Common::UUID uid;
-        AccountNotificationFlag flags;
-        FriendPresenceOverlayPermission friend_presence_permission;
-        FriendPresenceOverlayPermission friend_invitation_permission;
-        INSERT_PADDING_BYTES(0x2);
-    };
-    static_assert(sizeof(AccountNotificationSettings) == 0x18,
-                  "AccountNotificationSettings is an invalid size");
-
-    /// This is nn::settings::system::InitialLaunchSettings
-    struct SleepSettings {
-        SleepFlag flags;
-        HandheldSleepPlan handheld_sleep_plan;
-        ConsoleSleepPlan console_sleep_plan;
-    };
-    static_assert(sizeof(SleepSettings) == 0xc, "SleepSettings is incorrect size");
-
-    /// This is nn::settings::system::InitialLaunchSettings
-    struct InitialLaunchSettings {
-        InitialLaunchFlag flags;
-        INSERT_PADDING_BYTES(0x4);
-        Time::Clock::SteadyClockTimePoint timestamp;
-    };
-    static_assert(sizeof(InitialLaunchSettings) == 0x20, "InitialLaunchSettings is incorrect size");
-
-    /// This is nn::settings::system::InitialLaunchSettings
-    struct EulaVersion {
-        u32 version;
-        RegionCode region_code;
-        EulaVersionClockType clock_type;
-        INSERT_PADDING_BYTES(0x4);
-        s64 posix_time;
-        Time::Clock::SteadyClockTimePoint timestamp;
-    };
-    static_assert(sizeof(EulaVersion) == 0x30, "EulaVersion is incorrect size");
-
-    /// This is nn::settings::system::HomeMenuScheme
-    struct HomeMenuScheme {
-        u32 main;
-        u32 back;
-        u32 sub;
-        u32 bezel;
-        u32 extra;
-    };
-    static_assert(sizeof(HomeMenuScheme) == 0x14, "HomeMenuScheme is incorrect size");
+    Result GetSettingsItemValue(std::vector<u8>& out_value, const std::string& category,
+                                const std::string& name);
+
+    Result GetExternalSteadyClockSourceId(Common::UUID& out_id);
+    Result SetExternalSteadyClockSourceId(Common::UUID id);
+    Result GetUserSystemClockContext(Service::Time::Clock::SystemClockContext& out_context);
+    Result SetUserSystemClockContext(Service::Time::Clock::SystemClockContext& context);
+    Result GetDeviceTimeZoneLocationName(Service::Time::TimeZone::LocationName& out_name);
+    Result SetDeviceTimeZoneLocationName(Service::Time::TimeZone::LocationName& name);
+    Result GetNetworkSystemClockContext(Service::Time::Clock::SystemClockContext& out_context);
+    Result SetNetworkSystemClockContext(Service::Time::Clock::SystemClockContext& context);
+    Result IsUserSystemClockAutomaticCorrectionEnabled(bool& out_enabled);
+    Result SetUserSystemClockAutomaticCorrectionEnabled(bool enabled);
+    Result SetExternalSteadyClockInternalOffset(s64 offset);
+    Result GetExternalSteadyClockInternalOffset(s64& out_offset);
+    Result GetDeviceTimeZoneLocationUpdatedTime(
+        Service::Time::Clock::SteadyClockTimePoint& out_time_point);
+    Result SetDeviceTimeZoneLocationUpdatedTime(
+        Service::Time::Clock::SteadyClockTimePoint& time_point);
+    Result GetUserSystemClockAutomaticCorrectionUpdatedTime(
+        Service::Time::Clock::SteadyClockTimePoint& out_time_point);
+    Result SetUserSystemClockAutomaticCorrectionUpdatedTime(
+        Service::Time::Clock::SteadyClockTimePoint time_point);
 
+private:
     void SetLanguageCode(HLERequestContext& ctx);
     void GetFirmwareVersion(HLERequestContext& ctx);
     void GetFirmwareVersion2(HLERequestContext& ctx);
+    void GetExternalSteadyClockSourceId(HLERequestContext& ctx);
+    void SetExternalSteadyClockSourceId(HLERequestContext& ctx);
+    void GetUserSystemClockContext(HLERequestContext& ctx);
+    void SetUserSystemClockContext(HLERequestContext& ctx);
     void GetAccountSettings(HLERequestContext& ctx);
     void SetAccountSettings(HLERequestContext& ctx);
     void GetEulaVersions(HLERequestContext& ctx);
@@ -321,7 +99,13 @@ private:
     void GetTvSettings(HLERequestContext& ctx);
     void SetTvSettings(HLERequestContext& ctx);
     void GetQuestFlag(HLERequestContext& ctx);
+    void GetDeviceTimeZoneLocationName(HLERequestContext& ctx);
+    void SetDeviceTimeZoneLocationName(HLERequestContext& ctx);
     void SetRegionCode(HLERequestContext& ctx);
+    void GetNetworkSystemClockContext(HLERequestContext& ctx);
+    void SetNetworkSystemClockContext(HLERequestContext& ctx);
+    void IsUserSystemClockAutomaticCorrectionEnabled(HLERequestContext& ctx);
+    void SetUserSystemClockAutomaticCorrectionEnabled(HLERequestContext& ctx);
     void GetPrimaryAlbumStorage(HLERequestContext& ctx);
     void GetSleepSettings(HLERequestContext& ctx);
     void SetSleepSettings(HLERequestContext& ctx);
@@ -333,59 +117,36 @@ private:
     void GetMiiAuthorId(HLERequestContext& ctx);
     void GetAutoUpdateEnableFlag(HLERequestContext& ctx);
     void GetBatteryPercentageFlag(HLERequestContext& ctx);
+    void SetExternalSteadyClockInternalOffset(HLERequestContext& ctx);
+    void GetExternalSteadyClockInternalOffset(HLERequestContext& ctx);
     void GetErrorReportSharePermission(HLERequestContext& ctx);
     void GetAppletLaunchFlags(HLERequestContext& ctx);
     void SetAppletLaunchFlags(HLERequestContext& ctx);
     void GetKeyboardLayout(HLERequestContext& ctx);
+    void GetDeviceTimeZoneLocationUpdatedTime(HLERequestContext& ctx);
+    void SetDeviceTimeZoneLocationUpdatedTime(HLERequestContext& ctx);
+    void GetUserSystemClockAutomaticCorrectionUpdatedTime(HLERequestContext& ctx);
+    void SetUserSystemClockAutomaticCorrectionUpdatedTime(HLERequestContext& ctx);
     void GetChineseTraditionalInputMethod(HLERequestContext& ctx);
-    void GetFieldTestingFlag(HLERequestContext& ctx);
     void GetHomeMenuScheme(HLERequestContext& ctx);
     void GetHomeMenuSchemeModel(HLERequestContext& ctx);
+    void GetFieldTestingFlag(HLERequestContext& ctx);
 
-    AccountSettings account_settings{
-        .flags = {},
-    };
-
-    ColorSet color_set = ColorSet::BasicWhite;
-
-    NotificationSettings notification_settings{
-        .flags = {0x300},
-        .volume = NotificationVolume::High,
-        .start_time = {.hour = 9, .minute = 0},
-        .stop_time = {.hour = 21, .minute = 0},
-    };
-
-    std::vector<AccountNotificationSettings> account_notifications{};
-
-    TvSettings tv_settings{
-        .flags = {0xc},
-        .tv_resolution = TvResolution::Auto,
-        .hdmi_content_type = HdmiContentType::Game,
-        .rgb_range = RgbRange::Auto,
-        .cmu_mode = CmuMode::None,
-        .tv_underscan = {},
-        .tv_gama = 1.0f,
-        .constrast_ratio = 0.5f,
-    };
-
-    InitialLaunchSettings launch_settings{
-        .flags = {0x10001},
-        .timestamp = {},
-    };
-
-    SleepSettings sleep_settings{
-        .flags = {0x3},
-        .handheld_sleep_plan = HandheldSleepPlan::Sleep10Min,
-        .console_sleep_plan = ConsoleSleepPlan::Sleep1Hour,
-    };
-
-    u32 applet_launch_flag{};
-
-    std::vector<EulaVersion> eula_versions{};
-
-    RegionCode region_code;
-
-    LanguageCode language_code_setting;
+    bool LoadSettingsFile(std::filesystem::path& path, auto&& default_func);
+    bool StoreSettingsFile(std::filesystem::path& path, auto& settings);
+    void SetupSettings();
+    void StoreSettings();
+    void StoreSettingsThreadFunc(std::stop_token stop_token);
+    void SetSaveNeeded();
+
+    Core::System& m_system;
+    SystemSettings m_system_settings{};
+    PrivateSettings m_private_settings{};
+    DeviceSettings m_device_settings{};
+    ApplnSettings m_appln_settings{};
+    std::jthread m_save_thread;
+    std::mutex m_save_needed_mutex;
+    bool m_save_needed{false};
 };
 
 } // namespace Service::Set
diff --git a/src/core/hle/service/set/system_settings.cpp b/src/core/hle/service/set/system_settings.cpp
new file mode 100644
index 000000000..2723417ad
--- /dev/null
+++ b/src/core/hle/service/set/system_settings.cpp
@@ -0,0 +1,51 @@
+// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "core/hle/service/set/system_settings.h"
+
+namespace Service::Set {
+
+SystemSettings DefaultSystemSettings() {
+    SystemSettings settings{};
+
+    settings.version = 0x140000;
+    settings.flags = 7;
+
+    settings.color_set_id = ColorSet::BasicWhite;
+
+    settings.notification_settings = {
+        .flags{0x300},
+        .volume = NotificationVolume::High,
+        .start_time = {.hour = 9, .minute = 0},
+        .stop_time = {.hour = 21, .minute = 0},
+    };
+
+    settings.tv_settings = {
+        .flags = {0xC},
+        .tv_resolution = TvResolution::Auto,
+        .hdmi_content_type = HdmiContentType::Game,
+        .rgb_range = RgbRange::Auto,
+        .cmu_mode = CmuMode::None,
+        .tv_underscan = {},
+        .tv_gama = 1.0f,
+        .constrast_ratio = 0.5f,
+    };
+
+    settings.initial_launch_settings_packed = {
+        .flags = {0x10001},
+        .timestamp = {},
+    };
+
+    settings.sleep_settings = {
+        .flags = {0x3},
+        .handheld_sleep_plan = HandheldSleepPlan::Sleep10Min,
+        .console_sleep_plan = ConsoleSleepPlan::Sleep1Hour,
+    };
+
+    settings.device_time_zone_location_name = {"UTC"};
+    settings.user_system_clock_automatic_correction_enabled = false;
+
+    return settings;
+}
+
+} // namespace Service::Set
diff --git a/src/core/hle/service/set/system_settings.h b/src/core/hle/service/set/system_settings.h
new file mode 100644
index 000000000..ded2906ad
--- /dev/null
+++ b/src/core/hle/service/set/system_settings.h
@@ -0,0 +1,699 @@
+// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <array>
+
+#include "common/bit_field.h"
+#include "common/common_funcs.h"
+#include "common/common_types.h"
+#include "core/hle/service/set/private_settings.h"
+#include "core/hle/service/time/clock_types.h"
+
+namespace Service::Set {
+
+/// This is "nn::settings::LanguageCode", which is a NUL-terminated string stored in a u64.
+enum class LanguageCode : u64 {
+    JA = 0x000000000000616A,
+    EN_US = 0x00000053552D6E65,
+    FR = 0x0000000000007266,
+    DE = 0x0000000000006564,
+    IT = 0x0000000000007469,
+    ES = 0x0000000000007365,
+    ZH_CN = 0x0000004E432D687A,
+    KO = 0x0000000000006F6B,
+    NL = 0x0000000000006C6E,
+    PT = 0x0000000000007470,
+    RU = 0x0000000000007572,
+    ZH_TW = 0x00000057542D687A,
+    EN_GB = 0x00000042472D6E65,
+    FR_CA = 0x00000041432D7266,
+    ES_419 = 0x00003931342D7365,
+    ZH_HANS = 0x00736E61482D687A,
+    ZH_HANT = 0x00746E61482D687A,
+    PT_BR = 0x00000052422D7470,
+};
+
+/// This is nn::settings::system::ErrorReportSharePermission
+enum class ErrorReportSharePermission : u32 {
+    NotConfirmed,
+    Granted,
+    Denied,
+};
+
+/// This is nn::settings::system::ChineseTraditionalInputMethod
+enum class ChineseTraditionalInputMethod : u32 {
+    Unknown0 = 0,
+    Unknown1 = 1,
+    Unknown2 = 2,
+};
+
+/// This is nn::settings::system::HomeMenuScheme
+struct HomeMenuScheme {
+    u32 main;
+    u32 back;
+    u32 sub;
+    u32 bezel;
+    u32 extra;
+};
+static_assert(sizeof(HomeMenuScheme) == 0x14, "HomeMenuScheme is incorrect size");
+
+/// Indicates the current theme set by the system settings
+enum class ColorSet : u32 {
+    BasicWhite = 0,
+    BasicBlack = 1,
+};
+
+/// Indicates the current console is a retail or kiosk unit
+enum class QuestFlag : u8 {
+    Retail = 0,
+    Kiosk = 1,
+};
+
+/// This is nn::settings::system::RegionCode
+enum class RegionCode : u32 {
+    Japan,
+    Usa,
+    Europe,
+    Australia,
+    HongKongTaiwanKorea,
+    China,
+};
+
+/// This is nn::settings::system::AccountSettings
+struct AccountSettings {
+    u32 flags;
+};
+static_assert(sizeof(AccountSettings) == 4, "AccountSettings is an invalid size");
+
+/// This is nn::settings::system::NotificationVolume
+enum class NotificationVolume : u32 {
+    Mute,
+    Low,
+    High,
+};
+
+/// This is nn::settings::system::NotificationFlag
+struct NotificationFlag {
+    union {
+        u32 raw{};
+
+        BitField<0, 1, u32> RingtoneFlag;
+        BitField<1, 1, u32> DownloadCompletionFlag;
+        BitField<8, 1, u32> EnablesNews;
+        BitField<9, 1, u32> IncomingLampFlag;
+    };
+};
+static_assert(sizeof(NotificationFlag) == 4, "NotificationFlag is an invalid size");
+
+/// This is nn::settings::system::NotificationTime
+struct NotificationTime {
+    u32 hour;
+    u32 minute;
+};
+static_assert(sizeof(NotificationTime) == 0x8, "NotificationTime is an invalid size");
+
+/// This is nn::settings::system::NotificationSettings
+struct NotificationSettings {
+    NotificationFlag flags;
+    NotificationVolume volume;
+    NotificationTime start_time;
+    NotificationTime stop_time;
+};
+static_assert(sizeof(NotificationSettings) == 0x18, "NotificationSettings is an invalid size");
+
+/// This is nn::settings::system::AccountNotificationFlag
+struct AccountNotificationFlag {
+    union {
+        u32 raw{};
+
+        BitField<0, 1, u32> FriendOnlineFlag;
+        BitField<1, 1, u32> FriendRequestFlag;
+        BitField<8, 1, u32> CoralInvitationFlag;
+    };
+};
+static_assert(sizeof(AccountNotificationFlag) == 4, "AccountNotificationFlag is an invalid size");
+
+/// This is nn::settings::system::FriendPresenceOverlayPermission
+enum class FriendPresenceOverlayPermission : u8 {
+    NotConfirmed,
+    NoDisplay,
+    FavoriteFriends,
+    Friends,
+};
+
+/// This is nn::settings::system::AccountNotificationSettings
+struct AccountNotificationSettings {
+    Common::UUID uid;
+    AccountNotificationFlag flags;
+    FriendPresenceOverlayPermission friend_presence_permission;
+    FriendPresenceOverlayPermission friend_invitation_permission;
+    INSERT_PADDING_BYTES(0x2);
+};
+static_assert(sizeof(AccountNotificationSettings) == 0x18,
+              "AccountNotificationSettings is an invalid size");
+
+/// This is nn::settings::system::TvFlag
+struct TvFlag {
+    union {
+        u32 raw{};
+
+        BitField<0, 1, u32> Allows4k;
+        BitField<1, 1, u32> Allows3d;
+        BitField<2, 1, u32> AllowsCec;
+        BitField<3, 1, u32> PreventsScreenBurnIn;
+    };
+};
+static_assert(sizeof(TvFlag) == 4, "TvFlag is an invalid size");
+
+/// This is nn::settings::system::TvResolution
+enum class TvResolution : u32 {
+    Auto,
+    Resolution1080p,
+    Resolution720p,
+    Resolution480p,
+};
+
+/// This is nn::settings::system::HdmiContentType
+enum class HdmiContentType : u32 {
+    None,
+    Graphics,
+    Cinema,
+    Photo,
+    Game,
+};
+
+/// This is nn::settings::system::RgbRange
+enum class RgbRange : u32 {
+    Auto,
+    Full,
+    Limited,
+};
+
+/// This is nn::settings::system::CmuMode
+enum class CmuMode : u32 {
+    None,
+    ColorInvert,
+    HighContrast,
+    GrayScale,
+};
+
+/// This is nn::settings::system::TvSettings
+struct TvSettings {
+    TvFlag flags;
+    TvResolution tv_resolution;
+    HdmiContentType hdmi_content_type;
+    RgbRange rgb_range;
+    CmuMode cmu_mode;
+    u32 tv_underscan;
+    f32 tv_gama;
+    f32 constrast_ratio;
+};
+static_assert(sizeof(TvSettings) == 0x20, "TvSettings is an invalid size");
+
+/// This is nn::settings::system::PrimaryAlbumStorage
+enum class PrimaryAlbumStorage : u32 {
+    Nand,
+    SdCard,
+};
+
+/// This is nn::settings::system::HandheldSleepPlan
+enum class HandheldSleepPlan : u32 {
+    Sleep1Min,
+    Sleep3Min,
+    Sleep5Min,
+    Sleep10Min,
+    Sleep30Min,
+    Never,
+};
+
+/// This is nn::settings::system::ConsoleSleepPlan
+enum class ConsoleSleepPlan : u32 {
+    Sleep1Hour,
+    Sleep2Hour,
+    Sleep3Hour,
+    Sleep6Hour,
+    Sleep12Hour,
+    Never,
+};
+
+/// This is nn::settings::system::SleepFlag
+struct SleepFlag {
+    union {
+        u32 raw{};
+
+        BitField<0, 1, u32> SleepsWhilePlayingMedia;
+        BitField<1, 1, u32> WakesAtPowerStateChange;
+    };
+};
+static_assert(sizeof(SleepFlag) == 4, "TvFlag is an invalid size");
+
+/// This is nn::settings::system::SleepSettings
+struct SleepSettings {
+    SleepFlag flags;
+    HandheldSleepPlan handheld_sleep_plan;
+    ConsoleSleepPlan console_sleep_plan;
+};
+static_assert(sizeof(SleepSettings) == 0xc, "SleepSettings is incorrect size");
+
+/// This is nn::settings::system::EulaVersionClockType
+enum class EulaVersionClockType : u32 {
+    NetworkSystemClock,
+    SteadyClock,
+};
+
+/// This is nn::settings::system::EulaVersion
+struct EulaVersion {
+    u32 version;
+    RegionCode region_code;
+    EulaVersionClockType clock_type;
+    INSERT_PADDING_BYTES(0x4);
+    s64 posix_time;
+    Time::Clock::SteadyClockTimePoint timestamp;
+};
+static_assert(sizeof(EulaVersion) == 0x30, "EulaVersion is incorrect size");
+
+struct SystemSettings {
+    // 0/unwritten (1.0.0), 0x20000 (2.0.0), 0x30000 (3.0.0-3.0.1), 0x40001 (4.0.0-4.1.0), 0x50000
+    // (5.0.0-5.1.0), 0x60000 (6.0.0-6.2.0), 0x70000 (7.0.0), 0x80000 (8.0.0-8.1.1), 0x90000
+    // (9.0.0-10.0.4), 0x100100 (10.1.0+), 0x120000 (12.0.0-12.1.0), 0x130000 (13.0.0-13.2.1),
+    // 0x140000 (14.0.0+)
+    u32 version;
+    // 0/unwritten (1.0.0), 1 (6.0.0-8.1.0), 2 (8.1.1), 7 (9.0.0+).
+    // if (flags & 2), defaults are written for AnalogStickUserCalibration
+    u32 flags;
+
+    std::array<u8, 0x8> reserved_00008;
+
+    // nn::settings::LanguageCode
+    LanguageCode language_code;
+
+    std::array<u8, 0x38> reserved_00018;
+
+    // nn::settings::system::NetworkSettings
+    u32 network_setting_count;
+    bool wireless_lan_enable_flag;
+    std::array<u8, 0x3> pad_00055;
+
+    std::array<u8, 0x8> reserved_00058;
+
+    // nn::settings::system::NetworkSettings
+    std::array<std::array<u8, 0x400>, 32> network_settings_1B0;
+
+    // nn::settings::system::BluetoothDevicesSettings
+    std::array<u8, 0x4> bluetooth_device_settings_count;
+    bool bluetooth_enable_flag;
+    std::array<u8, 0x3> pad_08065;
+    bool bluetooth_afh_enable_flag;
+    std::array<u8, 0x3> pad_08069;
+    bool bluetooth_boost_enable_flag;
+    std::array<u8, 0x3> pad_0806D;
+    std::array<std::array<u8, 0x200>, 10> bluetooth_device_settings_first_10;
+
+    s32 ldn_channel;
+
+    std::array<u8, 0x3C> reserved_09474;
+
+    // nn::util::Uuid MiiAuthorId
+    std::array<u8, 0x10> mii_author_id;
+
+    std::array<u8, 0x30> reserved_094C0;
+
+    // nn::settings::system::NxControllerSettings
+    u32 nx_controller_settings_count;
+
+    std::array<u8, 0xC> reserved_094F4;
+
+    // nn::settings::system::NxControllerSettings,
+    // nn::settings::system::NxControllerLegacySettings on 13.0.0+
+    std::array<std::array<u8, 0x40>, 10> nx_controller_legacy_settings;
+
+    std::array<u8, 0x170> reserved_09780;
+
+    bool external_rtc_reset_flag;
+    std::array<u8, 0x3> pad_098F1;
+
+    std::array<u8, 0x3C> reserved_098F4;
+
+    s32 push_notification_activity_mode_on_sleep;
+
+    std::array<u8, 0x3C> reserved_09934;
+
+    // nn::settings::system::ErrorReportSharePermission
+    ErrorReportSharePermission error_report_share_permssion;
+
+    std::array<u8, 0x3C> reserved_09974;
+
+    // nn::settings::KeyboardLayout
+    std::array<u8, 0x4> keyboard_layout;
+
+    std::array<u8, 0x3C> reserved_099B4;
+
+    bool web_inspector_flag;
+    std::array<u8, 0x3> pad_099F1;
+
+    // nn::settings::system::AllowedSslHost
+    u32 allowed_ssl_host_count;
+
+    bool memory_usage_rate_flag;
+    std::array<u8, 0x3> pad_099F9;
+
+    std::array<u8, 0x34> reserved_099FC;
+
+    // nn::settings::system::HostFsMountPoint
+    std::array<u8, 0x100> host_fs_mount_point;
+
+    // nn::settings::system::AllowedSslHost
+    std::array<std::array<u8, 0x100>, 8> allowed_ssl_hosts;
+
+    std::array<u8, 0x6C0> reserved_0A330;
+
+    // nn::settings::system::BlePairingSettings
+    u32 ble_pairing_settings_count;
+    std::array<u8, 0xC> reserved_0A9F4;
+    std::array<std::array<u8, 0x80>, 10> ble_pairing_settings;
+
+    // nn::settings::system::AccountOnlineStorageSettings
+    u32 account_online_storage_settings_count;
+    std::array<u8, 0xC> reserved_0AF04;
+    std::array<std::array<u8, 0x40>, 8> account_online_storage_settings;
+
+    bool pctl_ready_flag;
+    std::array<u8, 0x3> pad_0B111;
+
+    std::array<u8, 0x3C> reserved_0B114;
+
+    // nn::settings::system::ThemeId
+    std::array<u8, 0x80> theme_id_type0;
+    std::array<u8, 0x80> theme_id_type1;
+
+    std::array<u8, 0x100> reserved_0B250;
+
+    // nn::settings::ChineseTraditionalInputMethod
+    ChineseTraditionalInputMethod chinese_traditional_input_method;
+
+    std::array<u8, 0x3C> reserved_0B354;
+
+    bool zoom_flag;
+    std::array<u8, 0x3> pad_0B391;
+
+    std::array<u8, 0x3C> reserved_0B394;
+
+    // nn::settings::system::ButtonConfigRegisteredSettings
+    u32 button_config_registered_settings_count;
+    std::array<u8, 0xC> reserved_0B3D4;
+
+    // nn::settings::system::ButtonConfigSettings
+    u32 button_config_settings_count;
+    std::array<u8, 0x4> reserved_0B3E4;
+    std::array<std::array<u8, 0x5A8>, 5> button_config_settings;
+    std::array<u8, 0x13B0> reserved_0D030;
+    u32 button_config_settings_embedded_count;
+    std::array<u8, 0x4> reserved_0E3E4;
+    std::array<std::array<u8, 0x5A8>, 5> button_config_settings_embedded;
+    std::array<u8, 0x13B0> reserved_10030;
+    u32 button_config_settings_left_count;
+    std::array<u8, 0x4> reserved_113E4;
+    std::array<std::array<u8, 0x5A8>, 5> button_config_settings_left;
+    std::array<u8, 0x13B0> reserved_13030;
+    u32 button_config_settings_right_count;
+    std::array<u8, 0x4> reserved_143E4;
+    std::array<std::array<u8, 0x5A8>, 5> button_config_settings_right;
+    std::array<u8, 0x73B0> reserved_16030;
+    // nn::settings::system::ButtonConfigRegisteredSettings
+    std::array<u8, 0x5C8> button_config_registered_settings_embedded;
+    std::array<std::array<u8, 0x5C8>, 10> button_config_registered_settings;
+
+    std::array<u8, 0x7FF8> reserved_21378;
+
+    // nn::settings::system::ConsoleSixAxisSensorAccelerationBias
+    std::array<u8, 0xC> console_six_axis_sensor_acceleration_bias;
+    // nn::settings::system::ConsoleSixAxisSensorAngularVelocityBias
+    std::array<u8, 0xC> console_six_axis_sensor_angular_velocity_bias;
+    // nn::settings::system::ConsoleSixAxisSensorAccelerationGain
+    std::array<u8, 0x24> console_six_axis_sensor_acceleration_gain;
+    // nn::settings::system::ConsoleSixAxisSensorAngularVelocityGain
+    std::array<u8, 0x24> console_six_axis_sensor_angular_velocity_gain;
+    // nn::settings::system::ConsoleSixAxisSensorAngularVelocityTimeBias
+    std::array<u8, 0xC> console_six_axis_sensor_angular_velocity_time_bias;
+    // nn::settings::system::ConsoleSixAxisSensorAngularAcceleration
+    std::array<u8, 0x24> console_six_axis_sensor_angular_velocity_acceleration;
+
+    std::array<u8, 0x70> reserved_29400;
+
+    bool lock_screen_flag;
+    std::array<u8, 0x3> pad_29471;
+
+    std::array<u8, 0x4> reserved_249274;
+
+    ColorSet color_set_id;
+
+    QuestFlag quest_flag;
+
+    // nn::settings::system::RegionCode
+    RegionCode region_code;
+
+    // Different to nn::settings::system::InitialLaunchSettings?
+    InitialLaunchSettingsPacked initial_launch_settings_packed;
+
+    bool battery_percentage_flag;
+    std::array<u8, 0x3> pad_294A1;
+
+    // BitFlagSet<32, nn::settings::system::AppletLaunchFlag>
+    u32 applet_launch_flag;
+
+    // nn::settings::system::ThemeSettings
+    std::array<u8, 0x8> theme_settings;
+    // nn::fssystem::ArchiveMacKey
+    std::array<u8, 0x10> theme_key;
+
+    bool field_testing_flag;
+    std::array<u8, 0x3> pad_294C1;
+
+    s32 panel_crc_mode;
+
+    std::array<u8, 0x28> reserved_294C8;
+
+    // nn::settings::system::BacklightSettings
+    std::array<u8, 0x2C> backlight_settings_mixed_up;
+
+    std::array<u8, 0x64> reserved_2951C;
+
+    // nn::time::SystemClockContext
+    Service::Time::Clock::SystemClockContext user_system_clock_context;
+    Service::Time::Clock::SystemClockContext network_system_clock_context;
+    bool user_system_clock_automatic_correction_enabled;
+    std::array<u8, 0x3> pad_295C1;
+    std::array<u8, 0x4> reserved_295C4;
+    // nn::time::SteadyClockTimePoint
+    Service::Time::Clock::SteadyClockTimePoint
+        user_system_clock_automatic_correction_updated_time_point;
+
+    std::array<u8, 0x10> reserved_295E0;
+
+    // nn::settings::system::AccountSettings
+    AccountSettings account_settings;
+
+    std::array<u8, 0xFC> reserved_295F4;
+
+    // nn::settings::system::AudioVolume
+    std::array<u8, 0x8> audio_volume_type0;
+    std::array<u8, 0x8> audio_volume_type1;
+    // nn::settings::system::AudioOutputMode
+    s32 audio_output_mode_type0;
+    s32 audio_output_mode_type1;
+    s32 audio_output_mode_type2;
+    bool force_mute_on_headphone_removed;
+    std::array<u8, 0x3> pad_2970D;
+    s32 headphone_volume_warning_count;
+    bool heaphone_volume_update_flag;
+    std::array<u8, 0x3> pad_29715;
+    // nn::settings::system::AudioVolume
+    std::array<u8, 0x8> audio_volume_type2;
+    // nn::settings::system::AudioOutputMode
+    s32 audio_output_mode_type3;
+    s32 audio_output_mode_type4;
+    bool hearing_protection_safeguard_flag;
+    std::array<u8, 0x3> pad_29729;
+    std::array<u8, 0x4> reserved_2972C;
+    s64 hearing_protection_safeguard_remaining_time;
+    std::array<u8, 0x38> reserved_29738;
+
+    bool console_information_upload_flag;
+    std::array<u8, 0x3> pad_29771;
+
+    std::array<u8, 0x3C> reserved_29774;
+
+    bool automatic_application_download_flag;
+    std::array<u8, 0x3> pad_297B1;
+
+    std::array<u8, 0x4> reserved_297B4;
+
+    // nn::settings::system::NotificationSettings
+    NotificationSettings notification_settings;
+
+    std::array<u8, 0x60> reserved_297D0;
+
+    // nn::settings::system::AccountNotificationSettings
+    u32 account_notification_settings_count;
+    std::array<u8, 0xC> reserved_29834;
+    std::array<AccountNotificationSettings, 8> account_notification_settings;
+
+    std::array<u8, 0x140> reserved_29900;
+
+    f32 vibration_master_volume;
+
+    bool usb_full_key_enable_flag;
+    std::array<u8, 0x3> pad_29A45;
+
+    // nn::settings::system::AnalogStickUserCalibration
+    std::array<u8, 0x10> analog_stick_user_calibration_left;
+    std::array<u8, 0x10> analog_stick_user_calibration_right;
+
+    // nn::settings::system::TouchScreenMode
+    s32 touch_screen_mode;
+
+    std::array<u8, 0x14> reserved_29A6C;
+
+    // nn::settings::system::TvSettings
+    TvSettings tv_settings;
+
+    // nn::settings::system::Edid
+    std::array<u8, 0x100> edid;
+
+    std::array<u8, 0x2E0> reserved_29BA0;
+
+    // nn::settings::system::DataDeletionSettings
+    std::array<u8, 0x8> data_deletion_settings;
+
+    std::array<u8, 0x38> reserved_29E88;
+
+    // nn::ncm::ProgramId
+    std::array<u8, 0x8> initial_system_applet_program_id;
+    std::array<u8, 0x8> overlay_disp_program_id;
+
+    std::array<u8, 0x4> reserved_29ED0;
+
+    bool requires_run_repair_time_reviser;
+
+    std::array<u8, 0x6B> reserved_29ED5;
+
+    // nn::time::LocationName
+    Service::Time::TimeZone::LocationName device_time_zone_location_name;
+    std::array<u8, 0x4> reserved_29F64;
+    // nn::time::SteadyClockTimePoint
+    Service::Time::Clock::SteadyClockTimePoint device_time_zone_location_updated_time;
+
+    std::array<u8, 0xC0> reserved_29F80;
+
+    // nn::settings::system::PrimaryAlbumStorage
+    PrimaryAlbumStorage primary_album_storage;
+
+    std::array<u8, 0x3C> reserved_2A044;
+
+    bool usb_30_enable_flag;
+    std::array<u8, 0x3> pad_2A081;
+    bool usb_30_host_enable_flag;
+    std::array<u8, 0x3> pad_2A085;
+    bool usb_30_device_enable_flag;
+    std::array<u8, 0x3> pad_2A089;
+
+    std::array<u8, 0x34> reserved_2A08C;
+
+    bool nfc_enable_flag;
+    std::array<u8, 0x3> pad_2A0C1;
+
+    std::array<u8, 0x3C> reserved_2A0C4;
+
+    // nn::settings::system::SleepSettings
+    SleepSettings sleep_settings;
+
+    std::array<u8, 0x34> reserved_2A10C;
+
+    // nn::settings::system::EulaVersion
+    u32 eula_version_count;
+    std::array<u8, 0xC> reserved_2A144;
+    std::array<EulaVersion, 32> eula_versions;
+
+    std::array<u8, 0x200> reserved_2A750;
+
+    // nn::settings::system::DeviceNickName
+    std::array<u8, 0x80> device_nick_name;
+
+    std::array<u8, 0x80> reserved_2A9D0;
+
+    bool auto_update_enable_flag;
+    std::array<u8, 0x3> pad_2AA51;
+
+    std::array<u8, 0x4C> reserved_2AA54;
+
+    // nn::settings::system::BluetoothDevicesSettings
+    std::array<std::array<u8, 0x200>, 14> bluetooth_device_settings_last_14;
+
+    std::array<u8, 0x2000> reserved_2C6A0;
+
+    // nn::settings::system::NxControllerSettings
+    std::array<std::array<u8, 0x800>, 10> nx_controller_settings_data_from_offset_30;
+};
+
+static_assert(offsetof(SystemSettings, language_code) == 0x10);
+static_assert(offsetof(SystemSettings, network_setting_count) == 0x50);
+static_assert(offsetof(SystemSettings, network_settings_1B0) == 0x60);
+static_assert(offsetof(SystemSettings, bluetooth_device_settings_count) == 0x8060);
+static_assert(offsetof(SystemSettings, bluetooth_enable_flag) == 0x8064);
+static_assert(offsetof(SystemSettings, bluetooth_device_settings_first_10) == 0x8070);
+static_assert(offsetof(SystemSettings, ldn_channel) == 0x9470);
+static_assert(offsetof(SystemSettings, mii_author_id) == 0x94B0);
+static_assert(offsetof(SystemSettings, nx_controller_settings_count) == 0x94F0);
+static_assert(offsetof(SystemSettings, nx_controller_legacy_settings) == 0x9500);
+static_assert(offsetof(SystemSettings, external_rtc_reset_flag) == 0x98F0);
+static_assert(offsetof(SystemSettings, push_notification_activity_mode_on_sleep) == 0x9930);
+static_assert(offsetof(SystemSettings, allowed_ssl_host_count) == 0x99F4);
+static_assert(offsetof(SystemSettings, host_fs_mount_point) == 0x9A30);
+static_assert(offsetof(SystemSettings, allowed_ssl_hosts) == 0x9B30);
+static_assert(offsetof(SystemSettings, ble_pairing_settings_count) == 0xA9F0);
+static_assert(offsetof(SystemSettings, ble_pairing_settings) == 0xAA00);
+static_assert(offsetof(SystemSettings, account_online_storage_settings_count) == 0xAF00);
+static_assert(offsetof(SystemSettings, account_online_storage_settings) == 0xAF10);
+static_assert(offsetof(SystemSettings, pctl_ready_flag) == 0xB110);
+static_assert(offsetof(SystemSettings, theme_id_type0) == 0xB150);
+static_assert(offsetof(SystemSettings, chinese_traditional_input_method) == 0xB350);
+static_assert(offsetof(SystemSettings, button_config_registered_settings_count) == 0xB3D0);
+static_assert(offsetof(SystemSettings, button_config_settings_count) == 0xB3E0);
+static_assert(offsetof(SystemSettings, button_config_settings) == 0xB3E8);
+static_assert(offsetof(SystemSettings, button_config_registered_settings_embedded) == 0x1D3E0);
+static_assert(offsetof(SystemSettings, console_six_axis_sensor_acceleration_bias) == 0x29370);
+static_assert(offsetof(SystemSettings, lock_screen_flag) == 0x29470);
+static_assert(offsetof(SystemSettings, battery_percentage_flag) == 0x294A0);
+static_assert(offsetof(SystemSettings, field_testing_flag) == 0x294C0);
+static_assert(offsetof(SystemSettings, backlight_settings_mixed_up) == 0x294F0);
+static_assert(offsetof(SystemSettings, user_system_clock_context) == 0x29580);
+static_assert(offsetof(SystemSettings, network_system_clock_context) == 0x295A0);
+static_assert(offsetof(SystemSettings, user_system_clock_automatic_correction_enabled) == 0x295C0);
+static_assert(offsetof(SystemSettings, user_system_clock_automatic_correction_updated_time_point) ==
+              0x295C8);
+static_assert(offsetof(SystemSettings, account_settings) == 0x295F0);
+static_assert(offsetof(SystemSettings, audio_volume_type0) == 0x296F0);
+static_assert(offsetof(SystemSettings, hearing_protection_safeguard_remaining_time) == 0x29730);
+static_assert(offsetof(SystemSettings, automatic_application_download_flag) == 0x297B0);
+static_assert(offsetof(SystemSettings, notification_settings) == 0x297B8);
+static_assert(offsetof(SystemSettings, account_notification_settings) == 0x29840);
+static_assert(offsetof(SystemSettings, vibration_master_volume) == 0x29A40);
+static_assert(offsetof(SystemSettings, analog_stick_user_calibration_left) == 0x29A48);
+static_assert(offsetof(SystemSettings, touch_screen_mode) == 0x29A68);
+static_assert(offsetof(SystemSettings, edid) == 0x29AA0);
+static_assert(offsetof(SystemSettings, data_deletion_settings) == 0x29E80);
+static_assert(offsetof(SystemSettings, requires_run_repair_time_reviser) == 0x29ED4);
+static_assert(offsetof(SystemSettings, device_time_zone_location_name) == 0x29F40);
+static_assert(offsetof(SystemSettings, nfc_enable_flag) == 0x2A0C0);
+static_assert(offsetof(SystemSettings, eula_version_count) == 0x2A140);
+static_assert(offsetof(SystemSettings, device_nick_name) == 0x2A950);
+static_assert(offsetof(SystemSettings, bluetooth_device_settings_last_14) == 0x2AAA0);
+static_assert(offsetof(SystemSettings, nx_controller_settings_data_from_offset_30) == 0x2E6A0);
+
+static_assert(sizeof(SystemSettings) == 0x336A0, "SystemSettings has the wrong size!");
+
+SystemSettings DefaultSystemSettings();
+
+} // namespace Service::Set