diff --git a/src/Cafe/CMakeLists.txt b/src/Cafe/CMakeLists.txt
index 59b6aa42..b7656789 100644
--- a/src/Cafe/CMakeLists.txt
+++ b/src/Cafe/CMakeLists.txt
@@ -422,6 +422,8 @@ add_library(CemuCafe
   OS/libs/nn_olv/nn_olv_UploadFavoriteTypes.h
   OS/libs/nn_olv/nn_olv_PostTypes.cpp
   OS/libs/nn_olv/nn_olv_PostTypes.h
+  OS/libs/nn_olv/nn_olv_OfflineDB.cpp
+  OS/libs/nn_olv/nn_olv_OfflineDB.h
   OS/libs/nn_pdm/nn_pdm.cpp
   OS/libs/nn_pdm/nn_pdm.h
   OS/libs/nn_save/nn_save.cpp
diff --git a/src/Cafe/OS/libs/coreinit/coreinit_MCP.cpp b/src/Cafe/OS/libs/coreinit/coreinit_MCP.cpp
index a784e593..b348218f 100644
--- a/src/Cafe/OS/libs/coreinit/coreinit_MCP.cpp
+++ b/src/Cafe/OS/libs/coreinit/coreinit_MCP.cpp
@@ -546,6 +546,7 @@ void coreinitExport_UCReadSysConfig(PPCInterpreter_t* hCPU)
 		{
 			// get parental online control for online features
 			// note: This option is account-bound, the p_acct1 prefix indicates that the account in slot 1 is used
+			// a non-zero value means network access is restricted through parental access. 0 means allowed
 			// account in slot 1
 			if (ucParam->resultPtr != _swapEndianU32(MPTR_NULL))
 				memory_writeU8(_swapEndianU32(ucParam->resultPtr), 0); // data type is guessed
@@ -561,7 +562,7 @@ void coreinitExport_UCReadSysConfig(PPCInterpreter_t* hCPU)
 		{
 			// miiverse restrictions
 			if (ucParam->resultPtr != _swapEndianU32(MPTR_NULL))
-				memory_writeU8(_swapEndianU32(ucParam->resultPtr), 0); // data type is guessed (0 -> no restrictions, 1 -> read only?, 2 -> no access?)
+				memory_writeU8(_swapEndianU32(ucParam->resultPtr), 0); // data type is guessed (0 -> no restrictions, 1 -> read only, 2 -> no access)
 		}
 		else if (_strcmpi(ucParam->settingName, "s_acct01.uuid") == 0)
 		{
diff --git a/src/Cafe/OS/libs/nn_olv/nn_olv.cpp b/src/Cafe/OS/libs/nn_olv/nn_olv.cpp
index 50036249..25245b5c 100644
--- a/src/Cafe/OS/libs/nn_olv/nn_olv.cpp
+++ b/src/Cafe/OS/libs/nn_olv/nn_olv.cpp
@@ -5,6 +5,7 @@
 #include "nn_olv_DownloadCommunityTypes.h"
 #include "nn_olv_UploadFavoriteTypes.h"
 #include "nn_olv_PostTypes.h"
+#include "nn_olv_OfflineDB.h"
 
 #include "Cafe/OS/libs/proc_ui/proc_ui.h"
 #include "Cafe/OS/libs/coreinit/coreinit_Time.h"
@@ -13,179 +14,6 @@ namespace nn
 {
 	namespace olv
 	{
-		struct DownloadedPostData_t
-		{
-			/* +0x0000 */ uint32be flags;
-			/* +0x0004 */ uint32be userPrincipalId;
-			/* +0x0008 */ char postId[0x20]; // size guessed
-			/* +0x0028 */ uint64 postDate;
-			/* +0x0030 */ uint8 feeling;
-			/* +0x0031 */ uint8 padding0031[3];
-			/* +0x0034 */ uint32be regionId;
-			/* +0x0038 */ uint8 platformId;
-			/* +0x0039 */ uint8 languageId;
-			/* +0x003A */ uint8 countryId;
-			/* +0x003B */ uint8 padding003B[1];
-			/* +0x003C */ uint16be bodyText[0x100]; // actual size is unknown
-			/* +0x023C */ uint32be bodyTextLength; 
-			/* +0x0240 */ uint8 compressedMemoBody[0xA000]; // 40KB
-			/* +0xA240 */ uint32be compressedMemoBodyRelated; // size of compressed data?
-			/* +0xA244 */ uint16be topicTag[0x98];
-			// app data
-			/* +0xA374 */ uint8 appData[0x400];
-			/* +0xA774 */ uint32be appDataLength;
-			// external binary
-			/* +0xA778 */ uint8 externalBinaryUrl[0x100];
-			/* +0xA878 */ uint32be externalBinaryDataSize;
-			// external image
-			/* +0xA87C */ uint8 externalImageDataUrl[0x100];
-			/* +0xA97C */ uint32be externalImageDataSize;
-			// external url ?
-			/* +0xA980 */ char externalUrl[0x100];
-			// mii
-			/* +0xAA80 */ uint8 miiData[0x60];
-			/* +0xAAE0 */ uint16be miiNickname[0x20];
-			/* +0xAB20 */ uint8 unusedAB20[0x14E0];
-
-			// everything above is part of DownloadedDataBase
-			// everything below is part of DownloadedPostData
-			/* +0xC000 */ uint8 uknDataC000[8]; // ??
-			/* +0xC008 */ uint32be communityId;
-			/* +0xC00C */ uint32be empathyCount;
-			/* +0xC010 */ uint32be commentCount;
-			/* +0xC014 */ uint8 unused[0x1F4];
-		}; // size: 0xC208
-
-		static_assert(sizeof(DownloadedPostData_t) == 0xC208, "");
-		static_assert(offsetof(DownloadedPostData_t, postDate) == 0x0028, "");
-		static_assert(offsetof(DownloadedPostData_t, platformId) == 0x0038, "");
-		static_assert(offsetof(DownloadedPostData_t, bodyText) == 0x003C, "");
-		static_assert(offsetof(DownloadedPostData_t, compressedMemoBody) == 0x0240, "");
-		static_assert(offsetof(DownloadedPostData_t, topicTag) == 0xA244, "");
-		static_assert(offsetof(DownloadedPostData_t, appData) == 0xA374, "");
-		static_assert(offsetof(DownloadedPostData_t, externalBinaryUrl) == 0xA778, "");
-		static_assert(offsetof(DownloadedPostData_t, externalImageDataUrl) == 0xA87C, "");
-		static_assert(offsetof(DownloadedPostData_t, externalUrl) == 0xA980, "");
-		static_assert(offsetof(DownloadedPostData_t, miiData) == 0xAA80, "");
-		static_assert(offsetof(DownloadedPostData_t, miiNickname) == 0xAAE0, "");
-		static_assert(offsetof(DownloadedPostData_t, unusedAB20) == 0xAB20, "");
-		static_assert(offsetof(DownloadedPostData_t, communityId) == 0xC008, "");
-		static_assert(offsetof(DownloadedPostData_t, empathyCount) == 0xC00C, "");
-		static_assert(offsetof(DownloadedPostData_t, commentCount) == 0xC010, "");
-
-		const int POST_DATA_FLAG_HAS_BODY_TEXT = (0x0001);
-		const int POST_DATA_FLAG_HAS_BODY_MEMO = (0x0002);
-
-
-		void export_DownloadPostDataList(PPCInterpreter_t* hCPU)
-		{
-			ppcDefineParamTypePtr(downloadedTopicData, void, 0); // DownloadedTopicData
-			ppcDefineParamTypePtr(downloadedPostData, DownloadedPostData_t, 1); // DownloadedPostData
-			ppcDefineParamTypePtr(downloadedPostDataSize, uint32be, 2);
-			ppcDefineParamS32(maxCount, 3);
-			ppcDefineParamTypePtr(listParam, void, 4); // DownloadPostDataListParam
-
-			maxCount = 0; // DISABLED
-
-			// just some test
-			for (sint32 i = 0; i < maxCount; i++)
-			{
-				DownloadedPostData_t* postData = downloadedPostData + i;
-				memset(postData, 0, sizeof(DownloadedPostData_t));
-				postData->userPrincipalId = 0x1000 + i;
-				// post id
-				sprintf(postData->postId, "postid-%04x", i+(GetTickCount()%10000));
-				postData->bodyTextLength = 12;
-				postData->bodyText[0] = 'H';
-				postData->bodyText[1] = 'e';
-				postData->bodyText[2] = 'l';
-				postData->bodyText[3] = 'l';
-				postData->bodyText[4] = 'o';
-				postData->bodyText[5] = ' ';
-				postData->bodyText[6] = 'w';
-				postData->bodyText[7] = 'o';
-				postData->bodyText[8] = 'r';
-				postData->bodyText[9] = 'l';
-				postData->bodyText[10] = 'd';
-				postData->bodyText[11] = '!';
-
-				postData->miiNickname[0] = 'C';
-				postData->miiNickname[1] = 'e';
-				postData->miiNickname[2] = 'm';
-				postData->miiNickname[3] = 'u';
-				postData->miiNickname[4] = '-';
-				postData->miiNickname[5] = 'M';
-				postData->miiNickname[6] = 'i';
-				postData->miiNickname[7] = 'i';
-
-				postData->topicTag[0] = 't';
-				postData->topicTag[1] = 'o';
-				postData->topicTag[2] = 'p';
-				postData->topicTag[3] = 'i';
-				postData->topicTag[4] = 'c';
-
-				postData->flags = POST_DATA_FLAG_HAS_BODY_TEXT;
-			}
-			*downloadedPostDataSize = maxCount;
-
-			osLib_returnFromFunction(hCPU, 0);
-		}
-
-		void exportDownloadPostData_TestFlags(PPCInterpreter_t* hCPU)
-		{
-			ppcDefineParamTypePtr(downloadedPostData, DownloadedPostData_t, 0);
-			ppcDefineParamU32(testFlags, 1);
-
-			if (((uint32)downloadedPostData->flags) & testFlags)
-				osLib_returnFromFunction(hCPU, 1);
-			else
-				osLib_returnFromFunction(hCPU, 0);
-		}
-
-		void exportDownloadPostData_GetPostId(PPCInterpreter_t* hCPU)
-		{
-			ppcDefineParamTypePtr(downloadedPostData, DownloadedPostData_t, 0);
-			osLib_returnFromFunction(hCPU, memory_getVirtualOffsetFromPointer(downloadedPostData->postId));
-		}
-
-		void exportDownloadPostData_GetMiiNickname(PPCInterpreter_t* hCPU)
-		{
-			ppcDefineParamTypePtr(downloadedPostData, DownloadedPostData_t, 0);
-			if(downloadedPostData->miiNickname[0] == 0 )
-				osLib_returnFromFunction(hCPU, MPTR_NULL);
-			else
-				osLib_returnFromFunction(hCPU, memory_getVirtualOffsetFromPointer(downloadedPostData->miiNickname));
-		}
-
-		void exportDownloadPostData_GetTopicTag(PPCInterpreter_t* hCPU)
-		{
-			ppcDefineParamTypePtr(downloadedPostData, DownloadedPostData_t, 0);
-			osLib_returnFromFunction(hCPU, memory_getVirtualOffsetFromPointer(downloadedPostData->topicTag));
-		}
-
-		void exportDownloadPostData_GetBodyText(PPCInterpreter_t* hCPU)
-		{
-			ppcDefineParamTypePtr(downloadedPostData, DownloadedPostData_t, 0);
-			ppcDefineParamWStrBE(strOut, 1);
-			ppcDefineParamS32(maxLength, 2);
-
-			if (((uint32)downloadedPostData->flags&POST_DATA_FLAG_HAS_BODY_TEXT) == 0)
-			{
-				osLib_returnFromFunction(hCPU, 0xC1106800);
-				return;
-			}
-
-			memset(strOut, 0, sizeof(uint16be)*maxLength);
-			sint32 copyLen = std::min(maxLength - 1, (sint32)downloadedPostData->bodyTextLength);
-			for (sint32 i = 0; i < copyLen; i++)
-			{
-				strOut[i] = downloadedPostData->bodyText[i];
-			}
-			strOut[copyLen] = '\0';
-
-			osLib_returnFromFunction(hCPU, 0);
-		}
-
 		struct PortalAppParam_t
 		{
 			/* +0x1A663B */ char serviceToken[32]; // size is unknown
@@ -284,6 +112,10 @@ namespace nn
 
 		void load()
 		{
+			g_ReportTypes = 0;
+			g_IsOnlineMode = false;
+			g_IsInitialized = false;
+			g_IsOfflineDBMode = false;
 
 			loadOliveInitializeTypes();
 			loadOliveUploadCommunityTypes();
@@ -293,13 +125,6 @@ namespace nn
 
 			cafeExportRegisterFunc(GetErrorCode, "nn_olv", "GetErrorCode__Q2_2nn3olvFRCQ2_2nn6Result", LogType::None);
 
-			osLib_addFunction("nn_olv", "DownloadPostDataList__Q2_2nn3olvFPQ3_2nn3olv19DownloadedTopicDataPQ3_2nn3olv18DownloadedPostDataPUiUiPCQ3_2nn3olv25DownloadPostDataListParam", export_DownloadPostDataList);
-//			osLib_addFunction("nn_olv", "TestFlags__Q3_2nn3olv18DownloadedDataBaseCFUi", exportDownloadPostData_TestFlags);
-//			osLib_addFunction("nn_olv", "GetPostId__Q3_2nn3olv18DownloadedDataBaseCFv", exportDownloadPostData_GetPostId);
-//			osLib_addFunction("nn_olv", "GetMiiNickname__Q3_2nn3olv18DownloadedDataBaseCFv", exportDownloadPostData_GetMiiNickname);
-//			osLib_addFunction("nn_olv", "GetTopicTag__Q3_2nn3olv18DownloadedDataBaseCFv", exportDownloadPostData_GetTopicTag);
-//			osLib_addFunction("nn_olv", "GetBodyText__Q3_2nn3olv18DownloadedDataBaseCFPwUi", exportDownloadPostData_GetBodyText);
-
 			osLib_addFunction("nn_olv", "GetServiceToken__Q4_2nn3olv6hidden14PortalAppParamCFv", exportPortalAppParam_GetServiceToken);
 
 			cafeExportRegisterFunc(StubPostApp, "nn_olv", "UploadPostDataByPostApp__Q2_2nn3olvFPCQ3_2nn3olv28UploadPostDataByPostAppParam", LogType::Force);
@@ -314,5 +139,10 @@ namespace nn
 			cafeExportRegisterFunc(UploadedPostData_GetPostId, "nn_olv", "GetPostId__Q3_2nn3olv16UploadedPostDataCFv", LogType::Force);
 		}
 
+		void unload() // not called yet
+		{
+			OfflineDB_Shutdown();
+		}
+
 	}
 }
\ No newline at end of file
diff --git a/src/Cafe/OS/libs/nn_olv/nn_olv.h b/src/Cafe/OS/libs/nn_olv/nn_olv.h
index c608e391..52474b49 100644
--- a/src/Cafe/OS/libs/nn_olv/nn_olv.h
+++ b/src/Cafe/OS/libs/nn_olv/nn_olv.h
@@ -19,5 +19,6 @@ namespace nn
 		sint32 GetOlvAccessKey(uint32_t* pOutKey);
 
 		void load();
+		void unload();
 	}
 }
\ No newline at end of file
diff --git a/src/Cafe/OS/libs/nn_olv/nn_olv_Common.h b/src/Cafe/OS/libs/nn_olv/nn_olv_Common.h
index 718c10c3..c598e7ba 100644
--- a/src/Cafe/OS/libs/nn_olv/nn_olv_Common.h
+++ b/src/Cafe/OS/libs/nn_olv/nn_olv_Common.h
@@ -69,6 +69,7 @@ namespace nn
 		extern uint32_t g_ReportTypes;
 		extern bool g_IsInitialized;
 		extern bool g_IsOnlineMode;
+		extern bool g_IsOfflineDBMode; // use offline cache for posts
 
 		static void InitializeOliveRequest(CurlRequestHelper& req)
 		{
@@ -175,5 +176,39 @@ namespace nn
 		bool FormatCommunityCode(char* pOutCode, uint32* outLen, uint32 communityId);
 
 		sint32 olv_curlformcode_to_error(CURLFORMcode code);
+
+		// convert and copy utf8 string into UC2 big-endian array
+		template<size_t TLength>
+		uint32 SetStringUC2(uint16be(&str)[TLength], std::string_view sv, bool unescape = false)
+		{
+			if(unescape)
+			{
+				// todo
+			}
+			std::wstring ws = boost::nowide::widen(sv);
+			size_t copyLen = std::min<size_t>(TLength-1, ws.size());
+			for(size_t i=0; i<copyLen; i++)
+				str[i] = ws[i];
+			str[copyLen] = '\0';
+			return copyLen;
+		}
+
+		// safely copy null-terminated UC2 big-endian string into UC2 big-endian array
+		template<size_t TLength>
+		uint32 SetStringUC2(uint16be(&str)[TLength], const uint16be* strIn)
+		{
+			size_t copyLen = TLength-1;
+			for(size_t i=0; i<copyLen; i++)
+			{
+				if(strIn[i] == 0)
+				{
+					str[i] = 0;
+					return i;
+				}
+				str[i] = strIn[i];
+			}
+			str[copyLen] = '\0';
+			return copyLen;
+		}
 	}
 }
diff --git a/src/Cafe/OS/libs/nn_olv/nn_olv_InitializeTypes.cpp b/src/Cafe/OS/libs/nn_olv/nn_olv_InitializeTypes.cpp
index 62a2654d..0ae581e0 100644
--- a/src/Cafe/OS/libs/nn_olv/nn_olv_InitializeTypes.cpp
+++ b/src/Cafe/OS/libs/nn_olv/nn_olv_InitializeTypes.cpp
@@ -9,10 +9,10 @@ namespace nn
 {
 	namespace olv
 	{
-
 		uint32_t g_ReportTypes = 0;
 		bool g_IsOnlineMode = false;
 		bool g_IsInitialized = false;
+		bool g_IsOfflineDBMode = false;
 		ParamPackStorage g_ParamPack;
 		DiscoveryResultStorage g_DiscoveryResults;
 
@@ -241,9 +241,15 @@ namespace nn
 
 			g_IsInitialized = true;
 
+			if(ActiveSettings::GetNetworkService() == NetworkService::Nintendo)
+			{
+				// since the official Miiverse was shut down, use local post archive instead
+				g_IsOnlineMode = true;
+				g_IsOfflineDBMode = true;
+				return OLV_RESULT_SUCCESS;
+			}
 			if ((pParam->m_Flags & InitializeParam::FLAG_OFFLINE_MODE) == 0)
 			{
-
 				g_IsOnlineMode = true;
 
 				independentServiceToken_t token;
diff --git a/src/Cafe/OS/libs/nn_olv/nn_olv_OfflineDB.cpp b/src/Cafe/OS/libs/nn_olv/nn_olv_OfflineDB.cpp
new file mode 100644
index 00000000..241630aa
--- /dev/null
+++ b/src/Cafe/OS/libs/nn_olv/nn_olv_OfflineDB.cpp
@@ -0,0 +1,215 @@
+#include "nn_olv_Common.h"
+#include "nn_olv_PostTypes.h"
+#include "nn_olv_OfflineDB.h"
+#include "Cemu/ncrypto/ncrypto.h" // for base64 encoder/decoder
+#include "util/helpers/helpers.h"
+#include "Config/ActiveSettings.h"
+#include "Cafe/CafeSystem.h"
+#include <pugixml.hpp>
+#include <zlib.h>
+#include <zarchive/zarchivereader.h>
+
+namespace nn
+{
+	namespace olv
+	{
+		std::mutex g_offlineDBMutex;
+		bool g_offlineDBInitialized = false;
+		ZArchiveReader* g_offlineDBArchive{nullptr};
+
+		void OfflineDB_LazyInit()
+		{
+			std::scoped_lock _l(g_offlineDBMutex);
+			if(g_offlineDBInitialized)
+				return;
+			// open archive
+			g_offlineDBArchive = ZArchiveReader::OpenFromFile(ActiveSettings::GetUserDataPath("resources/miiverse/OfflineDB.zar"));
+			if(!g_offlineDBArchive)
+				cemuLog_log(LogType::Force, "Failed to open resources/miiverse/OfflineDB.zar. Miiverse posts will not be available");
+			g_offlineDBInitialized = true;
+		}
+
+		void OfflineDB_Shutdown()
+		{
+			std::scoped_lock _l(g_offlineDBMutex);
+			if(!g_offlineDBInitialized)
+				return;
+			delete g_offlineDBArchive;
+			g_offlineDBInitialized = false;
+		}
+
+		bool CheckForOfflineDBFile(const char* filePath, uint32* fileSize)
+		{
+			if(!g_offlineDBArchive)
+				return false;
+			ZArchiveNodeHandle fileHandle = g_offlineDBArchive->LookUp(filePath);
+			if (!g_offlineDBArchive->IsFile(fileHandle))
+				return false;
+			if(fileSize)
+				*fileSize = g_offlineDBArchive->GetFileSize(fileHandle);
+			return true;
+		}
+
+		bool LoadOfflineDBFile(const char* filePath, std::vector<uint8>& fileData)
+		{
+			fileData.clear();
+			if(!g_offlineDBArchive)
+				return false;
+			ZArchiveNodeHandle fileHandle = g_offlineDBArchive->LookUp(filePath);
+			if (!g_offlineDBArchive->IsFile(fileHandle))
+				return false;
+			fileData.resize(g_offlineDBArchive->GetFileSize(fileHandle));
+			g_offlineDBArchive->ReadFromFile(fileHandle, 0, fileData.size(), fileData.data());
+			return true;
+		}
+
+		void TryLoadCompressedMemoImage(DownloadedPostData& downloadedPostData)
+		{
+			const unsigned char tgaHeader_320x120_32BPP[] = {0x0,0x0,0x2,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x40,0x1,0x78,0x0,0x20,0x8};
+			std::string memoImageFilename = fmt::format("memo/{}", (char*)downloadedPostData.downloadedDataBase.postId);
+			std::vector<uint8> bitmaskCompressedImg;
+			if (!LoadOfflineDBFile(memoImageFilename.c_str(), bitmaskCompressedImg))
+				return;
+			if (bitmaskCompressedImg.size() != (320*120)/8)
+				return;
+			std::vector<uint8> decompressedImage;
+			decompressedImage.resize(sizeof(tgaHeader_320x120_32BPP) + 320 * 120 * 4);
+			memcpy(decompressedImage.data(), tgaHeader_320x120_32BPP, sizeof(tgaHeader_320x120_32BPP));
+			uint8* pOut = decompressedImage.data() + sizeof(tgaHeader_320x120_32BPP);
+			for(int i=0; i<320*120; i++)
+			{
+				bool isWhite = (bitmaskCompressedImg[i/8] & (1 << (i%8))) != 0;
+				if(isWhite)
+				{
+					pOut[0] = pOut[1] = pOut[2] = pOut[3] = 0xFF;
+				}
+				else
+				{
+					pOut[0] = pOut[1] = pOut[2] = 0;
+					pOut[3] = 0xFF;
+				}
+				pOut += 4;
+			}
+			// store compressed image
+			uLongf compressedDestLen = 40960;
+			int r = compress((uint8*)downloadedPostData.downloadedDataBase.compressedMemoBody, &compressedDestLen, decompressedImage.data(), decompressedImage.size());
+			if( r != Z_OK)
+				return;
+			downloadedPostData.downloadedDataBase.compressedMemoBodySize = compressedDestLen;
+			downloadedPostData.downloadedDataBase.SetFlag(DownloadedDataBase::FLAGS::HAS_BODY_MEMO);
+		}
+
+		void CheckForExternalImage(DownloadedPostData& downloadedPostData)
+		{
+			std::string externalImageFilename = fmt::format("image/{}.jpg", (char*)downloadedPostData.downloadedDataBase.postId);
+			uint32 fileSize;
+			if (!CheckForOfflineDBFile(externalImageFilename.c_str(), &fileSize))
+				return;
+			strcpy((char*)downloadedPostData.downloadedDataBase.externalImageDataUrl, externalImageFilename.c_str());
+			downloadedPostData.downloadedDataBase.SetFlag(DownloadedDataBase::FLAGS::HAS_EXTERNAL_IMAGE);
+			downloadedPostData.downloadedDataBase.externalImageDataSize = fileSize;
+		}
+
+		nnResult _Async_OfflineDB_DownloadPostDataListParam_DownloadPostDataList(coreinit::OSEvent* event, DownloadedTopicData* downloadedTopicData, DownloadedPostData* downloadedPostData, uint32be* postCountOut, uint32 maxCount, DownloadPostDataListParam* param)
+		{
+			scope_exit _se([&](){coreinit::OSSignalEvent(event);});
+
+			uint64 titleId = CafeSystem::GetForegroundTitleId();
+
+			memset(downloadedTopicData, 0, sizeof(DownloadedTopicData));
+			memset(downloadedPostData, 0, sizeof(DownloadedPostData) * maxCount);
+			*postCountOut = 0;
+
+			const char* postXmlFilename = nullptr;
+			if(titleId == 0x0005000010143400 || titleId == 0x0005000010143500 || titleId == 0x0005000010143600)
+				postXmlFilename = "PostList_WindWakerHD.xml";
+
+			if (!postXmlFilename)
+				return OLV_RESULT_SUCCESS;
+
+			// load post XML
+			std::vector<uint8> xmlData;
+			if (!LoadOfflineDBFile(postXmlFilename, xmlData))
+				return OLV_RESULT_SUCCESS;
+			pugi::xml_document doc;
+			pugi::xml_parse_result result = doc.load_buffer(xmlData.data(), xmlData.size());
+			if (!result)
+				return OLV_RESULT_SUCCESS;
+			// collect list of all post xml nodes
+			std::vector<pugi::xml_node> postXmlNodes;
+			for (pugi::xml_node postNode = doc.child("posts").child("post"); postNode; postNode = postNode.next_sibling("post"))
+				postXmlNodes.push_back(postNode);
+
+			// randomly select up to maxCount posts
+			srand(GetTickCount());
+			uint32 postCount = 0;
+			while(!postXmlNodes.empty() && postCount < maxCount)
+			{
+				uint32 index = rand() % postXmlNodes.size();
+				pugi::xml_node& postNode = postXmlNodes[index];
+
+				auto& addedPost = downloadedPostData[postCount];
+				memset(&addedPost, 0, sizeof(DownloadedPostData));
+				if (!ParseXML_DownloadedPostData(addedPost, postNode) )
+					continue;
+				TryLoadCompressedMemoImage(addedPost);
+				CheckForExternalImage(addedPost);
+				postCount++;
+				// remove from post list
+				postXmlNodes[index] = postXmlNodes.back();
+				postXmlNodes.pop_back();
+			}
+			*postCountOut = postCount;
+			return OLV_RESULT_SUCCESS;
+		}
+
+		nnResult OfflineDB_DownloadPostDataListParam_DownloadPostDataList(DownloadedTopicData* downloadedTopicData, DownloadedPostData* downloadedPostData, uint32be* postCountOut, uint32 maxCount, DownloadPostDataListParam* param)
+		{
+			OfflineDB_LazyInit();
+
+			memset(downloadedTopicData, 0, sizeof(DownloadedTopicData));
+			downloadedTopicData->communityId = param->communityId;
+			*postCountOut = 0;
+
+			if(param->_HasFlag(DownloadPostDataListParam::FLAGS::SELF_ONLY))
+				return OLV_RESULT_SUCCESS; // the offlineDB doesn't contain any self posts
+
+			StackAllocator<coreinit::OSEvent> doneEvent;
+			coreinit::OSInitEvent(doneEvent, coreinit::OSEvent::EVENT_STATE::STATE_NOT_SIGNALED, coreinit::OSEvent::EVENT_MODE::MODE_MANUAL);
+			auto asyncTask = std::async(std::launch::async, _Async_OfflineDB_DownloadPostDataListParam_DownloadPostDataList, doneEvent.GetPointer(), downloadedTopicData, downloadedPostData, postCountOut, maxCount, param);
+			coreinit::OSWaitEvent(doneEvent);
+			nnResult r = asyncTask.get();
+			return r;
+		}
+
+		nnResult _Async_OfflineDB_DownloadPostDataListParam_DownloadExternalImageData(coreinit::OSEvent* event, DownloadedDataBase* _this, void* imageDataOut, uint32be* imageSizeOut, uint32 maxSize)
+		{
+			scope_exit _se([&](){coreinit::OSSignalEvent(event);});
+
+			if (!_this->TestFlags(_this, DownloadedDataBase::FLAGS::HAS_EXTERNAL_IMAGE))
+				return OLV_RESULT_MISSING_DATA;
+
+			// not all games may use JPEG files?
+			std::string externalImageFilename = fmt::format("image/{}.jpg", (char*)_this->postId);
+			std::vector<uint8> jpegData;
+			if (!LoadOfflineDBFile(externalImageFilename.c_str(), jpegData))
+				return OLV_RESULT_FAILED_REQUEST;
+
+			memcpy(imageDataOut, jpegData.data(), jpegData.size());
+			*imageSizeOut = jpegData.size();
+
+			return OLV_RESULT_SUCCESS;
+		}
+
+		nnResult OfflineDB_DownloadPostDataListParam_DownloadExternalImageData(DownloadedDataBase* _this, void* imageDataOut, uint32be* imageSizeOut, uint32 maxSize)
+		{
+			StackAllocator<coreinit::OSEvent> doneEvent;
+			coreinit::OSInitEvent(doneEvent, coreinit::OSEvent::EVENT_STATE::STATE_NOT_SIGNALED, coreinit::OSEvent::EVENT_MODE::MODE_MANUAL);
+			auto asyncTask = std::async(std::launch::async, _Async_OfflineDB_DownloadPostDataListParam_DownloadExternalImageData, doneEvent.GetPointer(), _this, imageDataOut, imageSizeOut, maxSize);
+			coreinit::OSWaitEvent(doneEvent);
+			nnResult r = asyncTask.get();
+			return r;
+		}
+
+	}
+}
\ No newline at end of file
diff --git a/src/Cafe/OS/libs/nn_olv/nn_olv_OfflineDB.h b/src/Cafe/OS/libs/nn_olv/nn_olv_OfflineDB.h
new file mode 100644
index 00000000..ed790479
--- /dev/null
+++ b/src/Cafe/OS/libs/nn_olv/nn_olv_OfflineDB.h
@@ -0,0 +1,16 @@
+#pragma once
+#include "Cafe/OS/libs/nn_common.h"
+#include "nn_olv_Common.h"
+
+namespace nn
+{
+	namespace olv
+	{
+		void OfflineDB_Init();
+		void OfflineDB_Shutdown();
+
+		nnResult OfflineDB_DownloadPostDataListParam_DownloadPostDataList(DownloadedTopicData* downloadedTopicData, DownloadedPostData* downloadedPostData, uint32be* postCountOut, uint32 maxCount, DownloadPostDataListParam* param);
+		nnResult OfflineDB_DownloadPostDataListParam_DownloadExternalImageData(DownloadedDataBase* _this, void* imageDataOut, uint32be* imageSizeOut, uint32 maxSize);
+
+	}
+}
\ No newline at end of file
diff --git a/src/Cafe/OS/libs/nn_olv/nn_olv_PostTypes.cpp b/src/Cafe/OS/libs/nn_olv/nn_olv_PostTypes.cpp
index 5056f2fe..722e5584 100644
--- a/src/Cafe/OS/libs/nn_olv/nn_olv_PostTypes.cpp
+++ b/src/Cafe/OS/libs/nn_olv/nn_olv_PostTypes.cpp
@@ -1,5 +1,6 @@
 #include "Cafe/OS/libs/nn_olv/nn_olv_Common.h"
 #include "nn_olv_PostTypes.h"
+#include "nn_olv_OfflineDB.h"
 #include "Cemu/ncrypto/ncrypto.h" // for base64 decoder
 #include "util/helpers/helpers.h"
 #include <pugixml.hpp>
@@ -9,41 +10,28 @@ namespace nn
 {
 	namespace olv
 	{
-
-		template<size_t TLength>
-		uint32 SetStringUC2(uint16be(&str)[TLength], std::string_view sv, bool unescape = false)
-		{
-			if(unescape)
-			{
-				// todo
-			}
-			std::wstring ws = boost::nowide::widen(sv);
-			size_t copyLen = std::min<size_t>(TLength-1, ws.size());
-			for(size_t i=0; i<copyLen; i++)
-				str[i] = ws[i];
-			str[copyLen] = '\0';
-			return copyLen;
-		}
-
 		bool ParseXml_DownloadedDataBase(DownloadedDataBase& obj, pugi::xml_node& xmlNode)
 		{
 			// todo:
-			// app_data, body, painting, name
+			// painting with url?
 
 			pugi::xml_node tokenNode;
 			if(tokenNode = xmlNode.child("body"); tokenNode)
 			{
-				//cemu_assert_unimplemented();
 				obj.bodyTextLength = SetStringUC2(obj.bodyText, tokenNode.child_value(), true);
 				if(obj.bodyTextLength > 0)
 					obj.SetFlag(DownloadedDataBase::FLAGS::HAS_BODY_TEXT);
 			}
+			if(tokenNode = xmlNode.child("topic_tag"); tokenNode)
+			{
+				SetStringUC2(obj.topicTag, tokenNode.child_value(), true);
+			}
 			if(tokenNode = xmlNode.child("feeling_id"); tokenNode)
 			{
 				obj.feeling = ConvertString<sint8>(tokenNode.child_value());
 				if(obj.feeling < 0 || obj.feeling >= 5)
 				{
-					cemuLog_log(LogType::Force, "DownloadedDataBase::ParseXml: feeling_id out of range");
+					cemuLog_log(LogType::Force, "[Olive-XML] DownloadedDataBase::ParseXml: feeling_id out of range");
 					return false;
 				}
 			}
@@ -52,7 +40,7 @@ namespace nn
 				std::string_view id_sv = tokenNode.child_value();
 				if(id_sv.size() > 22)
 				{
-					cemuLog_log(LogType::Force, "DownloadedDataBase::ParseXml: id too long");
+					cemuLog_log(LogType::Force, "[Olive-XML] DownloadedDataBase::ParseXml: id too long");
 					return false;
 				}
 				memcpy(obj.postId, id_sv.data(), id_sv.size());
@@ -67,7 +55,7 @@ namespace nn
 					obj.SetFlag(DownloadedDataBase::FLAGS::IS_NOT_AUTOPOST);
 				else
 				{
-					cemuLog_log(LogType::Force, "DownloadedDataBase::ParseXml: is_autopost has invalid value");
+					cemuLog_log(LogType::Force, "[Olive-XML] DownloadedDataBase::ParseXml: is_autopost has invalid value");
 					return false;
 				}
 			}
@@ -116,6 +104,36 @@ namespace nn
 			{
 				obj.countryId = ConvertString<uint8>(tokenNode.child_value());
 			}
+			if(tokenNode = xmlNode.child("painting"); tokenNode)
+			{
+				if(pugi::xml_node subNode = tokenNode.child("content"); subNode)
+				{
+					std::vector<uint8> paintingData = NCrypto::base64Decode(subNode.child_value());
+					if (paintingData.size() > 0xA000)
+					{
+						cemuLog_log(LogType::Force, "[Olive-XML] DownloadedDataBase painting content is too large");
+						return false;
+					}
+					memcpy(obj.compressedMemoBody, paintingData.data(), paintingData.size());
+					obj.SetFlag(DownloadedDataBase::FLAGS::HAS_BODY_MEMO);
+				}
+				if(pugi::xml_node subNode = tokenNode.child("size"); subNode)
+				{
+					obj.compressedMemoBodySize = ConvertString<uint32>(subNode.child_value());
+				}
+			}
+			if(tokenNode = xmlNode.child("app_data"); tokenNode)
+			{
+				std::vector<uint8> appData = NCrypto::base64Decode(tokenNode.child_value());
+				if (appData.size() > 0x400)
+				{
+					cemuLog_log(LogType::Force, "[Olive-XML] DownloadedDataBase AppData is too large");
+					return false;
+				}
+				memcpy(obj.appData, appData.data(), appData.size());
+				obj.appDataLength = appData.size();
+				obj.SetFlag(DownloadedDataBase::FLAGS::HAS_APP_DATA);
+			}
 			return true;
 		}
 
@@ -256,6 +274,121 @@ namespace nn
 			return 0;
 		}
 
+		nnResult DownloadedDataBase::DownloadExternalImageData(DownloadedDataBase* _this, void* imageDataOut, uint32be* imageSizeOut, uint32 maxSize)
+		{
+			if(g_IsOfflineDBMode)
+				return OfflineDB_DownloadPostDataListParam_DownloadExternalImageData(_this, imageDataOut, imageSizeOut, maxSize);
+
+			if(!g_IsOnlineMode)
+				return OLV_RESULT_OFFLINE_MODE_REQUEST;
+			if (!TestFlags(_this, FLAGS::HAS_EXTERNAL_IMAGE))
+				return OLV_RESULT_MISSING_DATA;
+
+			cemuLog_logDebug(LogType::Force, "DownloadedDataBase::DownloadExternalImageData not implemented");
+			return OLV_RESULT_FAILED_REQUEST; // placeholder error
+		}
+
+		nnResult DownloadPostDataListParam::GetRawDataUrl(DownloadPostDataListParam* _this, char* urlOut, uint32 urlMaxSize)
+		{
+			if(!g_IsOnlineMode)
+				return OLV_RESULT_OFFLINE_MODE_REQUEST;
+			//if(_this->communityId == 0)
+			//	cemuLog_log(LogType::Force, "DownloadPostDataListParam::GetRawDataUrl called with invalid communityId");
+
+			// get base url
+			std::string baseUrl;
+			baseUrl.append(g_DiscoveryResults.apiEndpoint);
+			//baseUrl.append(fmt::format("/v1/communities/{}/posts", (uint32)_this->communityId));
+			cemu_assert_debug(_this->communityId == 0);
+			baseUrl.append(fmt::format("/v1/posts.search", (uint32)_this->communityId));
+
+			// "v1/posts.search"
+
+			// build parameter string
+			std::string params;
+
+			// this function behaves differently for the Wii U menu? Where it can lookup posts by titleId?
+			if(_this->titleId != 0)
+			{
+				cemu_assert_unimplemented(); // Wii U menu mode
+			}
+
+			// todo: Generic parameters. Which includes: language_id, limit, type=text/memo
+
+			// handle postIds
+			for(size_t i=0; i<_this->MAX_NUM_POST_ID; i++)
+			{
+				if(_this->searchPostId[i].str[0] == '\0')
+					continue;
+				cemu_assert_unimplemented(); // todo
+				// todo - postId parameter
+				// handle filters
+				if(_this->_HasFlag(DownloadPostDataListParam::FLAGS::WITH_MII))
+					params.append("&with_mii=1");
+				if(_this->_HasFlag(DownloadPostDataListParam::FLAGS::WITH_EMPATHY))
+					params.append("&with_empathy_added=1");
+				if(_this->bodyTextMaxLength != 0)
+					params.append(fmt::format("&max_body_length={}", _this->bodyTextMaxLength));
+			}
+
+			if(_this->titleId != 0)
+				params.append(fmt::format("&title_id={}", (uint64)_this->titleId));
+
+			if (_this->_HasFlag(DownloadPostDataListParam::FLAGS::FRIENDS_ONLY))
+				params.append("&by=friend");
+			if (_this->_HasFlag(DownloadPostDataListParam::FLAGS::FOLLOWERS_ONLY))
+				params.append("&by=followings");
+			if (_this->_HasFlag(DownloadPostDataListParam::FLAGS::SELF_ONLY))
+				params.append("&by=self");
+
+			if(!params.empty())
+				params[0] = '?'; // replace the leading ampersand
+
+			baseUrl.append(params);
+			if(baseUrl.size()+1 > urlMaxSize)
+				return OLV_RESULT_NOT_ENOUGH_SIZE;
+			strncpy(urlOut, baseUrl.c_str(), urlMaxSize);
+			return OLV_RESULT_SUCCESS;
+		}
+
+		nnResult DownloadPostDataList(DownloadedTopicData* downloadedTopicData, DownloadedPostData* downloadedPostData, uint32be* postCountOut, uint32 maxCount, DownloadPostDataListParam* param)
+		{
+			if(g_IsOfflineDBMode)
+				return OfflineDB_DownloadPostDataListParam_DownloadPostDataList(downloadedTopicData, downloadedPostData, postCountOut, maxCount, param);
+			memset(downloadedTopicData, 0, sizeof(DownloadedTopicData));
+			downloadedTopicData->communityId = param->communityId;
+			*postCountOut = 0;
+
+			char urlBuffer[2048];
+			if (NN_RESULT_IS_FAILURE(DownloadPostDataListParam::GetRawDataUrl(param, urlBuffer, sizeof(urlBuffer))))
+				return OLV_RESULT_INVALID_PARAMETER;
+
+			/*
+			CurlRequestHelper req;
+			req.initate(urlBuffer, CurlRequestHelper::SERVER_SSL_CONTEXT::OLIVE);
+			InitializeOliveRequest(req);
+			bool reqResult = req.submitRequest();
+			if (!reqResult)
+			{
+				long httpCode = 0;
+				curl_easy_getinfo(req.getCURL(), CURLINFO_RESPONSE_CODE, &httpCode);
+				cemuLog_log(LogType::Force, "Failed request: {} ({})", urlBuffer, httpCode);
+				if (!(httpCode >= 400))
+					return OLV_RESULT_FAILED_REQUEST;
+			}
+			pugi::xml_document doc;
+			if (!doc.load_buffer(req.getReceivedData().data(), req.getReceivedData().size()))
+			{
+				cemuLog_log(LogType::Force, fmt::format("Invalid XML in community download response"));
+				return OLV_RESULT_INVALID_XML;
+			}
+			*/
+
+			*postCountOut = 0;
+
+			return OLV_RESULT_SUCCESS;
+		}
+
 		void loadOlivePostAndTopicTypes()
 		{
 			cafeExportRegisterFunc(GetSystemTopicDataListFromRawData, "nn_olv", "GetSystemTopicDataListFromRawData__Q3_2nn3olv6hiddenFPQ4_2nn3olv6hidden29DownloadedSystemTopicDataListPQ4_2nn3olv6hidden24DownloadedSystemPostDataPUiUiPCUcT4", LogType::None);
@@ -279,6 +412,8 @@ namespace nn
 			cafeExportRegisterFunc(DownloadedDataBase::GetAppDataSize, "nn_olv", "GetAppDataSize__Q3_2nn3olv18DownloadedDataBaseCFv", LogType::None);
 			cafeExportRegisterFunc(DownloadedDataBase::GetPostId, "nn_olv", "GetPostId__Q3_2nn3olv18DownloadedDataBaseCFv", LogType::None);
 			cafeExportRegisterFunc(DownloadedDataBase::GetMiiData2, "nn_olv", "GetMiiData__Q3_2nn3olv18DownloadedDataBaseCFv", LogType::None);
+			cafeExportRegisterFunc(DownloadedDataBase::DownloadExternalImageData, "nn_olv", "DownloadExternalImageData__Q3_2nn3olv18DownloadedDataBaseCFPvPUiUi", LogType::None);
+			cafeExportRegisterFunc(DownloadedDataBase::GetExternalImageDataSize, "nn_olv", "GetExternalImageDataSize__Q3_2nn3olv18DownloadedDataBaseCFv", LogType::None);
 
 			// DownloadedPostData getters
 			cafeExportRegisterFunc(DownloadedPostData::GetCommunityId, "nn_olv", "GetCommunityId__Q3_2nn3olv18DownloadedPostDataCFv", LogType::None);
@@ -305,6 +440,23 @@ namespace nn
 			cafeExportRegisterFunc(hidden::DownloadedSystemTopicDataList::GetDownloadedSystemTopicData, "nn_olv", "GetDownloadedSystemTopicData__Q4_2nn3olv6hidden29DownloadedSystemTopicDataListCFi", LogType::None);
 			cafeExportRegisterFunc(hidden::DownloadedSystemTopicDataList::GetDownloadedSystemPostData, "nn_olv", "GetDownloadedSystemPostData__Q4_2nn3olv6hidden29DownloadedSystemTopicDataListCFiT1", LogType::None);
 
+			// DownloadPostDataListParam constructor and getters
+			cafeExportRegisterFunc(DownloadPostDataListParam::Construct, "nn_olv", "__ct__Q3_2nn3olv25DownloadPostDataListParamFv", LogType::None);
+			cafeExportRegisterFunc(DownloadPostDataListParam::SetFlags, "nn_olv", "SetFlags__Q3_2nn3olv25DownloadPostDataListParamFUi", LogType::None);
+			cafeExportRegisterFunc(DownloadPostDataListParam::SetLanguageId, "nn_olv", "SetLanguageId__Q3_2nn3olv25DownloadPostDataListParamFUc", LogType::None);
+			cafeExportRegisterFunc(DownloadPostDataListParam::SetCommunityId, "nn_olv", "SetCommunityId__Q3_2nn3olv25DownloadPostDataListParamFUi", LogType::None);
+			cafeExportRegisterFunc(DownloadPostDataListParam::SetSearchKey, "nn_olv", "SetSearchKey__Q3_2nn3olv25DownloadPostDataListParamFPCwUc", LogType::None);
+			cafeExportRegisterFunc(DownloadPostDataListParam::SetSearchKeySingle, "nn_olv", "SetSearchKey__Q3_2nn3olv25DownloadPostDataListParamFPCw", LogType::None);
+			cafeExportRegisterFunc(DownloadPostDataListParam::SetSearchPid, "nn_olv", "SetSearchPid__Q3_2nn3olv25DownloadPostDataListParamFUi", LogType::None);
+			cafeExportRegisterFunc(DownloadPostDataListParam::SetPostId, "nn_olv", "SetPostId__Q3_2nn3olv25DownloadPostDataListParamFPCcUi", LogType::None);
+			cafeExportRegisterFunc(DownloadPostDataListParam::SetPostDate, "nn_olv", "SetPostDate__Q3_2nn3olv25DownloadPostDataListParamFL", LogType::None);
+			cafeExportRegisterFunc(DownloadPostDataListParam::SetPostDataMaxNum, "nn_olv", "SetPostDataMaxNum__Q3_2nn3olv25DownloadPostDataListParamFUi", LogType::None);
+			cafeExportRegisterFunc(DownloadPostDataListParam::SetBodyTextMaxLength, "nn_olv", "SetBodyTextMaxLength__Q3_2nn3olv25DownloadPostDataListParamFUi", LogType::None);
+
+			// URL and downloading functions
+			cafeExportRegisterFunc(DownloadPostDataListParam::GetRawDataUrl, "nn_olv", "GetRawDataUrl__Q3_2nn3olv25DownloadPostDataListParamCFPcUi", LogType::None);
+			cafeExportRegisterFunc(DownloadPostDataList, "nn_olv", "DownloadPostDataList__Q2_2nn3olvFPQ3_2nn3olv19DownloadedTopicDataPQ3_2nn3olv18DownloadedPostDataPUiUiPCQ3_2nn3olv25DownloadPostDataListParam", LogType::None);
+
 		}
 
 	}
diff --git a/src/Cafe/OS/libs/nn_olv/nn_olv_PostTypes.h b/src/Cafe/OS/libs/nn_olv/nn_olv_PostTypes.h
index 3ca4f87e..e6078a7a 100644
--- a/src/Cafe/OS/libs/nn_olv/nn_olv_PostTypes.h
+++ b/src/Cafe/OS/libs/nn_olv/nn_olv_PostTypes.h
@@ -1,5 +1,6 @@
 #pragma once
 #include <zlib.h>
+#include "nn_olv_Common.h"
 
 namespace nn
 {
@@ -154,8 +155,11 @@ namespace nn
 					return OLV_RESULT_INVALID_PTR;
 				if (maxLength == 0)
 					return OLV_RESULT_NOT_ENOUGH_SIZE;
+				if (!TestFlags(_this, FLAGS::HAS_BODY_TEXT))
+					return OLV_RESULT_MISSING_DATA;
+				memset(bodyTextOut, 0, maxLength * sizeof(uint16));
 				uint32 outputLength = std::min<uint32>(_this->bodyTextLength, maxLength);
-				olv_wstrncpy((char16_t*)bodyTextOut, (char16_t*)_this->bodyText, _this->bodyTextLength);
+				olv_wstrncpy((char16_t*)bodyTextOut, (char16_t*)_this->bodyText, outputLength);
 				return OLV_RESULT_SUCCESS;
 			}
 
@@ -213,9 +217,19 @@ namespace nn
 				return _this->postId;
 			}
 
-			// todo:
 			// DownloadExternalImageData__Q3_2nn3olv18DownloadedDataBaseCFPvPUiUi
+			static nnResult DownloadExternalImageData(DownloadedDataBase* _this, void* imageDataOut, uint32be* imageSizeOut, uint32 maxSize);
+
 			// GetExternalImageDataSize__Q3_2nn3olv18DownloadedDataBaseCFv
+			static uint32 GetExternalImageDataSize(DownloadedDataBase* _this)
+			{
+				if (!TestFlags(_this, FLAGS::HAS_EXTERNAL_IMAGE))
+					return 0;
+				return _this->externalImageDataSize;
+			}
+
+			// todo:
+			// DownloadExternalImageData__Q3_2nn3olv18DownloadedDataBaseCFPvPUiUi (implement downloading)
 			// DownloadExternalBinaryData__Q3_2nn3olv18DownloadedDataBaseCFPvPUiUi
 			// GetExternalBinaryDataSize__Q3_2nn3olv18DownloadedDataBaseCFv
 		};
@@ -425,6 +439,174 @@ namespace nn
 			static_assert(sizeof(DownloadedSystemTopicDataList) == 0xC1000);
 		}
 
+
+		struct DownloadPostDataListParam
+		{
+			static constexpr size_t MAX_NUM_SEARCH_PID = 12;
+			static constexpr size_t MAX_NUM_SEARCH_KEY = 5;
+			static constexpr size_t MAX_NUM_POST_ID = 20;
+
+			enum class FLAGS
+			{
+				FRIENDS_ONLY = 0x01, // friends only
+				FOLLOWERS_ONLY = 0x02, // followers only
+				SELF_ONLY = 0x04, // self only
+				ONLY_TYPE_TEXT = 0x08,
+				ONLY_TYPE_MEMO = 0x10,
+				UKN_20 = 0x20,
+				WITH_MII = 0x40, // with mii
+				WITH_EMPATHY = 0x80, // with yeahs added
+				UKN_100 = 0x100,
+				UKN_200 = 0x200, // "is_delay" parameter
+				UKN_400 = 0x400, // "is_hot" parameter
+
+
+			};
+
+			struct SearchKey
+			{
+				uint16be str[152];
+			};
+
+			struct PostId
+			{
+				char str[32];
+			};
+
+			betype<FLAGS> flags;
+			uint32be communityId;
+			uint32be searchPid[MAX_NUM_SEARCH_PID];
+			uint8 languageId;
+			uint8 hasLanguageId_039;
+			uint8 padding03A[2];
+			uint32be postDataMaxNum;
+			SearchKey searchKeyArray[MAX_NUM_SEARCH_KEY];
+			PostId searchPostId[MAX_NUM_POST_ID];
+			uint64be postDate; // OSTime?
+			uint64be titleId; // only used by System posts?
+			uint32be bodyTextMaxLength;
+			uint8 padding8C4[1852];
+
+			bool _HasFlag(FLAGS flag)
+			{
+				return ((uint32)flags.value() & (uint32)flag) != 0;
+			}
+
+			void _SetFlags(FLAGS flag)
+			{
+				flags = (FLAGS)((uint32)flags.value() | (uint32)flag);
+			}
+
+			// constructor and getters
+			// __ct__Q3_2nn3olv25DownloadPostDataListParamFv
+			static DownloadPostDataListParam* Construct(DownloadPostDataListParam* _this)
+			{
+				memset(_this, 0, sizeof(DownloadPostDataListParam));
+				return _this;
+			}
+
+			// SetFlags__Q3_2nn3olv25DownloadPostDataListParamFUi
+			static nnResult SetFlags(DownloadPostDataListParam* _this, FLAGS flags)
+			{
+				// todo - verify flag combos
+				_this->flags = flags;
+				return OLV_RESULT_SUCCESS;
+			}
+
+			// SetLanguageId__Q3_2nn3olv25DownloadPostDataListParamFUc
+			static nnResult SetLanguageId(DownloadPostDataListParam* _this, uint8 languageId)
+			{
+				_this->languageId = languageId;
+				_this->hasLanguageId_039 = 1;
+				return OLV_RESULT_SUCCESS;
+			}
+
+			// SetCommunityId__Q3_2nn3olv25DownloadPostDataListParamFUi
+			static nnResult SetCommunityId(DownloadPostDataListParam* _this, uint32 communityId)
+			{
+				_this->communityId = communityId;
+				return OLV_RESULT_SUCCESS;
+			}
+
+			// SetSearchKey__Q3_2nn3olv25DownloadPostDataListParamFPCwUc
+			static nnResult SetSearchKey(DownloadPostDataListParam* _this, const uint16be* searchKey, uint8 searchKeyIndex)
+			{
+				if (searchKeyIndex >= MAX_NUM_SEARCH_KEY)
+					return OLV_RESULT_INVALID_PARAMETER;
+				memset(&_this->searchKeyArray[searchKeyIndex], 0, sizeof(SearchKey));
+				if(olv_wstrnlen((const char16_t*)searchKey, 152) > 50)
+				{
+					cemuLog_log(LogType::Force, "DownloadPostDataListParam::SetSearchKey: searchKey is too long\n");
+					return OLV_RESULT_INVALID_PARAMETER;
+				}
+				SetStringUC2(_this->searchKeyArray[searchKeyIndex].str, searchKey);
+				return OLV_RESULT_SUCCESS;
+			}
+
+			// SetSearchKey__Q3_2nn3olv25DownloadPostDataListParamFPCw
+			static nnResult SetSearchKeySingle(DownloadPostDataListParam* _this, const uint16be* searchKey)
+			{
+				return SetSearchKey(_this, searchKey, 0);
+			}
+
+			// SetSearchPid__Q3_2nn3olv25DownloadPostDataListParamFUi
+			static nnResult SetSearchPid(DownloadPostDataListParam* _this, uint32 searchPid)
+			{
+				if(_this->_HasFlag(FLAGS::FRIENDS_ONLY) || _this->_HasFlag(FLAGS::FOLLOWERS_ONLY) || _this->_HasFlag(FLAGS::SELF_ONLY))
+					return OLV_RESULT_INVALID_PARAMETER;
+				_this->searchPid[0] = searchPid;
+				return OLV_RESULT_SUCCESS;
+			}
+
+			// SetPostId__Q3_2nn3olv25DownloadPostDataListParamFPCcUi
+			static nnResult SetPostId(DownloadPostDataListParam* _this, const char* postId, uint32 postIdIndex)
+			{
+				if (postIdIndex >= MAX_NUM_POST_ID)
+					return OLV_RESULT_INVALID_PARAMETER;
+				memset(&_this->searchPostId[postIdIndex], 0, sizeof(PostId));
+				if (strlen(postId) > 22)
+				{
+					cemuLog_log(LogType::Force, "DownloadPostDataListParam::SetPostId: postId is too long\n");
+					return OLV_RESULT_INVALID_PARAMETER;
+				}
+				strcpy(_this->searchPostId[postIdIndex].str, postId);
+				return OLV_RESULT_SUCCESS;
+			}
+
+			// SetPostDate__Q3_2nn3olv25DownloadPostDataListParamFL
+			static nnResult SetPostDate(DownloadPostDataListParam* _this, uint64 postDate)
+			{
+				_this->postDate = postDate;
+				return OLV_RESULT_SUCCESS;
+			}
+
+			// SetPostDataMaxNum__Q3_2nn3olv25DownloadPostDataListParamFUi
+			static nnResult SetPostDataMaxNum(DownloadPostDataListParam* _this, uint32 postDataMaxNum)
+			{
+				if(postDataMaxNum == 0)
+					return OLV_RESULT_INVALID_PARAMETER;
+				_this->postDataMaxNum = postDataMaxNum;
+				return OLV_RESULT_SUCCESS;
+			}
+
+			// SetBodyTextMaxLength__Q3_2nn3olv25DownloadPostDataListParamFUi
+			static nnResult SetBodyTextMaxLength(DownloadPostDataListParam* _this, uint32 bodyTextMaxLength)
+			{
+				if(bodyTextMaxLength >= 256)
+					return OLV_RESULT_INVALID_PARAMETER;
+				_this->bodyTextMaxLength = bodyTextMaxLength;
+				return OLV_RESULT_SUCCESS;
+			}
+
+			// GetRawDataUrl__Q3_2nn3olv25DownloadPostDataListParamCFPcUi
+			static nnResult GetRawDataUrl(DownloadPostDataListParam* _this, char* urlOut, uint32 urlMaxSize);
+		};
+
+		static_assert(sizeof(DownloadPostDataListParam) == 0x1000);
+
+		// parsing functions
+		bool ParseXML_DownloadedPostData(DownloadedPostData& obj, pugi::xml_node& xmlNode);
+
 		void loadOlivePostAndTopicTypes();
 	}
 }
\ No newline at end of file
diff --git a/src/Cafe/TitleList/TitleList.cpp b/src/Cafe/TitleList/TitleList.cpp
index 7f42d17c..2e50cbf9 100644
--- a/src/Cafe/TitleList/TitleList.cpp
+++ b/src/Cafe/TitleList/TitleList.cpp
@@ -9,7 +9,7 @@ bool sTLInitialized{ false };
 fs::path sTLCacheFilePath;
 
 // lists for tracking known titles
-// note: The list may only contain titles with valid meta data. Entries loaded from the cache may not have been parsed yet, but they will use a cached value for titleId and titleVersion
+// note: The list may only contain titles with valid meta data (except for certain system titles). Entries loaded from the cache may not have been parsed yet, but they will use a cached value for titleId and titleVersion
 std::mutex sTLMutex;
 std::vector<TitleInfo*> sTLList;
 std::vector<TitleInfo*> sTLListPending;
diff --git a/src/Common/precompiled.h b/src/Common/precompiled.h
index 56f31a03..7152f2c1 100644
--- a/src/Common/precompiled.h
+++ b/src/Common/precompiled.h
@@ -485,6 +485,14 @@ bool future_is_ready(std::future<T>& f)
 #endif
 }
 
+// replace with std::scope_exit once available
+struct scope_exit
+{
+	std::function<void()> f_;
+	explicit scope_exit(std::function<void()> f) noexcept : f_(std::move(f)) {}
+	~scope_exit() { if (f_) f_(); }
+};
+
 // helper function to cast raw pointers to std::atomic
 // this is technically not legal but works on most platforms as long as alignment restrictions are met and the implementation of atomic doesnt come with additional members