diff --git a/src/core/libraries/kernel/event_flag/event_flag.cpp b/src/core/libraries/kernel/event_flag/event_flag.cpp
index b8cac4f3..8afd139c 100644
--- a/src/core/libraries/kernel/event_flag/event_flag.cpp
+++ b/src/core/libraries/kernel/event_flag/event_flag.cpp
@@ -54,14 +54,19 @@ int PS4_SYSV_ABI sceKernelCreateEventFlag(OrbisKernelEventFlag* ef, const char*
         UNREACHABLE();
     }
 
-    ASSERT_MSG(queue_mode == EventFlagInternal::QueueMode::Fifo,
-               "ThreadPriority attr is not supported!");
+    if (queue_mode == EventFlagInternal::QueueMode::ThreadPrio) {
+        LOG_ERROR(Kernel_Event, "ThreadPriority attr is not supported!");
+    }
 
     *ef = new EventFlagInternal(std::string(pName), thread_mode, queue_mode, initPattern);
     return ORBIS_OK;
 }
 int PS4_SYSV_ABI sceKernelDeleteEventFlag(OrbisKernelEventFlag ef) {
-    LOG_ERROR(Kernel_Event, "(STUBBED) called");
+    if (ef == nullptr) {
+        return ORBIS_KERNEL_ERROR_ESRCH;
+    }
+
+    delete ef;
     return ORBIS_OK;
 }
 int PS4_SYSV_ABI sceKernelOpenEventFlag() {
diff --git a/src/core/libraries/kernel/file_system.cpp b/src/core/libraries/kernel/file_system.cpp
index 0adb058e..c3b6c3ae 100644
--- a/src/core/libraries/kernel/file_system.cpp
+++ b/src/core/libraries/kernel/file_system.cpp
@@ -9,6 +9,7 @@
 #include "core/libraries/error_codes.h"
 #include "core/libraries/kernel/file_system.h"
 #include "core/libraries/libs.h"
+#include "libkernel.h"
 
 namespace Libraries::Kernel {
 
@@ -59,7 +60,8 @@ int PS4_SYSV_ABI sceKernelOpen(const char* path, int flags, u16 mode) {
         file->m_guest_name = path;
         file->m_host_name = mnt->GetHostDirectory(file->m_guest_name);
         if (!std::filesystem::is_directory(file->m_host_name)) { // directory doesn't exist
-            UNREACHABLE();                                       // not supported yet
+            h->DeleteHandle(handle);
+            return ORBIS_KERNEL_ERROR_ENOTDIR;
         } else {
             if (create) {
                 return handle; // dir already exists
@@ -99,7 +101,10 @@ int PS4_SYSV_ABI posix_open(const char* path, int flags, /* SceKernelMode*/ u16
     LOG_INFO(Kernel_Fs, "posix open redirect to sceKernelOpen");
     int result = sceKernelOpen(path, flags, mode);
     // Posix calls different only for their return values
-    ASSERT(result >= 0);
+    if (result < 0) {
+        ErrSceToPosix(result);
+        return -1;
+    }
     return result;
 }
 
@@ -122,7 +127,13 @@ int PS4_SYSV_ABI sceKernelClose(int d) {
 }
 
 int PS4_SYSV_ABI posix_close(int d) {
-    ASSERT(sceKernelClose(d) == 0);
+    int result = sceKernelClose(d);
+    if (result < 0) {
+        LOG_ERROR(Kernel_Pthread, "posix_close: error = {}", result);
+        ErrSceToPosix(result);
+        return -1;
+    }
+    return result;
     return ORBIS_OK;
 }
 
@@ -175,7 +186,13 @@ s64 PS4_SYSV_ABI sceKernelLseek(int d, s64 offset, int whence) {
 }
 
 s64 PS4_SYSV_ABI posix_lseek(int d, s64 offset, int whence) {
-    return sceKernelLseek(d, offset, whence);
+    int result = sceKernelLseek(d, offset, whence);
+    if (result < 0) {
+        LOG_ERROR(Kernel_Pthread, "posix_lseek: error = {}", result);
+        ErrSceToPosix(result);
+        return -1;
+    }
+    return result;
 }
 
 s64 PS4_SYSV_ABI sceKernelRead(int d, void* buf, size_t nbytes) {
@@ -190,7 +207,13 @@ s64 PS4_SYSV_ABI sceKernelRead(int d, void* buf, size_t nbytes) {
 }
 
 int PS4_SYSV_ABI posix_read(int d, void* buf, size_t nbytes) {
-    return sceKernelRead(d, buf, nbytes);
+    int result = sceKernelRead(d, buf, nbytes);
+    if (result < 0) {
+        LOG_ERROR(Kernel_Pthread, "posix_read: error = {}", result);
+        ErrSceToPosix(result);
+        return -1;
+    }
+    return result;
 }
 
 int PS4_SYSV_ABI sceKernelMkdir(const char* path, u16 mode) {
@@ -215,7 +238,13 @@ int PS4_SYSV_ABI sceKernelMkdir(const char* path, u16 mode) {
 }
 
 int PS4_SYSV_ABI posix_mkdir(const char* path, u16 mode) {
-    return sceKernelMkdir(path, mode);
+    int result = sceKernelMkdir(path, mode);
+    if (result < 0) {
+        LOG_ERROR(Kernel_Pthread, "posix_mkdir: error = {}", result);
+        ErrSceToPosix(result);
+        return -1;
+    }
+    return result;
 }
 
 int PS4_SYSV_ABI sceKernelStat(const char* path, OrbisKernelStat* sb) {
@@ -246,9 +275,10 @@ int PS4_SYSV_ABI sceKernelStat(const char* path, OrbisKernelStat* sb) {
 
 int PS4_SYSV_ABI posix_stat(const char* path, OrbisKernelStat* sb) {
     int result = sceKernelStat(path, sb);
-    if (result != 0) {
+    if (result < 0) {
         LOG_ERROR(Kernel_Pthread, "posix_stat: error = {}", result);
-        result += ORBIS_KERNEL_ERROR_UNKNOWN;
+        ErrSceToPosix(result);
+        return -1;
     }
     return result;
 }
@@ -308,7 +338,13 @@ int PS4_SYSV_ABI sceKernelFStat(int fd, OrbisKernelStat* sb) {
 }
 
 int PS4_SYSV_ABI posix_fstat(int fd, OrbisKernelStat* sb) {
-    return sceKernelFStat(fd, sb);
+    int result = sceKernelFStat(fd, sb);
+    if (result < 0) {
+        LOG_ERROR(Kernel_Pthread, "posix_fstat: error = {}", result);
+        ErrSceToPosix(result);
+        return -1;
+    }
+    return result;
 }
 
 s32 PS4_SYSV_ABI sceKernelFsync(int fd) {
diff --git a/src/core/libraries/kernel/libkernel.cpp b/src/core/libraries/kernel/libkernel.cpp
index e7e7d11d..74a1ab7a 100644
--- a/src/core/libraries/kernel/libkernel.cpp
+++ b/src/core/libraries/kernel/libkernel.cpp
@@ -63,9 +63,16 @@ size_t PS4_SYSV_ABI _writev(int fd, const struct iovec* iov, int iovcn) {
     return total_written;
 }
 
-static thread_local int libc_error{};
+static thread_local int g_posix_errno = 0;
 int* PS4_SYSV_ABI __Error() {
-    return &libc_error;
+    return &g_posix_errno;
+}
+
+void ErrSceToPosix(int result) {
+    int rt = result > SCE_KERNEL_ERROR_UNKNOWN && result <= SCE_KERNEL_ERROR_ESTOP
+                 ? result + -SCE_KERNEL_ERROR_UNKNOWN
+                 : POSIX_EOTHER;
+    g_posix_errno = rt;
 }
 
 int PS4_SYSV_ABI sceKernelMmap(void* addr, u64 len, int prot, int flags, int fd, size_t offset,
diff --git a/src/core/libraries/kernel/libkernel.h b/src/core/libraries/kernel/libkernel.h
index 0cc6b0b2..04dc8ba5 100644
--- a/src/core/libraries/kernel/libkernel.h
+++ b/src/core/libraries/kernel/libkernel.h
@@ -12,6 +12,8 @@ class SymbolsResolver;
 
 namespace Libraries::Kernel {
 
+void ErrSceToPosix(int result);
+
 struct OrbisTimesec {
     time_t t;
     u32 west_sec;
diff --git a/src/core/libraries/network/net.cpp b/src/core/libraries/network/net.cpp
index 6ea85a1d..1569a51c 100644
--- a/src/core/libraries/network/net.cpp
+++ b/src/core/libraries/network/net.cpp
@@ -1,6 +1,16 @@
 // SPDX-FileCopyrightText: Copyright 2024 shadPS4 Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+#ifdef WIN32
+#define _WINSOCK_DEPRECATED_NO_WARNINGS
+#include <Ws2tcpip.h>
+#include <iphlpapi.h>
+#include <winsock2.h>
+#else
+#include <arpa/inet.h>
+#endif
+
+#include <common/assert.h>
 #include "common/logging/log.h"
 #include "core/libraries/error_codes.h"
 #include "core/libraries/libs.h"
@@ -48,7 +58,7 @@ int PS4_SYSV_ABI sce_net_in6addr_nodelocal_allnodes() {
     return ORBIS_OK;
 }
 
-int PS4_SYSV_ABI sceNetAccept() {
+OrbisNetId PS4_SYSV_ABI sceNetAccept(OrbisNetId s, OrbisNetSockaddr* addr, u32* paddrlen) {
     LOG_ERROR(Lib_Net, "(STUBBED) called");
     return ORBIS_OK;
 }
@@ -108,7 +118,7 @@ int PS4_SYSV_ABI sceNetBandwidthControlSetPolicy() {
     return ORBIS_OK;
 }
 
-int PS4_SYSV_ABI sceNetBind() {
+int PS4_SYSV_ABI sceNetBind(OrbisNetId s, const OrbisNetSockaddr* addr, u32 addrlen) {
     LOG_ERROR(Lib_Net, "(STUBBED) called");
     return ORBIS_OK;
 }
@@ -668,12 +678,12 @@ int PS4_SYSV_ABI sceNetGetSockInfo6() {
     return ORBIS_OK;
 }
 
-int PS4_SYSV_ABI sceNetGetsockname() {
+int PS4_SYSV_ABI sceNetGetsockname(OrbisNetId s, OrbisNetSockaddr* addr, u32* paddrlen) {
     LOG_ERROR(Lib_Net, "(STUBBED) called");
     return ORBIS_OK;
 }
 
-int PS4_SYSV_ABI sceNetGetsockopt() {
+int PS4_SYSV_ABI sceNetGetsockopt(OrbisNetId s, int level, int optname, void* optval, u32* optlen) {
     LOG_ERROR(Lib_Net, "(STUBBED) called");
     return ORBIS_OK;
 }
@@ -693,24 +703,28 @@ int PS4_SYSV_ABI sceNetGetSystemTime() {
     return ORBIS_OK;
 }
 
-int PS4_SYSV_ABI sceNetHtonl() {
-    LOG_ERROR(Lib_Net, "(STUBBED) called");
-    return ORBIS_OK;
+u32 PS4_SYSV_ABI sceNetHtonl(u32 host32) {
+    return htonl(host32);
 }
 
-int PS4_SYSV_ABI sceNetHtonll() {
-    LOG_ERROR(Lib_Net, "(STUBBED) called");
-    return ORBIS_OK;
+u64 PS4_SYSV_ABI sceNetHtonll(u64 host64) {
+    return HTONLL(host64);
 }
 
-int PS4_SYSV_ABI sceNetHtons() {
-    LOG_ERROR(Lib_Net, "(STUBBED) called");
-    return ORBIS_OK;
+u16 PS4_SYSV_ABI sceNetHtons(u16 host16) {
+    return htons(host16);
 }
 
-int PS4_SYSV_ABI sceNetInetNtop() {
-    LOG_ERROR(Lib_Net, "(STUBBED) called");
-    return ORBIS_OK;
+const char* PS4_SYSV_ABI sceNetInetNtop(int af, const void* src, char* dst, u32 size) {
+#ifdef WIN32
+    const char* res = InetNtopA(af, src, dst, size);
+#else
+    const char* res = inet_ntop(af, src, dst, size);
+#endif
+    if (res == nullptr) {
+        UNREACHABLE();
+    }
+    return dst;
 }
 
 int PS4_SYSV_ABI sceNetInetNtopWithScopeId() {
@@ -773,9 +787,8 @@ int PS4_SYSV_ABI sceNetMemoryFree() {
     return ORBIS_OK;
 }
 
-int PS4_SYSV_ABI sceNetNtohl() {
-    LOG_ERROR(Lib_Net, "(STUBBED) called");
-    return ORBIS_OK;
+u32 PS4_SYSV_ABI sceNetNtohl(u32 net32) {
+    return ntohl(net32);
 }
 
 int PS4_SYSV_ABI sceNetNtohll() {
@@ -783,9 +796,8 @@ int PS4_SYSV_ABI sceNetNtohll() {
     return ORBIS_OK;
 }
 
-int PS4_SYSV_ABI sceNetNtohs() {
-    LOG_ERROR(Lib_Net, "(STUBBED) called");
-    return ORBIS_OK;
+u16 PS4_SYSV_ABI sceNetNtohs(u16 net16) {
+    return ntohs(net16);
 }
 
 int PS4_SYSV_ABI sceNetPoolCreate(const char* name, int size, int flags) {
@@ -813,7 +825,8 @@ int PS4_SYSV_ABI sceNetRecv() {
     return ORBIS_OK;
 }
 
-int PS4_SYSV_ABI sceNetRecvfrom() {
+int PS4_SYSV_ABI sceNetRecvfrom(OrbisNetId s, void* buf, size_t len, int flags,
+                                OrbisNetSockaddr* addr, u32* paddrlen) {
     LOG_ERROR(Lib_Net, "(STUBBED) called");
     return ORBIS_OK;
 }
@@ -1018,7 +1031,7 @@ int PS4_SYSV_ABI sceNetShutdown() {
     return ORBIS_OK;
 }
 
-int PS4_SYSV_ABI sceNetSocket() {
+int PS4_SYSV_ABI sceNetSocket(const char* name, int family, int type, int protocol) {
     LOG_ERROR(Lib_Net, "(STUBBED) called");
     return ORBIS_OK;
 }
diff --git a/src/core/libraries/network/net.h b/src/core/libraries/network/net.h
index e4244f45..965b7680 100644
--- a/src/core/libraries/network/net.h
+++ b/src/core/libraries/network/net.h
@@ -9,8 +9,20 @@ namespace Core::Loader {
 class SymbolsResolver;
 }
 
+// Define our own htonll and ntohll because its not available in some systems/platforms
+#define HTONLL(x) (((uint64_t)htonl((x) & 0xFFFFFFFFUL)) << 32) | htonl((uint32_t)((x) >> 32))
+#define NTOHLL(x) (((uint64_t)ntohl((x) & 0xFFFFFFFFUL)) << 32) | ntohl((uint32_t)((x) >> 32))
+
 namespace Libraries::Net {
 
+using OrbisNetId = s32;
+
+struct OrbisNetSockaddr {
+    u8 sa_len;
+    u8 sa_family;
+    char sa_data[14];
+};
+
 int PS4_SYSV_ABI in6addr_any();
 int PS4_SYSV_ABI in6addr_loopback();
 int PS4_SYSV_ABI sce_net_dummy();
@@ -19,7 +31,7 @@ int PS4_SYSV_ABI sce_net_in6addr_linklocal_allnodes();
 int PS4_SYSV_ABI sce_net_in6addr_linklocal_allrouters();
 int PS4_SYSV_ABI sce_net_in6addr_loopback();
 int PS4_SYSV_ABI sce_net_in6addr_nodelocal_allnodes();
-int PS4_SYSV_ABI sceNetAccept();
+OrbisNetId PS4_SYSV_ABI sceNetAccept(OrbisNetId s, OrbisNetSockaddr* addr, u32* paddrlen);
 int PS4_SYSV_ABI sceNetAddrConfig6GetInfo();
 int PS4_SYSV_ABI sceNetAddrConfig6Start();
 int PS4_SYSV_ABI sceNetAddrConfig6Stop();
@@ -31,7 +43,7 @@ int PS4_SYSV_ABI sceNetBandwidthControlGetPolicy();
 int PS4_SYSV_ABI sceNetBandwidthControlSetDefaultParam();
 int PS4_SYSV_ABI sceNetBandwidthControlSetIfParam();
 int PS4_SYSV_ABI sceNetBandwidthControlSetPolicy();
-int PS4_SYSV_ABI sceNetBind();
+int PS4_SYSV_ABI sceNetBind(OrbisNetId s, const OrbisNetSockaddr* addr, u32 addrlen);
 int PS4_SYSV_ABI sceNetClearDnsCache();
 int PS4_SYSV_ABI sceNetConfigAddArp();
 int PS4_SYSV_ABI sceNetConfigAddArpWithInterface();
@@ -143,15 +155,15 @@ int PS4_SYSV_ABI sceNetGetRandom();
 int PS4_SYSV_ABI sceNetGetRouteInfo();
 int PS4_SYSV_ABI sceNetGetSockInfo();
 int PS4_SYSV_ABI sceNetGetSockInfo6();
-int PS4_SYSV_ABI sceNetGetsockname();
-int PS4_SYSV_ABI sceNetGetsockopt();
+int PS4_SYSV_ABI sceNetGetsockname(OrbisNetId s, OrbisNetSockaddr* addr, u32* paddrlen);
+int PS4_SYSV_ABI sceNetGetsockopt(OrbisNetId s, int level, int optname, void* optval, u32* optlen);
 int PS4_SYSV_ABI sceNetGetStatisticsInfo();
 int PS4_SYSV_ABI sceNetGetStatisticsInfoInternal();
 int PS4_SYSV_ABI sceNetGetSystemTime();
-int PS4_SYSV_ABI sceNetHtonl();
-int PS4_SYSV_ABI sceNetHtonll();
-int PS4_SYSV_ABI sceNetHtons();
-int PS4_SYSV_ABI sceNetInetNtop();
+u32 PS4_SYSV_ABI sceNetHtonl(u32 host32);
+u64 PS4_SYSV_ABI sceNetHtonll(u64 host64);
+u16 PS4_SYSV_ABI sceNetHtons(u16 host16);
+const char* PS4_SYSV_ABI sceNetInetNtop(int af, const void* src, char* dst, u32 size);
 int PS4_SYSV_ABI sceNetInetNtopWithScopeId();
 int PS4_SYSV_ABI sceNetInetPton();
 int PS4_SYSV_ABI sceNetInetPtonEx();
@@ -164,15 +176,16 @@ int PS4_SYSV_ABI sceNetIoctl();
 int PS4_SYSV_ABI sceNetListen();
 int PS4_SYSV_ABI sceNetMemoryAllocate();
 int PS4_SYSV_ABI sceNetMemoryFree();
-int PS4_SYSV_ABI sceNetNtohl();
+u32 PS4_SYSV_ABI sceNetNtohl(u32 net32);
 int PS4_SYSV_ABI sceNetNtohll();
-int PS4_SYSV_ABI sceNetNtohs();
+u16 PS4_SYSV_ABI sceNetNtohs(u16 net16);
 int PS4_SYSV_ABI sceNetPoolCreate(const char* name, int size, int flags);
 int PS4_SYSV_ABI sceNetPoolDestroy();
 int PS4_SYSV_ABI sceNetPppoeStart();
 int PS4_SYSV_ABI sceNetPppoeStop();
 int PS4_SYSV_ABI sceNetRecv();
-int PS4_SYSV_ABI sceNetRecvfrom();
+int PS4_SYSV_ABI sceNetRecvfrom(OrbisNetId s, void* buf, size_t len, int flags,
+                                OrbisNetSockaddr* addr, u32* paddrlen);
 int PS4_SYSV_ABI sceNetRecvmsg();
 int PS4_SYSV_ABI sceNetResolverAbort();
 int PS4_SYSV_ABI sceNetResolverConnect();
@@ -213,7 +226,7 @@ int PS4_SYSV_ABI sceNetShowRoute6WithMemory();
 int PS4_SYSV_ABI sceNetShowRouteForBuffer();
 int PS4_SYSV_ABI sceNetShowRouteWithMemory();
 int PS4_SYSV_ABI sceNetShutdown();
-int PS4_SYSV_ABI sceNetSocket();
+int PS4_SYSV_ABI sceNetSocket(const char* name, int family, int type, int protocol);
 int PS4_SYSV_ABI sceNetSocketAbort();
 int PS4_SYSV_ABI sceNetSocketClose();
 int PS4_SYSV_ABI sceNetSyncCreate();
diff --git a/src/core/libraries/save_data/savedata.cpp b/src/core/libraries/save_data/savedata.cpp
index a2086af2..d4f04a25 100644
--- a/src/core/libraries/save_data/savedata.cpp
+++ b/src/core/libraries/save_data/savedata.cpp
@@ -351,6 +351,7 @@ s32 saveDataMount(u32 user_id, std::string dir_name, u32 mount_mode,
         mount_result->mount_status = 0;
         strncpy(mount_result->mount_point.data, g_mount_point.c_str(), 16);
     } break;
+    case ORBIS_SAVE_DATA_MOUNT_MODE_CREATE:
     case ORBIS_SAVE_DATA_MOUNT_MODE_CREATE | ORBIS_SAVE_DATA_MOUNT_MODE_RDONLY:
     case ORBIS_SAVE_DATA_MOUNT_MODE_CREATE | ORBIS_SAVE_DATA_MOUNT_MODE_RDWR:
     case ORBIS_SAVE_DATA_MOUNT_MODE_CREATE | ORBIS_SAVE_DATA_MOUNT_MODE_RDWR |
diff --git a/src/emulator.cpp b/src/emulator.cpp
index 77ba91f0..11b506c5 100644
--- a/src/emulator.cpp
+++ b/src/emulator.cpp
@@ -140,11 +140,13 @@ void Emulator::Run(const std::filesystem::path& file) {
 
 void Emulator::LoadSystemModules(const std::filesystem::path& file) {
 
-    constexpr std::array<SysModules, 4> ModulesToLoad{
+    constexpr std::array<SysModules, 6> ModulesToLoad{
         {{"libSceNgs2.sprx", nullptr},
          {"libSceLibcInternal.sprx", &Libraries::LibcInternal::RegisterlibSceLibcInternal},
          {"libSceDiscMap.sprx", &Libraries::DiscMap::RegisterlibSceDiscMap},
-         {"libSceRtc.sprx", &Libraries::Rtc::RegisterlibSceRtc}}};
+         {"libSceRtc.sprx", &Libraries::Rtc::RegisterlibSceRtc},
+         {"libSceJpegEnc.sprx", nullptr},
+         {"libSceJson2.sprx", nullptr}}};
 
     std::vector<std::filesystem::path> found_modules;
     const auto& sys_module_path = Common::FS::GetUserPath(Common::FS::PathType::SysModuleDir);