diff --git a/installer/Makefile b/installer/Makefile
index 099ff78..66436da 100644
--- a/installer/Makefile
+++ b/installer/Makefile
@@ -16,7 +16,7 @@ sd_loader_elf := ../sd_loader/sd_loader.elf
 CFLAGS += -DUSE_SD_LOADER
 ASFLAGS += -DUSE_SD_LOADER
 
-all: clean setup main532
+all: clean setup main532 main500
 
 sd_loader.h: $(sd_loader_elf)
 	xxd -i $< | sed "s/unsigned/static const unsigned/g;s/loader/loader/g;s/build_//g" > $@
diff --git a/installer/kernel_patches.S b/installer/kernel_patches.S
index e467c03..238fcb4 100644
--- a/installer/kernel_patches.S
+++ b/installer/kernel_patches.S
@@ -16,6 +16,17 @@
 
 #elif ((VER == 500) || (VER == 510))
     #define BAT_SETUP_HOOK_ADDR         0xFFF1D518
+
+    #define BAT_SET_NOP_ADDR_1          0xFFF0697C
+    #define BAT_SET_NOP_ADDR_2          0xFFF06A08
+    #define BAT_SET_NOP_ADDR_3          0xFFF003C8
+    #define BAT_SET_NOP_ADDR_4          0xFFF003CC
+    #define BAT_SET_NOP_ADDR_5          0xFFF1D600
+    #define BAT_SET_NOP_ADDR_6          0xFFF1D61C
+    #define BAT_SET_NOP_ADDR_7          0xFFF1D720
+
+    #define BAT_SET_NOP_ADDR_8          0xFFEE10B8
+    #define BAT_SET_NOP_ADDR_9          0xFFEE10BC
 #elif ( (VER == 400) || (VER == 410) )
     #define BAT_SETUP_HOOK_ADDR         0xFFF1AD00
 #else
diff --git a/installer/launcher.c b/installer/launcher.c
index 493ff1b..21c9aee 100644
--- a/installer/launcher.c
+++ b/installer/launcher.c
@@ -27,9 +27,11 @@
     #define ADDRESS_OSTitle_main_entry_ptr              0x1005CB00
     #define ADDRESS_main_entry_hook                     0x0101C15C
 
-    #define KERN_SYSCALL_TBL_5                          0xFFEA9520 // works with browser
-
-    #define PREP_TITLE_HOOK_ADDR                        0xFFF18534
+    #define KERN_SYSCALL_TBL_1                          0xFFE84C70 // unknown
+    #define KERN_SYSCALL_TBL_2                          0xFFE85070 // works with games
+    #define KERN_SYSCALL_TBL_3                          0xFFE85470 // works with loader
+    #define KERN_SYSCALL_TBL_4                          0xFFEA9120 // works with home menu
+    #define KERN_SYSCALL_TBL_5                          0xFFEA9520 // works with browser (previously KERN_SYSCALL_TBL)
 #elif ( (VER == 400) || (VER == 410) )
     #define ADDRESS_OSTitle_main_entry_ptr              0x1005A8C0
     #define ADDRESS_main_entry_hook                     0x0101BD4C
diff --git a/src/dynamic_libs/socket_functions.c b/src/dynamic_libs/socket_functions.c
index 9b8c9b1..aac9e8d 100644
--- a/src/dynamic_libs/socket_functions.c
+++ b/src/dynamic_libs/socket_functions.c
@@ -47,17 +47,6 @@ void InitSocketFunctionPointers(void)
     unsigned int *funcPointer = 0;
     OSDynLoad_Acquire("nsysnet.rpl", &nsysnet_handle);
 
-    unsigned int nn_ac_handle;
-    int(*ACInitialize)();
-    int(*ACGetStartupId) (unsigned int *id);
-    int(*ACConnectWithConfigId) (unsigned int id);
-    int(*ACGetAssignedAddress) (u32 * ip);
-    OSDynLoad_Acquire("nn_ac.rpl", &nn_ac_handle);
-    OSDynLoad_FindExport(nn_ac_handle, 0, "ACInitialize", &ACInitialize);
-    OSDynLoad_FindExport(nn_ac_handle, 0, "ACGetStartupId", &ACGetStartupId);
-    OSDynLoad_FindExport(nn_ac_handle, 0, "ACConnectWithConfigId",&ACConnectWithConfigId);
-    OSDynLoad_FindExport(nn_ac_handle, 0, "ACGetAssignedAddress",&ACGetAssignedAddress);
-
     OS_FIND_EXPORT(nsysnet_handle, socket_lib_init);
     OS_FIND_EXPORT(nsysnet_handle, socket);
     OS_FIND_EXPORT(nsysnet_handle, socketclose);
@@ -73,12 +62,6 @@ void InitSocketFunctionPointers(void)
     OS_FIND_EXPORT(nsysnet_handle, inet_ntoa);
     OS_FIND_EXPORT(nsysnet_handle, inet_aton);
 
-    unsigned int nn_startupid;
-    ACInitialize();
-    ACGetStartupId(&nn_startupid);
-    ACConnectWithConfigId(nn_startupid);
-    ACGetAssignedAddress(&hostIpAddress);
-
     socket_lib_init();
 }
 
diff --git a/src/sounds/SoundHandler.cpp b/src/sounds/SoundHandler.cpp
index c5ba819..60a55a6 100644
--- a/src/sounds/SoundHandler.cpp
+++ b/src/sounds/SoundHandler.cpp
@@ -25,6 +25,7 @@
  ***************************************************************************/
 #include <unistd.h>
 #include <malloc.h>
+#include "common/common.h"
 #include "dynamic_libs/ax_functions.h"
 #include "fs/CFile.hpp"
 #include "SoundHandler.hpp"
@@ -256,7 +257,15 @@ void SoundHandler::executeThread()
     AXRegisterFrameCallback(NULL);
     AXQuit();
 
-	for(u32 i = 0; i < MAX_DECODERS; ++i)
+    // deleting the last voice from the decoder produced DSI errors on 5.0.0 so we skip it
+    // expecting same behaviour on every FW below 532
+    u32 delete_skip = 0;
+    if(OS_FIRMWARE < 532)
+    {
+        delete_skip = 1;
+    }
+    
+	for(u32 i = 0; i < MAX_DECODERS - delete_skip; ++i)
     {
         delete voiceList[i];
         voiceList[i] = NULL;