diff --git a/rpcs3/Emu/Cell/SPUThread.h b/rpcs3/Emu/Cell/SPUThread.h
index bae99599e2..6ccfc574be 100644
--- a/rpcs3/Emu/Cell/SPUThread.h
+++ b/rpcs3/Emu/Cell/SPUThread.h
@@ -969,10 +969,10 @@ public:
 			}
 			else
 			{
-				u8 code = v >> 24;
+				const u8 code = v >> 24;
 				if (code < 64)
 				{
-					/* ===== sys_spu_thread_send_event ===== */
+					/* ===== sys_spu_thread_send_event (used by spu_printf) ===== */
 
 					u8 spup = code & 63;
 
@@ -1001,13 +1001,12 @@ public:
 
 					if (!port.eq)
 					{
-						// spu_printf fails there
 						LOG_WARNING(Log::SPU, "sys_spu_thread_send_event(spup=%d, data0=0x%x, data1=0x%x): event queue not connected", spup, (v & 0x00ffffff), data);
 						SPU.In_MBox.PushUncond(CELL_ENOTCONN); // TODO: check error passing
 						return;
 					}
 
-					if (!port.eq->events.push(SYS_SPU_THREAD_EVENT_USER_KEY, GetCurrentCPUThread()->GetId(), ((u64)code << 32) | (v & 0x00ffffff), data))
+					if (!port.eq->events.push(SYS_SPU_THREAD_EVENT_USER_KEY, GetCurrentCPUThread()->GetId(), ((u64)spup << 32) | (v & 0x00ffffff), data))
 					{
 						SPU.In_MBox.PushUncond(CELL_EBUSY);
 						return;
@@ -1016,6 +1015,43 @@ public:
 					SPU.In_MBox.PushUncond(CELL_OK);
 					return;
 				}
+				else if (code < 128)
+				{
+					/* ===== sys_spu_thread_throw_event ===== */
+
+					const u8 spup = code & 63;
+
+					u32 data;
+					if (!SPU.Out_MBox.Pop(data))
+					{
+						LOG_ERROR(Log::SPU, "sys_spu_thread_throw_event(v=0x%x, spup=%d): Out_MBox is empty", v, spup);
+						return;
+					}
+
+					//if (Ini.HLELogging.GetValue())
+					{
+						LOG_WARNING(Log::SPU, "sys_spu_thread_throw_event(spup=%d, data0=0x%x, data1=0x%x)", spup, v & 0x00ffffff, data);
+					}
+
+					EventPort& port = SPUPs[spup];
+
+					std::lock_guard<std::mutex> lock(port.m_mutex);
+
+					if (!port.eq)
+					{
+						LOG_WARNING(Log::SPU, "sys_spu_thread_throw_event(spup=%d, data0=0x%x, data1=0x%x): event queue not connected", spup, (v & 0x00ffffff), data);
+						return;
+					}
+
+					// TODO: check passing spup value
+					if (!port.eq->events.push(SYS_SPU_THREAD_EVENT_USER_KEY, GetCurrentCPUThread()->GetId(), ((u64)spup << 32) | (v & 0x00ffffff), data))
+					{
+						LOG_WARNING(Log::SPU, "sys_spu_thread_throw_event(spup=%d, data0=0x%x, data1=0x%x) failed (queue is full)", spup, (v & 0x00ffffff), data);
+						return;
+					}
+
+					return;
+				}
 				else if (code == 128)
 				{
 					/* ===== sys_event_flag_set_bit ===== */
diff --git a/rpcs3/Emu/SysCalls/Modules/sysPrxForUser.cpp b/rpcs3/Emu/SysCalls/Modules/sysPrxForUser.cpp
index 86adba31be..57ddfa1626 100644
--- a/rpcs3/Emu/SysCalls/Modules/sysPrxForUser.cpp
+++ b/rpcs3/Emu/SysCalls/Modules/sysPrxForUser.cpp
@@ -302,6 +302,15 @@ s32 _sys_printf(u32 arg1)
 	return CELL_OK;
 }
 
+s32 _unnamed_E75C40F2(u32 dest)
+{
+	sysPrxForUser->Todo("Unnamed function 0xE75C40F2 (dest=0x%x) -> CELL_ENOENT", dest);
+
+	// prx: load some data (0x40 bytes) previously set by sys_process_get_paramsfo
+	//memset(Memory + dest, 0, 0x40);
+	return CELL_ENOENT;
+}
+
 void sysPrxForUser_init()
 {
 	REG_FUNC(sysPrxForUser, sys_initialize_tls);
@@ -380,6 +389,7 @@ void sysPrxForUser_init()
 	REG_FUNC(sysPrxForUser, _sys_strncat);
 	REG_FUNC(sysPrxForUser, _sys_strcpy);
 	REG_FUNC(sysPrxForUser, _sys_strncpy);
+	sysPrxForUser->AddFunc(0xe75c40f2, _unnamed_E75C40F2); // real name is unknown
 
 	spu_printf_agcb = 0;
 	spu_printf_dgcb = 0;
diff --git a/rpcs3/Emu/SysCalls/lv2/sys_spu.cpp b/rpcs3/Emu/SysCalls/lv2/sys_spu.cpp
index 0baa1449d1..7fe220130b 100644
--- a/rpcs3/Emu/SysCalls/lv2/sys_spu.cpp
+++ b/rpcs3/Emu/SysCalls/lv2/sys_spu.cpp
@@ -842,6 +842,7 @@ s32 sys_spu_thread_group_connect_event_all_threads(u32 id, u32 eq_id, u64 req, m
 					eq->ports.add(&(t->SPUPs[i]));
 					t->SPUPs[i].eq = eq;
 				}
+				LOG_NOTICE(HLE, "*** spup -> %d", i);
 				spup = (u8)i;
 			}