diff --git a/parallel-rsp/parallel.cpp b/parallel-rsp/parallel.cpp
index 396361e..1ca7a5b 100644
--- a/parallel-rsp/parallel.cpp
+++ b/parallel-rsp/parallel.cpp
@@ -43,8 +43,6 @@ RSP::CPU cpu;
 #else
 RSP::JIT::CPU cpu;
 #endif
-uint32_t MFC0_count[32];
-uint32_t SP_STATUS_TIMEOUT;
 } // namespace RSP
 
 extern "C"
@@ -86,15 +84,13 @@ extern "C"
 		// Run CPU until we either break or we need to fire an IRQ.
 		RSP::cpu.get_state().pc = *RSP::rsp.SP_PC_REG & 0xfff;
 		RSP::cpu.get_state().instruction_count = 0;
+		RSP::cpu.get_state().did_mfc0 = 0;
 
 #ifdef INTENSE_DEBUG
 		fprintf(stderr, "RUN TASK: %u\n", RSP::cpu.get_state().pc);
 		log_rsp_mem_parallel();
 #endif
 
-		for (auto &count : RSP::MFC0_count)
-			count = 0;
-
 		while (!(*RSP::rsp.SP_STATUS_REG & SP_STATUS_HALT))
 		{
 			auto mode = RSP::cpu.run();
@@ -106,12 +102,6 @@ extern "C"
 
 		*RSP::rsp.SP_PC_REG = (RSP::cpu.get_state().pc & 0xffc);
 
-		// From CXD4.
-		if (*RSP::rsp.SP_STATUS_REG & SP_STATUS_BROKE)
-			return RSP::cpu.get_state().instruction_count * 1.5; // Converting RCP clock rate to CPU clock rate
-		else if (*RSP::cpu.get_state().cp0.irq & 1)
-			RSP::rsp.CheckInterrupts();
-
 		return RSP::cpu.get_state().instruction_count * 1.5; // Converting RCP clock rate to CPU clock rate
 	}
 
@@ -174,9 +164,6 @@ extern "C"
 		*cr[RSP::CP0_REGISTER_SP_STATUS] = SP_STATUS_HALT;
 		RSP::cpu.get_state().cp0.irq = RSP::rsp.MI_INTR_REG;
 
-		// From CXD4.
-		RSP::SP_STATUS_TIMEOUT = 256;
-
 		RSP::cpu.set_dmem(reinterpret_cast<uint32_t *>(Rsp_Info.DMEM));
 		RSP::cpu.set_imem(reinterpret_cast<uint32_t *>(Rsp_Info.IMEM));
 		RSP::cpu.set_rdram(reinterpret_cast<uint32_t *>(Rsp_Info.RDRAM));
diff --git a/parallel-rsp/rsp/cp0.cpp b/parallel-rsp/rsp/cp0.cpp
index 55cdc9a..b3b683a 100644
--- a/parallel-rsp/rsp/cp0.cpp
+++ b/parallel-rsp/rsp/cp0.cpp
@@ -6,8 +6,6 @@
 namespace RSP
 {
 extern RSP_INFO rsp;
-extern uint32_t MFC0_count[32];
-extern uint32_t SP_STATUS_TIMEOUT;
 } // namespace RSP
 #endif
 
@@ -29,20 +27,19 @@ extern "C"
 
 #ifdef PARALLEL_INTEGRATION
 		// WAIT_FOR_CPU_HOST. From CXD4.
-		if (rd == CP0_REGISTER_SP_STATUS)
+		if (rd == CP0_REGISTER_SP_RESERVED)
 		{
-			--rsp->instruction_count; // Some games check the STATUS reg more than normal since we don't really yield properly
-			RSP::MFC0_count[rt] += 1;
-		}
-		else if (rd == CP0_REGISTER_SP_RESERVED)
-		{
-			rsp->instruction_count += 2; // Needed for DK64
-			RSP::MFC0_count[rt] += 1;
+			rsp->instruction_count += 4; // Needed for DK64
 			*rsp->cp0.cr[CP0_REGISTER_SP_RESERVED] = 1;
+			rsp->did_mfc0 = 1;
+			return MODE_EXIT;
 		}
 		// We don't return control to the CPU if the RDP FREEZE bit is set, doing so seems to cause flickering
-		if (RSP::MFC0_count[rt] >= RSP::SP_STATUS_TIMEOUT && (*rsp->cp0.cr[CP0_REGISTER_CMD_STATUS] & DPC_STATUS_FREEZE) == 0)
+		else if (rd == CP0_REGISTER_SP_STATUS && (*rsp->cp0.cr[CP0_REGISTER_CMD_STATUS] & DPC_STATUS_FREEZE) == 0)
+		{
+			rsp->did_mfc0 = 1;
 			return MODE_EXIT;
+		}
 #endif
 
 		//if (rd == 4) // SP_STATUS_REG
diff --git a/parallel-rsp/rsp_jit.cpp b/parallel-rsp/rsp_jit.cpp
index 56af17f..221f5ac 100644
--- a/parallel-rsp/rsp_jit.cpp
+++ b/parallel-rsp/rsp_jit.cpp
@@ -909,7 +909,11 @@ void CPU::jit_instruction(jit_state_t *_jit, uint32_t pc, uint32_t instr,
 
 		auto *vuop = ops[op];
 		if (!vuop)
+		{
+			printf("UNKNOWN RSP VU COMMAND %u\n", op);
+			exit(1);
 			vuop = RSP_RESERVED;
+		}
 
 		regs.flush_caller_save_registers(_jit);
 		jit_begin_call(_jit);
@@ -1731,6 +1735,8 @@ void CPU::jit_instruction(jit_state_t *_jit, uint32_t pc, uint32_t instr,
 	}
 
 	default:
+		printf("UNKNOWN RSP SU COMMAND %o\n", type);
+		exit(1);
 		break;
 	}
 }
@@ -1967,8 +1973,6 @@ ReturnMode CPU::run()
 		{
 		case MODE_BREAK:
 			*state.cp0.cr[CP0_REGISTER_SP_STATUS] |= SP_STATUS_BROKE | SP_STATUS_HALT;
-			if (*state.cp0.cr[CP0_REGISTER_SP_STATUS] & SP_STATUS_INTR_BREAK)
-				*state.cp0.irq |= 1;
 #ifndef PARALLEL_INTEGRATION
 			print_registers();
 #endif
@@ -1980,7 +1984,10 @@ ReturnMode CPU::run()
 			return static_cast<ReturnMode>(ret);
 
 		default:
-			break;
+			if (state.did_mfc0)
+				return static_cast<ReturnMode>(MODE_EXIT);
+			else
+				break;
 		}
 	}
 }
diff --git a/parallel-rsp/state.hpp b/parallel-rsp/state.hpp
index 90de304..9e4ea88 100644
--- a/parallel-rsp/state.hpp
+++ b/parallel-rsp/state.hpp
@@ -144,6 +144,7 @@ struct CPUState
 	uint32_t pc = 0;
 	uint32_t instruction_count = 0;
 	uint32_t last_instruction_type = 0;
+	uint32_t did_mfc0 = 0;
 	uint32_t dirty_blocks = 0;
 	static_assert(CODE_BLOCKS <= 32, "Code blocks must fit in 32-bit register.");