diff --git a/src/emu/cpu/mips/mdrc64.c b/src/emu/cpu/mips/mdrc64.c
index c36bc8e88a7..44d713c547a 100644
--- a/src/emu/cpu/mips/mdrc64.c
+++ b/src/emu/cpu/mips/mdrc64.c
@@ -3034,7 +3034,7 @@ static int compile_set_cop0_reg(drc_core *drc, compiler_state *compiler, const o
 			emit_mov_r32_m32(DRCTOP, REG_EDX, CPR0ADDR(COP0_Status));						// mov  edx,[Status]
 			emit_mov_m32_r32(DRCTOP, CPR0ADDR(COP0_Status), REG_EAX);						// mov  [Status],eax
 			emit_xor_r32_r32(DRCTOP, REG_EDX, REG_EAX);										// xor  edx,eax
-			emit_test_r32_imm(DRCTOP, REG_EDX, 0x8000);										// test edx,0x8000
+			emit_test_r32_imm(DRCTOP, REG_EDX, SR_IMEX5);										// test edx,0x8000
 			emit_jcc_short_link(DRCTOP, COND_Z, &link1);									// jz   skip
 			emit_lea_r64_m64(DRCTOP, REG_P1, COREADDR);										// lea  p1,[mips3.core]
 			emit_call_m64(DRCTOP, MDRC(&mips3.drcdata->mips3com_update_cycle_counting));	// call mips3com_update_cycle_counting
diff --git a/src/emu/cpu/mips/mips3com.c b/src/emu/cpu/mips/mips3com.c
index 1611f17fa74..e061faf5746 100644
--- a/src/emu/cpu/mips/mips3com.c
+++ b/src/emu/cpu/mips/mips3com.c
@@ -174,16 +174,13 @@ offs_t mips3com_dasm(mips3_state *mips, char *buffer, offs_t pc, const UINT8 *op
 void mips3com_update_cycle_counting(mips3_state *mips)
 {
 	/* modify the timer to go off */
-	if ((mips->cpr[0][COP0_Status] & 0x8000) && mips->cpr[0][COP0_Compare] != 0xffffffff)
+	if ((mips->cpr[0][COP0_Status] & SR_IMEX5) && mips->cpr[0][COP0_Compare] != 0xffffffff)
 	{
 		UINT32 count = (activecpu_gettotalcycles64() - mips->count_zero_time) / 2;
 		UINT32 compare = mips->cpr[0][COP0_Compare];
 		UINT32 cyclesleft = compare - count;
 		attotime newtime = ATTOTIME_IN_CYCLES(((INT64)cyclesleft * 2), cpu_getactivecpu());
-
-		/* due to accuracy issues, don't bother setting timers unless they're for less than 100msec */
-		if (attotime_compare(newtime, ATTOTIME_IN_MSEC(100)) < 0)
-			timer_adjust(mips->compare_int_timer, newtime, cpu_getactivecpu(), attotime_zero);
+		timer_adjust(mips->compare_int_timer, newtime, cpu_getactivecpu(), attotime_zero);
 	}
 	else
 		timer_adjust(mips->compare_int_timer, attotime_never, cpu_getactivecpu(), attotime_zero);
diff --git a/src/emu/cpu/mips/mips3drc.c b/src/emu/cpu/mips/mips3drc.c
index aa5a4e93b36..96c0cb11d15 100644
--- a/src/emu/cpu/mips/mips3drc.c
+++ b/src/emu/cpu/mips/mips3drc.c
@@ -233,7 +233,7 @@ static int mips3_execute(int cycles)
 	if (mips3.cache_dirty)
 		drc_cache_reset(mips3.drc);
 	mips3.cache_dirty = FALSE;
-
+	
 	/* execute */
 	mips3.core->icount = cycles;
 	drc_execute(mips3.drc);
diff --git a/src/emu/cpu/rsp/rsp.c b/src/emu/cpu/rsp/rsp.c
index cf414100b30..98ee7337d98 100644
--- a/src/emu/cpu/rsp/rsp.c
+++ b/src/emu/cpu/rsp/rsp.c
@@ -2553,7 +2553,7 @@ static int rsp_execute(int cycles)
 
 	if( rsp.sr & ( RSP_STATUS_HALT | RSP_STATUS_BROKE ) )
 	{
-		rsp_icount = 0;
+		rsp_icount = MIN(rsp_icount, 0);
 	}
 
 	while (rsp_icount > 0)
@@ -2589,7 +2589,7 @@ static int rsp_execute(int cycles)
 					case 0x0d:	/* BREAK */
 					{
 						(config->sp_set_status)(0x3);
-						rsp_icount = 1;
+						rsp_icount = MIN(rsp_icount, 1);
 
 #if LOG_INSTRUCTION_EXECUTION
 						fprintf(exec_output, "\n---------- break ----------\n\n");
@@ -2788,7 +2788,7 @@ static int rsp_execute(int cycles)
 
 		if( rsp.sr & ( RSP_STATUS_HALT | RSP_STATUS_BROKE ) )
 		{
-			rsp_icount = 0;
+			rsp_icount = MIN(rsp_icount, 0);
 		}
 
 	}