diff --git a/src/burn/drv/neogeo/d_neogeo.cpp b/src/burn/drv/neogeo/d_neogeo.cpp
index 520d282ae9..fe65fbe04c 100644
--- a/src/burn/drv/neogeo/d_neogeo.cpp
+++ b/src/burn/drv/neogeo/d_neogeo.cpp
@@ -1299,7 +1299,7 @@ static pSekWriteWordHandler pSMABankswitchHandler[MAX_SLOT] = { NULL, };
 void NeoSMABankswitch()
 {
 	SekMapMemory(Neo68KROMActive + nNeo68KROMBank, 0x200000, 0x2FE3FF, MAP_ROM);
-	if (nNeoSMARNGAddress[nNeoActiveSlot][0] != NULL || nNeoSMARNGAddress[nNeoActiveSlot][1] != NULL) {
+	if (nNeoSMARNGAddress[nNeoActiveSlot][0] > 0 || nNeoSMARNGAddress[nNeoActiveSlot][1] > 0) {
 		SekMapMemory(Neo68KROMActive + nNeo68KROMBank + 0x0FE800, 0x2FE800, 0x2FFBFF, MAP_ROM);
 	} else {
 		SekMapMemory(Neo68KROMActive + nNeo68KROMBank + 0x0FE800, 0x2FE800, 0x2FFFFF, MAP_ROM);
diff --git a/src/burn/drv/taito/d_taitomisc.cpp b/src/burn/drv/taito/d_taitomisc.cpp
index 1909cbe4e5..76d8320f6f 100644
--- a/src/burn/drv/taito/d_taitomisc.cpp
+++ b/src/burn/drv/taito/d_taitomisc.cpp
@@ -6044,7 +6044,7 @@ static INT32 TopspeedFrame()
 		nNext = (i + 1) * nTaitoCyclesTotal[nCurrentCPU] / nInterleave;
 		nTaitoCyclesSegment = nNext - nTaitoCyclesDone[nCurrentCPU];
 		nTaitoCyclesDone[nCurrentCPU] += SekRun(nTaitoCyclesSegment);
-		if (i == (nInterleave - 1) && (GetCurrentFrame() != NULL)) SekSetIRQLine(6, CPU_IRQSTATUS_AUTO);
+		if (i == (nInterleave - 1) && (GetCurrentFrame() > 0)) SekSetIRQLine(6, CPU_IRQSTATUS_AUTO);
 		if (i == (nInterleave - 3)) SekSetIRQLine(5, CPU_IRQSTATUS_AUTO);
 		SekClose();
 
@@ -6055,7 +6055,7 @@ static INT32 TopspeedFrame()
 			nNext = (i + 1) * nTaitoCyclesTotal[nCurrentCPU] / nInterleave;
 			nTaitoCyclesSegment = nNext - nTaitoCyclesDone[nCurrentCPU];
 			nTaitoCyclesDone[nCurrentCPU] += SekRun(nTaitoCyclesSegment);
-			if (i == (nInterleave - 1) && (GetCurrentFrame() != NULL)) SekSetIRQLine(6, CPU_IRQSTATUS_AUTO);
+			if (i == (nInterleave - 1) && (GetCurrentFrame() > 0)) SekSetIRQLine(6, CPU_IRQSTATUS_AUTO);
 			if (i == (nInterleave - 3)) SekSetIRQLine(TaitoIrqLine, CPU_IRQSTATUS_AUTO);
 			SekClose();
 		}