diff --git a/src/emu/bus/vcs/vcs_slot.c b/src/emu/bus/vcs/vcs_slot.c
index b3e7f48e6b0..0c3f80bcbb6 100755
--- a/src/emu/bus/vcs/vcs_slot.c
+++ b/src/emu/bus/vcs/vcs_slot.c
@@ -178,127 +178,132 @@ static const char *vcs_get_slot(int type)
 
 bool vcs_cart_slot_device::call_load()
 {
-	UINT8 *ROM;
-	UINT32 len;
-
-	if (software_entry() != NULL)
-		len = get_software_region_length("rom");
-	else
-		len = length();
-
-	//printf("Size: 0x%X\n", len);
-
-	// check that filesize is among the supported ones
-	switch (len)
+	if (m_cart)
 	{
-	case 0x00800:
-	case 0x01000:
-	case 0x02000:
-	case 0x028ff:
-	case 0x02900:
-	case 0x03000:
-	case 0x04000:
-	case 0x08000:
-	case 0x10000:
-	case 0x80000:
-		break;
-
-	default:
-		seterror(IMAGE_ERROR_UNSUPPORTED, "Invalid rom file size" );
-		return IMAGE_INIT_FAIL;
-	}
-
-	m_cart->rom_alloc(len);
-	ROM = m_cart->get_rom_base();
-
-	if (software_entry() != NULL)
-	{
-		const char *pcb_name;
-		memcpy(ROM, get_software_region("rom"), len);
-
-		if ((pcb_name = get_feature("slot")) != NULL)
-			m_type = vcs_get_pcb_id(pcb_name);
+		UINT8 *ROM;
+		UINT32 len;
+		
+		if (software_entry() != NULL)
+			len = get_software_region_length("rom");
+		else
+			len = length();
+		
+		//printf("Size: 0x%X\n", len);
+		
+		// check that filesize is among the supported ones
+		switch (len)
+		{
+			case 0x00800:
+			case 0x01000:
+			case 0x02000:
+			case 0x028ff:
+			case 0x02900:
+			case 0x03000:
+			case 0x04000:
+			case 0x08000:
+			case 0x10000:
+			case 0x80000:
+				break;
+				
+			default:
+				seterror(IMAGE_ERROR_UNSUPPORTED, "Invalid rom file size" );
+				return IMAGE_INIT_FAIL;
+		}
+		
+		m_cart->rom_alloc(len);
+		ROM = m_cart->get_rom_base();
+		
+		if (software_entry() != NULL)
+		{
+			const char *pcb_name;
+			memcpy(ROM, get_software_region("rom"), len);
+			
+			if ((pcb_name = get_feature("slot")) != NULL)
+				m_type = vcs_get_pcb_id(pcb_name);
+			else
+			{
+				// identify type based on size
+				switch (len)
+				{
+					case 0x800:
+						m_type = A26_2K;
+						break;
+					case 0x1000:
+						m_type = A26_4K;
+						break;
+					case 0x2000:
+						m_type = A26_F8;
+						break;
+					case 0x28ff:
+					case 0x2900:
+						m_type = A26_DPC;
+						break;
+					case 0x3000:
+						m_type = A26_FA;
+						break;
+					case 0x4000:
+						m_type = A26_F6;
+						break;
+					case 0x8000:
+						m_type = A26_F4;
+						break;
+					case 0x10000:
+						m_type = A26_32IN1;
+						break;
+					case 0x80000:
+						m_type = A26_3F;
+						break;
+					default:
+						m_type = A26_4K;
+						printf("Unrecognized cart type!\n");
+						break;
+				}
+				
+			}
+		}
 		else
 		{
-			// identify type based on size
-			switch (len)
+			fread(ROM, len);
+			m_type = identify_cart_type(ROM, len);
+		}
+		
+		//printf("Type: %s\n", vcs_get_slot(m_type));
+		
+		// check for Special Chip (128bytes of RAM)
+		if (len == 0x2000 || len == 0x4000 || len == 0x8000)
+			if (detect_super_chip(ROM, len))
 			{
-				case 0x800:
-					m_type = A26_2K;
-					break;
-				case 0x1000:
-					m_type = A26_4K;
-					break;
-				case 0x2000:
-					m_type = A26_F8;
-					break;
-				case 0x28ff:
-				case 0x2900:
-					m_type = A26_DPC;
-					break;
-				case 0x3000:
-					m_type = A26_FA;
-					break;
-				case 0x4000:
-					m_type = A26_F6;
-					break;
-				case 0x8000:
-					m_type = A26_F4;
-					break;
-				case 0x10000:
-					m_type = A26_32IN1;
-					break;
-				case 0x80000:
-					m_type = A26_3F;
-					break;
-				default:
-					m_type = A26_4K;
-					printf("Unrecognized cart type!\n");
-					break;
+				m_cart->ram_alloc(0x80);
+				//printf("Super Chip detected!\n");
 			}
-			
-		}
+		// Super chip games:
+		// dig dig, crystal castles, millipede, stargate, defender ii, jr. Pac Man,
+		// desert falcon, dark chambers, super football, sprintmaster, fatal run,
+		// off the wall, shooting arcade, secret quest, radar lock, save mary, klax
+		
+		// add CBS RAM+ (128bytes of RAM)
+		if (m_type == A26_FA)
+			m_cart->ram_alloc(0x100);
+		// add M Network RAM
+		else if (m_type == A26_E7)
+			m_cart->ram_alloc(0x800);
+		// add Commavid RAM
+		else if (m_type == A26_CV)
+			m_cart->ram_alloc(0x400);
+		// add Starpath Superchager RAM
+		else if (m_type == A26_SS)
+			m_cart->ram_alloc(0x1800);
+		// add Boulder Dash RAM
+		else if (m_type == A26_3E)
+			m_cart->ram_alloc(0x8000);
+		
+		// pass a pointer to the now allocated ROM for the DPC chip
+		if (m_type == A26_DPC)
+			m_cart->setup_addon_ptr((UINT8 *)m_cart->get_rom_base() + 0x2000);
+		
+		return IMAGE_INIT_PASS;
 	}
-	else
-	{
-		fread(ROM, len);
-		m_type = identify_cart_type(ROM, len);
-	}
-
-	//printf("Type: %s\n", vcs_get_slot(m_type));
-
-	// check for Special Chip (128bytes of RAM)
-	if (len == 0x2000 || len == 0x4000 || len == 0x8000)
-		if (detect_super_chip(ROM, len))
-		{
-			m_cart->ram_alloc(0x80);
-			//printf("Super Chip detected!\n");
-		}
-	// Super chip games:
-	// dig dig, crystal castles, millipede, stargate, defender ii, jr. Pac Man,
-	// desert falcon, dark chambers, super football, sprintmaster, fatal run,
-	// off the wall, shooting arcade, secret quest, radar lock, save mary, klax
-
-	// add CBS RAM+ (128bytes of RAM)
-	if (m_type == A26_FA)
-		m_cart->ram_alloc(0x100);
-	// add M Network RAM
-	else if (m_type == A26_E7)
-		m_cart->ram_alloc(0x800);
-	// add Commavid RAM
-	else if (m_type == A26_CV)
-		m_cart->ram_alloc(0x400);
-	// add Starpath Superchager RAM
-	else if (m_type == A26_SS)
-		m_cart->ram_alloc(0x1800);
-	// add Boulder Dash RAM
-	else if (m_type == A26_3E)
-		m_cart->ram_alloc(0x8000);
-
-	// pass a pointer to the now allocated ROM for the DPC chip
-	if (m_type == A26_DPC)
-		m_cart->setup_addon_ptr((UINT8 *)m_cart->get_rom_base() + 0x2000);
-
+	
 	return IMAGE_INIT_PASS;
 }