diff --git a/support/n64/n64.cpp b/support/n64/n64.cpp
index fb59738..f8635c1 100644
--- a/support/n64/n64.cpp
+++ b/support/n64/n64.cpp
@@ -13,15 +13,15 @@
 
 static constexpr uint64_t FNV_PRIME = 0x100000001b3;
 static constexpr uint64_t FNV_OFFSET_BASIS = 0xcbf29ce484222325;
+static constexpr uint8_t CARTID_LENGTH = 6;
+static constexpr auto CARTID_PREFIX = "ID:";
 
-static constexpr uint64_t fnv_hash(const char *s, uint64_t h = FNV_OFFSET_BASIS)
-{
+static constexpr uint64_t fnv_hash(const char *s, uint64_t h = FNV_OFFSET_BASIS) {
 	if (s) while (uint8_t a = *(s++)) h = (h ^ a) * FNV_PRIME;
 	return h;
 }
 
-enum class MemoryType
-{
+enum class MemoryType {
 	NONE = 0,
 	EEPROM_512,
 	EEPROM_2k,
@@ -30,9 +30,9 @@ enum class MemoryType
 	FLASH_128k
 };
 
-enum class CIC
-{
-	CIC_NUS_6101 = 0,
+enum class CIC {
+	UNKNOWN = -1,
+	CIC_NUS_6101,
 	CIC_NUS_6102,
 	CIC_NUS_7101,
 	CIC_NUS_7102,
@@ -48,90 +48,174 @@ enum class CIC
 	CIC_NUS_DDUS
 };
 
-enum class SystemType
-{
-	NTSC = 0,
+enum class SystemType {
+	UNKNOWN = -1,
+	NTSC,
 	PAL
 };
 
-enum class RomFormat
-{
+enum class RomFormat {
 	UNKNOWN = 0,
 	BIG_ENDIAN,
 	BYTE_SWAPPED,
 	LITTLE_ENDIAN,
 };
 
-enum class AutoDetect
-{
+enum class AutoDetect {
 	ON = 0,
 	OFF = 1,
 };
 
-static RomFormat detectRomFormat(const uint8_t* data)
-{
+static RomFormat detectRomFormat(const uint8_t* data) {
 	// data should be aligned
 	const uint32_t val = *(uint32_t*)data;
 
 	// the following checks assume we're on a little-endian platform
 	// for each check, the first value is for regular roms, the 2nd is for 64DD images
-	if (val == 0x40123780 || val == 0x40072780) return RomFormat::BIG_ENDIAN;
-	if (val == 0x12408037 || val == 0x07408027) return RomFormat::BYTE_SWAPPED;
-	if (val == 0x80371240 || val == 0x80270740) return RomFormat::LITTLE_ENDIAN;
+	// third is a malformed magic word used in homebrew (mostly pointless)
+	if (val == UINT32_C(0x40123780) || val == UINT32_C(0x40072780) || val == UINT32_C(0x41123780)) return RomFormat::BIG_ENDIAN;
+	if (val == UINT32_C(0x12408037) || val == UINT32_C(0x07408027) || val == UINT32_C(0x12418037)) return RomFormat::BYTE_SWAPPED;
+	if (val == UINT32_C(0x80371240) || val == UINT32_C(0x80270740) || val == UINT32_C(0x80371241)) return RomFormat::LITTLE_ENDIAN;
 
 	return RomFormat::UNKNOWN;
 }
 
-static void normalizeData(uint8_t* data, size_t size, RomFormat format)
-{
-	switch(format)
-	{
+static void normalizeData(uint8_t* data, size_t size, RomFormat format) {
+	switch(format) {
 		case RomFormat::BYTE_SWAPPED:
-		for (size_t i = 0; i < size; i += 2)
-		{
-			auto c0 = data[0];
-			auto c1 = data[1];
-			data[0] = c1;
-			data[1] = c0;
-			data += 2;
-		}
-		break;
+			for (size_t i = 0; i < size; i += 2) {
+				auto c0 = data[0];
+				auto c1 = data[1];
+				data[0] = c1;
+				data[1] = c0;
+				data += 2;
+			}
+			break;
 		case RomFormat::LITTLE_ENDIAN:
-		for (size_t i = 0; i < size; i += 4)
-		{
-			auto c0 = data[0];
-			auto c1 = data[1];
-			auto c2 = data[2];
-			auto c3 = data[3];
-			data[0] = c3;
-			data[1] = c2;
-			data[2] = c1;
-			data[3] = c0;
-			data += 4;
-		}
-		break;
+			for (size_t i = 0; i < size; i += 4) {
+				auto c0 = data[0];
+				auto c1 = data[1];
+				auto c2 = data[2];
+				auto c3 = data[3];
+				data[0] = c3;
+				data[1] = c2;
+				data[2] = c1;
+				data[3] = c0;
+				data += 4;
+			}
+			break;
 		default:
-		{
 			// nothing to do
-		}
+			break;
 	}
 }
 
-static void normalizeString(char* s)
-{
+static void normalizeString(char* s) {
 	// change the string to lower-case
 	while (*s) { *s = tolower(*s); ++s; }
 }
 
-static bool detect_rom_settings_in_db(const char* lookup_hash, const char* db_file_name)
-{
+// return true if cic and system region is detected
+static bool parse_and_apply_db_tags(char* tags) {
+	MemoryType save_type = MemoryType::NONE;
+	SystemType system_type = SystemType::UNKNOWN;
+	CIC cic = CIC::UNKNOWN;
+	bool cpak = false;
+	bool rpak = false;
+	bool tpak = false;
+	bool rtc = false;
+
+	const char separator[] = "|";
+
+	for (char* tag = strtok(tags, separator); tag; tag = strtok(nullptr, separator)) {
+		printf("Tag: %s\n", tag);
+
+		normalizeString(tag);
+		switch (fnv_hash(tag)) {
+			case fnv_hash("eeprom512"): save_type = MemoryType::EEPROM_512; break;
+			case fnv_hash("eeprom2k"): save_type = MemoryType::EEPROM_2k; break;
+			case fnv_hash("sram32k"): save_type = MemoryType::SRAM_32k; break;
+			case fnv_hash("sram96k"): save_type = MemoryType::SRAM_96k; break;
+			case fnv_hash("flash128k"): save_type = MemoryType::FLASH_128k; break;
+			case fnv_hash("ntsc"): system_type = SystemType::NTSC; break;
+			case fnv_hash("pal"): system_type = SystemType::PAL; break;
+			case fnv_hash("cpak"): cpak = true; break;
+			case fnv_hash("rpak"): rpak = true; break;
+			case fnv_hash("tpak"): tpak = true; break;
+			case fnv_hash("rtc"): rtc = true; break;
+			case fnv_hash("cic6101"): cic = CIC::CIC_NUS_6101; break;
+			case fnv_hash("cic6102"): cic = CIC::CIC_NUS_6102; break;
+			case fnv_hash("cic6103"): cic = CIC::CIC_NUS_6103; break;
+			case fnv_hash("cic6105"): cic = CIC::CIC_NUS_6105; break;
+			case fnv_hash("cic6106"): cic = CIC::CIC_NUS_6106; break;
+			case fnv_hash("cic7101"): cic = CIC::CIC_NUS_7101; break;
+			case fnv_hash("cic7102"): cic = CIC::CIC_NUS_7102; break;
+			case fnv_hash("cic7103"): cic = CIC::CIC_NUS_7103; break;
+			case fnv_hash("cic7105"): cic = CIC::CIC_NUS_7105; break;
+			case fnv_hash("cic7106"): cic = CIC::CIC_NUS_7106; break;
+			case fnv_hash("cic8303"): cic = CIC::CIC_NUS_8303; break;
+			case fnv_hash("cic8401"): cic = CIC::CIC_NUS_8401; break;
+			case fnv_hash("cic5167"): cic = CIC::CIC_NUS_5167; break;
+			case fnv_hash("cicDDUS"): cic = CIC::CIC_NUS_DDUS; break;
+			default: printf("Unknown tag: %s\n", tag); break;
+		}
+	}
+	printf("System: %d, Save Type: %d, CIC: %d, CPak: %d, RPak: %d, TPak %d, RTC: %d\n", (int)system_type, (int)save_type, (int)cic, cpak, rpak, tpak, rtc);
+
+	const auto auto_detect = (AutoDetect)user_io_status_get("[64]");
+
+	if (auto_detect == AutoDetect::ON) {
+		printf("Auto-detect is on, updating OSD settings\n");
+
+		if (system_type != SystemType::UNKNOWN) user_io_status_set("[80:79]", (uint32_t)system_type);
+		if (cic != CIC::UNKNOWN) user_io_status_set("[68:65]", (uint32_t)cic);
+		user_io_status_set("[71]", (uint32_t)cpak);
+		user_io_status_set("[72]", (uint32_t)rpak);
+		user_io_status_set("[73]", (uint32_t)tpak);
+		user_io_status_set("[74]", (uint32_t)rtc);
+		user_io_status_set("[77:75]", (uint32_t)save_type);
+	}
+	else {
+		printf("Auto-detect is off, not updating OSD settings\n");
+	}
+
+	return (auto_detect != AutoDetect::ON) || (system_type != SystemType::UNKNOWN && cic != CIC::UNKNOWN);
+}
+
+bool md5_matches(const char* line, const char* md5) {
+	for (auto i = 0; i < 32; i++) {
+		if (line[i] == '\0' || md5[i] != tolower(line[i]))
+			return false;
+	}
+
+	return true;
+}
+
+bool cart_id_matches(const char* line, const char* cart_id) {
+	// A valid ID line should start with "ID:"
+	if (strncmp(line, CARTID_PREFIX, strlen(CARTID_PREFIX)) != 0)
+		return false;
+
+	// Skip the line if it doesn't match our cart_id, '_' = don't care
+	auto lp = (char*)line + strlen(CARTID_PREFIX);
+	for (auto i = 0; i < CARTID_LENGTH; i++, lp++) {
+		if (*lp != '_' && *lp != cart_id[i])
+			return false; // character didn't match
+
+		if (*lp == ' ') // early termination
+			return true;
+	}
+
+	return true;
+}
+
+static uint8_t detect_rom_settings_in_db(const char* lookup_hash, const char* db_file_name) {
 	fileTextReader reader = {};
 
 	char file_path[1024];
 	sprintf(file_path, "%s/%s", HomeDir(), db_file_name);
 
-	if (!FileOpenTextReader(&reader, file_path))
-	{
+	if (!FileOpenTextReader(&reader, file_path)) {
 		printf("Failed to open N64 data file %s\n", file_path);
 		return false;
 	}
@@ -139,90 +223,56 @@ static bool detect_rom_settings_in_db(const char* lookup_hash, const char* db_fi
 	char tags[128];
 
 	const char* line;
-	while ((line = FileReadLine(&reader)))
-	{
-		// skip the line if it doesn't start with our hash
-		if (strncmp(lookup_hash, line, 32) != 0)
+	while ((line = FileReadLine(&reader))) {
+		// Skip the line if it doesn't start with our hash
+		if (!md5_matches(line, lookup_hash))
 			continue;
 
-		if (sscanf(line, "%*s %s", tags) != 1)
-		{
-			printf("No tags found.\n");
-			continue;
-		}
-
 		printf("Found ROM entry: %s\n", line);
 
-		MemoryType save_type = MemoryType::NONE;
-		SystemType system_type = SystemType::NTSC;
-		CIC cic = CIC::CIC_NUS_6102;
-		bool cpak = false;
-		bool rpak = false;
-		bool tpak = false;
-		bool rtc = false;
-
-		const char separator[] = "|";
-
-		for (char* tag = strtok(tags, separator); tag; tag = strtok(nullptr, separator))
-		{
-			printf("Tag: %s\n", tag);
-
-			normalizeString(tag);
-			switch (fnv_hash(tag))
-			{
-				case fnv_hash("eeprom512"): save_type = MemoryType::EEPROM_512; break;
-				case fnv_hash("eeprom2k"): save_type = MemoryType::EEPROM_2k; break;
-				case fnv_hash("sram32k"): save_type = MemoryType::SRAM_32k; break;
-				case fnv_hash("sram96k"): save_type = MemoryType::SRAM_96k; break;
-				case fnv_hash("flash128k"): save_type = MemoryType::FLASH_128k; break;
-				case fnv_hash("ntsc"): system_type = SystemType::NTSC; break;
-				case fnv_hash("pal"): system_type = SystemType::PAL; break;
-				case fnv_hash("cpak"): cpak = true; break;
-				case fnv_hash("rpak"): rpak = true; break;
-				case fnv_hash("tpak"): tpak = true; break;
-				case fnv_hash("rtc"): rtc = true; break;
-				case fnv_hash("cic6101"): cic = CIC::CIC_NUS_6101; break;
-				case fnv_hash("cic6102"): cic = CIC::CIC_NUS_6102; break;
-				case fnv_hash("cic6103"): cic = CIC::CIC_NUS_6103; break;
-				case fnv_hash("cic6105"): cic = CIC::CIC_NUS_6105; break;
-				case fnv_hash("cic6106"): cic = CIC::CIC_NUS_6106; break;
-				case fnv_hash("cic7101"): cic = CIC::CIC_NUS_7101; break;
-				case fnv_hash("cic7102"): cic = CIC::CIC_NUS_7102; break;
-				case fnv_hash("cic7103"): cic = CIC::CIC_NUS_7103; break;
-				case fnv_hash("cic7105"): cic = CIC::CIC_NUS_7105; break;
-				case fnv_hash("cic7106"): cic = CIC::CIC_NUS_7106; break;
-				case fnv_hash("cic8303"): cic = CIC::CIC_NUS_8303; break;
-				case fnv_hash("cic8401"): cic = CIC::CIC_NUS_8401; break;
-				case fnv_hash("cic5167"): cic = CIC::CIC_NUS_5167; break;
-				case fnv_hash("cicDDUS"): cic = CIC::CIC_NUS_DDUS; break;
-				default: printf("Unknown tag: %s\n", tag);
-			}
-		}
-		printf("System: %d, Save Type: %d, CIC: %d, CPak: %d, RPak: %d, TPak %d, RTC: %d\n", (int)system_type, (int)save_type, (int)cic, cpak, rpak, tpak, rtc);
-
-		const auto auto_detect = (AutoDetect)user_io_status_get("[64]");
-
-		if (auto_detect == AutoDetect::ON)
-		{
-			printf("Auto-detect is on, updating OSD settings\n");
-
-			user_io_status_set("[80:79]", (uint32_t)system_type);
-			user_io_status_set("[68:65]", (uint32_t)cic);
-			user_io_status_set("[71]", (uint32_t)cpak);
-			user_io_status_set("[72]", (uint32_t)rpak);
-			user_io_status_set("[73]", (uint32_t)tpak);
-			user_io_status_set("[74]", (uint32_t)rtc);
-			user_io_status_set("[77:75]", (uint32_t)save_type);
-		}
-		else
-		{
-			printf("Auto-detect is off, not updating OSD settings\n");
+		if (sscanf(line, "%*s %s", tags) != 1) {
+			printf("No tags found.\n");
+			return 2;
 		}
 
-		return true;
+		// 2 = System region and/or CIC wasn't in DB, will need detection
+		return parse_and_apply_db_tags(tags) ? 3 : 2;
 	}
 
-	return false;
+	return 0;
+}
+
+static uint8_t detect_rom_settings_in_db_with_cartid(const char* cart_id, const char* db_file_name) {
+	fileTextReader reader = {};
+
+	char file_path[1024];
+	sprintf(file_path, "%s/%s", HomeDir(), db_file_name);
+
+	if (!FileOpenTextReader(&reader, file_path)) {
+		printf("Failed to open N64 data file %s\n", file_path);
+		return false;
+	}
+
+	char tags[128];
+
+	const char* line;
+	while ((line = FileReadLine(&reader))) {
+		// Skip the line if it doesn't start with our ID
+		if (!cart_id_matches(line, cart_id))
+			continue;
+
+		printf("Found ROM entry: %s\n", line);
+
+		if (sscanf(line, "%*s %s", tags) != 1) {
+			printf("No tags found.\n");
+			return 2;
+		}
+
+		// 2 = System region and/or CIC wasn't in DB, will need detection
+		return parse_and_apply_db_tags(tags) ? 3 : 2;
+	}
+
+	return 0;
 }
 
 static const char* DB_FILE_NAMES[] =
@@ -231,77 +281,91 @@ static const char* DB_FILE_NAMES[] =
 	"N64-database_user.txt",
 };
 
-static bool detect_rom_settings_in_dbs(const char* lookup_hash)
-{
-	for (const char* db_file_name: DB_FILE_NAMES)
-	{
-		if (detect_rom_settings_in_db(lookup_hash, db_file_name))
-			return true;
+static uint8_t detect_rom_settings_in_dbs_with_md5(const char* lookup) {
+	for (const char* db_file_name : DB_FILE_NAMES) {
+		const auto detected = detect_rom_settings_in_db(lookup, db_file_name);
+		if (detected != 0) return detected;
 	}
-	return false;
+
+	return 0;
 }
 
-static bool detect_rom_settings_from_first_chunk(char region_code, uint64_t crc)
-{
-	SystemType system_type;
+static uint8_t detect_rom_settings_in_dbs_with_cartid(const char* lookup) {
+	if (strlen(lookup) < CARTID_LENGTH)
+		return 0;
+
+	for (auto i = 0; i < CARTID_LENGTH; i++) {
+		if ((lookup[i] >= '0' && lookup[i] <= '9') || (lookup[i] >= 'A' && lookup[i] <= 'Z'))
+			continue;
+
+		return 0;
+	}
+
+	for (const char* db_file_name : DB_FILE_NAMES) {
+		const auto detected = detect_rom_settings_in_db_with_cartid(lookup, db_file_name);
+		if (detected != 0) return detected;
+	}
+	
+	return 0;
+}
+
+static bool detect_rom_settings_from_first_chunk(char region_code, uint64_t crc) {
+	SystemType system_type = SystemType::NTSC;
 	CIC cic;
+	bool is_known_cic = true;
 
-	const auto auto_detect = (AutoDetect)user_io_status_get("[64]");
-
-	if (auto_detect != AutoDetect::ON)
-	{
+	if ((AutoDetect)user_io_status_get("[64]") != AutoDetect::ON) {
 		printf("Auto-detect is off, not updating OSD settings\n");
 		return true;
 	}
 
-	switch (region_code)
-	{
-		case 'D': //Germany
-		case 'F': //France
-		case 'H': //Netherlands (Dutch)
-		case 'I': //Italy
-		case 'L': //Gateway 64
-		case 'P': //Europe
-		case 'S': //Spain
-		case 'U': //Australia
-		case 'W': //Scandinavia
-		case 'X': //Europe
-		case 'Y': //Europe
+	switch (region_code) {
+		case 'D': // Germany
+		case 'F': // France
+		case 'H': // Netherlands (Dutch)
+		case 'I': // Italy
+		case 'L': // Gateway 64
+		case 'P': // Europe
+		case 'S': // Spain
+		case 'U': // Australia
+		case 'W': // Scandinavia
+		case 'X': // Europe
+		case 'Y': // Europe
 			system_type = SystemType::PAL; break;
-		default: 
-			system_type = SystemType::NTSC; break;
 	}
 
 	// the following checks assume we're on a little-endian platform
-	switch (crc)
-	{
+	switch (crc) {
+		default: 
+			printf("Unknown CIC, uses default\n");
+			is_known_cic = false;
+			// fall through
 		case UINT64_C(0x000000a316adc55a): 
 		case UINT64_C(0x000000039c981107): // hcs64's CIC-6102 IPL3 replacement
 		case UINT64_C(0x000000a30dacd530): // Unknown. Used in SM64 hacks
 		case UINT64_C(0x000000d2828281b0): // Unknown. Used in some homebrew
 		case UINT64_C(0x0000009acc31e644): // Unknown. Used in some betas and homebrew. Dev boot code?
-			  cic = system_type == SystemType::NTSC
+			cic = system_type == SystemType::NTSC
 			? CIC::CIC_NUS_6102 
 			: CIC::CIC_NUS_7101; break;
-		case UINT64_C(0x000000a405397b05): cic = CIC::CIC_NUS_7102; system_type = SystemType::PAL; break;
-		case UINT64_C(0x000000a0f26f62fe): cic = CIC::CIC_NUS_6101; system_type = SystemType::NTSC; break;
+		case UINT64_C(0x000000a405397b05): system_type = SystemType::PAL; cic = CIC::CIC_NUS_7102; break;
+		case UINT64_C(0x000000a0f26f62fe): system_type = SystemType::NTSC; cic = CIC::CIC_NUS_6101; break;
 		case UINT64_C(0x000000a9229d7c45): 
-			  cic = system_type == SystemType::NTSC 
+			cic = system_type == SystemType::NTSC
 			? CIC::CIC_NUS_6103 
 			: CIC::CIC_NUS_7103; break;
 		case UINT64_C(0x000000f8b860ed00): 
-			  cic = system_type == SystemType::NTSC 
+			cic = system_type == SystemType::NTSC
 			? CIC::CIC_NUS_6105 
 			: CIC::CIC_NUS_7105; break;
 		case UINT64_C(0x000000ba5ba4b8cd): 
-			  cic = system_type == SystemType::NTSC 
+			cic = system_type == SystemType::NTSC
 			? CIC::CIC_NUS_6106 
 			: CIC::CIC_NUS_7106; break;
 		case UINT64_C(0x0000012daafc8aab): cic = CIC::CIC_NUS_5167; break;
 		case UINT64_C(0x000000a9df4b39e1): cic = CIC::CIC_NUS_8303; break;
 		case UINT64_C(0x000000aa764e39e1): cic = CIC::CIC_NUS_8401; break;
 		case UINT64_C(0x000000abb0b739e1): cic = CIC::CIC_NUS_DDUS; break;
-		default: return false;
 	}
 
 	printf("System: %d, CIC: %d\n", (int)system_type, (int)cic);
@@ -310,22 +374,17 @@ static bool detect_rom_settings_from_first_chunk(char region_code, uint64_t crc)
 	user_io_status_set("[80:79]", (uint32_t)system_type);
 	user_io_status_set("[68:65]", (uint32_t)cic);
 
-	return true;
+	return is_known_cic;
 }
 
-static void md5_to_hex(uint8_t* in, char* out)
-{
-	char *p = out;
-	for (int i = 0; i < 16; i++)
-	{
-		sprintf(p, "%02x", in[i]);
-		p += 2;
+static void md5_to_hex(uint8_t* in, char* out) {
+	for (auto i = 0; i < 16; i++) {
+		sprintf(out, "%02x", in[i]);
+		out += 2;
 	}
-	*p = '\0';
 }
 
-int n64_rom_tx(const char* name, unsigned char index)
-{
+int n64_rom_tx(const char* name, unsigned char index) {
 	static uint8_t buf[4096];
 	fileTYPE f = {};
 
@@ -349,16 +408,20 @@ int n64_rom_tx(const char* name, unsigned char index)
 	process_ss(name);
 
 	bool is_first_chunk = true;
-	bool rom_found_in_db = false;
-	bool cic_detected = false;
-	RomFormat rom_format = RomFormat::UNKNOWN;
+
+	// 0 = Nothing detected
+	// 1 = System region and CIC detected
+	// 2 = Found some ROM info in DB (Save type etc.), but System region and CIC has not been determined
+	// 3 = Has detected everything, System type, CIC, Save type etc.
+	uint8_t rom_settings_detected = 0;
+	RomFormat rom_format;
 
 	MD5Context ctx;
 	MD5Init(&ctx);
 	uint8_t md5[16];
 	char md5_hex[40];
-	uint64_t ipl3_crc = 0;
-	char region_code = '\0';
+	uint64_t bootcode_sum = 0;
+	char cart_id[8];
 
 	while (bytes2send)
 	{
@@ -367,14 +430,15 @@ int n64_rom_tx(const char* name, unsigned char index)
 		FileReadAdv(&f, buf, chunk);
 
 		// perform sanity checks and detect ROM format
-		if (is_first_chunk)
-		{
-			if (chunk < 4096)
-			{
+		if (is_first_chunk) {
+			if (chunk < 4096) {
 				printf("Failed to load ROM: must be at least 4096 bytes\n");
 				return 0;
 			}
+
 			rom_format = detectRomFormat(buf);
+			if (rom_format == RomFormat::UNKNOWN)
+				printf("Unknown ROM format\n");
 		}
 
 		// normalize data to big-endian format
@@ -382,9 +446,8 @@ int n64_rom_tx(const char* name, unsigned char index)
 
 		MD5Update(&ctx, buf, chunk);
 
-		if (is_first_chunk)
-		{
-			// try to detect ROM settings based on header MD5 hash
+		if (is_first_chunk) {
+			// Try to detect ROM settings based on header MD5 hash
 
 			// For calculating the MD5 hash of the header, we need to make a
 			// copy of the context before calling MD5Final, otherwise the file
@@ -395,13 +458,28 @@ int n64_rom_tx(const char* name, unsigned char index)
 			md5_to_hex(md5, md5_hex);
 			printf("Header MD5: %s\n", md5_hex);
 
-			rom_found_in_db = detect_rom_settings_in_dbs(md5_hex);
-			if (!rom_found_in_db)
-			{
+			rom_settings_detected = detect_rom_settings_in_dbs_with_md5(md5_hex);
+			if (rom_settings_detected == 0)
 				printf("No ROM information found for header hash: %s\n", md5_hex);
-				for (size_t i = 0x40 / sizeof(uint32_t); i < 0x1000 / sizeof(uint32_t); i++) ipl3_crc += ((uint32_t*)buf)[i];
-				region_code = buf[0x3e];
+
+			// Calculate boot ROM checksum
+			for (uint32_t i = 0x40 / sizeof(uint32_t); i < 0x1000 / sizeof(uint32_t); i++) {
+				bootcode_sum += ((uint32_t*)buf)[i];
 			}
+
+			/* The first byte (starting at 0x3b) indicates the type of ROM 
+			 *   'N' = cart
+			 *   'D' = 64DD disk
+			 *   'C' = cartridge part of expandable game
+			 *   'E' = 64DD expansion for cart
+			 *   'Z' = Aleck64 cart
+			 * The second and third byte form a 2-letter ID for the game
+			 * The fourth byte indicates the region and language for the game 
+			 * The fifth byte indicates the revision of the game */
+
+			strncpy(cart_id, (char*)(buf + 0x3b), 4);
+			sprintf((char*)(cart_id + 4), "%02X", buf[0x3f]);
+			printf("Cartridge ID: %s\n", cart_id);
 		}
 
 		user_io_file_tx_data(buf, chunk);
@@ -415,38 +493,44 @@ int n64_rom_tx(const char* name, unsigned char index)
 	md5_to_hex(md5, md5_hex);
 	printf("File MD5: %s\n", md5_hex);
 
-	// Try to detect ROM settings from file MD5 if they are not available yet
-	if (!rom_found_in_db)
-	{
-		rom_found_in_db = detect_rom_settings_in_dbs(md5_hex);
-		if (!rom_found_in_db) printf("No ROM information found for file hash: %s\n", md5_hex);
-	}
+	// Try to detect ROM settings from full file MD5 if they're are not detected yet
+	if (rom_settings_detected == 0)
+		rom_settings_detected = detect_rom_settings_in_dbs_with_md5(md5_hex);
 
-	// Try detect (partial) ROM settings by analyzing the ROM itself. (region, cic and save type)
-	// Fallback for missing db entries.
-	if (!rom_found_in_db)
-	{
-		cic_detected = detect_rom_settings_from_first_chunk(region_code, ipl3_crc);
-		if (!cic_detected) printf("Unknown CIC type: %016" PRIX64 "\n", ipl3_crc);
+	// Try to detect ROM settings by cart ID if they're are not detected yet
+	if (rom_settings_detected == 0) {
+		printf("No ROM information found for file hash: %s\n", md5_hex);
+		rom_settings_detected = detect_rom_settings_in_dbs_with_cartid(cart_id);
+		if (rom_settings_detected == 0)
+			printf("No ROM information found for cart ID: %s\n", cart_id);
+		// Try detect (partial) ROM settings by analyzing the ROM itself. (System region and CIC)
+		if ((rom_settings_detected == 0 || rom_settings_detected == 2) &&
+			detect_rom_settings_from_first_chunk(cart_id[3], bootcode_sum)) {
+			rom_settings_detected |= 1;
+		}
+	}
+	// Complement info found in DB with System region and CIC
+	else if (rom_settings_detected == 2 && 
+		detect_rom_settings_from_first_chunk(cart_id[3], bootcode_sum)) {
+		rom_settings_detected = 3;
 	}
 
 	printf("Done.\n");
 	FileClose(&f);
 
-	// mount save state
+	// Mount save state
 	char file_path[1024];
 	FileGenerateSavePath(name, file_path);
 	user_io_file_mount(file_path, 0, 1);
 
-	// signal end of transmission
+	// Signal end of transmission
 	user_io_set_download(0);
 	ProgressMessage(0, 0, 0, 0);
 
-	if (!rom_found_in_db)
-	{
-		if (!cic_detected) Info("auto-detect failed");
-		else Info("use database if save is needed");
-	}
+	if (rom_settings_detected == 0 || rom_settings_detected == 2) 
+		Info("Auto-detect failed:\nUnknown CIC type.");
+	else if (rom_settings_detected == 1) 
+		Info("Auto-detect failed:\nROM missing from database,\nyou might not be able to save.", 5000);
 
 	return 1;
 }