COMMON: Replace MKID_BE by MKTAG

MKID_BE relied on unspecified behavior of the C++ compiler,
and as such was always a bit unsafe. The new MKTAG macro
is slightly less elegant, but does no longer depend on the
behavior of the compiler.
Inspired by FFmpeg, which has an almost identical macro.

76 files changed, 635 insertions, 635 deletions

diff --git a/engines/agi/detection.cpp b/engines/agi/detection.cpp
index 6e9a996756..0a53f0c4f4 100644
--- a/engines/agi/detection.cpp
+++ b/engines/agi/detection.cpp
@@ -218,7 +218,7 @@ bool AgiMetaEngine::createInstance(OSystem *syst, Engine **engine, const ADGameD
 }
 
 SaveStateList AgiMetaEngine::listSaves(const char *target) const {
-	const uint32 AGIflag = MKID_BE('AGI:');
+	const uint32 AGIflag = MKTAG('A','G','I',':');
 	Common::SaveFileManager *saveFileMan = g_system->getSavefileManager();
 	Common::StringArray filenames;
 	char saveDesc[31];
@@ -257,7 +257,7 @@ void AgiMetaEngine::removeSaveState(const char *target, int slot) const {
 }
 
 SaveStateDescriptor AgiMetaEngine::querySaveMetaInfos(const char *target, int slot) const {
-	const uint32 AGIflag = MKID_BE('AGI:');
+	const uint32 AGIflag = MKTAG('A','G','I',':');
 	char fileName[MAXPATHLEN];
 	sprintf(fileName, "%s.%03d", target, slot);
 
diff --git a/engines/agi/preagi_mickey.cpp b/engines/agi/preagi_mickey.cpp
index ea041a93c7..10ca797587 100644
--- a/engines/agi/preagi_mickey.cpp
+++ b/engines/agi/preagi_mickey.cpp
@@ -1003,7 +1003,7 @@ bool Mickey::loadGame() {
 			if (_vm->getSelection(kSelAnyKey) == 0)
 				return false;
 		} else {
-			if (infile->readUint32BE() != MKID_BE('MICK')) {
+			if (infile->readUint32BE() != MKTAG('M','I','C','K')) {
 				warning("Mickey::loadGame wrong save game format");
 				return false;
 			}
@@ -1120,7 +1120,7 @@ void Mickey::saveGame() {
 			if (_vm->getSelection(kSelAnyKey) == 0)
 				return;
 		} else {
-			outfile->writeUint32BE(MKID_BE('MICK'));	// header
+			outfile->writeUint32BE(MKTAG('M','I','C','K'));	// header
 			outfile->writeByte(MSA_SAVEGAME_VERSION);
 
 			outfile->writeByte(_game.iRoom);
diff --git a/engines/agi/preagi_winnie.cpp b/engines/agi/preagi_winnie.cpp
index 643cbd86a9..e97c144872 100644
--- a/engines/agi/preagi_winnie.cpp
+++ b/engines/agi/preagi_winnie.cpp
@@ -1159,7 +1159,7 @@ void Winnie::saveGame() {
 	if (!(outfile = _vm->getSaveFileMan()->openForSaving(szFile)))
 		return;
 
-	outfile->writeUint32BE(MKID_BE('WINN'));	// header
+	outfile->writeUint32BE(MKTAG('W','I','N','N'));	// header
 	outfile->writeByte(WTP_SAVEGAME_VERSION);
 
 	outfile->writeByte(_game.fSound);
@@ -1195,7 +1195,7 @@ void Winnie::loadGame() {
 	if (!(infile = _vm->getSaveFileMan()->openForLoading(szFile)))
 		return;
 
-	if (infile->readUint32BE() == MKID_BE('WINN')) {
+	if (infile->readUint32BE() == MKTAG('W','I','N','N')) {
 		saveVersion = infile->readByte();
 		if (saveVersion != WTP_SAVEGAME_VERSION)
 			warning("Old save game version (%d, current version is %d). Will try and read anyway, but don't be surprised if bad things happen", saveVersion, WTP_SAVEGAME_VERSION);
diff --git a/engines/agi/saveload.cpp b/engines/agi/saveload.cpp
index 94df063609..9194cc642c 100644
--- a/engines/agi/saveload.cpp
+++ b/engines/agi/saveload.cpp
@@ -53,7 +53,7 @@
 
 namespace Agi {
 
-static const uint32 AGIflag = MKID_BE('AGI:');
+static const uint32 AGIflag = MKTAG('A','G','I',':');
 
 int AgiEngine::saveGame(const char *fileName, const char *description) {
 	char gameIDstring[8] = "gameIDX";
diff --git a/engines/agos/animation.cpp b/engines/agos/animation.cpp
index 10d3d7f1ff..acdc0084c4 100644
--- a/engines/agos/animation.cpp
+++ b/engines/agos/animation.cpp
@@ -301,7 +301,7 @@ void MoviePlayerDXA::stopVideo() {
 void MoviePlayerDXA::startSound() {
 	uint32 offset, size;
 
-	if (getSoundTag() == MKID_BE('WAVE')) {
+	if (getSoundTag() == MKTAG('W','A','V','E')) {
 		size = _fileStream->readUint32BE();
 
 		if (_sequenceNum) {
diff --git a/engines/cine/saveload.h b/engines/cine/saveload.h
index a6e0e3f1ab..f88338ed82 100644
--- a/engines/cine/saveload.h
+++ b/engines/cine/saveload.h
@@ -71,14 +71,14 @@ enum CineSaveGameFormat {
 };
 
 /** Identifier for the temporary Operation Stealth savegame format. */
-static const uint32 TEMP_OS_FORMAT_ID = MKID_BE('TEMP');
+static const uint32 TEMP_OS_FORMAT_ID = MKTAG('T','E','M','P');
 
 /** The current version number of Operation Stealth's savegame format. */
 static const uint32 CURRENT_OS_SAVE_VER = 1;
 
 /** Chunk header used by the temporary Operation Stealth savegame format. */
 struct ChunkHeader {
-	uint32 id;      ///< Identifier (e.g. MKID_BE('TEMP'))
+	uint32 id;      ///< Identifier (e.g. MKTAG('T','E','M','P'))
 	uint32 version; ///< Version number
 	uint32 size;    ///< Size of the chunk after this header in bytes
 };
diff --git a/engines/gob/save/savefile.h b/engines/gob/save/savefile.h
index eeee03847a..22eb79f4bf 100644
--- a/engines/gob/save/savefile.h
+++ b/engines/gob/save/savefile.h
@@ -48,8 +48,8 @@ class SaveHeader {
 public:
 	/** The size of the header. */
 	static const int kSize = 20;
-	static const uint32 kID1 = MKID_BE('\0SCV');
-	static const uint32 kID2 = MKID_BE('MGOB');
+	static const uint32 kID1 = MKTAG(0,'S','C','V');
+	static const uint32 kID2 = MKTAG('M','G','O','B');
 
 	SaveHeader(uint32 type = 0, uint32 version = 0, uint32 size = 0);
 
@@ -106,7 +106,7 @@ protected:
 class SavePartMem : public SavePart {
 public:
 	static const uint32 kVersion = 1;
-	static const uint32 kID = MKID_BE('PMEM');
+	static const uint32 kID = MKTAG('P','M','E','M');
 
 	SavePartMem(uint32 size);
 	~SavePartMem();
@@ -128,7 +128,7 @@ private:
 class SavePartVars : public SavePart {
 public:
 	static const uint32 kVersion = 1;
-	static const uint32 kID = MKID_BE('VARS');
+	static const uint32 kID = MKTAG('V','A','R','S');
 
 	SavePartVars(GobEngine *vm, uint32 size);
 	~SavePartVars();
@@ -155,7 +155,7 @@ private:
 class SavePartSprite : public SavePart {
 public:
 	static const uint32 kVersion = 2;
-	static const uint32 kID = MKID_BE('SPRT');
+	static const uint32 kID = MKTAG('S','P','R','T');
 
 	SavePartSprite(uint32 width, uint32 height, bool trueColor = false);
 	~SavePartSprite();
@@ -193,7 +193,7 @@ private:
 class SavePartInfo : public SavePart {
 public:
 	static const uint32 kVersion = 1;
-	static const uint32 kID = MKID_BE('INFO');
+	static const uint32 kID = MKTAG('I','N','F','O');
 
 	/**
 	 * The constructor.
@@ -235,7 +235,7 @@ private:
 class SaveContainer {
 public:
 	static const uint32 kVersion = 1;
-	static const uint32 kID = MKID_BE('CONT');
+	static const uint32 kID = MKTAG('C','O','N','T');
 
 	/**
 	 * The constructor.
diff --git a/engines/groovie/cursor.cpp b/engines/groovie/cursor.cpp
index 6a87af8daf..db4134ccb0 100644
--- a/engines/groovie/cursor.cpp
+++ b/engines/groovie/cursor.cpp
@@ -404,7 +404,7 @@ GrvCursorMan_v2::GrvCursorMan_v2(OSystem *system) :
 	// Verify the signature
 	uint32 tmp32 = iconsFile.readUint32BE();
 	uint16 tmp16 = iconsFile.readUint16LE();
-	if (tmp32 != MKID_BE('icon') || tmp16 != 1)
+	if (tmp32 != MKTAG('i','c','o','n') || tmp16 != 1)
 		error("Groovie::Cursor: icons.ph signature failed: %s %d", tag2str(tmp32), tmp16);
 
 
diff --git a/engines/groovie/music.cpp b/engines/groovie/music.cpp
index 7529f95bcf..45f9800211 100644
--- a/engines/groovie/music.cpp
+++ b/engines/groovie/music.cpp
@@ -684,7 +684,7 @@ bool MusicPlayerMac::load(uint32 fileref, bool loop) {
 	debugC(1, kGroovieDebugMIDI | kGroovieDebugAll, "Groovie::Music: Starting the playback of song: %04X", fileref);
 
 	// First try for compressed MIDI
-	Common::SeekableReadStream *file = _vm->_macResFork->getResource(MKID_BE('cmid'), fileref & 0x3FF);
+	Common::SeekableReadStream *file = _vm->_macResFork->getResource(MKTAG('c','m','i','d'), fileref & 0x3FF);
 
 	if (file) {
 		// Found the resource, decompress it
@@ -693,7 +693,7 @@ bool MusicPlayerMac::load(uint32 fileref, bool loop) {
 		file = tmp;
 	} else {
 		// Otherwise, it's uncompressed
-		file = _vm->_macResFork->getResource(MKID_BE('Midi'), fileref & 0x3FF);
+		file = _vm->_macResFork->getResource(MKTAG('M','i','d','i'), fileref & 0x3FF);
 		if (!file)
 			error("Groovie::Music: Couldn't find resource 0x%04X", fileref);
 	}
diff --git a/engines/kyra/resource_intern.cpp b/engines/kyra/resource_intern.cpp
index f26cb8fb26..1dc084f14d 100644
--- a/engines/kyra/resource_intern.cpp
+++ b/engines/kyra/resource_intern.cpp
@@ -356,7 +356,7 @@ Common::Archive *ResLoaderPak::load(Common::ArchiveMemberPtr memberFile, Common:
 
 		const uint32 magic = stream.readUint32BE();
 
-		if (magic != MKID_BE('SCVM'))
+		if (magic != MKTAG('S','C','V','M'))
 			error("LINKLIST file does not contain 'SCVM' header");
 
 		const uint32 links = stream.readUint32BE();
diff --git a/engines/kyra/saveload.cpp b/engines/kyra/saveload.cpp
index cd5ef52b92..44579c3377 100644
--- a/engines/kyra/saveload.cpp
+++ b/engines/kyra/saveload.cpp
@@ -47,13 +47,13 @@ KyraEngine_v1::kReadSaveHeaderError KyraEngine_v1::readSaveHeader(Common::Seekab
 	header.flags = 0;
 	header.thumbnail = 0;
 
-	if (type == MKID_BE('KYRA') || type == MKID_BE('ARYK')) { // old Kyra1 header ID
+	if (type == MKTAG('K','Y','R','A') || type == MKTAG('A','R','Y','K')) { // old Kyra1 header ID
 		header.gameID = GI_KYRA1;
 		header.oldHeader = true;
-	} else if (type == MKID_BE('HOFS')) { // old Kyra2 header ID
+	} else if (type == MKTAG('H','O','F','S')) { // old Kyra2 header ID
 		header.gameID = GI_KYRA2;
 		header.oldHeader = true;
-	} else if (type == MKID_BE('WWSV')) {
+	} else if (type == MKTAG('W','W','S','V')) {
 		header.gameID = in->readByte();
 	} else {
 		// try checking for original save header
@@ -71,12 +71,12 @@ KyraEngine_v1::kReadSaveHeaderError KyraEngine_v1::readSaveHeader(Common::Seekab
 
 			type = in->readUint32BE();
 			header.version = in->readUint16LE();
-			if (type == MKID_BE('MBL3') && header.version == 100) {
+			if (type == MKTAG('M','B','L','3') && header.version == 100) {
 				saveOk = true;
 				header.description = descriptionBuffer;
 				header.gameID = GI_KYRA2;
 				break;
-			} else if (type == MKID_BE('MBL4') && header.version == 102) {
+			} else if (type == MKTAG('M','B','L','4') && header.version == 102) {
 				saveOk = true;
 				header.description = descriptionBuffer;
 				header.gameID = GI_KYRA3;
@@ -94,7 +94,7 @@ KyraEngine_v1::kReadSaveHeaderError KyraEngine_v1::readSaveHeader(Common::Seekab
 	}
 
 	header.version = in->readUint32BE();
-	if (header.version > CURRENT_SAVE_VERSION || (header.oldHeader && header.version > 8) || (type == MKID_BE('ARYK') && header.version > 3))
+	if (header.version > CURRENT_SAVE_VERSION || (header.oldHeader && header.version > 8) || (type == MKTAG('A','R','Y','K') && header.version > 3))
 		return kRSHEInvalidVersion;
 
 	// Versions prior to 9 are using a fixed length description field
@@ -190,7 +190,7 @@ Common::WriteStream *KyraEngine_v1::openSaveForWriting(const char *filename, con
 	}
 
 	// Savegame version
-	out->writeUint32BE(MKID_BE('WWSV'));
+	out->writeUint32BE(MKTAG('W','W','S','V'));
 	out->writeByte(_flags.gameID);
 	out->writeUint32BE(CURRENT_SAVE_VERSION);
 	out->write(saveName, strlen(saveName)+1);
diff --git a/engines/kyra/script.cpp b/engines/kyra/script.cpp
index 0343cbfeae..956bf39b5a 100644
--- a/engines/kyra/script.cpp
+++ b/engines/kyra/script.cpp
@@ -68,14 +68,14 @@ EMCInterpreter::EMCInterpreter(KyraEngine_v1 *vm) : _vm(vm), _scriptData(0), _fi
 
 bool EMCInterpreter::callback(Common::IFFChunk &chunk) {
 	switch (chunk._type) {
-	case MKID_BE('TEXT'):
+	case MKTAG('T','E','X','T'):
 		_scriptData->text = new byte[chunk._size];
 		assert(_scriptData->text);
 		if (chunk._stream->read(_scriptData->text, chunk._size) != chunk._size)
 			error("Couldn't read TEXT chunk from file '%s'", _filename);
 		break;
 
-	case MKID_BE('ORDR'):
+	case MKTAG('O','R','D','R'):
 		_scriptData->ordr = new uint16[chunk._size >> 1];
 		assert(_scriptData->ordr);
 		if (chunk._stream->read(_scriptData->ordr, chunk._size) != chunk._size)
@@ -85,7 +85,7 @@ bool EMCInterpreter::callback(Common::IFFChunk &chunk) {
 			_scriptData->ordr[i] = READ_BE_UINT16(&_scriptData->ordr[i]);
 		break;
 
-	case MKID_BE('DATA'):
+	case MKTAG('D','A','T','A'):
 		_scriptData->data = new uint16[chunk._size >> 1];
 		assert(_scriptData->data);
 		if (chunk._stream->read(_scriptData->data, chunk._size) != chunk._size)
diff --git a/engines/kyra/script.h b/engines/kyra/script.h
index 68620829bb..faa80a3f21 100644
--- a/engines/kyra/script.h
+++ b/engines/kyra/script.h
@@ -84,9 +84,9 @@ public:
 		// Both lead to some problems in our IFF parser, either reading after the end
 		// of file or producing a "Chunk overread" error message. To work around this
 		// we need to adjust the size field properly.
-		if (_formType == MKID_BE('EMC2'))
+		if (_formType == MKTAG('E','M','C','2'))
 			_formChunk.size -= 8;
-		else if (_formType == MKID_BE('AVFS'))
+		else if (_formType == MKTAG('A','V','F','S'))
 			_formChunk.size += 4;
 	}
 };
diff --git a/engines/kyra/script_tim.cpp b/engines/kyra/script_tim.cpp
index 28f18a1f79..1e978caf15 100644
--- a/engines/kyra/script_tim.cpp
+++ b/engines/kyra/script_tim.cpp
@@ -115,14 +115,14 @@ TIMInterpreter::~TIMInterpreter() {
 
 bool TIMInterpreter::callback(Common::IFFChunk &chunk) {
 	switch (chunk._type) {
-	case MKID_BE('TEXT'):
+	case MKTAG('T','E','X','T'):
 		_tim->text = new byte[chunk._size];
 		assert(_tim->text);
 		if (chunk._stream->read(_tim->text, chunk._size) != chunk._size)
 			error("Couldn't read TEXT chunk from file '%s'", _filename);
 		break;
 
-	case MKID_BE('AVTL'):
+	case MKTAG('A','V','T','L'):
 		_avtlChunkSize = chunk._size >> 1;
 		_tim->avtl = new uint16[_avtlChunkSize];
 		assert(_tim->avtl);
diff --git a/engines/kyra/vqa.cpp b/engines/kyra/vqa.cpp
index 382ec2429d..b3371793de 100644
--- a/engines/kyra/vqa.cpp
+++ b/engines/kyra/vqa.cpp
@@ -204,7 +204,7 @@ bool VQAMovie::open(const char *filename) {
 	if (!_file)
 		return false;
 
-	if (_file->readUint32BE() != MKID_BE('FORM')) {
+	if (_file->readUint32BE() != MKTAG('F','O','R','M')) {
 		warning("VQAMovie::open: Cannot find `FORM' tag");
 		return false;
 	}
@@ -212,7 +212,7 @@ bool VQAMovie::open(const char *filename) {
 	// For now, we ignore the size of the FORM chunk.
 	_file->readUint32BE();
 
-	if (_file->readUint32BE() != MKID_BE('WVQA')) {
+	if (_file->readUint32BE() != MKTAG('W','V','Q','A')) {
 		warning("WQAMovie::open: Cannot find `WVQA' tag");
 		return false;
 	}
@@ -228,7 +228,7 @@ bool VQAMovie::open(const char *filename) {
 		uint32 size = _file->readUint32BE();
 
 		switch (tag) {
-		case MKID_BE('VQHD'):	// VQA header
+		case MKTAG('V','Q','H','D'):	// VQA header
 			_header.version     = _file->readUint16LE();
 			_header.flags       = _file->readUint16LE();
 			_header.numFrames   = _file->readUint16LE();
@@ -304,7 +304,7 @@ bool VQAMovie::open(const char *filename) {
 			foundHeader = true;
 			break;
 
-		case MKID_BE('FINF'):	// Frame info
+		case MKTAG('F','I','N','F'):	// Frame info
 			if (!foundHeader) {
 				warning("VQAMovie::open: Found `FINF' before `VQHD'");
 				return false;
@@ -343,7 +343,7 @@ bool VQAMovie::open(const char *filename) {
 					if (_file->eos())
 						break;
 
-					if (scanTag == MKID_BE('VQFR')) {
+					if (scanTag == MKTAG('V','Q','F','R')) {
 						_frameInfo[0] = (_file->pos() - 8) | 0x80000000;
 						break;
 					}
@@ -421,7 +421,7 @@ void VQAMovie::displayFrame(uint frameNum) {
 		int32 end;
 
 		switch (tag) {
-		case MKID_BE('SND0'):	// Uncompressed sound
+		case MKTAG('S','N','D','0'):	// Uncompressed sound
 			foundSound = true;
 			inbuf = (byte *)malloc(size);
 			_file->read(inbuf, size);
@@ -429,7 +429,7 @@ void VQAMovie::displayFrame(uint frameNum) {
 			_stream->queueBuffer(inbuf, size, DisposeAfterUse::YES, Audio::FLAG_UNSIGNED);
 			break;
 
-		case MKID_BE('SND1'):	// Compressed sound, almost like AUD
+		case MKTAG('S','N','D','1'):	// Compressed sound, almost like AUD
 			foundSound = true;
 			outsize = _file->readUint16LE();
 			insize = _file->readUint16LE();
@@ -449,13 +449,13 @@ void VQAMovie::displayFrame(uint frameNum) {
 			}
 			break;
 
-		case MKID_BE('SND2'):	// Compressed sound
+		case MKTAG('S','N','D','2'):	// Compressed sound
 			foundSound = true;
 			warning("VQAMovie::displayFrame: `SND2' is not implemented");
 			_file->seek(size, SEEK_CUR);
 			break;
 
-		case MKID_BE('VQFR'):
+		case MKTAG('V','Q','F','R'):
 			foundFrame = true;
 			end = _file->pos() + size - 8;
 
@@ -464,49 +464,49 @@ void VQAMovie::displayFrame(uint frameNum) {
 				size = _file->readUint32BE();
 
 				switch (tag) {
-				case MKID_BE('CBF0'):	// Full codebook
+				case MKTAG('C','B','F','0'):	// Full codebook
 					_file->read(_codeBook, size);
 					break;
 
-				case MKID_BE('CBFZ'):	// Full codebook
+				case MKTAG('C','B','F','Z'):	// Full codebook
 					inbuf = (byte *)allocBuffer(0, size);
 					_file->read(inbuf, size);
 					Screen::decodeFrame4(inbuf, _codeBook, _codeBookSize);
 					break;
 
-				case MKID_BE('CBP0'):	// Partial codebook
+				case MKTAG('C','B','P','0'):	// Partial codebook
 					_compressedCodeBook = false;
 					_file->read(_partialCodeBook + _partialCodeBookSize, size);
 					_partialCodeBookSize += size;
 					_numPartialCodeBooks++;
 					break;
 
-				case MKID_BE('CBPZ'):	// Partial codebook
+				case MKTAG('C','B','P','Z'):	// Partial codebook
 					_compressedCodeBook = true;
 					_file->read(_partialCodeBook + _partialCodeBookSize, size);
 					_partialCodeBookSize += size;
 					_numPartialCodeBooks++;
 					break;
 
-				case MKID_BE('CPL0'):	// Palette
+				case MKTAG('C','P','L','0'):	// Palette
 					assert(size <= 3 * 256);
 					_file->read(_screen->getPalette(0).getData(), size);
 					break;
 
-				case MKID_BE('CPLZ'):	// Palette
+				case MKTAG('C','P','L','Z'):	// Palette
 					inbuf = (byte *)allocBuffer(0, size);
 					_file->read(inbuf, size);
 					Screen::decodeFrame4(inbuf, _screen->getPalette(0).getData(), 768);
 					break;
 
-				case MKID_BE('VPT0'):	// Frame data
+				case MKTAG('V','P','T','0'):	// Frame data
 					assert(size / 2 <= _numVectorPointers);
 
 					for (i = 0; i < size / 2; i++)
 						_vectorPointers[i] = _file->readUint16LE();
 					break;
 
-				case MKID_BE('VPTZ'):	// Frame data
+				case MKTAG('V','P','T','Z'):	// Frame data
 					inbuf = (byte *)allocBuffer(0, size);
 					outbuf = (byte *)allocBuffer(1, 2 * _numVectorPointers);
 
@@ -613,13 +613,13 @@ void VQAMovie::play() {
 			}
 
 			switch (tag) {
-			case MKID_BE('SND0'):	// Uncompressed sound
+			case MKTAG('S','N','D','0'):	// Uncompressed sound
 				inbuf = (byte *)malloc(size);
 				_file->read(inbuf, size);
 				_stream->queueBuffer(inbuf, size, DisposeAfterUse::YES, Audio::FLAG_UNSIGNED);
 				break;
 
-			case MKID_BE('SND1'):	// Compressed sound
+			case MKTAG('S','N','D','1'):	// Compressed sound
 				outsize = _file->readUint16LE();
 				insize = _file->readUint16LE();
 
@@ -636,12 +636,12 @@ void VQAMovie::play() {
 				}
 				break;
 
-			case MKID_BE('SND2'):	// Compressed sound
+			case MKTAG('S','N','D','2'):	// Compressed sound
 				warning("VQAMovie::play: `SND2' is not implemented");
 				_file->seek(size, SEEK_CUR);
 				break;
 
-			case MKID_BE('CMDS'):	// Unused tag, always empty in kyra3
+			case MKTAG('C','M','D','S'):	// Unused tag, always empty in kyra3
 				_file->seek(size, SEEK_CUR);
 				break;
 
diff --git a/engines/m4/assets.h b/engines/m4/assets.h
index 3ae7fb2e22..940646b5f2 100644
--- a/engines/m4/assets.h
+++ b/engines/m4/assets.h
@@ -33,16 +33,16 @@
 namespace M4 {
 
 // Sequence chunks
-#define CHUNK_SCEN MKID_BE('SCEN')
-#define CHUNK_MACH MKID_BE('MACH')
-#define CHUNK_SEQU MKID_BE('SEQU')
-#define CHUNK_DATA MKID_BE('DATA')
-#define CHUNK_CELS MKID_BE('CELS')
+#define CHUNK_SCEN MKTAG('S','C','E','N')
+#define CHUNK_MACH MKTAG('M','A','C','H')
+#define CHUNK_SEQU MKTAG('S','E','Q','U')
+#define CHUNK_DATA MKTAG('D','A','T','A')
+#define CHUNK_CELS MKTAG('C','E','L','S')
 
 // Sprite chunks
-#define HEAD_M4SS MKID_BE('M4SS')	//'M4SS'
-#define CELS__PAL MKID_BE(' PAL')	//' PAL'
-#define CELS___SS MKID_BE('  SS')	//'  SS'
+#define HEAD_M4SS MKTAG('M','4','S','S')	//'M4SS'
+#define CELS__PAL MKTAG(' ','P','A','L')	//' PAL'
+#define CELS___SS MKTAG(' ',' ','S','S')	//'  SS'
 
 #define SPRITE_SET_CHAR_INFO 4
 
diff --git a/engines/m4/converse.cpp b/engines/m4/converse.cpp
index 70c30d28f2..2d1b8e7e4f 100644
--- a/engines/m4/converse.cpp
+++ b/engines/m4/converse.cpp
@@ -45,35 +45,35 @@ namespace M4 {
 
 // Conversation chunks
 // Header
-#define  HEAD_CONV MKID_BE('CONV')		// conversation
-#define CHUNK_DECL MKID_BE('DECL')		// declaration
-#define CHUNK_NODE MKID_BE('NODE')		// node
-#define CHUNK_LNOD MKID_BE('LNOD')		// linear node
-#define CHUNK_ETRY MKID_BE('ETRY')		// entry
-#define CHUNK_TEXT MKID_BE('TEXT')		// text
-#define CHUNK_MESG MKID_BE('MESG')		// message
+#define  HEAD_CONV MKTAG('C','O','N','V')		// conversation
+#define CHUNK_DECL MKTAG('D','E','C','L')		// declaration
+#define CHUNK_NODE MKTAG('N','O','D','E')		// node
+#define CHUNK_LNOD MKTAG('L','N','O','D')		// linear node
+#define CHUNK_ETRY MKTAG('E','T','R','Y')		// entry
+#define CHUNK_TEXT MKTAG('T','E','X','T')		// text
+#define CHUNK_MESG MKTAG('M','E','S','G')		// message
 // Conversation chunks - entry related (unconditional)
-#define CHUNK_RPLY MKID_BE('RPLY')		// reply
-#define CHUNK_HIDE MKID_BE('HIDE')		// hide entry
-#define CHUNK_UHID MKID_BE('UHID')		// unhide entry
-#define CHUNK_DSTR MKID_BE('DSTR')		// destroy entry
+#define CHUNK_RPLY MKTAG('R','P','L','Y')		// reply
+#define CHUNK_HIDE MKTAG('H','I','D','E')		// hide entry
+#define CHUNK_UHID MKTAG('U','H','I','D')		// unhide entry
+#define CHUNK_DSTR MKTAG('D','S','T','R')		// destroy entry
 // Conversation chunks - entry related (conditional)
-#define CHUNK_CRPL MKID_BE('CRPL')		// reply
-#define CHUNK_CHDE MKID_BE('CHDE')		// hide entry
-#define CHUNK_CUHD MKID_BE('CUHD')		// unhide entry
-#define CHUNK_CDST MKID_BE('DDTS')		// destroy entry
+#define CHUNK_CRPL MKTAG('C','R','P','L')		// reply
+#define CHUNK_CHDE MKTAG('C','H','D','E')		// hide entry
+#define CHUNK_CUHD MKTAG('C','U','H','D')		// unhide entry
+#define CHUNK_CDST MKTAG('D','D','T','S')		// destroy entry
 // Conversation chunks - branching and logic (unconditional)
-#define CHUNK_ASGN MKID_BE('ASGN')		// assign
-#define CHUNK_GOTO MKID_BE('GOTO')		// goto chunk
-#define CHUNK_EXIT MKID_BE('EXIT')		// exit/return from goto
+#define CHUNK_ASGN MKTAG('A','S','G','N')		// assign
+#define CHUNK_GOTO MKTAG('G','O','T','O')		// goto chunk
+#define CHUNK_EXIT MKTAG('E','X','I','T')		// exit/return from goto
 // Conversation chunks - branching and logic (conditional)
-#define CHUNK_CASN MKID_BE('CASN')		// assign
-#define CHUNK_CCGO MKID_BE('CCGO')		// goto chunk
-#define CHUNK_CEGO MKID_BE('CEGO')		// exit/return from goto
+#define CHUNK_CASN MKTAG('C','A','S','N')		// assign
+#define CHUNK_CCGO MKTAG('C','C','G','O')		// goto chunk
+#define CHUNK_CEGO MKTAG('C','E','G','O')		// exit/return from goto
 // Others
-#define CHUNK_FALL MKID_BE('FALL')		// fallthrough
-#define CHUNK_WRPL MKID_BE('WRPL')		// weighted reply chunk
-#define CHUNK_WPRL MKID_BE('WPRL')		// weighted preply chunk
+#define CHUNK_FALL MKTAG('F','A','L','L')		// fallthrough
+#define CHUNK_WRPL MKTAG('W','R','P','L')		// weighted reply chunk
+#define CHUNK_WPRL MKTAG('W','P','R','L')		// weighted preply chunk
 
 
 ConversationView::ConversationView(MadsM4Engine *vm): View(vm, Common::Rect(0,
diff --git a/engines/m4/font.cpp b/engines/m4/font.cpp
index cba32c2225..3ed419675d 100644
--- a/engines/m4/font.cpp
+++ b/engines/m4/font.cpp
@@ -81,7 +81,7 @@ Font::Font(MadsM4Engine *vm, const char *filename) : _vm(vm) {
 void Font::setFontM4(const char *filename) {
 	Common::SeekableReadStream *fontFile = _vm->res()->openFile(filename);
 
-	if (fontFile->readUint32LE() != MKID_BE('FONT')) {
+	if (fontFile->readUint32LE() != MKTAG('F','O','N','T')) {
 		debugCN(kDebugGraphics, "Font::Font: FONT tag expected\n");
 		return;
 	}
@@ -92,7 +92,7 @@ void Font::setFontM4(const char *filename) {
 
 	//debugCN(kDebugGraphics, "Font::Font: _maxWidth = %d, _maxHeight = %d, fontSize = %d\n", _maxWidth, _maxHeight, fontSize);
 
-	if (fontFile->readUint32LE() != MKID_BE('WIDT')) {
+	if (fontFile->readUint32LE() != MKTAG('W','I','D','T')) {
 		debugCN(kDebugGraphics, "Font::Font: WIDT tag expected\n");
 		return;
 	}
@@ -100,7 +100,7 @@ void Font::setFontM4(const char *filename) {
 	_charWidths = new uint8[256];
 	fontFile->read(_charWidths, 256);
 
-	if (fontFile->readUint32LE() != MKID_BE('OFFS')) {
+	if (fontFile->readUint32LE() != MKTAG('O','F','F','S')) {
 		debugCN(kDebugGraphics, "Font::Font: OFFS tag expected\n");
 		return;
 	}
@@ -110,7 +110,7 @@ void Font::setFontM4(const char *filename) {
 	for (int i = 0; i < 256; i++)
 		_charOffs[i] = fontFile->readUint16LE();
 
-	if (fontFile->readUint32LE() != MKID_BE('PIXS')) {
+	if (fontFile->readUint32LE() != MKTAG('P','I','X','S')) {
 		debugCN(kDebugGraphics, "Font::Font: PIXS tag expected\n");
 		return;
 	}
diff --git a/engines/made/database.cpp b/engines/made/database.cpp
index 2aa378edf5..8d06aa0085 100644
--- a/engines/made/database.cpp
+++ b/engines/made/database.cpp
@@ -659,7 +659,7 @@ bool GameDatabaseV3::getSavegameDescription(const char *filename, Common::String
 	}
 
 	uint32 header = in->readUint32BE();
-	if (header != MKID_BE('SGAM')) {
+	if (header != MKTAG('S','G','A','M')) {
 		warning("Save game header missing");
 		delete in;
 		return false;
@@ -696,7 +696,7 @@ int16 GameDatabaseV3::savegame(const char *filename, const char *description, in
 		return 6;
 	}
 	strncpy(desc, description, 64);
-	out->writeUint32BE(MKID_BE('SGAM'));
+	out->writeUint32BE(MKTAG('S','G','A','M'));
 	out->writeUint32LE(size);
 	out->writeUint16LE(version);
 	out->write(desc, 64);
@@ -715,7 +715,7 @@ int16 GameDatabaseV3::loadgame(const char *filename, int16 version) {
 	}
 
 	uint32 header = in->readUint32BE();
-	if (header != MKID_BE('SGAM')) {
+	if (header != MKTAG('S','G','A','M')) {
 		warning("Save game header missing");
 		delete in;
 		return 1;
diff --git a/engines/made/pmvplayer.cpp b/engines/made/pmvplayer.cpp
index 87640f2b67..e37bd87a7e 100644
--- a/engines/made/pmvplayer.cpp
+++ b/engines/made/pmvplayer.cpp
@@ -50,14 +50,14 @@ bool PmvPlayer::play(const char *filename) {
 	uint32 chunkType, chunkSize, prevChunkSize = 0;
 
 	readChunk(chunkType, chunkSize);	// "MOVE"
-	if (chunkType != MKID_BE('MOVE')) {
+	if (chunkType != MKTAG('M','O','V','E')) {
 		warning("Unexpected PMV video header, expected 'MOVE'");
 		delete _fd;
 		return false;
 	}
 
 	readChunk(chunkType, chunkSize);	// "MHED"
-	if (chunkType != MKID_BE('MHED')) {
+	if (chunkType != MKTAG('M','H','E','D')) {
 		warning("Unexpected PMV video header, expected 'MHED'");
 		delete _fd;
 		return false;
@@ -111,7 +111,7 @@ bool PmvPlayer::play(const char *filename) {
 		int32 frameTime = _vm->_system->getMillis();
 
 		readChunk(chunkType, chunkSize);
-		if (chunkType != MKID_BE('MFRM')) {
+		if (chunkType != MKTAG('M','F','R','M')) {
 			warning("Unknown chunk type");
 		}
 
diff --git a/engines/made/resource.cpp b/engines/made/resource.cpp
index f8582aec40..e556e4ab38 100644
--- a/engines/made/resource.cpp
+++ b/engines/made/resource.cpp
@@ -57,7 +57,7 @@ PictureResource::~PictureResource() {
 }
 
 void PictureResource::load(byte *source, int size) {
-	if (READ_BE_UINT32(source) == MKID_BE('Flex')) {
+	if (READ_BE_UINT32(source) == MKTAG('F','l','e','x')) {
 		loadChunked(source, size);
 	} else {
 		loadRaw(source, size);
@@ -126,13 +126,13 @@ void PictureResource::loadChunked(byte *source, int size) {
 
 		debug(0, "chunkType = %08X; chunkSize = %d", chunkType, chunkSize);
 
-		if (chunkType == MKID_BE('Rect')) {
+		if (chunkType == MKTAG('R','e','c','t')) {
 			debug(0, "Rect");
 			sourceS->skip(4);
 			height = sourceS->readUint16BE();
 			width = sourceS->readUint16BE();
 			debug(0, "width = %d; height = %d", width, height);
-		} else if (chunkType == MKID_BE('fMap')) {
+		} else if (chunkType == MKTAG('f','M','a','p')) {
 			debug(0, "fMap");
 			lineSize = sourceS->readUint16BE();
 			sourceS->skip(11);
@@ -140,21 +140,21 @@ void PictureResource::loadChunked(byte *source, int size) {
 			cmdOffs = sourceS->pos();
 			sourceS->skip(chunkSize - 14);
 			debug(0, "lineSize = %d; cmdFlags = %d; cmdOffs = %04X", lineSize, cmdFlags, cmdOffs);
-		} else if (chunkType == MKID_BE('fLCo')) {
+		} else if (chunkType == MKTAG('f','L','C','o')) {
 			debug(0, "fLCo");
 			sourceS->skip(9);
 			pixelFlags = sourceS->readByte();
 			pixelOffs = sourceS->pos();
 			sourceS->skip(chunkSize - 10);
 			debug(0, "pixelFlags = %d; pixelOffs = %04X", pixelFlags, pixelOffs);
-		} else if (chunkType == MKID_BE('fPix')) {
+		} else if (chunkType == MKTAG('f','P','i','x')) {
 			debug(0, "fPix");
 			sourceS->skip(9);
 			maskFlags = sourceS->readByte();
 			maskOffs = sourceS->pos();
 			sourceS->skip(chunkSize - 10);
 			debug(0, "maskFlags = %d; maskOffs = %04X", maskFlags, maskOffs);
-		} else if (chunkType == MKID_BE('fGCo')) {
+		} else if (chunkType == MKTAG('f','G','C','o')) {
 			debug(0, "fGCo");
 			_hasPalette = true;
 			_paletteColorCount = chunkSize / 3;
diff --git a/engines/made/resource.h b/engines/made/resource.h
index 5d5664b4c7..ade6a23029 100644
--- a/engines/made/resource.h
+++ b/engines/made/resource.h
@@ -49,16 +49,16 @@ const int kMaxResourceCacheSize = 400 * 1024;
 
 
 enum ResourceType {
-	kResARCH = MKID_BE('ARCH'),
-	kResFREE = MKID_BE('FREE'),
-	kResOMNI = MKID_BE('OMNI'),
-	kResFLEX = MKID_BE('FLEX'),
-	kResSNDS = MKID_BE('SNDS'),
-	kResANIM = MKID_BE('ANIM'),
-	kResMENU = MKID_BE('MENU'),
-	kResFONT = MKID_BE('FONT'),
-	kResXMID = MKID_BE('XMID'),
-	kResMIDI = MKID_BE('MIDI')
+	kResARCH = MKTAG('A','R','C','H'),
+	kResFREE = MKTAG('F','R','E','E'),
+	kResOMNI = MKTAG('O','M','N','I'),
+	kResFLEX = MKTAG('F','L','E','X'),
+	kResSNDS = MKTAG('S','N','D','S'),
+	kResANIM = MKTAG('A','N','I','M'),
+	kResMENU = MKTAG('M','E','N','U'),
+	kResFONT = MKTAG('F','O','N','T'),
+	kResXMID = MKTAG('X','M','I','D'),
+	kResMIDI = MKTAG('M','I','D','I')
 };
 
 struct ResourceSlot;
diff --git a/engines/mohawk/console.cpp b/engines/mohawk/console.cpp
index 6dce147513..ee67c9f23c 100644
--- a/engines/mohawk/console.cpp
+++ b/engines/mohawk/console.cpp
@@ -563,7 +563,7 @@ bool RivenConsole::Cmd_DumpScript(int argc, const char **argv) {
 		// deriven.
 		debugN("\n\nDumping scripts for %s\'s card %d!\n", argv[1], (uint16)atoi(argv[3]));
 		debugN("==================================\n\n");
-		Common::SeekableReadStream *cardStream = _vm->getResource(MKID_BE('CARD'), (uint16)atoi(argv[3]));
+		Common::SeekableReadStream *cardStream = _vm->getResource(MKTAG('C','A','R','D'), (uint16)atoi(argv[3]));
 		cardStream->seek(4);
 		RivenScriptList scriptList = _vm->_scriptMan->readScripts(cardStream, false);
 		for (uint32 i = 0; i < scriptList.size(); i++) {
@@ -576,7 +576,7 @@ bool RivenConsole::Cmd_DumpScript(int argc, const char **argv) {
 		debugN("\n\nDumping scripts for %s\'s card %d hotspots!\n", argv[1], (uint16)atoi(argv[3]));
 		debugN("===========================================\n\n");
 
-		Common::SeekableReadStream *hsptStream = _vm->getResource(MKID_BE('HSPT'), (uint16)atoi(argv[3]));
+		Common::SeekableReadStream *hsptStream = _vm->getResource(MKTAG('H','S','P','T'), (uint16)atoi(argv[3]));
 
 		uint16 hotspotCount = hsptStream->readUint16BE();
 
diff --git a/engines/mohawk/cursors.cpp b/engines/mohawk/cursors.cpp
index 9233a8497c..b4969f990a 100644
--- a/engines/mohawk/cursors.cpp
+++ b/engines/mohawk/cursors.cpp
@@ -221,7 +221,7 @@ void MacCursorManager::setCursor(uint16 id) {
 	}
 
 	// Try a color cursor first
-	Common::SeekableReadStream *stream = _resFork->getResource(MKID_BE('crsr'), id);
+	Common::SeekableReadStream *stream = _resFork->getResource(MKTAG('c','r','s','r'), id);
 
 	if (stream) {
 		byte *cursor, *palette;
@@ -239,7 +239,7 @@ void MacCursorManager::setCursor(uint16 id) {
 	}
 
 	// Fall back to b&w cursors
-	stream = _resFork->getResource(MKID_BE('CURS'), id);
+	stream = _resFork->getResource(MKTAG('C','U','R','S'), id);
 
 	if (stream) {
 		setMacXorCursor(stream);
diff --git a/engines/mohawk/resource.h b/engines/mohawk/resource.h
index 18e8f80fb2..07c727951c 100644
--- a/engines/mohawk/resource.h
+++ b/engines/mohawk/resource.h
@@ -34,102 +34,102 @@
 namespace Mohawk {
 
 // Main FourCC's
-#define ID_MHWK MKID_BE('MHWK') // Main FourCC
-#define ID_RSRC MKID_BE('RSRC') // Resource Directory Tag
+#define ID_MHWK MKTAG('M','H','W','K') // Main FourCC
+#define ID_RSRC MKTAG('R','S','R','C') // Resource Directory Tag
 
 // Myst Resource FourCC's
-#define ID_CLRC MKID_BE('CLRC') // Cursor Hotspots
-#define ID_EXIT MKID_BE('EXIT') // Card Exit Scripts
-#define ID_HINT MKID_BE('HINT') // Cursor Hints
-#define ID_INIT MKID_BE('INIT') // Card Entrance Scripts
-#define ID_MSND MKID_BE('MSND') // Standard Mohawk Sound
-#define ID_RLST MKID_BE('RLST') // Resource List, Specifies HotSpots
-#define ID_RSFL MKID_BE('RSFL') // ??? (system.dat only)
-#define ID_VIEW MKID_BE('VIEW') // Card Details
-#define ID_WDIB MKID_BE('WDIB') // LZ-Compressed Windows Bitmap
+#define ID_CLRC MKTAG('C','L','R','C') // Cursor Hotspots
+#define ID_EXIT MKTAG('E','X','I','T') // Card Exit Scripts
+#define ID_HINT MKTAG('H','I','N','T') // Cursor Hints
+#define ID_INIT MKTAG('I','N','I','T') // Card Entrance Scripts
+#define ID_MSND MKTAG('M','S','N','D') // Standard Mohawk Sound
+#define ID_RLST MKTAG('R','L','S','T') // Resource List, Specifies HotSpots
+#define ID_RSFL MKTAG('R','S','F','L') // ??? (system.dat only)
+#define ID_VIEW MKTAG('V','I','E','W') // Card Details
+#define ID_WDIB MKTAG('W','D','I','B') // LZ-Compressed Windows Bitmap
 
 // Myst Masterpiece Edition Resource FourCC's (In addition to Myst FourCC's)
-#define ID_HELP MKID_BE('HELP') // Help Chunk
-#define ID_MJMP MKID_BE('MJMP') // MSND Jumps (To reduce MSND duplication)
-#define ID_PICT MKID_BE('PICT') // JPEG/PICT/WDIB Image
+#define ID_HELP MKTAG('H','E','L','P') // Help Chunk
+#define ID_MJMP MKTAG('M','J','M','P') // MSND Jumps (To reduce MSND duplication)
+#define ID_PICT MKTAG('P','I','C','T') // JPEG/PICT/WDIB Image
 
 // Riven Resource FourCC's
-#define ID_BLST MKID_BE('BLST') // Card Hotspot Enabling Lists
-#define ID_CARD MKID_BE('CARD') // Card Scripts
-#define ID_FLST MKID_BE('FLST') // Card SFXE Lists
-#define ID_HSPT MKID_BE('HSPT') // Card Hotspots
-#define ID_MLST MKID_BE('MLST') // Card Movie Lists
-#define ID_NAME MKID_BE('NAME') // Object Names
-#define ID_PLST MKID_BE('PLST') // Card Picture Lists
-#define ID_RMAP MKID_BE('RMAP') // Card Codes
-#define ID_SFXE MKID_BE('SFXE') // Water Effect Animations
-#define ID_SLST MKID_BE('SLST') // Card Ambient Sound Lists
-#define ID_TMOV MKID_BE('tMOV') // QuickTime Movie
+#define ID_BLST MKTAG('B','L','S','T') // Card Hotspot Enabling Lists
+#define ID_CARD MKTAG('C','A','R','D') // Card Scripts
+#define ID_FLST MKTAG('F','L','S','T') // Card SFXE Lists
+#define ID_HSPT MKTAG('H','S','P','T') // Card Hotspots
+#define ID_MLST MKTAG('M','L','S','T') // Card Movie Lists
+#define ID_NAME MKTAG('N','A','M','E') // Object Names
+#define ID_PLST MKTAG('P','L','S','T') // Card Picture Lists
+#define ID_RMAP MKTAG('R','M','A','P') // Card Codes
+#define ID_SFXE MKTAG('S','F','X','E') // Water Effect Animations
+#define ID_SLST MKTAG('S','L','S','T') // Card Ambient Sound Lists
+#define ID_TMOV MKTAG('t','M','O','V') // QuickTime Movie
 
 // Riven Saved Game FourCC's
-#define ID_VARS MKID_BE('VARS') // Variable Values
-#define ID_VERS MKID_BE('VERS') // Version Info
-#define ID_ZIPS MKID_BE('ZIPS') // Zip Mode Status
+#define ID_VARS MKTAG('V','A','R','S') // Variable Values
+#define ID_VERS MKTAG('V','E','R','S') // Version Info
+#define ID_ZIPS MKTAG('Z','I','P','S') // Zip Mode Status
 
 // Zoombini Resource FourCC's
-#define ID_SND  MKID_BE('\0SND') // Standard Mohawk Sound
-#define ID_CURS MKID_BE('CURS') // Cursor
-#define ID_SCRB MKID_BE('SCRB') // Feature Script
-#define ID_SCRS MKID_BE('SCRS') // Snoid Script
-#define ID_NODE MKID_BE('NODE') // Walk Node
-#define ID_PATH MKID_BE('PATH') // Walk Path
-#define ID_SHPL MKID_BE('SHPL') // Shape List
+#define ID_SND  MKTAG( 0 ,'S','N','D') // Standard Mohawk Sound
+#define ID_CURS MKTAG('C','U','R','S') // Cursor
+#define ID_SCRB MKTAG('S','C','R','B') // Feature Script
+#define ID_SCRS MKTAG('S','C','R','S') // Snoid Script
+#define ID_NODE MKTAG('N','O','D','E') // Walk Node
+#define ID_PATH MKTAG('P','A','T','H') // Walk Path
+#define ID_SHPL MKTAG('S','H','P','L') // Shape List
 
 // Living Books Resource FourCC's
-#define ID_TCUR MKID_BE('tCUR') // Cursor
-#define ID_BITL MKID_BE('BITL') // Book Item List
-#define ID_CTBL MKID_BE('CTBL') // Color Table
-#define ID_SCRP MKID_BE('SCRP') // Script
-#define ID_SPR  MKID_BE('SPR#') // Sprite?
-#define ID_VRSN MKID_BE('VRSN') // Version
-#define ID_ANI  MKID_BE('ANI ') // Animation
-#define ID_SHP  MKID_BE('SHP#') // Shape
-#define ID_WAV  MKID_BE('WAV ') // Old Sound Resource
-#define ID_BMAP MKID_BE('BMAP') // Old Mohawk Bitmap
-#define ID_BCOD MKID_BE('BCOD') // Book Code
+#define ID_TCUR MKTAG('t','C','U','R') // Cursor
+#define ID_BITL MKTAG('B','I','T','L') // Book Item List
+#define ID_CTBL MKTAG('C','T','B','L') // Color Table
+#define ID_SCRP MKTAG('S','C','R','P') // Script
+#define ID_SPR  MKTAG('S','P','R','#') // Sprite?
+#define ID_VRSN MKTAG('V','R','S','N') // Version
+#define ID_ANI  MKTAG('A','N','I',' ') // Animation
+#define ID_SHP  MKTAG('S','H','P','#') // Shape
+#define ID_WAV  MKTAG('W','A','V',' ') // Old Sound Resource
+#define ID_BMAP MKTAG('B','M','A','P') // Old Mohawk Bitmap
+#define ID_BCOD MKTAG('B','C','O','D') // Book Code
 
 // JamesMath Resource FourCC's
-#define ID_TANM MKID_BE('tANM') // Animation?
-#define ID_TMFO MKID_BE('tMFO') // ???
+#define ID_TANM MKTAG('t','A','N','M') // Animation?
+#define ID_TMFO MKTAG('t','M','F','O') // ???
 
 // CSTime Resource FourCC's
-#define ID_CINF MKID_BE('CINF') // Case Info
-#define ID_CONV MKID_BE('CONV') // Conversation
-#define ID_HOTS MKID_BE('HOTS') // Hotspot
-#define ID_INVO MKID_BE('INVO') // Inventory Object
-#define ID_QARS MKID_BE('QARS') // Question and Responses
-#define ID_SCEN MKID_BE('SCEN') // Scene
-#define ID_STRI MKID_BE('STRI') // String Entry?
+#define ID_CINF MKTAG('C','I','N','F') // Case Info
+#define ID_CONV MKTAG('C','O','N','V') // Conversation
+#define ID_HOTS MKTAG('H','O','T','S') // Hotspot
+#define ID_INVO MKTAG('I','N','V','O') // Inventory Object
+#define ID_QARS MKTAG('Q','A','R','S') // Question and Responses
+#define ID_SCEN MKTAG('S','C','E','N') // Scene
+#define ID_STRI MKTAG('S','T','R','I') // String Entry?
 
 // Mohawk Wave Tags
-#define ID_WAVE MKID_BE('WAVE') // Game Sound (Third Tag)
-#define ID_ADPC MKID_BE('ADPC') // Game Sound Chunk
-#define ID_DATA MKID_BE('Data') // Game Sound Chunk
-#define ID_CUE  MKID_BE('Cue#') // Game Sound Chunk
+#define ID_WAVE MKTAG('W','A','V','E') // Game Sound (Third Tag)
+#define ID_ADPC MKTAG('A','D','P','C') // Game Sound Chunk
+#define ID_DATA MKTAG('D','a','t','a') // Game Sound Chunk
+#define ID_CUE  MKTAG('C','u','e','#') // Game Sound Chunk
 
 // Mohawk MIDI Tags
-#define ID_MIDI MKID_BE('MIDI') // Game Sound (Third Tag), instead of WAVE
-#define ID_PRG  MKID_BE('Prg#') // MIDI Patch
+#define ID_MIDI MKTAG('M','I','D','I') // Game Sound (Third Tag), instead of WAVE
+#define ID_PRG  MKTAG('P','r','g','#') // MIDI Patch
 
 // Common Resource FourCC's
-#define ID_TBMP MKID_BE('tBMP') // Standard Mohawk Bitmap
-#define ID_TWAV MKID_BE('tWAV') // Standard Mohawk Sound
-#define ID_TPAL MKID_BE('tPAL') // Standard Mohawk Palette
-#define ID_TCNT MKID_BE('tCNT') // Shape Count (CSWorld, CSAmtrak, JamesMath)
-#define ID_TSCR MKID_BE('tSCR') // Script (CSWorld, CSAmtrak, Treehouse)
-#define ID_STRL MKID_BE('STRL') // String List (Zoombini, CSWorld, CSAmtrak)
-#define ID_TBMH MKID_BE('tBMH') // Standard Mohawk Bitmap
-#define ID_TMID MKID_BE('tMID') // Standard Mohawk MIDI
-#define ID_REGS MKID_BE('REGS') // Registration Data - Shape Offsets (Zoombini, Treehouse)
-#define ID_BYTS MKID_BE('BYTS') // Byte Array? (Used as Database Entry in CSWorld, CSAmtrak)
-#define ID_INTS MKID_BE('INTS') // uint16 Array? (CSWorld, CSAmtrak)
-#define ID_BBOX MKID_BE('BBOX') // Boxes? (CSWorld, CSAmtrak)
-#define ID_SYSX MKID_BE('SYSX') // MIDI Sysex
+#define ID_TBMP MKTAG('t','B','M','P') // Standard Mohawk Bitmap
+#define ID_TWAV MKTAG('t','W','A','V') // Standard Mohawk Sound
+#define ID_TPAL MKTAG('t','P','A','L') // Standard Mohawk Palette
+#define ID_TCNT MKTAG('t','C','N','T') // Shape Count (CSWorld, CSAmtrak, JamesMath)
+#define ID_TSCR MKTAG('t','S','C','R') // Script (CSWorld, CSAmtrak, Treehouse)
+#define ID_STRL MKTAG('S','T','R','L') // String List (Zoombini, CSWorld, CSAmtrak)
+#define ID_TBMH MKTAG('t','B','M','H') // Standard Mohawk Bitmap
+#define ID_TMID MKTAG('t','M','I','D') // Standard Mohawk MIDI
+#define ID_REGS MKTAG('R','E','G','S') // Registration Data - Shape Offsets (Zoombini, Treehouse)
+#define ID_BYTS MKTAG('B','Y','T','S') // Byte Array? (Used as Database Entry in CSWorld, CSAmtrak)
+#define ID_INTS MKTAG('I','N','T','S') // uint16 Array? (CSWorld, CSAmtrak)
+#define ID_BBOX MKTAG('B','B','O','X') // Boxes? (CSWorld, CSAmtrak)
+#define ID_SYSX MKTAG('S','Y','S','X') // MIDI Sysex
 
 struct FileTable {
 	uint32 offset;
diff --git a/engines/parallaction/disk_ns.cpp b/engines/parallaction/disk_ns.cpp
index 98770b9a6d..133b7bef6c 100644
--- a/engines/parallaction/disk_ns.cpp
+++ b/engines/parallaction/disk_ns.cpp
@@ -91,7 +91,7 @@ NSArchive::NSArchive(Common::SeekableReadStream *stream, Common::Platform platfo
 		if (features & GF_DEMO) {
 			isSmallArchive = stream->size() == SIZEOF_SMALL_ARCHIVE;
 		} else if (features & GF_LANG_MULT) {
-			isSmallArchive = (stream->readUint32BE() != MKID_BE('NDOS'));
+			isSmallArchive = (stream->readUint32BE() != MKTAG('N','D','O','S'));
 		}
 	}
 
@@ -801,7 +801,7 @@ void AmigaDisk_ns::unpackBitmap(byte *dst, byte *src, uint16 numFrames, uint16 b
 	uint16 planeSize = bytesPerPlane * height;
 
 	for (uint32 i = 0; i < numFrames; i++) {
-		if (READ_BE_UINT32(src) == MKID_BE('DLTA')) {
+		if (READ_BE_UINT32(src) == MKTAG('D','L','T','A')) {
 
 			uint size = READ_BE_UINT32(src + 4);
 
diff --git a/engines/queen/display.cpp b/engines/queen/display.cpp
index 7b16df52bf..b130b27a89 100644
--- a/engines/queen/display.cpp
+++ b/engines/queen/display.cpp
@@ -843,19 +843,19 @@ void Display::decodeLBM(const uint8 *src, uint32 srcSize, uint8 *dst, uint16 dst
 		uint32 size = READ_BE_UINT32(src + 4);
 		src += 8;
 		switch (type) {
-		case MKID_BE('BMHD'): {
+		case MKTAG('B','M','H','D'): {
 				*w = READ_BE_UINT16(src + 0);
 				*h = READ_BE_UINT16(src + 2);
 				planeCount = src[8];
 				planePitch = ((*w + 15) >> 4) * 2;
 			}
 			break;
-		case MKID_BE('CMAP'): {
+		case MKTAG('C','M','A','P'): {
 				assert(palStart <= palEnd && palEnd <= size / 3);
 				memcpy(pal, src + palStart * 3, (palEnd - palStart) * 3);
 			}
 			break;
-		case MKID_BE('BODY'): {
+		case MKTAG('B','O','D','Y'): {
 				uint32 planarSize = (*h) * planeCount * planePitch;
 				uint8 *planarBuf = new uint8[planarSize];
 				uint8 *dstPlanar = planarBuf;
diff --git a/engines/queen/queen.cpp b/engines/queen/queen.cpp
index 692e38179a..519f028cda 100644
--- a/engines/queen/queen.cpp
+++ b/engines/queen/queen.cpp
@@ -403,7 +403,7 @@ Common::InSaveFile *QueenEngine::readGameStateHeader(int slot, GameStateHeader *
 	char name[20];
 	makeGameStateName(slot, name);
 	Common::InSaveFile *file = _saveFileMan->openForLoading(name);
-	if (file && file->readUint32BE() == MKID_BE('SCVM')) {
+	if (file && file->readUint32BE() == MKTAG('S','C','V','M')) {
 		gsh->version = file->readUint32BE();
 		gsh->flags = file->readUint32BE();
 		gsh->dataSize = file->readUint32BE();
diff --git a/engines/queen/resource.cpp b/engines/queen/resource.cpp
index a70d1f1613..e8519ee68b 100644
--- a/engines/queen/resource.cpp
+++ b/engines/queen/resource.cpp
@@ -132,7 +132,7 @@ void Resource::loadTextFile(const char *filename, Common::StringArray &stringLis
 bool Resource::detectVersion(DetectedGameVersion *ver, Common::File *f) {
 	memset(ver, 0, sizeof(DetectedGameVersion));
 
-	if (f->readUint32BE() == MKID_BE('QTBL')) {
+	if (f->readUint32BE() == MKTAG('Q','T','B','L')) {
 		f->read(ver->str, 6);
 		f->skip(2);
 		ver->compression = f->readByte();
@@ -269,7 +269,7 @@ void Resource::seekResourceFile(int num, uint32 offset) {
 void Resource::readTableFile(uint8 version, uint32 offset) {
 	Common::File tableFile;
 	tableFile.open(_tableFilename);
-	if (tableFile.isOpen() && tableFile.readUint32BE() == MKID_BE('QTBL')) {
+	if (tableFile.isOpen() && tableFile.readUint32BE() == MKTAG('Q','T','B','L')) {
 		uint32 tableVersion = tableFile.readUint32BE();
 		if (version > tableVersion) {
 			error("The game you are trying to play requires version %d of queen.tbl, "
diff --git a/engines/saga/detection.cpp b/engines/saga/detection.cpp
index f8c06bff8c..b1bcc99295 100644
--- a/engines/saga/detection.cpp
+++ b/engines/saga/detection.cpp
@@ -264,7 +264,7 @@ SaveStateDescriptor SagaMetaEngine::querySaveMetaInfos(const char *target, int s
 		if (version < 4)
 			warning("This savegame is not endian-safe. There may be problems");
 
-		if (type != MKID_BE('SAGA')) {
+		if (type != MKTAG('S','A','G','A')) {
 			error("SagaEngine::load wrong save game format");
 		}
 
diff --git a/engines/saga/resource_hrs.cpp b/engines/saga/resource_hrs.cpp
index 2ec2099c8d..21cf0ef4c1 100644
--- a/engines/saga/resource_hrs.cpp
+++ b/engines/saga/resource_hrs.cpp
@@ -62,7 +62,7 @@ bool ResourceContext_HRS::loadResV2(uint32 contextSize) {
 	readElement(_file, origin);
 
 	// Check if the file is valid
-	if (origin.id != MKID_BE('HRES')) {	// header
+	if (origin.id != MKTAG('H','R','E','S')) {	// header
 		return false;
 	}
 
diff --git a/engines/saga/resource_rsc.cpp b/engines/saga/resource_rsc.cpp
index 42c4dc05e8..089757ca27 100644
--- a/engines/saga/resource_rsc.cpp
+++ b/engines/saga/resource_rsc.cpp
@@ -30,7 +30,7 @@
 
 namespace Saga {
 
-#define ID_MIDI     MKID_BE('Midi')
+#define ID_MIDI     MKTAG('M','i','d','i')
 
 bool ResourceContext_RSC::loadMacMIDI() {
 	// Sanity check
diff --git a/engines/saga/saveload.cpp b/engines/saga/saveload.cpp
index c5388d6878..9edb79fa7c 100644
--- a/engines/saga/saveload.cpp
+++ b/engines/saga/saveload.cpp
@@ -151,7 +151,7 @@ void SagaEngine::fillSaveList() {
 				_saveHeader.version = in->readUint32LE();
 				in->read(_saveHeader.name, sizeof(_saveHeader.name));
 
-				if (_saveHeader.type != MKID_BE('SAGA')) {
+				if (_saveHeader.type != MKTAG('S','A','G','A')) {
 					warning("SagaEngine::load wrong save %s format", name);
 					i++;
 					continue;
@@ -175,7 +175,7 @@ void SagaEngine::save(const char *fileName, const char *saveName) {
 		return;
 	}
 
-	_saveHeader.type = MKID_BE('SAGA');
+	_saveHeader.type = MKTAG('S','A','G','A');
 	_saveHeader.size = 0;
 	_saveHeader.version = CURRENT_SAGA_VER;
 	// Note that IHNM has a smaller save title size than ITE
@@ -287,7 +287,7 @@ void SagaEngine::load(const char *fileName) {
 	if (_saveHeader.version < 4)
 		warning("This savegame is not endian-safe. There may be problems");
 
-	if (_saveHeader.type != MKID_BE('SAGA')) {
+	if (_saveHeader.type != MKTAG('S','A','G','A')) {
 		error("SagaEngine::load wrong save game format");
 	}
 
diff --git a/engines/saga/script.cpp b/engines/saga/script.cpp
index 3ae2f19e1b..bd1d6e5d84 100644
--- a/engines/saga/script.cpp
+++ b/engines/saga/script.cpp
@@ -160,7 +160,7 @@ SAGA2Script::SAGA2Script(SagaEngine *vm) : Script(vm) {
 	}
 
 	// Script export segment (lookup table)
-	uint32 saga2ExportSegId = MKID_BE('_EXP');
+	uint32 saga2ExportSegId = MKTAG('_','E','X','P');
 	int32 entryNum = _scriptContext->getEntryNum(saga2ExportSegId);
 	if (entryNum < 0)
 		error("Unable to locate the script's export segment");
@@ -176,7 +176,7 @@ SAGA2Script::SAGA2Script(SagaEngine *vm) : Script(vm) {
 
 	// Script data segment
 	/*
-	uint32 saga2DataSegId = MKID_BE('__DA');
+	uint32 saga2DataSegId = MKTAG('_','_','D','A');
 	entryNum = _scriptContext->getEntryNum(saga2DataSegId);
 	if (entryNum < 0)
 		error("Unable to locate the script's data segment");
diff --git a/engines/sci/graphics/palette.cpp b/engines/sci/graphics/palette.cpp
index 5a6b1859cd..0433479a09 100644
--- a/engines/sci/graphics/palette.cpp
+++ b/engines/sci/graphics/palette.cpp
@@ -903,7 +903,7 @@ void GfxPalette::loadMacIconBarPalette() {
 	if (!g_sci->hasMacIconBar())
 		return;
 
-	Common::SeekableReadStream *clutStream = g_sci->getMacExecutable()->getResource(MKID_BE('clut'), 150);
+	Common::SeekableReadStream *clutStream = g_sci->getMacExecutable()->getResource(MKTAG('c','l','u','t'), 150);
 
 	if (!clutStream)
 		error("Could not find clut 150 for the Mac icon bar");
diff --git a/engines/sci/resource.cpp b/engines/sci/resource.cpp
index 61df02acf9..4caa77b0ae 100644
--- a/engines/sci/resource.cpp
+++ b/engines/sci/resource.cpp
@@ -1488,7 +1488,7 @@ void ResourceManager::readResourcePatchesBase36() {
 				Common::SeekableReadStream *stream = SearchMan.createReadStreamForMember(name);
 				uint32 tag = stream->readUint32BE();
 
-				if (tag == MKID_BE('RIFF') || tag == MKID_BE('FORM')) {
+				if (tag == MKTAG('R','I','F','F') || tag == MKTAG('F','O','R','M')) {
 					delete stream;
 					processWavePatch(resource36, name);
 					continue;
@@ -1497,7 +1497,7 @@ void ResourceManager::readResourcePatchesBase36() {
 				// Check for SOL as well
 				tag = (tag << 16) | stream->readUint16BE();
 					
-				if (tag != MKID_BE('SOL\0')) {
+				if (tag != MKTAG('S','O','L',0)) {
 					delete stream;
 					continue;
 				}
@@ -1746,25 +1746,25 @@ struct MacResTag {
 };
 
 static const MacResTag macResTagMap[] = {
-	{ MKID_BE('V56 '), kResourceTypeView },
-	{ MKID_BE('P56 '), kResourceTypePic },
-	{ MKID_BE('SCR '), kResourceTypeScript },
-	{ MKID_BE('TEX '), kResourceTypeText },
-	{ MKID_BE('SND '), kResourceTypeSound },
-	{ MKID_BE('VOC '), kResourceTypeVocab },
-	{ MKID_BE('FON '), kResourceTypeFont },
-	{ MKID_BE('CURS'), kResourceTypeCursor },
-	{ MKID_BE('crsr'), kResourceTypeCursor },
-	{ MKID_BE('Pat '), kResourceTypePatch },
-	{ MKID_BE('PAL '), kResourceTypePalette },
-	{ MKID_BE('snd '), kResourceTypeAudio },
-	{ MKID_BE('MSG '), kResourceTypeMessage },
-	{ MKID_BE('HEP '), kResourceTypeHeap },
-	{ MKID_BE('IBIN'), kResourceTypeMacIconBarPictN },
-	{ MKID_BE('IBIS'), kResourceTypeMacIconBarPictS },
-	{ MKID_BE('PICT'), kResourceTypeMacPict },
-	{ MKID_BE('SYN '), kResourceTypeSync },
-	{ MKID_BE('SYNC'), kResourceTypeSync }
+	{ MKTAG('V','5','6',' '), kResourceTypeView },
+	{ MKTAG('P','5','6',' '), kResourceTypePic },
+	{ MKTAG('S','C','R',' '), kResourceTypeScript },
+	{ MKTAG('T','E','X',' '), kResourceTypeText },
+	{ MKTAG('S','N','D',' '), kResourceTypeSound },
+	{ MKTAG('V','O','C',' '), kResourceTypeVocab },
+	{ MKTAG('F','O','N',' '), kResourceTypeFont },
+	{ MKTAG('C','U','R','S'), kResourceTypeCursor },
+	{ MKTAG('c','r','s','r'), kResourceTypeCursor },
+	{ MKTAG('P','a','t',' '), kResourceTypePatch },
+	{ MKTAG('P','A','L',' '), kResourceTypePalette },
+	{ MKTAG('s','n','d',' '), kResourceTypeAudio },
+	{ MKTAG('M','S','G',' '), kResourceTypeMessage },
+	{ MKTAG('H','E','P',' '), kResourceTypeHeap },
+	{ MKTAG('I','B','I','N'), kResourceTypeMacIconBarPictN },
+	{ MKTAG('I','B','I','S'), kResourceTypeMacIconBarPictS },
+	{ MKTAG('P','I','C','T'), kResourceTypeMacPict },
+	{ MKTAG('S','Y','N',' '), kResourceTypeSync },
+	{ MKTAG('S','Y','N','C'), kResourceTypeSync }
 };
 
 static Common::Array<uint32> resTypeToMacTags(ResourceType type) {
diff --git a/engines/sci/resource_audio.cpp b/engines/sci/resource_audio.cpp
index 386bfb37f5..6e74553f56 100644
--- a/engines/sci/resource_audio.cpp
+++ b/engines/sci/resource_audio.cpp
@@ -53,9 +53,9 @@ AudioVolumeResourceSource::AudioVolumeResourceSource(ResourceManager *resMan, co
 	fileStream->seek(0, SEEK_SET);
 	uint32 compressionType = fileStream->readUint32BE();
 	switch (compressionType) {
-	case MKID_BE('MP3 '):
-	case MKID_BE('OGG '):
-	case MKID_BE('FLAC'):
+	case MKTAG('M','P','3',' '):
+	case MKTAG('O','G','G',' '):
+	case MKTAG('F','L','A','C'):
 		// Detected a compressed audio volume
 		_audioCompressionType = compressionType;
 		// Now read the whole offset mapping table for later usage
@@ -91,7 +91,7 @@ bool Resource::loadFromWaveFile(Common::SeekableReadStream *file) {
 bool Resource::loadFromAudioVolumeSCI11(Common::SeekableReadStream *file) {
 	// Check for WAVE files here
 	uint32 riffTag = file->readUint32BE();
-	if (riffTag == MKID_BE('RIFF')) {
+	if (riffTag == MKTAG('R','I','F','F')) {
 		_headerSize = 0;
 		size = file->readUint32LE() + 8;
 		file->seek(-8, SEEK_CUR);
diff --git a/engines/sci/sound/audio.cpp b/engines/sci/sound/audio.cpp
index 73f471b247..53311b4252 100644
--- a/engines/sci/sound/audio.cpp
+++ b/engines/sci/sound/audio.cpp
@@ -195,7 +195,7 @@ static bool readSOLHeader(Common::SeekableReadStream *audioStream, int headerSiz
 
 	uint32 tag = audioStream->readUint32BE();
 
-	if (tag != MKID_BE('SOL\0')) {
+	if (tag != MKTAG('S','O','L',0)) {
 		warning("No 'SOL' FourCC found");
 		return false;
 	}
@@ -290,17 +290,17 @@ Audio::RewindableAudioStream *AudioPlayer::getAudioStream(uint32 number, uint32
 		Common::SeekableReadStream *compressedStream = new Common::MemoryReadStream(compressedData, audioRes->size, DisposeAfterUse::YES);
 		
 		switch (audioCompressionType) {
-		case MKID_BE('MP3 '):
+		case MKTAG('M','P','3',' '):
 #ifdef USE_MAD
 			audioSeekStream = Audio::makeMP3Stream(compressedStream, DisposeAfterUse::YES);
 #endif
 			break;
-		case MKID_BE('OGG '):
+		case MKTAG('O','G','G',' '):
 #ifdef USE_VORBIS
 			audioSeekStream = Audio::makeVorbisStream(compressedStream, DisposeAfterUse::YES);
 #endif
 			break;
-		case MKID_BE('FLAC'):
+		case MKTAG('F','L','A','C'):
 #ifdef USE_FLAC
 			audioSeekStream = Audio::makeFLACStream(compressedStream, DisposeAfterUse::YES);
 #endif
@@ -319,7 +319,7 @@ Audio::RewindableAudioStream *AudioPlayer::getAudioStream(uint32 number, uint32
 				Common::MemoryReadStream dataStream(audioRes->data, audioRes->size, DisposeAfterUse::NO);
 				data = readSOLAudio(&dataStream, size, audioFlags, flags);
 			}
-		} else if (audioRes->size > 4 && READ_BE_UINT32(audioRes->data) == MKID_BE('RIFF')) {
+		} else if (audioRes->size > 4 && READ_BE_UINT32(audioRes->data) == MKTAG('R','I','F','F')) {
 			// WAVE detected
 			Common::SeekableReadStream *waveStream = new Common::MemoryReadStream(audioRes->data, audioRes->size, DisposeAfterUse::NO);
 
@@ -331,7 +331,7 @@ Audio::RewindableAudioStream *AudioPlayer::getAudioStream(uint32 number, uint32
 
 			waveStream->seek(0, SEEK_SET);
 			audioStream = Audio::makeWAVStream(waveStream, DisposeAfterUse::YES);
-		} else if (audioRes->size > 4 && READ_BE_UINT32(audioRes->data) == MKID_BE('FORM')) {
+		} else if (audioRes->size > 4 && READ_BE_UINT32(audioRes->data) == MKTAG('F','O','R','M')) {
 			// AIFF detected
 			Common::SeekableReadStream *waveStream = new Common::MemoryReadStream(audioRes->data, audioRes->size, DisposeAfterUse::NO);
 
diff --git a/engines/scumm/actor.cpp b/engines/scumm/actor.cpp
index 39db47b102..13581c4b45 100644
--- a/engines/scumm/actor.cpp
+++ b/engines/scumm/actor.cpp
@@ -1853,8 +1853,8 @@ void Actor::animateLimb(int limb, int f) {
 		byte *akos = _vm->getResourceAddress(rtCostume, _costume);
 		assert(akos);
 
-		aksq = _vm->findResourceData(MKID_BE('AKSQ'), akos);
-		akfo = _vm->findResourceData(MKID_BE('AKFO'), akos);
+		aksq = _vm->findResourceData(MKTAG('A','K','S','Q'), akos);
+		akfo = _vm->findResourceData(MKTAG('A','K','F','O'), akos);
 
 		size = _vm->getResourceDataSize(akfo) / 2;
 
@@ -2374,7 +2374,7 @@ void Actor::remapActorPaletteColor(int color, int new_color) {
 		return;
 	}
 
-	akpl = _vm->findResourceData(MKID_BE('AKPL'), akos);
+	akpl = _vm->findResourceData(MKTAG('A','K','P','L'), akos);
 	if (!akpl) {
 		debugC(DEBUG_ACTORS, "Actor::remapActorPaletteColor: Can't remap actor %d, costume %d doesn't contain an AKPL block", _number, _costume);
 		return;
@@ -2409,7 +2409,7 @@ void Actor::remapActorPalette(int r_fact, int g_fact, int b_fact, int threshold)
 		return;
 	}
 
-	akpl = _vm->findResourceData(MKID_BE('AKPL'), akos);
+	akpl = _vm->findResourceData(MKTAG('A','K','P','L'), akos);
 	if (!akpl) {
 		debugC(DEBUG_ACTORS, "Actor::remapActorPalette: Can't remap actor %d, costume %d doesn't contain an AKPL block", _number, _costume);
 		return;
@@ -2418,7 +2418,7 @@ void Actor::remapActorPalette(int r_fact, int g_fact, int b_fact, int threshold)
 	// Get the number palette entries
 	akpl_size = _vm->getResourceDataSize(akpl);
 
-	rgbs = _vm->findResourceData(MKID_BE('RGBS'), akos);
+	rgbs = _vm->findResourceData(MKTAG('R','G','B','S'), akos);
 
 	if (!rgbs) {
 		debugC(DEBUG_ACTORS, "Actor::remapActorPalette: Can't remap actor %d costume %d doesn't contain an RGB block", _number, _costume);
@@ -2535,19 +2535,19 @@ void ScummEngine_v71he::postProcessAuxQueue() {
 				if (_game.heversion >= 72)
 					dy -= a->getElevation();
 
-				const uint8 *akax = findResource(MKID_BE('AKAX'), cost);
+				const uint8 *akax = findResource(MKTAG('A','K','A','X'), cost);
 				assert(akax);
 				const uint8 *auxd = findPalInPals(akax, ae->subIndex) - _resourceHeaderSize;
 				assert(auxd);
-				const uint8 *frel = findResourceData(MKID_BE('FREL'), auxd);
+				const uint8 *frel = findResourceData(MKTAG('F','R','E','L'), auxd);
 				if (frel) {
 					error("unhandled FREL block");
 				}
-				const uint8 *disp = findResourceData(MKID_BE('DISP'), auxd);
+				const uint8 *disp = findResourceData(MKTAG('D','I','S','P'), auxd);
 				if (disp) {
 					error("unhandled DISP block");
 				}
-				const uint8 *axfd = findResourceData(MKID_BE('AXFD'), auxd);
+				const uint8 *axfd = findResourceData(MKTAG('A','X','F','D'), auxd);
 				assert(axfd);
 
 				uint16 comp = READ_LE_UINT16(axfd);
@@ -2567,7 +2567,7 @@ void ScummEngine_v71he::postProcessAuxQueue() {
 						error("unimplemented compression type %d", comp);
 					}
 				}
-				const uint8 *axur = findResourceData(MKID_BE('AXUR'), auxd);
+				const uint8 *axur = findResourceData(MKTAG('A','X','U','R'), auxd);
 				if (axur) {
 					uint16 n = READ_LE_UINT16(axur); axur += 2;
 					while (n--) {
@@ -2579,7 +2579,7 @@ void ScummEngine_v71he::postProcessAuxQueue() {
 						axur += 8;
 					}
 				}
-				const uint8 *axer = findResourceData(MKID_BE('AXER'), auxd);
+				const uint8 *axer = findResourceData(MKTAG('A','X','E','R'), auxd);
 				if (axer) {
 					a->_auxBlock.visible  = true;
 					a->_auxBlock.r.left   = (int16)READ_LE_UINT16(axer + 0) + dx;
diff --git a/engines/scumm/akos.cpp b/engines/scumm/akos.cpp
index 354a1d4491..8acbb8058e 100644
--- a/engines/scumm/akos.cpp
+++ b/engines/scumm/akos.cpp
@@ -146,7 +146,7 @@ void AkosCostumeLoader::loadCostume(int id) {
 bool AkosCostumeLoader::hasManyDirections() {
 	const AkosHeader *akhd;
 
-	akhd = (const AkosHeader *)_vm->findResourceData(MKID_BE('AKHD'), _akos);
+	akhd = (const AkosHeader *)_vm->findResourceData(MKTAG('A','K','H','D'), _akos);
 	return (akhd->flags & 2) != 0;
 }
 
@@ -170,12 +170,12 @@ void AkosCostumeLoader::costumeDecodeData(Actor *a, int frame, uint usemask) {
 	else
 		anim = newDirToOldDir(a->getFacing()) + frame * 4;
 
-	akhd = (const AkosHeader *)_vm->findResourceData(MKID_BE('AKHD'), _akos);
+	akhd = (const AkosHeader *)_vm->findResourceData(MKTAG('A','K','H','D'), _akos);
 
 	if (anim >= READ_LE_UINT16(&akhd->num_anims))
 		return;
 
-	r = _vm->findResourceData(MKID_BE('AKCH'), _akos);
+	r = _vm->findResourceData(MKTAG('A','K','C','H'), _akos);
 	assert(r);
 
 	offs = READ_LE_UINT16(r + anim * sizeof(uint16));
@@ -183,8 +183,8 @@ void AkosCostumeLoader::costumeDecodeData(Actor *a, int frame, uint usemask) {
 		return;
 	r += offs;
 
-	const uint8 *akstPtr = _vm->findResourceData(MKID_BE('AKST'), _akos);
-	const uint8 *aksfPtr = _vm->findResourceData(MKID_BE('AKSF'), _akos);
+	const uint8 *akstPtr = _vm->findResourceData(MKTAG('A','K','S','T'), _akos);
+	const uint8 *aksfPtr = _vm->findResourceData(MKTAG('A','K','S','F'), _akos);
 
 	i = 0;
 	mask = READ_LE_UINT16(r); r += 2;
@@ -341,21 +341,21 @@ void AkosRenderer::setCostume(int costume, int shadow) {
 	const byte *akos = _vm->getResourceAddress(rtCostume, costume);
 	assert(akos);
 
-	akhd = (const AkosHeader *) _vm->findResourceData(MKID_BE('AKHD'), akos);
-	akof = (const AkosOffset *) _vm->findResourceData(MKID_BE('AKOF'), akos);
-	akci = _vm->findResourceData(MKID_BE('AKCI'), akos);
-	aksq = _vm->findResourceData(MKID_BE('AKSQ'), akos);
-	akcd = _vm->findResourceData(MKID_BE('AKCD'), akos);
-	akpl = _vm->findResourceData(MKID_BE('AKPL'), akos);
+	akhd = (const AkosHeader *) _vm->findResourceData(MKTAG('A','K','H','D'), akos);
+	akof = (const AkosOffset *) _vm->findResourceData(MKTAG('A','K','O','F'), akos);
+	akci = _vm->findResourceData(MKTAG('A','K','C','I'), akos);
+	aksq = _vm->findResourceData(MKTAG('A','K','S','Q'), akos);
+	akcd = _vm->findResourceData(MKTAG('A','K','C','D'), akos);
+	akpl = _vm->findResourceData(MKTAG('A','K','P','L'), akos);
 	_codec = READ_LE_UINT16(&akhd->codec);
-	akct = _vm->findResourceData(MKID_BE('AKCT'), akos);
-	rgbs = _vm->findResourceData(MKID_BE('RGBS'), akos);
+	akct = _vm->findResourceData(MKTAG('A','K','C','T'), akos);
+	rgbs = _vm->findResourceData(MKTAG('R','G','B','S'), akos);
 
 	xmap = 0;
 	if (shadow) {
 		const uint8 *xmapPtr = _vm->getResourceAddress(rtImage, shadow);
 		assert(xmapPtr);
-		xmap = _vm->findResourceData(MKID_BE('XMAP'), xmapPtr);
+		xmap = _vm->findResourceData(MKTAG('X','M','A','P'), xmapPtr);
 		assert(xmap);
 	}
 }
@@ -1384,8 +1384,8 @@ bool ScummEngine_v6::akos_increaseAnims(const byte *akos, Actor *a) {
 	uint size;
 	bool result;
 
-	aksq = findResourceData(MKID_BE('AKSQ'), akos);
-	akfo = findResourceData(MKID_BE('AKFO'), akos);
+	aksq = findResourceData(MKTAG('A','K','S','Q'), akos);
+	akfo = findResourceData(MKTAG('A','K','F','O'), akos);
 
 	size = getResourceDataSize(akfo) / 2;
 
diff --git a/engines/scumm/cursor.cpp b/engines/scumm/cursor.cpp
index f49635d10f..bb3c4bcc02 100644
--- a/engines/scumm/cursor.cpp
+++ b/engines/scumm/cursor.cpp
@@ -240,7 +240,7 @@ void ScummEngine_v6::setCursorFromImg(uint img, uint room, uint imgindex) {
 		room = getObjectRoom(img);
 
 	findObjectInRoom(&foir, foCodeHeader | foImageHeader | foCheckAlreadyLoaded, img, room);
-	imhd = (const ImageHeader *)findResourceData(MKID_BE('IMHD'), foir.obim);
+	imhd = (const ImageHeader *)findResourceData(MKTAG('I','M','H','D'), foir.obim);
 
 	if (_game.version == 8) {
 		setCursorHotspot(READ_LE_UINT32(&imhd->v8.hotspot[0].x),
@@ -270,7 +270,7 @@ void ScummEngine_v6::setCursorFromImg(uint img, uint room, uint imgindex) {
 		if (size > sizeof(_grabbedCursor))
 			error("setCursorFromImg: Cursor image too large");
 
-		bomp = findResource(MKID_BE('BOMP'), dataptr);
+		bomp = findResource(MKTAG('B','O','M','P'), dataptr);
 	}
 
 	if (bomp != NULL)
diff --git a/engines/scumm/gfx.cpp b/engines/scumm/gfx.cpp
index 0db77a1b7d..a6a97ec426 100644
--- a/engines/scumm/gfx.cpp
+++ b/engines/scumm/gfx.cpp
@@ -283,7 +283,7 @@ void Gdi::loadTiles(byte *roomptr) {
 
 #ifdef USE_RGB_COLOR
 void GdiPCEngine::loadTiles(byte *roomptr) {
-	decodePCEngineTileData(_vm->findResourceData(MKID_BE('TILE'), roomptr));
+	decodePCEngineTileData(_vm->findResourceData(MKTAG('T','I','L','E'), roomptr));
 }
 #endif
 
@@ -858,7 +858,7 @@ void ScummEngine::initBGBuffers(int height) {
 		_gdi->_numZBuffer = 2;
 	} else if (_game.features & GF_SMALL_HEADER) {
 		int off;
-		ptr = findResourceData(MKID_BE('SMAP'), room);
+		ptr = findResourceData(MKTAG('S','M','A','P'), room);
 		_gdi->_numZBuffer = 0;
 
 		if (_game.features & GF_16COLOR)
@@ -873,13 +873,13 @@ void ScummEngine::initBGBuffers(int height) {
 		}
 	} else if (_game.version == 8) {
 		// in V8 there is no RMIH and num z buffers is in RMHD
-		ptr = findResource(MKID_BE('RMHD'), room);
+		ptr = findResource(MKTAG('R','M','H','D'), room);
 		_gdi->_numZBuffer = READ_LE_UINT32(ptr + 24) + 1;
 	} else if (_game.heversion >= 70) {
-		ptr = findResource(MKID_BE('RMIH'), room);
+		ptr = findResource(MKTAG('R','M','I','H'), room);
 		_gdi->_numZBuffer = READ_LE_UINT16(ptr + 8) + 1;
 	} else {
-		ptr = findResource(MKID_BE('RMIH'), findResource(MKID_BE('RMIM'), room));
+		ptr = findResource(MKTAG('R','M','I','H'), findResource(MKTAG('R','M','I','M'), room));
 		_gdi->_numZBuffer = READ_LE_UINT16(ptr + 8) + 1;
 	}
 	assert(_gdi->_numZBuffer >= 1 && _gdi->_numZBuffer <= 8);
@@ -1647,9 +1647,9 @@ int Gdi::getZPlanes(const byte *ptr, const byte *zplane_list[9], bool bmapImage)
 	if ((_vm->_game.features & GF_SMALL_HEADER) || _vm->_game.version == 8)
 		zplane_list[0] = ptr;
 	else if (bmapImage)
-		zplane_list[0] = _vm->findResource(MKID_BE('BMAP'), ptr);
+		zplane_list[0] = _vm->findResource(MKTAG('B','M','A','P'), ptr);
 	else
-		zplane_list[0] = _vm->findResource(MKID_BE('SMAP'), ptr);
+		zplane_list[0] = _vm->findResource(MKTAG('S','M','A','P'), ptr);
 
 	if (_zbufferDisabled)
 		numzbuf = 0;
@@ -1692,11 +1692,11 @@ int Gdi::getZPlanes(const byte *ptr, const byte *zplane_list[9], bool bmapImage)
 			}
 		} else {
 			const uint32 zplane_tags[] = {
-				MKID_BE('ZP00'),
-				MKID_BE('ZP01'),
-				MKID_BE('ZP02'),
-				MKID_BE('ZP03'),
-				MKID_BE('ZP04')
+				MKTAG('Z','P','0','0'),
+				MKTAG('Z','P','0','1'),
+				MKTAG('Z','P','0','2'),
+				MKTAG('Z','P','0','3'),
+				MKTAG('Z','P','0','4')
 			};
 
 			for (i = 1; i < numzbuf; i++) {
@@ -1733,7 +1733,7 @@ void Gdi::drawBitmap(const byte *ptr, VirtScreen *vs, int x, const int y, const
 		// Skip to the BSTR->WRAP->OFFS chunk
 		smap_ptr = ptr + 24;
 	} else {
-		smap_ptr = _vm->findResource(MKID_BE('SMAP'), ptr);
+		smap_ptr = _vm->findResource(MKTAG('S','M','A','P'), ptr);
 		assert(smap_ptr);
 	}
 
@@ -1741,7 +1741,7 @@ void Gdi::drawBitmap(const byte *ptr, VirtScreen *vs, int x, const int y, const
 
 	const byte *tmsk_ptr = NULL;
 	if (_vm->_game.heversion >= 72) {
-		tmsk_ptr = _vm->findResource(MKID_BE('TMSK'), ptr);
+		tmsk_ptr = _vm->findResource(MKTAG('T','M','S','K'), ptr);
 	}
 
 	if (y + height > vs->h) {
@@ -2011,7 +2011,7 @@ void Gdi::drawBMAPBg(const byte *ptr, VirtScreen *vs) {
 	byte *mask_ptr;
 	const byte *zplane_list[9];
 
-	const byte *bmap_ptr = _vm->findResourceData(MKID_BE('BMAP'), ptr);
+	const byte *bmap_ptr = _vm->findResourceData(MKTAG('B','M','A','P'), ptr);
 	assert(bmap_ptr);
 
 	byte code = *bmap_ptr++;
@@ -2091,7 +2091,7 @@ void Gdi::drawBMAPBg(const byte *ptr, VirtScreen *vs) {
 }
 
 void Gdi::drawBMAPObject(const byte *ptr, VirtScreen *vs, int obj, int x, int y, int w, int h) {
-	const byte *bmap_ptr = _vm->findResourceData(MKID_BE('BMAP'), ptr);
+	const byte *bmap_ptr = _vm->findResourceData(MKTAG('B','M','A','P'), ptr);
 	assert(bmap_ptr);
 
 	byte code = *bmap_ptr++;
@@ -2828,10 +2828,10 @@ void GdiPCEngine::decodeStrip(const byte *ptr, uint16 *tiles, byte *colors, uint
 void GdiPCEngine::decodePCEngineGfx(const byte *room) {
 	uint16* stripOffsets;
 
-	decodePCEngineTileData(_vm->findResourceData(MKID_BE('TILE'), room));
-	decodePCEngineMaskData(_vm->findResourceData(MKID_BE('ZP00'), room));
+	decodePCEngineTileData(_vm->findResourceData(MKTAG('T','I','L','E'), room));
+	decodePCEngineMaskData(_vm->findResourceData(MKTAG('Z','P','0','0'), room));
 
-	const byte* smap_ptr = _vm->findResourceData(MKID_BE('IM00'), room);
+	const byte* smap_ptr = _vm->findResourceData(MKTAG('I','M','0','0'), room);
 	smap_ptr++; // roomID
 	int numStrips = *smap_ptr++;
 	int numRows = *smap_ptr++;
diff --git a/engines/scumm/he/animation_he.cpp b/engines/scumm/he/animation_he.cpp
index 7840b9df20..e3e25c161c 100644
--- a/engines/scumm/he/animation_he.cpp
+++ b/engines/scumm/he/animation_he.cpp
@@ -112,7 +112,7 @@ void MoviePlayer::handleNextFrame() {
 	if (_flags & 2) {
 		uint8 *dstPtr = _vm->getResourceAddress(rtImage, _wizResNum);
 		assert(dstPtr);
-		uint8 *dst = _vm->findWrappedBlock(MKID_BE('WIZD'), dstPtr, 0, 0);
+		uint8 *dst = _vm->findWrappedBlock(MKTAG('W','I','Z','D'), dstPtr, 0, 0);
 		assert(dst);
 		copyFrameToBuffer(dst, kDstResource, 0, 0, _vm->_screenWidth * _vm->_bytesPerPixel);
 	} else if (_flags & 1) {
diff --git a/engines/scumm/he/cup_player_he.cpp b/engines/scumm/he/cup_player_he.cpp
index 79bb47aafc..a16af73135 100644
--- a/engines/scumm/he/cup_player_he.cpp
+++ b/engines/scumm/he/cup_player_he.cpp
@@ -47,7 +47,7 @@ bool CUP_Player::open(const char *filename) {
 	if (_fileStream.open(filename)) {
 		uint32 tag = _fileStream.readUint32BE();
 		_fileStream.readUint32BE();
-		if (tag == MKID_BE('BEAN')) {
+		if (tag == MKTAG('B','E','A','N')) {
 			_playbackRate = kDefaultPlaybackRate;
 			_width = kDefaultVideoWidth;
 			_height = kDefaultVideoHeight;
@@ -168,7 +168,7 @@ void CUP_Player::updateSfx() {
 			assert(sfxIndex >= 0 && sfxIndex < _sfxCount);
 			uint32 offset = READ_LE_UINT32(_sfxBuffer + sfxIndex * 4) - 8;
 			uint8 *soundData = _sfxBuffer + offset;
-			if (READ_BE_UINT32(soundData) == MKID_BE('DATA')) {
+			if (READ_BE_UINT32(soundData) == MKTAG('D','A','T','A')) {
 				uint32 soundSize = READ_BE_UINT32(soundData + 4);
 				_mixer->playStream(Audio::Mixer::kSFXSoundType, &sfxChannel->handle,
 							Audio::makeLoopingAudioStream(
@@ -208,19 +208,19 @@ bool CUP_Player::parseNextHeaderTag(Common::SeekableReadStream &dataStream) {
 	uint32 next = dataStream.pos() + size;
 	debug(1, "New header tag %s %d dataSize %d", tag2str(tag), size, _dataSize);
 	switch (tag) {
-	case MKID_BE('HEAD'):
+	case MKTAG('H','E','A','D'):
 		handleHEAD(dataStream, size);
 		break;
-	case MKID_BE('SFXB'):
+	case MKTAG('S','F','X','B'):
 		handleSFXB(dataStream, size);
 		break;
-	case MKID_BE('RGBS'):
+	case MKTAG('R','G','B','S'):
 		handleRGBS(dataStream, size);
 		break;
-	case MKID_BE('DATA'):
+	case MKTAG('D','A','T','A'):
 		_dataSize = size;
 		return false;
-	case MKID_BE('GFXB'):
+	case MKTAG('G','F','X','B'):
 		// this is never triggered
 	default:
 		warning("Unhandled tag %s", tag2str(tag));
@@ -236,34 +236,34 @@ bool CUP_Player::parseNextBlockTag(Common::SeekableReadStream &dataStream) {
 	uint32 next = dataStream.pos() + size;
 	debug(1, "New block tag %s %d dataSize %d", tag2str(tag), size, _dataSize);
 	switch (tag) {
-	case MKID_BE('FRAM'):
+	case MKTAG('F','R','A','M'):
 		handleFRAM(dataStream, size);
 		break;
-	case MKID_BE('LZSS'):
+	case MKTAG('L','Z','S','S'):
 		if (handleLZSS(dataStream, size) && _outLzssBufSize != 0) {
 			Common::MemoryReadStream memoryStream(_outLzssBufData, _outLzssBufSize);
 			parseNextBlockTag(memoryStream);
 		}
 		break;
-	case MKID_BE('RATE'):
+	case MKTAG('R','A','T','E'):
 		handleRATE(dataStream, size);
 		break;
-	case MKID_BE('RGBS'):
+	case MKTAG('R','G','B','S'):
 		handleRGBS(dataStream, size);
 		break;
-	case MKID_BE('SNDE'):
+	case MKTAG('S','N','D','E'):
 		handleSNDE(dataStream, size);
 		break;
-	case MKID_BE('TOIL'):
+	case MKTAG('T','O','I','L'):
 		handleTOIL(dataStream, size);
 		break;
-	case MKID_BE('SRLE'):
+	case MKTAG('S','R','L','E'):
 		handleSRLE(dataStream, size);
 		break;
-	case MKID_BE('BLOK'):
+	case MKTAG('B','L','O','K'):
 		_dataSize -= size + 8;
 		return false;
-	case MKID_BE('WRLE'):
+	case MKTAG('W','R','L','E'):
 		// this is never triggered
 	default:
 		warning("Unhandled tag %s", tag2str(tag));
@@ -283,10 +283,10 @@ void CUP_Player::handleSFXB(Common::SeekableReadStream &dataStream, uint32 dataS
 	if (dataSize > 16) { // WRAP and OFFS chunks
 		uint32 tag = dataStream.readUint32BE();
 		uint32 size = dataStream.readUint32BE();
-		if (tag == MKID_BE('WRAP')) {
+		if (tag == MKTAG('W','R','A','P')) {
 			tag = dataStream.readUint32BE();
 			size = dataStream.readUint32BE();
-			if (tag == MKID_BE('OFFS')) {
+			if (tag == MKTAG('O','F','F','S')) {
 				_sfxCount = (size - 8) / 4;
 				_sfxBuffer = (uint8 *)malloc(dataSize - 16);
 				if (_sfxBuffer) {
@@ -439,12 +439,12 @@ static void decodeLZSS(uint8 *dst, const uint8 *src1, const uint8 *src2, const u
 bool CUP_Player::handleLZSS(Common::SeekableReadStream &dataStream, uint32 dataSize) {
 	uint32 tag = dataStream.readUint32BE();
 	uint32 size = dataStream.readUint32BE();
-	if (tag == MKID_BE('LZHD')) {
+	if (tag == MKTAG('L','Z','H','D')) {
 		uint32 compressionType = dataStream.readUint32LE();
 		uint32 compressionSize = dataStream.readUint32LE();
 		tag = dataStream.readUint32BE();
 		size = dataStream.readUint32BE();
-		if (tag == MKID_BE('DATA') && compressionType == 0x2000) {
+		if (tag == MKTAG('D','A','T','A') && compressionType == 0x2000) {
 			if (_inLzssBufSize < size - 16) {
 				free(_inLzssBufData);
 				_inLzssBufSize = size - 16;
diff --git a/engines/scumm/he/floodfill_he.cpp b/engines/scumm/he/floodfill_he.cpp
index 491b91c17e..026a848828 100644
--- a/engines/scumm/he/floodfill_he.cpp
+++ b/engines/scumm/he/floodfill_he.cpp
@@ -240,7 +240,7 @@ void Wiz::fillWizFlood(const WizParameters *params) {
 			if (params->processFlags & kWPFNewState) {
 				state = params->img.state;
 			}
-			uint8 *wizh = _vm->findWrappedBlock(MKID_BE('WIZH'), dataPtr, state, 0);
+			uint8 *wizh = _vm->findWrappedBlock(MKTAG('W','I','Z','H'), dataPtr, state, 0);
 			assert(wizh);
 			int c = READ_LE_UINT32(wizh + 0x0);
 			int w = READ_LE_UINT32(wizh + 0x4);
@@ -258,7 +258,7 @@ void Wiz::fillWizFlood(const WizParameters *params) {
 				color = params->fillColor;
 			}
 			if (imageRect.contains(px, py)) {
-				uint8 *wizd = _vm->findWrappedBlock(MKID_BE('WIZD'), dataPtr, state, 0);
+				uint8 *wizd = _vm->findWrappedBlock(MKTAG('W','I','Z','D'), dataPtr, state, 0);
 				assert(wizd);
 
 				FloodFillState *ffs = new FloodFillState;
diff --git a/engines/scumm/he/palette_he.cpp b/engines/scumm/he/palette_he.cpp
index b42d6e97e2..7f517c56ed 100644
--- a/engines/scumm/he/palette_he.cpp
+++ b/engines/scumm/he/palette_he.cpp
@@ -192,7 +192,7 @@ void ScummEngine_v90he::setHEPaletteFromCostume(int palSlot, int resId) {
 	assertRange(1, palSlot, _numPalettes, "palette");
 	const uint8 *data = getResourceAddress(rtCostume, resId);
 	assert(data);
-	const uint8 *rgbs = findResourceData(MKID_BE('RGBS'), data);
+	const uint8 *rgbs = findResourceData(MKTAG('R','G','B','S'), data);
 	assert(rgbs);
 	setHEPaletteFromPtr(palSlot, rgbs);
 }
@@ -202,7 +202,7 @@ void ScummEngine_v90he::setHEPaletteFromImage(int palSlot, int resId, int state)
 	assertRange(1, palSlot, _numPalettes, "palette");
 	uint8 *data = getResourceAddress(rtImage, resId);
 	assert(data);
-	const uint8 *rgbs = findWrappedBlock(MKID_BE('RGBS'), data, state, 0);
+	const uint8 *rgbs = findWrappedBlock(MKTAG('R','G','B','S'), data, state, 0);
 	if (rgbs)
 		setHEPaletteFromPtr(palSlot, rgbs);
 }
@@ -212,7 +212,7 @@ void ScummEngine_v90he::setHEPaletteFromRoom(int palSlot, int resId, int state)
 	assertRange(1, palSlot, _numPalettes, "palette");
 	const uint8 *data = getResourceAddress(rtRoom, resId);
 	assert(data);
-	const uint8 *pals = findResourceData(MKID_BE('PALS'), data);
+	const uint8 *pals = findResourceData(MKTAG('P','A','L','S'), data);
 	assert(pals);
 	const uint8 *rgbs = findPalInPals(pals, state);
 	assert(rgbs);
diff --git a/engines/scumm/he/resource_he.cpp b/engines/scumm/he/resource_he.cpp
index 9349e70eb9..ecb094f29b 100644
--- a/engines/scumm/he/resource_he.cpp
+++ b/engines/scumm/he/resource_he.cpp
@@ -332,7 +332,7 @@ int ScummEngine_v72he::getSoundResourceSize(int id) {
 		if (!ptr)
 			return 0;
 
-		if (READ_BE_UINT32(ptr) == MKID_BE('RIFF')) {
+		if (READ_BE_UINT32(ptr) == MKTAG('R','I','F','F')) {
 			byte flags;
 			int rate;
 
@@ -344,11 +344,11 @@ int ScummEngine_v72he::getSoundResourceSize(int id) {
 			}
 		} else {
 			ptr += 8 + READ_BE_UINT32(ptr + 12);
-			if (READ_BE_UINT32(ptr) == MKID_BE('SBNG')) {
+			if (READ_BE_UINT32(ptr) == MKTAG('S','B','N','G')) {
 				ptr += READ_BE_UINT32(ptr + 4);
 			}
 
-			assert(READ_BE_UINT32(ptr) == MKID_BE('SDAT'));
+			assert(READ_BE_UINT32(ptr) == MKTAG('S','D','A','T'));
 			size = READ_BE_UINT32(ptr + 4) - 8;
 		}
 	}
diff --git a/engines/scumm/he/script_v100he.cpp b/engines/scumm/he/script_v100he.cpp
index ca4a65ac74..69063a1837 100644
--- a/engines/scumm/he/script_v100he.cpp
+++ b/engines/scumm/he/script_v100he.cpp
@@ -2999,7 +2999,7 @@ void ScummEngine_v100he::decodeParseString(int m, int n) {
 	case 78:
 		{
 		byte *dataPtr = getResourceAddress(rtTalkie, pop());
-		byte *text = findWrappedBlock(MKID_BE('TEXT'), dataPtr, 0, 0);
+		byte *text = findWrappedBlock(MKTAG('T','E','X','T'), dataPtr, 0, 0);
 		size = getResourceDataSize(text);
 		memcpy(name, text, size);
 		printString(m, name);
diff --git a/engines/scumm/he/script_v71he.cpp b/engines/scumm/he/script_v71he.cpp
index 46a8868949..a800a7d85c 100644
--- a/engines/scumm/he/script_v71he.cpp
+++ b/engines/scumm/he/script_v71he.cpp
@@ -88,15 +88,15 @@ byte *ScummEngine_v71he::heFindResource(uint32 tag, byte *searchin) {
 }
 
 byte *ScummEngine_v71he::findWrappedBlock(uint32 tag, byte *ptr, int state, bool errorFlag) {
-	if (READ_BE_UINT32(ptr) == MKID_BE('MULT')) {
+	if (READ_BE_UINT32(ptr) == MKTAG('M','U','L','T')) {
 		byte *offs, *wrap;
 		uint32 size;
 
-		wrap = heFindResource(MKID_BE('WRAP'), ptr);
+		wrap = heFindResource(MKTAG('W','R','A','P'), ptr);
 		if (wrap == NULL)
 			return NULL;
 
-		offs = heFindResourceData(MKID_BE('OFFS'), wrap);
+		offs = heFindResourceData(MKTAG('O','F','F','S'), wrap);
 		if (offs == NULL)
 			return NULL;
 
@@ -109,7 +109,7 @@ byte *ScummEngine_v71he::findWrappedBlock(uint32 tag, byte *ptr, int state, bool
 		if (offs)
 			return offs;
 
-		offs = heFindResourceData(MKID_BE('DEFA'), ptr);
+		offs = heFindResourceData(MKTAG('D','E','F','A'), ptr);
 		if (offs == NULL)
 			return NULL;
 
diff --git a/engines/scumm/he/script_v72he.cpp b/engines/scumm/he/script_v72he.cpp
index 8aaf16e81b..17bd29d826 100644
--- a/engines/scumm/he/script_v72he.cpp
+++ b/engines/scumm/he/script_v72he.cpp
@@ -2039,7 +2039,7 @@ void ScummEngine_v72he::decodeParseString(int m, int n) {
 	case 0xE1:
 		{
 		byte *dataPtr = getResourceAddress(rtTalkie, pop());
-		byte *text = findWrappedBlock(MKID_BE('TEXT'), dataPtr, 0, 0);
+		byte *text = findWrappedBlock(MKTAG('T','E','X','T'), dataPtr, 0, 0);
 		size = getResourceDataSize(text);
 		memcpy(name, text, size);
 		printString(m, name);
diff --git a/engines/scumm/he/sound_he.cpp b/engines/scumm/he/sound_he.cpp
index 4770f28cbc..4fd7caebf5 100644
--- a/engines/scumm/he/sound_he.cpp
+++ b/engines/scumm/he/sound_he.cpp
@@ -499,11 +499,11 @@ byte *findSoundTag(uint32 tag, byte *ptr) {
 	byte *endPtr;
 	uint32 offset, size;
 
-	if (READ_BE_UINT32(ptr) == MKID_BE('WSOU')) {
+	if (READ_BE_UINT32(ptr) == MKTAG('W','S','O','U')) {
 		ptr += 8;
 	}
 
-	if (READ_BE_UINT32(ptr) != MKID_BE('RIFF'))
+	if (READ_BE_UINT32(ptr) != MKTAG('R','I','F','F'))
 		return NULL;
 
 	endPtr = (ptr + 12);
@@ -591,14 +591,14 @@ void SoundHE::playHESound(int soundID, int heOffset, int heChannel, int heFlags)
 	}
 
 	// Support for sound in later HE games
-	if (READ_BE_UINT32(ptr) == MKID_BE('RIFF') || READ_BE_UINT32(ptr) == MKID_BE('WSOU')) {
+	if (READ_BE_UINT32(ptr) == MKTAG('R','I','F','F') || READ_BE_UINT32(ptr) == MKTAG('W','S','O','U')) {
 		uint16 compType;
 		int blockAlign;
 		int codeOffs = -1;
 
 		priority = (soundID > _vm->_numSounds) ? 255 : *(ptr + 18);
 
-		byte *sbngPtr = findSoundTag(MKID_BE('SBNG'), ptr);
+		byte *sbngPtr = findSoundTag(MKTAG('S','B','N','G'), ptr);
 		if (sbngPtr != NULL) {
 			codeOffs = sbngPtr - ptr + 8;
 		}
@@ -611,7 +611,7 @@ void SoundHE::playHESound(int soundID, int heOffset, int heChannel, int heFlags)
 				return;
 		}
 
-		if (READ_BE_UINT32(ptr) == MKID_BE('WSOU'))
+		if (READ_BE_UINT32(ptr) == MKTAG('W','S','O','U'))
 			ptr += 8;
 
 		size = READ_LE_UINT32(ptr + 4);
@@ -675,7 +675,7 @@ void SoundHE::playHESound(int soundID, int heOffset, int heChannel, int heFlags)
 						Audio::makeLoopingAudioStream(stream, (heFlags & 1) ? 0 : 1), soundID);
 	}
 	// Support for sound in Humongous Entertainment games
-	else if (READ_BE_UINT32(ptr) == MKID_BE('DIGI') || READ_BE_UINT32(ptr) == MKID_BE('TALK')) {
+	else if (READ_BE_UINT32(ptr) == MKTAG('D','I','G','I') || READ_BE_UINT32(ptr) == MKTAG('T','A','L','K')) {
 		byte *sndPtr = ptr;
 		int codeOffs = -1;
 
@@ -693,12 +693,12 @@ void SoundHE::playHESound(int soundID, int heOffset, int heChannel, int heFlags)
 				return;
 		}
 
-		if (READ_BE_UINT32(ptr) == MKID_BE('SBNG')) {
+		if (READ_BE_UINT32(ptr) == MKTAG('S','B','N','G')) {
 			codeOffs = ptr - sndPtr + 8;
 			ptr += READ_BE_UINT32(ptr + 4);
 		}
 
-		assert(READ_BE_UINT32(ptr) == MKID_BE('SDAT'));
+		assert(READ_BE_UINT32(ptr) == MKTAG('S','D','A','T'));
 		size = READ_BE_UINT32(ptr + 4) - 8;
 		if (heOffset < 0 || heOffset > size) {
 			// Occurs when making fireworks in puttmoon
@@ -734,14 +734,14 @@ void SoundHE::playHESound(int soundID, int heOffset, int heChannel, int heFlags)
 						Audio::makeLoopingAudioStream(stream, (heFlags & 1) ? 0 : 1), soundID);
 	}
 	// Support for PCM music in 3DO versions of Humongous Entertainment games
-	else if (READ_BE_UINT32(ptr) == MKID_BE('MRAW')) {
+	else if (READ_BE_UINT32(ptr) == MKTAG('M','R','A','W')) {
 		priority = *(ptr + 18);
 		rate = READ_LE_UINT16(ptr + 22);
 
 		// Skip DIGI (8) and HSHD (24) blocks
 		ptr += 32;
 
-		assert(READ_BE_UINT32(ptr) == MKID_BE('SDAT'));
+		assert(READ_BE_UINT32(ptr) == MKTAG('S','D','A','T'));
 		size = READ_BE_UINT32(ptr + 4) - 8;
 
 		byte *sound = (byte *)malloc(size);
@@ -753,7 +753,7 @@ void SoundHE::playHESound(int soundID, int heOffset, int heChannel, int heFlags)
 		stream = Audio::makeRawStream(sound, size, rate, 0);
 		_mixer->playStream(Audio::Mixer::kMusicSoundType, NULL, stream, soundID);
 	}
-	else if (READ_BE_UINT32(ptr) == MKID_BE('MIDI')) {
+	else if (READ_BE_UINT32(ptr) == MKTAG('M','I','D','I')) {
 		if (_vm->_imuse) {
 			// This is used in the DOS version of Fatty Bear's
 			// Birthday Surprise to change the note on the piano
@@ -833,9 +833,9 @@ void ScummEngine_v80he::createSound(int snd1id, int snd2id) {
 			chan =  i;
 	}
 
-	if (!findSoundTag(MKID_BE('data'), snd1Ptr)) {
-		sbng1Ptr = heFindResource(MKID_BE('SBNG'), snd1Ptr);
-		sbng2Ptr = heFindResource(MKID_BE('SBNG'), snd2Ptr);
+	if (!findSoundTag(MKTAG('d','a','t','a'), snd1Ptr)) {
+		sbng1Ptr = heFindResource(MKTAG('S','B','N','G'), snd1Ptr);
+		sbng2Ptr = heFindResource(MKTAG('S','B','N','G'), snd2Ptr);
 	}
 
 	if (sbng1Ptr != NULL && sbng2Ptr != NULL) {
@@ -879,10 +879,10 @@ void ScummEngine_v80he::createSound(int snd1id, int snd2id) {
 		}
 	}
 
-	if (findSoundTag(MKID_BE('data'), snd1Ptr)) {
-		sdat1Ptr = findSoundTag(MKID_BE('data'), snd1Ptr);
+	if (findSoundTag(MKTAG('d','a','t','a'), snd1Ptr)) {
+		sdat1Ptr = findSoundTag(MKTAG('d','a','t','a'), snd1Ptr);
 		assert(sdat1Ptr);
-		sdat2Ptr = findSoundTag(MKID_BE('data'), snd2Ptr);
+		sdat2Ptr = findSoundTag(MKTAG('d','a','t','a'), snd2Ptr);
 		assert(sdat2Ptr);
 
 		if (!_sndDataSize)
@@ -890,9 +890,9 @@ void ScummEngine_v80he::createSound(int snd1id, int snd2id) {
 
 		sdat2size = READ_LE_UINT32(sdat2Ptr + 4) - 8;
 	} else {
-		sdat1Ptr = heFindResource(MKID_BE('SDAT'), snd1Ptr);
+		sdat1Ptr = heFindResource(MKTAG('S','D','A','T'), snd1Ptr);
 		assert(sdat1Ptr);
-		sdat2Ptr = heFindResource(MKID_BE('SDAT'), snd2Ptr);
+		sdat2Ptr = heFindResource(MKTAG('S','D','A','T'), snd2Ptr);
 		assert(sdat2Ptr);
 
 		_sndDataSize = READ_BE_UINT32(sdat1Ptr + 4) - 8;
diff --git a/engines/scumm/he/wiz_he.cpp b/engines/scumm/he/wiz_he.cpp
index 3d1aa5b048..16cbadd65b 100644
--- a/engines/scumm/he/wiz_he.cpp
+++ b/engines/scumm/he/wiz_he.cpp
@@ -1445,21 +1445,21 @@ uint8 *Wiz::drawWizImage(int resNum, int state, int maskNum, int maskState, int
 	if (shadow) {
 		dataPtr = _vm->getResourceAddress(rtImage, shadow);
 		assert(dataPtr);
-		xmapPtr = _vm->findResourceData(MKID_BE('XMAP'), dataPtr);
+		xmapPtr = _vm->findResourceData(MKTAG('X','M','A','P'), dataPtr);
 		assert(xmapPtr);
 	}
 
 	dataPtr = _vm->getResourceAddress(rtImage, resNum);
 	assert(dataPtr);
 
-	uint8 *wizh = _vm->findWrappedBlock(MKID_BE('WIZH'), dataPtr, state, 0);
+	uint8 *wizh = _vm->findWrappedBlock(MKTAG('W','I','Z','H'), dataPtr, state, 0);
 	assert(wizh);
 	uint32 comp   = READ_LE_UINT32(wizh + 0x0);
 	uint32 width  = READ_LE_UINT32(wizh + 0x4);
 	uint32 height = READ_LE_UINT32(wizh + 0x8);
 	debug(3, "wiz_header.comp = %d wiz_header.w = %d wiz_header.h = %d", comp, width, height);
 
-	uint8 *wizd = _vm->findWrappedBlock(MKID_BE('WIZD'), dataPtr, state, 0);
+	uint8 *wizd = _vm->findWrappedBlock(MKTAG('W','I','Z','D'), dataPtr, state, 0);
 	assert(wizd);
 
 	uint8 *mask = NULL;
@@ -1467,28 +1467,28 @@ uint8 *Wiz::drawWizImage(int resNum, int state, int maskNum, int maskState, int
 		uint8 *maskPtr = _vm->getResourceAddress(rtImage, maskNum);
 		assert(maskPtr);
 
-		wizh = _vm->findWrappedBlock(MKID_BE('WIZH'), maskPtr, maskState, 0);
+		wizh = _vm->findWrappedBlock(MKTAG('W','I','Z','H'), maskPtr, maskState, 0);
 		assert(wizh);
 		assert(comp == 2 && READ_LE_UINT32(wizh + 0x0) == 1);
 		width  = READ_LE_UINT32(wizh + 0x4);
 		height = READ_LE_UINT32(wizh + 0x8);
 
-		mask = _vm->findWrappedBlock(MKID_BE('WIZD'), maskPtr, maskState, 0);
+		mask = _vm->findWrappedBlock(MKTAG('W','I','Z','D'), maskPtr, maskState, 0);
 		assert(mask);
 	}
 
 	if (flags & kWIFHasPalette) {
-		uint8 *pal = _vm->findWrappedBlock(MKID_BE('RGBS'), dataPtr, state, 0);
+		uint8 *pal = _vm->findWrappedBlock(MKTAG('R','G','B','S'), dataPtr, state, 0);
 		assert(pal);
 		_vm->setPaletteFromPtr(pal, 256);
 	}
 
 	uint8 *rmap = NULL;
 	if (flags & kWIFRemapPalette) {
-		rmap = _vm->findWrappedBlock(MKID_BE('RMAP'), dataPtr, state, 0);
+		rmap = _vm->findWrappedBlock(MKTAG('R','M','A','P'), dataPtr, state, 0);
 		assert(rmap);
 		if (_vm->_game.heversion <= 80 || READ_BE_UINT32(rmap) != 0x01234567) {
-			uint8 *rgbs = _vm->findWrappedBlock(MKID_BE('RGBS'), dataPtr, state, 0);
+			uint8 *rgbs = _vm->findWrappedBlock(MKTAG('R','G','B','S'), dataPtr, state, 0);
 			assert(rgbs);
 			_vm->remapHEPalette(rgbs, rmap + 4);
 		}
@@ -1526,7 +1526,7 @@ uint8 *Wiz::drawWizImage(int resNum, int state, int maskNum, int maskState, int
 		if (dstResNum) {
 			uint8 *dstPtr = _vm->getResourceAddress(rtImage, dstResNum);
 			assert(dstPtr);
-			dst = _vm->findWrappedBlock(MKID_BE('WIZD'), dstPtr, 0, 0);
+			dst = _vm->findWrappedBlock(MKTAG('W','I','Z','D'), dstPtr, 0, 0);
 			assert(dst);
 			getWizImageDim(dstResNum, 0, cw, ch);
 			dstPitch = cw * _vm->_bytesPerPixel;
@@ -1567,7 +1567,7 @@ uint8 *Wiz::drawWizImage(int resNum, int state, int maskNum, int maskState, int
 
 	int transColor = -1;
 	if (_vm->VAR_WIZ_TCOLOR != 0xFF) {
-		uint8 *trns = _vm->findWrappedBlock(MKID_BE('TRNS'), dataPtr, state, 0);
+		uint8 *trns = _vm->findWrappedBlock(MKTAG('T','R','N','S'), dataPtr, state, 0);
 		transColor = (trns == NULL) ? _vm->VAR(_vm->VAR_WIZ_TCOLOR) : -1;
 	}
 
@@ -1817,7 +1817,7 @@ void Wiz::drawWizPolygonTransform(int resNum, int state, Common::Point *wp, int
 			assert(_vm->_bytesPerPixel == 1);
 			uint8 *dataPtr = _vm->getResourceAddress(rtImage, resNum);
 			assert(dataPtr);
-			srcWizBuf = _vm->findWrappedBlock(MKID_BE('WIZD'), dataPtr, state, 0);
+			srcWizBuf = _vm->findWrappedBlock(MKTAG('W','I','Z','D'), dataPtr, state, 0);
 			assert(srcWizBuf);
 			freeBuffer = false;
 		}
@@ -1827,7 +1827,7 @@ void Wiz::drawWizPolygonTransform(int resNum, int state, Common::Point *wp, int
 		} else {
 			uint8 *dataPtr = _vm->getResourceAddress(rtImage, resNum);
 			assert(dataPtr);
-			srcWizBuf = _vm->findWrappedBlock(MKID_BE('WIZD'), dataPtr, state, 0);
+			srcWizBuf = _vm->findWrappedBlock(MKTAG('W','I','Z','D'), dataPtr, state, 0);
 			assert(srcWizBuf);
 			freeBuffer = false;
 		}
@@ -1842,7 +1842,7 @@ void Wiz::drawWizPolygonTransform(int resNum, int state, Common::Point *wp, int
 	if (dstResNum) {
 		uint8 *dstPtr = _vm->getResourceAddress(rtImage, dstResNum);
 		assert(dstPtr);
-		dst = _vm->findWrappedBlock(MKID_BE('WIZD'), dstPtr, 0, 0);
+		dst = _vm->findWrappedBlock(MKTAG('W','I','Z','D'), dstPtr, 0, 0);
 		assert(dst);
 		getWizImageDim(dstResNum, 0, dstw, dsth);
 		dstpitch = dstw * _vm->_bytesPerPixel;
@@ -2185,7 +2185,7 @@ void Wiz::fillWizRect(const WizParameters *params) {
 	}
 	uint8 *dataPtr = _vm->getResourceAddress(rtImage, params->img.resNum);
 	if (dataPtr) {
-		uint8 *wizh = _vm->findWrappedBlock(MKID_BE('WIZH'), dataPtr, state, 0);
+		uint8 *wizh = _vm->findWrappedBlock(MKTAG('W','I','Z','H'), dataPtr, state, 0);
 		assert(wizh);
 		int c = READ_LE_UINT32(wizh + 0x0);
 		int w = READ_LE_UINT32(wizh + 0x4);
@@ -2210,7 +2210,7 @@ void Wiz::fillWizRect(const WizParameters *params) {
 		}
 		if (areaRect.intersects(imageRect)) {
 			areaRect.clip(imageRect);
-			uint8 *wizd = _vm->findWrappedBlock(MKID_BE('WIZD'), dataPtr, state, 0);
+			uint8 *wizd = _vm->findWrappedBlock(MKTAG('W','I','Z','D'), dataPtr, state, 0);
 			assert(wizd);
 			int dx = areaRect.width();
 			int dy = areaRect.height();
@@ -2256,7 +2256,7 @@ void Wiz::fillWizLine(const WizParameters *params) {
 		}
 		uint8 *dataPtr = _vm->getResourceAddress(rtImage, params->img.resNum);
 		if (dataPtr) {
-			uint8 *wizh = _vm->findWrappedBlock(MKID_BE('WIZH'), dataPtr, state, 0);
+			uint8 *wizh = _vm->findWrappedBlock(MKTAG('W','I','Z','H'), dataPtr, state, 0);
 			assert(wizh);
 			int c = READ_LE_UINT32(wizh + 0x0);
 			int w = READ_LE_UINT32(wizh + 0x4);
@@ -2274,7 +2274,7 @@ void Wiz::fillWizLine(const WizParameters *params) {
 			if (params->processFlags & kWPFFillColor) {
 				color = params->fillColor;
 			}
-			uint8 *wizd = _vm->findWrappedBlock(MKID_BE('WIZD'), dataPtr, state, 0);
+			uint8 *wizd = _vm->findWrappedBlock(MKTAG('W','I','Z','D'), dataPtr, state, 0);
 			assert(wizd);
 			int x1 = params->box2.left;
 			int y1 = params->box2.top;
@@ -2309,7 +2309,7 @@ void Wiz::fillWizPixel(const WizParameters *params) {
 			if (params->processFlags & kWPFNewState) {
 				state = params->img.state;
 			}
-			uint8 *wizh = _vm->findWrappedBlock(MKID_BE('WIZH'), dataPtr, state, 0);
+			uint8 *wizh = _vm->findWrappedBlock(MKTAG('W','I','Z','H'), dataPtr, state, 0);
 			assert(wizh);
 			int c = READ_LE_UINT32(wizh + 0x0);
 			int w = READ_LE_UINT32(wizh + 0x4);
@@ -2327,7 +2327,7 @@ void Wiz::fillWizPixel(const WizParameters *params) {
 				color = params->fillColor;
 			}
 			if (imageRect.contains(px, py)) {
-				uint8 *wizd = _vm->findWrappedBlock(MKID_BE('WIZD'), dataPtr, state, 0);
+				uint8 *wizd = _vm->findWrappedBlock(MKTAG('W','I','Z','D'), dataPtr, state, 0);
 				assert(wizd);
 				*(wizd + py * w + px) = color;
 			}
@@ -2342,7 +2342,7 @@ void Wiz::remapWizImagePal(const WizParameters *params) {
 	const uint8 *index = params->remapIndex;
 	uint8 *iwiz = _vm->getResourceAddress(rtImage, params->img.resNum);
 	assert(iwiz);
-	uint8 *rmap = _vm->findWrappedBlock(MKID_BE('RMAP'), iwiz, st, 0);
+	uint8 *rmap = _vm->findWrappedBlock(MKTAG('R','M','A','P'), iwiz, st, 0);
 	assert(rmap);
 	WRITE_BE_UINT32(rmap, 0x01234567);
 	while (num--) {
@@ -2380,7 +2380,7 @@ void Wiz::processWizImage(const WizParameters *params) {
 
 			if (f) {
 				uint32 id = f->readUint32BE();
-				if (id == MKID_BE('AWIZ') || id == MKID_BE('MULT')) {
+				if (id == MKTAG('A','W','I','Z') || id == MKTAG('M','U','L','T')) {
 					uint32 size = f->readUint32BE();
 					f->seek(0, SEEK_SET);
 					byte *p = _vm->_res->createResource(rtImage, params->img.resNum, size);
@@ -2510,7 +2510,7 @@ void Wiz::processWizImage(const WizParameters *params) {
 void Wiz::getWizImageDim(int resNum, int state, int32 &w, int32 &h) {
 	uint8 *dataPtr = _vm->getResourceAddress(rtImage, resNum);
 	assert(dataPtr);
-	uint8 *wizh = _vm->findWrappedBlock(MKID_BE('WIZH'), dataPtr, state, 0);
+	uint8 *wizh = _vm->findWrappedBlock(MKTAG('W','I','Z','H'), dataPtr, state, 0);
 	assert(wizh);
 	w = READ_LE_UINT32(wizh + 0x4);
 	h = READ_LE_UINT32(wizh + 0x8);
@@ -2519,7 +2519,7 @@ void Wiz::getWizImageDim(int resNum, int state, int32 &w, int32 &h) {
 void Wiz::getWizImageSpot(int resId, int state, int32 &x, int32 &y) {
 	uint8 *dataPtr = _vm->getResourceAddress(rtImage, resId);
 	assert(dataPtr);
-	uint8 *spotPtr = _vm->findWrappedBlock(MKID_BE('SPOT'), dataPtr, state, 0);
+	uint8 *spotPtr = _vm->findWrappedBlock(MKTAG('S','P','O','T'), dataPtr, state, 0);
 	if (spotPtr) {
 		x = READ_LE_UINT32(spotPtr + 0);
 		y = READ_LE_UINT32(spotPtr + 4);
@@ -2537,17 +2537,17 @@ int Wiz::getWizImageData(int resNum, int state, int type) {
 
 	switch (type) {
 	case 0:
-		wizh = _vm->findWrappedBlock(MKID_BE('WIZH'), dataPtr, state, 0);
+		wizh = _vm->findWrappedBlock(MKTAG('W','I','Z','H'), dataPtr, state, 0);
 		assert(wizh);
 		return READ_LE_UINT32(wizh + 0x0);
 	case 1:
-		return (_vm->findWrappedBlock(MKID_BE('RGBS'), dataPtr, state, 0) != NULL) ? 1 : 0;
+		return (_vm->findWrappedBlock(MKTAG('R','G','B','S'), dataPtr, state, 0) != NULL) ? 1 : 0;
 	case 2:
-		return (_vm->findWrappedBlock(MKID_BE('RMAP'), dataPtr, state, 0) != NULL) ? 1 : 0;
+		return (_vm->findWrappedBlock(MKTAG('R','M','A','P'), dataPtr, state, 0) != NULL) ? 1 : 0;
 	case 3:
-		return (_vm->findWrappedBlock(MKID_BE('TRNS'), dataPtr, state, 0) != NULL) ? 1 : 0;
+		return (_vm->findWrappedBlock(MKTAG('T','R','N','S'), dataPtr, state, 0) != NULL) ? 1 : 0;
 	case 4:
-		return (_vm->findWrappedBlock(MKID_BE('XMAP'), dataPtr, state, 0) != NULL) ? 1 : 0;
+		return (_vm->findWrappedBlock(MKTAG('X','M','A','P'), dataPtr, state, 0) != NULL) ? 1 : 0;
 	default:
 		error("getWizImageData: Unknown type %d", type);
 	}
@@ -2556,14 +2556,14 @@ int Wiz::getWizImageData(int resNum, int state, int type) {
 int Wiz::getWizImageStates(int resNum) {
 	const uint8 *dataPtr = _vm->getResourceAddress(rtImage, resNum);
 	assert(dataPtr);
-	if (READ_BE_UINT32(dataPtr) == MKID_BE('MULT')) {
+	if (READ_BE_UINT32(dataPtr) == MKTAG('M','U','L','T')) {
 		const byte *offs, *wrap;
 
-		wrap = _vm->findResource(MKID_BE('WRAP'), dataPtr);
+		wrap = _vm->findResource(MKTAG('W','R','A','P'), dataPtr);
 		if (wrap == NULL)
 			return 1;
 
-		offs = _vm->findResourceData(MKID_BE('OFFS'), wrap);
+		offs = _vm->findResourceData(MKTAG('O','F','F','S'), wrap);
 		if (offs == NULL)
 			return 1;
 
@@ -2577,12 +2577,12 @@ int Wiz::isWizPixelNonTransparent(int resNum, int state, int x, int y, int flags
 	int ret = 0;
 	uint8 *data = _vm->getResourceAddress(rtImage, resNum);
 	assert(data);
-	uint8 *wizh = _vm->findWrappedBlock(MKID_BE('WIZH'), data, state, 0);
+	uint8 *wizh = _vm->findWrappedBlock(MKTAG('W','I','Z','H'), data, state, 0);
 	assert(wizh);
 	int c = READ_LE_UINT32(wizh + 0x0);
 	int w = READ_LE_UINT32(wizh + 0x4);
 	int h = READ_LE_UINT32(wizh + 0x8);
-	uint8 *wizd = _vm->findWrappedBlock(MKID_BE('WIZD'), data, state, 0);
+	uint8 *wizd = _vm->findWrappedBlock(MKTAG('W','I','Z','D'), data, state, 0);
 	assert(wizd);
 	if (x >= 0 && x < w && y >= 0 && y < h) {
 		if (flags & kWIFFlipX) {
@@ -2627,12 +2627,12 @@ uint16 Wiz::getWizPixelColor(int resNum, int state, int x, int y) {
 	uint16 color = 0;
 	uint8 *data = _vm->getResourceAddress(rtImage, resNum);
 	assert(data);
-	uint8 *wizh = _vm->findWrappedBlock(MKID_BE('WIZH'), data, state, 0);
+	uint8 *wizh = _vm->findWrappedBlock(MKTAG('W','I','Z','H'), data, state, 0);
 	assert(wizh);
 	int c = READ_LE_UINT32(wizh + 0x0);
 	int w = READ_LE_UINT32(wizh + 0x4);
 	int h = READ_LE_UINT32(wizh + 0x8);
-	uint8 *wizd = _vm->findWrappedBlock(MKID_BE('WIZD'), data, state, 0);
+	uint8 *wizd = _vm->findWrappedBlock(MKTAG('W','I','Z','D'), data, state, 0);
 	assert(wizd);
 	switch (c) {
 	case 0:
@@ -2671,13 +2671,13 @@ int ScummEngine_v90he::computeWizHistogram(int resNum, int state, int x, int y,
 		Common::Rect rCapt(x, y, w + 1, h + 1);
 		uint8 *data = getResourceAddress(rtImage, resNum);
 		assert(data);
-		uint8 *wizh = findWrappedBlock(MKID_BE('WIZH'), data, state, 0);
+		uint8 *wizh = findWrappedBlock(MKTAG('W','I','Z','H'), data, state, 0);
 		assert(wizh);
 		int c = READ_LE_UINT32(wizh + 0x0);
 		w = READ_LE_UINT32(wizh + 0x4);
 		h = READ_LE_UINT32(wizh + 0x8);
 		Common::Rect rWiz(w, h);
-		uint8 *wizd = findWrappedBlock(MKID_BE('WIZD'), data, state, 0);
+		uint8 *wizd = findWrappedBlock(MKTAG('W','I','Z','D'), data, state, 0);
 		assert(wizd);
 		if (rCapt.intersects(rWiz)) {
 			rCapt.clip(rWiz);
diff --git a/engines/scumm/imuse/imuse.cpp b/engines/scumm/imuse/imuse.cpp
index 6c626cdf4e..07fd99c809 100644
--- a/engines/scumm/imuse/imuse.cpp
+++ b/engines/scumm/imuse/imuse.cpp
@@ -150,22 +150,22 @@ bool IMuseInternal::isMT32(int sound) {
 
 	tag = READ_BE_UINT32(ptr + 4);
 	switch (tag) {
-	case MKID_BE('ADL '):
-	case MKID_BE('ASFX'): // Special AD class for old AdLib sound effects
-	case MKID_BE('SPK '):
+	case MKTAG('A','D','L',' '):
+	case MKTAG('A','S','F','X'): // Special AD class for old AdLib sound effects
+	case MKTAG('S','P','K',' '):
 		return false;
 
-	case MKID_BE('AMI '):
-	case MKID_BE('ROL '):
+	case MKTAG('A','M','I',' '):
+	case MKTAG('R','O','L',' '):
 		return true;
 
-	case MKID_BE('MAC '):	// Occurs in the Mac version of FOA and MI2
+	case MKTAG('M','A','C',' '):	// Occurs in the Mac version of FOA and MI2
 		return true;
 
-	case MKID_BE('GMD '):
+	case MKTAG('G','M','D',' '):
 		return false;
 
-	case MKID_BE('MIDI'):	// Occurs in Sam & Max
+	case MKTAG('M','I','D','I'):	// Occurs in Sam & Max
 		// HE games use Roland music
 		if (ptr[12] == 'H' && ptr[13] == 'S')
 			return true;
@@ -197,20 +197,20 @@ bool IMuseInternal::isMIDI(int sound) {
 
 	tag = READ_BE_UINT32(ptr + 4);
 	switch (tag) {
-	case MKID_BE('ADL '):
-	case MKID_BE('ASFX'): // Special AD class for old AdLib sound effects
-	case MKID_BE('SPK '):
+	case MKTAG('A','D','L',' '):
+	case MKTAG('A','S','F','X'): // Special AD class for old AdLib sound effects
+	case MKTAG('S','P','K',' '):
 		return false;
 
-	case MKID_BE('AMI '):
-	case MKID_BE('ROL '):
+	case MKTAG('A','M','I',' '):
+	case MKTAG('R','O','L',' '):
 		return true;
 
-	case MKID_BE('MAC '):	// Occurs in the Mac version of FOA and MI2
+	case MKTAG('M','A','C',' '):	// Occurs in the Mac version of FOA and MI2
 		return true;
 
-	case MKID_BE('GMD '):
-	case MKID_BE('MIDI'):	// Occurs in Sam & Max
+	case MKTAG('G','M','D',' '):
+	case MKTAG('M','I','D','I'):	// Occurs in Sam & Max
 		return true;
 	}
 
diff --git a/engines/scumm/imuse_digi/dimuse_bndmgr.cpp b/engines/scumm/imuse_digi/dimuse_bndmgr.cpp
index f10f17f3d8..1e526aa6d1 100644
--- a/engines/scumm/imuse_digi/dimuse_bndmgr.cpp
+++ b/engines/scumm/imuse_digi/dimuse_bndmgr.cpp
@@ -92,7 +92,7 @@ int BundleDirCache::matchFile(const char *filename) {
 			error("BundleDirCache::matchFileFile() Can't find free slot for file bundle dir cache");
 
 		tag = file.readUint32BE();
-		if (tag == MKID_BE('LB23'))
+		if (tag == MKTAG('L','B','2','3'))
 			_budleDirCache[freeSlot].isCompressed = true;
 		offset = file.readUint32BE();
 
@@ -112,7 +112,7 @@ int BundleDirCache::matchFile(const char *filename) {
 			int32 z = 0;
 			int32 z2;
 
-			if (tag == MKID_BE('LB23')) {
+			if (tag == MKTAG('L','B','2','3')) {
 				file.read(_budleDirCache[freeSlot].bundleTable[i].filename, 24);
 			} else {
 				for (z2 = 0; z2 < 8; z2++)
@@ -224,7 +224,7 @@ bool BundleMgr::loadCompTable(int32 index) {
 	assert(_numCompItems > 0);
 	_file->seek(8, SEEK_CUR);
 
-	if (tag != MKID_BE('COMP')) {
+	if (tag != MKTAG('C','O','M','P')) {
 		error("BundleMgr::loadCompTable() Compressed sound %d (%s:%d) invalid (%s)", index, _file->getName(), _bundleTable[index].offset, tag2str(tag));
 		return false;
 	}
diff --git a/engines/scumm/imuse_digi/dimuse_sndmgr.cpp b/engines/scumm/imuse_digi/dimuse_sndmgr.cpp
index 00074a951a..3fcfc62810 100644
--- a/engines/scumm/imuse_digi/dimuse_sndmgr.cpp
+++ b/engines/scumm/imuse_digi/dimuse_sndmgr.cpp
@@ -65,32 +65,32 @@ void ImuseDigiSndMgr::countElements(byte *ptr, int &numRegions, int &numJumps, i
 	do {
 		tag = READ_BE_UINT32(ptr); ptr += 4;
 		switch (tag) {
-		case MKID_BE('STOP'):
-		case MKID_BE('FRMT'):
-		case MKID_BE('DATA'):
+		case MKTAG('S','T','O','P'):
+		case MKTAG('F','R','M','T'):
+		case MKTAG('D','A','T','A'):
 			size = READ_BE_UINT32(ptr); ptr += size + 4;
 			break;
-		case MKID_BE('TEXT'):
+		case MKTAG('T','E','X','T'):
 			if (!scumm_stricmp((const char *)(ptr + 8), "exit"))
 				numMarkers++;
 			size = READ_BE_UINT32(ptr); ptr += size + 4;
 			break;
-		case MKID_BE('REGN'):
+		case MKTAG('R','E','G','N'):
 			numRegions++;
 			size = READ_BE_UINT32(ptr); ptr += size + 4;
 			break;
-		case MKID_BE('JUMP'):
+		case MKTAG('J','U','M','P'):
 			numJumps++;
 			size = READ_BE_UINT32(ptr); ptr += size + 4;
 			break;
-		case MKID_BE('SYNC'):
+		case MKTAG('S','Y','N','C'):
 			numSyncs++;
 			size = READ_BE_UINT32(ptr); ptr += size + 4;
 			break;
 		default:
 			error("ImuseDigiSndMgr::countElements() Unknown sfx header '%s'", tag2str(tag));
 		}
-	} while (tag != MKID_BE('DATA'));
+	} while (tag != MKTAG('D','A','T','A'));
 }
 
 void ImuseDigiSndMgr::prepareSoundFromRMAP(Common::SeekableReadStream *file, SoundDesc *sound, int32 offset, int32 size) {
@@ -98,7 +98,7 @@ void ImuseDigiSndMgr::prepareSoundFromRMAP(Common::SeekableReadStream *file, Sou
 
 	file->seek(offset, SEEK_SET);
 	uint32 tag = file->readUint32BE();
-	assert(tag == MKID_BE('RMAP'));
+	assert(tag == MKTAG('R','M','A','P'));
 	int32 version = file->readUint32BE();
 	if (version != 3) {
 		if (version == 2) {
@@ -153,7 +153,7 @@ void ImuseDigiSndMgr::prepareSoundFromRMAP(Common::SeekableReadStream *file, Sou
 }
 
 void ImuseDigiSndMgr::prepareSound(byte *ptr, SoundDesc *sound) {
-	if (READ_BE_UINT32(ptr) == MKID_BE('Crea')) {
+	if (READ_BE_UINT32(ptr) == MKTAG('C','r','e','a')) {
 		bool quit = false;
 		int len;
 
@@ -222,7 +222,7 @@ void ImuseDigiSndMgr::prepareSound(byte *ptr, SoundDesc *sound) {
 			}
 			offset += len;
 		}
-	} else if (READ_BE_UINT32(ptr) == MKID_BE('iMUS')) {
+	} else if (READ_BE_UINT32(ptr) == MKTAG('i','M','U','S')) {
 		uint32 tag;
 		int32 size = 0;
 		byte *s_ptr = ptr;
@@ -250,13 +250,13 @@ void ImuseDigiSndMgr::prepareSound(byte *ptr, SoundDesc *sound) {
 		do {
 			tag = READ_BE_UINT32(ptr); ptr += 4;
 			switch (tag) {
-			case MKID_BE('FRMT'):
+			case MKTAG('F','R','M','T'):
 				ptr += 12;
 				sound->bits = READ_BE_UINT32(ptr); ptr += 4;
 				sound->freq = READ_BE_UINT32(ptr); ptr += 4;
 				sound->channels = READ_BE_UINT32(ptr); ptr += 4;
 				break;
-			case MKID_BE('TEXT'):
+			case MKTAG('T','E','X','T'):
 				if (!scumm_stricmp((const char *)(ptr + 8), "exit")) {
 					sound->marker[curIndexMarker].pos = READ_BE_UINT32(ptr + 4);
 					sound->marker[curIndexMarker].length = strlen((const char *)(ptr + 8)) + 1;
@@ -267,16 +267,16 @@ void ImuseDigiSndMgr::prepareSound(byte *ptr, SoundDesc *sound) {
 				}
 				size = READ_BE_UINT32(ptr); ptr += size + 4;
 				break;
-			case MKID_BE('STOP'):
+			case MKTAG('S','T','O','P'):
 				size = READ_BE_UINT32(ptr); ptr += size + 4;
 				break;
-			case MKID_BE('REGN'):
+			case MKTAG('R','E','G','N'):
 				ptr += 4;
 				sound->region[curIndexRegion].offset = READ_BE_UINT32(ptr); ptr += 4;
 				sound->region[curIndexRegion].length = READ_BE_UINT32(ptr); ptr += 4;
 				curIndexRegion++;
 				break;
-			case MKID_BE('JUMP'):
+			case MKTAG('J','U','M','P'):
 				ptr += 4;
 				sound->jump[curIndexJump].offset = READ_BE_UINT32(ptr); ptr += 4;
 				sound->jump[curIndexJump].dest = READ_BE_UINT32(ptr); ptr += 4;
@@ -284,7 +284,7 @@ void ImuseDigiSndMgr::prepareSound(byte *ptr, SoundDesc *sound) {
 				sound->jump[curIndexJump].fadeDelay = READ_BE_UINT32(ptr); ptr += 4;
 				curIndexJump++;
 				break;
-			case MKID_BE('SYNC'):
+			case MKTAG('S','Y','N','C'):
 				size = READ_BE_UINT32(ptr); ptr += 4;
 				sound->sync[curIndexSync].size = size;
 				sound->sync[curIndexSync].ptr = new byte[size];
@@ -293,13 +293,13 @@ void ImuseDigiSndMgr::prepareSound(byte *ptr, SoundDesc *sound) {
 				curIndexSync++;
 				ptr += size;
 				break;
-			case MKID_BE('DATA'):
+			case MKTAG('D','A','T','A'):
 				ptr += 4;
 				break;
 			default:
 				error("ImuseDigiSndMgr::prepareSound(%d/%s) Unknown sfx header '%s'", sound->soundId, sound->name, tag2str(tag));
 			}
-		} while (tag != MKID_BE('DATA'));
+		} while (tag != MKTAG('D','A','T','A'));
 		sound->offsetData = ptr - s_ptr;
 	} else {
 		error("ImuseDigiSndMgr::prepareSound(): Unknown sound format");
diff --git a/engines/scumm/insane/insane.cpp b/engines/scumm/insane/insane.cpp
index f2e50382b3..a82c0ae408 100644
--- a/engines/scumm/insane/insane.cpp
+++ b/engines/scumm/insane/insane.cpp
@@ -1413,7 +1413,7 @@ int32 Insane::smush_setupSanWithFlu(const char *filename, int32 setupsan2, int32
 	_smush_setupsan1 = setupsan1;
 
 	/* skip FLUP marker */
-	if (READ_BE_UINT32(fluPtr) == MKID_BE('FLUP'))
+	if (READ_BE_UINT32(fluPtr) == MKTAG('F','L','U','P'))
 		tmp += 8;
 
 	_smush_setupsan2 = setupsan2;
diff --git a/engines/scumm/nut_renderer.cpp b/engines/scumm/nut_renderer.cpp
index d56017c6f5..7f250e45e0 100644
--- a/engines/scumm/nut_renderer.cpp
+++ b/engines/scumm/nut_renderer.cpp
@@ -95,7 +95,7 @@ void NutRenderer::loadFont(const char *filename) {
 	}
 
 	uint32 tag = file.readUint32BE();
-	if (tag != MKID_BE('ANIM')) {
+	if (tag != MKTAG('A','N','I','M')) {
 		error("NutRenderer::loadFont() there is no ANIM chunk in font header");
 	}
 
@@ -104,7 +104,7 @@ void NutRenderer::loadFont(const char *filename) {
 	file.read(dataSrc, length);
 	file.close();
 
-	if (READ_BE_UINT32(dataSrc) != MKID_BE('AHDR')) {
+	if (READ_BE_UINT32(dataSrc) != MKTAG('A','H','D','R')) {
 		error("NutRenderer::loadFont() there is no AHDR chunk in font header");
 	}
 
@@ -142,12 +142,12 @@ void NutRenderer::loadFont(const char *filename) {
 	offset = 0;
 	for (l = 0; l < _numChars; l++) {
 		offset += READ_BE_UINT32(dataSrc + offset + 4) + 8;
-		if (READ_BE_UINT32(dataSrc + offset) != MKID_BE('FRME')) {
+		if (READ_BE_UINT32(dataSrc + offset) != MKTAG('F','R','M','E')) {
 			error("NutRenderer::loadFont(%s) there is no FRME chunk %d (offset %x)", filename, l, offset);
 			break;
 		}
 		offset += 8;
-		if (READ_BE_UINT32(dataSrc + offset) != MKID_BE('FOBJ')) {
+		if (READ_BE_UINT32(dataSrc + offset) != MKTAG('F','O','B','J')) {
 			error("NutRenderer::loadFont(%s) there is no FOBJ chunk in FRME chunk %d (offset %x)", filename, l, offset);
 			break;
 		}
diff --git a/engines/scumm/object.cpp b/engines/scumm/object.cpp
index c44043ca81..c2547f74f4 100644
--- a/engines/scumm/object.cpp
+++ b/engines/scumm/object.cpp
@@ -416,7 +416,7 @@ void ScummEngine::getObjectXYPos(int object, int &x, int &y, int &dir) {
 			debug(0, "getObjectXYPos: Can't find object %d", object);
 			return;
 		}
-		imhd = (const ImageHeader *)findResourceData(MKID_BE('IMHD'), ptr);
+		imhd = (const ImageHeader *)findResourceData(MKTAG('I','M','H','D'), ptr);
 		assert(imhd);
 		if (_game.version == 8) {
 			switch (FROM_LE_32(imhd->v8.version)) {
@@ -655,7 +655,7 @@ void ScummEngine::drawObject(int obj, int arg) {
 			flags |= Gdi::dbDrawMaskOnAll;
 
 #ifdef ENABLE_HE
-		if (_game.heversion >= 70 && findResource(MKID_BE('SMAP'), ptr) == NULL)
+		if (_game.heversion >= 70 && findResource(MKTAG('S','M','A','P'), ptr) == NULL)
 			_gdi->drawBMAPObject(ptr, &_virtscr[kMainVirtScreen], obj, od.x_pos, od.y_pos, od.width, od.height);
 		else
 #endif
@@ -762,12 +762,12 @@ void ScummEngine::resetRoomObjects() {
 	for (i = 0; i < _numObjectsInRoom; i++) {
 		od = &_objs[findLocalObjectSlot()];
 
-		ptr = obcds.findNext(MKID_BE('OBCD'));
+		ptr = obcds.findNext(MKTAG('O','B','C','D'));
 		if (ptr == NULL)
 			error("Room %d missing object code block(s)", _roomResource);
 
 		od->OBCDoffset = ptr - rootptr;
-		cdhd = (const CodeHeader *)findResourceData(MKID_BE('CDHD'), ptr);
+		cdhd = (const CodeHeader *)findResourceData(MKTAG('C','D','H','D'), ptr);
 
 		if (_game.version >= 7)
 			od->obj_nr = READ_LE_UINT16(&(cdhd->v7.obj_id));
@@ -779,7 +779,7 @@ void ScummEngine::resetRoomObjects() {
 		if (_dumpScripts) {
 			char buf[32];
 			sprintf(buf, "roomobj-%d-", _roomResource);
-			ptr = findResource(MKID_BE('VERB'), ptr);
+			ptr = findResource(MKTAG('V','E','R','B'), ptr);
 			dumpResource(buf, od->obj_nr, ptr);
 		}
 
@@ -788,7 +788,7 @@ void ScummEngine::resetRoomObjects() {
 	searchptr = room;
 	ResourceIterator	obims(room, false);
 	for (i = 0; i < _numObjectsInRoom; i++) {
-		ptr = obims.findNext(MKID_BE('OBIM'));
+		ptr = obims.findNext(MKTAG('O','B','I','M'));
 		if (ptr == NULL)
 			error("Room %d missing image blocks(s)", _roomResource);
 
@@ -870,7 +870,7 @@ void ScummEngine_v4::resetRoomObjects() {
 	for (i = 0; i < _numObjectsInRoom; i++) {
 		od = &_objs[findLocalObjectSlot()];
 
-		ptr = obcds.findNext(MKID_BE('OBCD'));
+		ptr = obcds.findNext(MKTAG('O','B','C','D'));
 		if (ptr == NULL)
 			error("Room %d missing object code block(s)", _roomResource);
 
@@ -887,7 +887,7 @@ void ScummEngine_v4::resetRoomObjects() {
 	for (i = 0; i < _numObjectsInRoom; i++) {
 		// In the PC Engine version of Loom, there aren't image blocks
 		// for all objects.
-		ptr = obims.findNext(MKID_BE('OBIM'));
+		ptr = obims.findNext(MKTAG('O','B','I','M'));
 		if (ptr == NULL)
 			break;
 
@@ -991,11 +991,11 @@ void ScummEngine::resetRoomObject(ObjectData *od, const byte *room, const byte *
 			searchptr = room;
 	}
 
-	cdhd = (const CodeHeader *)findResourceData(MKID_BE('CDHD'), searchptr + od->OBCDoffset);
+	cdhd = (const CodeHeader *)findResourceData(MKTAG('C','D','H','D'), searchptr + od->OBCDoffset);
 	if (cdhd == NULL)
 		error("Room %d missing CDHD blocks(s)", _roomResource);
 	if (od->OBIMoffset)
-		imhd = (const ImageHeader *)findResourceData(MKID_BE('IMHD'), room + od->OBIMoffset);
+		imhd = (const ImageHeader *)findResourceData(MKTAG('I','M','H','D'), room + od->OBIMoffset);
 
 	od->flags = Gdi::dbAllowMaskOr;
 
@@ -1194,7 +1194,7 @@ const byte *ScummEngine::getObjOrActorName(int obj) {
 		return (objptr + offset);
 	}
 
-	return findResourceData(MKID_BE('OBNA'), objptr);
+	return findResourceData(MKTAG('O','B','N','A'), objptr);
 }
 
 void ScummEngine::setObjectName(int obj) {
@@ -1278,7 +1278,7 @@ const byte *ScummEngine::getOBIMFromObjectData(const ObjectData &od) {
 
 	if (od.fl_object_index) {
 		ptr = getResourceAddress(rtFlObject, od.fl_object_index);
-		ptr = findResource(MKID_BE('OBIM'), ptr);
+		ptr = findResource(MKTAG('O','B','I','M'), ptr);
 	} else {
 		ptr = getResourceAddress(rtRoom, _roomResource);
 		if (ptr)
@@ -1288,23 +1288,23 @@ const byte *ScummEngine::getOBIMFromObjectData(const ObjectData &od) {
 }
 
 static const uint32 IMxx_tags[] = {
-	MKID_BE('IM00'),
-	MKID_BE('IM01'),
-	MKID_BE('IM02'),
-	MKID_BE('IM03'),
-	MKID_BE('IM04'),
-	MKID_BE('IM05'),
-	MKID_BE('IM06'),
-	MKID_BE('IM07'),
-	MKID_BE('IM08'),
-	MKID_BE('IM09'),
-	MKID_BE('IM0A'),
-	MKID_BE('IM0B'),
-	MKID_BE('IM0C'),
-	MKID_BE('IM0D'),
-	MKID_BE('IM0E'),
-	MKID_BE('IM0F'),
-	MKID_BE('IM10')
+	MKTAG('I','M','0','0'),
+	MKTAG('I','M','0','1'),
+	MKTAG('I','M','0','2'),
+	MKTAG('I','M','0','3'),
+	MKTAG('I','M','0','4'),
+	MKTAG('I','M','0','5'),
+	MKTAG('I','M','0','6'),
+	MKTAG('I','M','0','7'),
+	MKTAG('I','M','0','8'),
+	MKTAG('I','M','0','9'),
+	MKTAG('I','M','0','A'),
+	MKTAG('I','M','0','B'),
+	MKTAG('I','M','0','C'),
+	MKTAG('I','M','0','D'),
+	MKTAG('I','M','0','E'),
+	MKTAG('I','M','0','F'),
+	MKTAG('I','M','1','0')
 };
 
 const byte *ScummEngine::getObjectImage(const byte *ptr, int state) {
@@ -1317,15 +1317,15 @@ const byte *ScummEngine::getObjectImage(const byte *ptr, int state) {
 		// The OBIM contains an IMAG, which in turn contains a WRAP, which contains
 		// an OFFS chunk and multiple BOMP/SMAP chunks. To find the right BOMP/SMAP,
 		// we use the offsets in the OFFS chunk,
-		ptr = findResource(MKID_BE('IMAG'), ptr);
+		ptr = findResource(MKTAG('I','M','A','G'), ptr);
 		if (!ptr)
 			return 0;
 
-		ptr = findResource(MKID_BE('WRAP'), ptr);
+		ptr = findResource(MKTAG('W','R','A','P'), ptr);
 		if (!ptr)
 			return 0;
 
-		ptr = findResource(MKID_BE('OFFS'), ptr);
+		ptr = findResource(MKTAG('O','F','F','S'), ptr);
 		if (!ptr)
 			return 0;
 
@@ -1348,7 +1348,7 @@ int ScummEngine::getObjectImageCount(int object) {
 		return 0;
 
 	ptr = getOBIMFromObjectData(_objs[objnum]);
-	imhd = (const ImageHeader *)findResourceData(MKID_BE('IMHD'), ptr);
+	imhd = (const ImageHeader *)findResourceData(MKTAG('I','M','H','D'), ptr);
 	if (!imhd)
 		return 0;
 
@@ -1365,7 +1365,7 @@ int ScummEngine::getObjectImageCount(int object) {
 int ScummEngine_v8::getObjectIdFromOBIM(const byte *obim) {
 	// In V8, IMHD has no obj_id, but rather a name string. We map the name
 	// back to an object id using a table derived from the DOBJ resource.
-	const ImageHeader *imhd = (const ImageHeader *)findResourceData(MKID_BE('IMHD'), obim);
+	const ImageHeader *imhd = (const ImageHeader *)findResourceData(MKTAG('I','M','H','D'), obim);
 	ObjectNameId *found = (ObjectNameId *)bsearch(imhd->v8.name, _objectIDMap, _objectIDMapSize,
 					sizeof(ObjectNameId), (int (*)(const void*, const void*))strcmp);
 	assert(found);
@@ -1373,7 +1373,7 @@ int ScummEngine_v8::getObjectIdFromOBIM(const byte *obim) {
 }
 
 int ScummEngine_v7::getObjectIdFromOBIM(const byte *obim) {
-	const ImageHeader *imhd = (const ImageHeader *)findResourceData(MKID_BE('IMHD'), obim);
+	const ImageHeader *imhd = (const ImageHeader *)findResourceData(MKTAG('I','M','H','D'), obim);
 	return READ_LE_UINT16(&imhd->v7.obj_id);
 }
 #endif
@@ -1382,7 +1382,7 @@ int ScummEngine::getObjectIdFromOBIM(const byte *obim) {
 	if (_game.features & GF_SMALL_HEADER)
 		return READ_LE_UINT16(obim + 6);
 
-	const ImageHeader *imhd = (const ImageHeader *)findResourceData(MKID_BE('IMHD'), obim);
+	const ImageHeader *imhd = (const ImageHeader *)findResourceData(MKTAG('I','M','H','D'), obim);
 	return READ_LE_UINT16(&imhd->old.obj_id);
 }
 
@@ -1400,7 +1400,7 @@ void ScummEngine::findObjectInRoom(FindObjectInRoom *fo, byte findWhat, uint id,
 		if (findWhat & foCodeHeader) {
 			fo->obcd = obcdptr = getOBCDFromObject(id);
 			assert(obcdptr);
-			fo->cdhd = (const CodeHeader *)findResourceData(MKID_BE('CDHD'), obcdptr);
+			fo->cdhd = (const CodeHeader *)findResourceData(MKTAG('C','D','H','D'), obcdptr);
 		}
 		if (findWhat & foImageHeader) {
 			fo->obim = obimptr = getOBIMFromObjectData(_objs[id2]);
@@ -1416,7 +1416,7 @@ void ScummEngine::findObjectInRoom(FindObjectInRoom *fo, byte findWhat, uint id,
 	if (_game.features & GF_OLD_BUNDLE) {
 		numobj = roomptr[20];
 	} else {
-		const RoomHeader *roomhdr = (const RoomHeader *)findResourceData(MKID_BE('RMHD'), roomptr);
+		const RoomHeader *roomhdr = (const RoomHeader *)findResourceData(MKTAG('R','M','H','D'), roomptr);
 
 		if (_game.version == 8)
 			numobj = READ_LE_UINT32(&(roomhdr->v8.numObjects));
@@ -1467,10 +1467,10 @@ void ScummEngine::findObjectInRoom(FindObjectInRoom *fo, byte findWhat, uint id,
 		assert(searchptr);
 		ResourceIterator	obcds(searchptr, (_game.features & GF_SMALL_HEADER) != 0);
 		for (i = 0; i < numobj; i++) {
-			obcdptr = obcds.findNext(MKID_BE('OBCD'));
+			obcdptr = obcds.findNext(MKTAG('O','B','C','D'));
 			if (obcdptr == NULL)
 				error("findObjectInRoom: Not enough code blocks in room %d", room);
-			cdhd = (const CodeHeader *)findResourceData(MKID_BE('CDHD'), obcdptr);
+			cdhd = (const CodeHeader *)findResourceData(MKTAG('C','D','H','D'), obcdptr);
 
 			if (_game.features & GF_SMALL_HEADER)
 				id2 = READ_LE_UINT16(obcdptr + 6);
@@ -1495,7 +1495,7 @@ void ScummEngine::findObjectInRoom(FindObjectInRoom *fo, byte findWhat, uint id,
 	if (findWhat & foImageHeader) {
 		ResourceIterator	obims(roomptr, (_game.features & GF_SMALL_HEADER) != 0);
 		for (i = 0; i < numobj; i++) {
-			obimptr = obims.findNext(MKID_BE('OBIM'));
+			obimptr = obims.findNext(MKTAG('O','B','I','M'));
 			if (obimptr == NULL)
 				error("findObjectInRoom: Not enough image blocks in room %d", room);
 			obim_id = getObjectIdFromOBIM(obimptr);
@@ -1699,7 +1699,7 @@ void ScummEngine_v6::drawBlastObject(BlastObject *eo) {
 		if (!img)
 			img = getObjectImage(ptr, 1);	// Backward compatibility with samnmax blast objects
 		assert(img);
-		bomp = findResourceData(MKID_BE('BOMP'), img);
+		bomp = findResourceData(MKTAG('B','O','M','P'), img);
 	}
 
 	if (!bomp)
@@ -1843,7 +1843,7 @@ void ScummEngine::loadFlObject(uint object, uint room) {
 		char buf[32];
 		const byte *ptr = foir.obcd;
 		sprintf(buf, "roomobj-%d-", room);
-		ptr = findResource(MKID_BE('VERB'), ptr);
+		ptr = findResource(MKTAG('V','E','R','B'), ptr);
 		dumpResource(buf, object, ptr);
 	}
 
@@ -1869,7 +1869,7 @@ void ScummEngine::loadFlObject(uint object, uint room) {
 	assert(flob);
 
 	// Copy object code + object image to floating object
-	WRITE_UINT32(flob, MKID_BE('FLOB'));
+	WRITE_UINT32(flob, MKTAG('F','L','O','B'));
 	WRITE_BE_UINT32(flob + 4, flob_size);
 	memcpy(flob + 8, foir.obcd, obcd_size);
 	memcpy(flob + 8 + obcd_size, foir.obim, obim_size);
diff --git a/engines/scumm/palette.cpp b/engines/scumm/palette.cpp
index 18784151b7..e81212fec8 100644
--- a/engines/scumm/palette.cpp
+++ b/engines/scumm/palette.cpp
@@ -1029,7 +1029,7 @@ void ScummEngine::setCurrentPalette(int palindex) {
 void ScummEngine::setRoomPalette(int palindex, int room) {
 	const byte *roomptr = getResourceAddress(rtRoom, room);
 	assert(roomptr);
-	const byte *pals = findResource(MKID_BE('PALS'), roomptr);
+	const byte *pals = findResource(MKTAG('P','A','L','S'), roomptr);
 	assert(pals);
 	const byte *rgbs = findPalInPals(pals, palindex);
 	assert(rgbs);
@@ -1040,11 +1040,11 @@ const byte *ScummEngine::findPalInPals(const byte *pal, int idx) {
 	const byte *offs;
 	uint32 size;
 
-	pal = findResource(MKID_BE('WRAP'), pal);
+	pal = findResource(MKTAG('W','R','A','P'), pal);
 	if (pal == NULL)
 		return NULL;
 
-	offs = findResourceData(MKID_BE('OFFS'), pal);
+	offs = findResourceData(MKTAG('O','F','F','S'), pal);
 	if (offs == NULL)
 		return NULL;
 
diff --git a/engines/scumm/player_towns.cpp b/engines/scumm/player_towns.cpp
index 06f97fd671..8922ff1730 100644
--- a/engines/scumm/player_towns.cpp
+++ b/engines/scumm/player_towns.cpp
@@ -622,7 +622,7 @@ int Player_Towns_v2::getSoundStatus(int sound) const {
 void Player_Towns_v2::startSound(int sound) {
 	uint8 *ptr = _vm->getResourceAddress(rtSound, sound);
 
-	if (READ_BE_UINT32(ptr) == MKID_BE('TOWS')) {
+	if (READ_BE_UINT32(ptr) == MKTAG('T','O','W','S')) {
 		_soundOverride[sound].type = 7;
 		uint8 velo = _soundOverride[sound].velo ? _soundOverride[sound].velo - 1: (ptr[10] + ptr[11] + 1) >> 1;
 		uint8 pan = _soundOverride[sound].pan ? _soundOverride[sound].pan - 1 : 64;
@@ -630,7 +630,7 @@ void Player_Towns_v2::startSound(int sound) {
 		_soundOverride[sound].velo = _soundOverride[sound].pan = 0;
 		playPcmTrack(sound, ptr + 8, velo, pan, ptr[52], pri);
 
-	} else if (READ_BE_UINT32(ptr) == MKID_BE('SBL ')) {
+	} else if (READ_BE_UINT32(ptr) == MKTAG('S','B','L',' ')) {
 		_soundOverride[sound].type = 5;
 		playVocTrack(ptr + 27);
 
@@ -680,7 +680,7 @@ int32 Player_Towns_v2::doCommand(int numargs, int args[]) {
 	case 258:
 		if (_soundOverride[args[1]].type == 0) {
 			ptr = _vm->getResourceAddress(rtSound, args[1]);
-			if (READ_BE_UINT32(ptr) == MKID_BE('TOWS')) 
+			if (READ_BE_UINT32(ptr) == MKTAG('T','O','W','S')) 
 				_soundOverride[args[1]].type = 7;
 		}
 		if (_soundOverride[args[1]].type == 7)	{
@@ -692,7 +692,7 @@ int32 Player_Towns_v2::doCommand(int numargs, int args[]) {
 	case 259:
 		if (_soundOverride[args[1]].type == 0) {
 			ptr = _vm->getResourceAddress(rtSound, args[1]);
-			if (READ_BE_UINT32(ptr) == MKID_BE('TOWS')) 
+			if (READ_BE_UINT32(ptr) == MKTAG('T','O','W','S')) 
 				_soundOverride[args[1]].type = 7;
 		}
 		if (_soundOverride[args[1]].type == 7)	{
diff --git a/engines/scumm/resource.cpp b/engines/scumm/resource.cpp
index 5bc643a5d1..c872a83d14 100644
--- a/engines/scumm/resource.cpp
+++ b/engines/scumm/resource.cpp
@@ -259,26 +259,26 @@ void ScummEngine::readIndexFile() {
 			if (_fileHandle->eos() || _fileHandle->err())
 				break;
 			switch (blocktype) {
-			case MKID_BE('DOBJ'):
+			case MKTAG('D','O','B','J'):
 				_numGlobalObjects = _fileHandle->readUint16LE();
 				itemsize -= 2;
 				break;
-			case MKID_BE('DROO'):
+			case MKTAG('D','R','O','O'):
 				_numRooms = _fileHandle->readUint16LE();
 				itemsize -= 2;
 				break;
 
-			case MKID_BE('DSCR'):
+			case MKTAG('D','S','C','R'):
 				_numScripts = _fileHandle->readUint16LE();
 				itemsize -= 2;
 				break;
 
-			case MKID_BE('DCOS'):
+			case MKTAG('D','C','O','S'):
 				_numCostumes = _fileHandle->readUint16LE();
 				itemsize -= 2;
 				break;
 
-			case MKID_BE('DSOU'):
+			case MKTAG('D','S','O','U'):
 				_numSounds = _fileHandle->readUint16LE();
 				itemsize -= 2;
 				break;
@@ -351,7 +351,7 @@ void ScummEngine_v7::readIndexBlock(uint32 blocktype, uint32 itemsize) {
 	int num;
 	char *ptr;
 	switch (blocktype) {
-	case MKID_BE('ANAM'):		// Used by: The Dig, FT
+	case MKTAG('A','N','A','M'):		// Used by: The Dig, FT
 		debug(9, "found ANAM block, reading audio names");
 		num = _fileHandle->readUint16LE();
 		ptr = (char*)malloc(num * 9);
@@ -359,7 +359,7 @@ void ScummEngine_v7::readIndexBlock(uint32 blocktype, uint32 itemsize) {
 		_imuseDigital->setAudioNames(num, ptr);
 		break;
 
-	case MKID_BE('DRSC'):		// Used by: COMI
+	case MKTAG('D','R','S','C'):		// Used by: COMI
 		readResTypeList(rtRoomScripts);
 		break;
 
@@ -372,37 +372,37 @@ void ScummEngine_v7::readIndexBlock(uint32 blocktype, uint32 itemsize) {
 void ScummEngine_v70he::readIndexBlock(uint32 blocktype, uint32 itemsize) {
 	int i;
 	switch (blocktype) {
-	case MKID_BE('DIRI'):
+	case MKTAG('D','I','R','I'):
 		readResTypeList(rtRoomImage);
 		break;
 
-	case MKID_BE('DIRM'):
+	case MKTAG('D','I','R','M'):
 		readResTypeList(rtImage);
 		break;
 
-	case MKID_BE('DIRT'):
+	case MKTAG('D','I','R','T'):
 		readResTypeList(rtTalkie);
 		break;
 
-	case MKID_BE('DLFL'):
+	case MKTAG('D','L','F','L'):
 		i = _fileHandle->readUint16LE();
 		_fileHandle->seek(-2, SEEK_CUR);
 		_heV7RoomOffsets = (byte *)calloc(2 + (i * 4), 1);
 		_fileHandle->read(_heV7RoomOffsets, (2 + (i * 4)) );
 		break;
 
-	case MKID_BE('DISK'):
+	case MKTAG('D','I','S','K'):
 		i = _fileHandle->readUint16LE();
 		_heV7DiskOffsets = (byte *)calloc(i, 1);
 		_fileHandle->read(_heV7DiskOffsets, i);
 		break;
 
-	case MKID_BE('SVER'):
+	case MKTAG('S','V','E','R'):
 		// Index version number
 		_fileHandle->seek(itemsize - 8, SEEK_CUR);
 		break;
 
-	case MKID_BE('INIB'):
+	case MKTAG('I','N','I','B'):
 		_fileHandle->seek(itemsize - 8, SEEK_CUR);
 		debug(2, "INIB index block not yet handled, skipping");
 		break;
@@ -415,17 +415,17 @@ void ScummEngine_v70he::readIndexBlock(uint32 blocktype, uint32 itemsize) {
 void ScummEngine::readIndexBlock(uint32 blocktype, uint32 itemsize) {
 	int i;
 	switch (blocktype) {
-	case MKID_BE('DCHR'):
-	case MKID_BE('DIRF'):
+	case MKTAG('D','C','H','R'):
+	case MKTAG('D','I','R','F'):
 		readResTypeList(rtCharset);
 		break;
 
-	case MKID_BE('DOBJ'):
+	case MKTAG('D','O','B','J'):
 		debug(9, "found DOBJ block, reading object table");
 		readGlobalObjects();
 		break;
 
-	case MKID_BE('RNAM'):
+	case MKTAG('R','N','A','M'):
 		// Names of rooms. Maybe we should put them into a table, for use by the debugger?
 		if (_game.heversion >= 80) {
 			for (int room; (room = _fileHandle->readUint16LE()); ) {
@@ -449,32 +449,32 @@ void ScummEngine::readIndexBlock(uint32 blocktype, uint32 itemsize) {
 		}
 		break;
 
-	case MKID_BE('DROO'):
-	case MKID_BE('DIRR'):
+	case MKTAG('D','R','O','O'):
+	case MKTAG('D','I','R','R'):
 		readResTypeList(rtRoom);
 		break;
 
-	case MKID_BE('DSCR'):
-	case MKID_BE('DIRS'):
+	case MKTAG('D','S','C','R'):
+	case MKTAG('D','I','R','S'):
 		readResTypeList(rtScript);
 		break;
 
-	case MKID_BE('DCOS'):
-	case MKID_BE('DIRC'):
+	case MKTAG('D','C','O','S'):
+	case MKTAG('D','I','R','C'):
 		readResTypeList(rtCostume);
 		break;
 
-	case MKID_BE('MAXS'):
+	case MKTAG('M','A','X','S'):
 		readMAXS(itemsize);
 		allocateArrays();
 		break;
 
-	case MKID_BE('DIRN'):
-	case MKID_BE('DSOU'):
+	case MKTAG('D','I','R','N'):
+	case MKTAG('D','S','O','U'):
 		readResTypeList(rtSound);
 		break;
 
-	case MKID_BE('AARY'):
+	case MKTAG('A','A','R','Y'):
 		readArrayFromIndexFile();
 		break;
 
@@ -1287,14 +1287,14 @@ void ScummEngine::allocateArrays() {
 		_arraySlot = (byte *)calloc(_numArray, 1);
 	}
 
-	_res->allocResTypeData(rtCostume, (_game.features & GF_NEW_COSTUMES) ? MKID_BE('AKOS') : MKID_BE('COST'),
+	_res->allocResTypeData(rtCostume, (_game.features & GF_NEW_COSTUMES) ? MKTAG('A','K','O','S') : MKTAG('C','O','S','T'),
 								_numCostumes, "costume", 1);
-	_res->allocResTypeData(rtRoom, MKID_BE('ROOM'), _numRooms, "room", 1);
-	_res->allocResTypeData(rtRoomImage, MKID_BE('RMIM'), _numRooms, "room image", 1);
-	_res->allocResTypeData(rtRoomScripts, MKID_BE('RMSC'), _numRooms, "room script", 1);
-	_res->allocResTypeData(rtSound, MKID_BE('SOUN'), _numSounds, "sound", 2);
-	_res->allocResTypeData(rtScript, MKID_BE('SCRP'), _numScripts, "script", 1);
-	_res->allocResTypeData(rtCharset, MKID_BE('CHAR'), _numCharsets, "charset", 1);
+	_res->allocResTypeData(rtRoom, MKTAG('R','O','O','M'), _numRooms, "room", 1);
+	_res->allocResTypeData(rtRoomImage, MKTAG('R','M','I','M'), _numRooms, "room image", 1);
+	_res->allocResTypeData(rtRoomScripts, MKTAG('R','M','S','C'), _numRooms, "room script", 1);
+	_res->allocResTypeData(rtSound, MKTAG('S','O','U','N'), _numSounds, "sound", 2);
+	_res->allocResTypeData(rtScript, MKTAG('S','C','R','P'), _numScripts, "script", 1);
+	_res->allocResTypeData(rtCharset, MKTAG('C','H','A','R'), _numCharsets, "charset", 1);
 	_res->allocResTypeData(rtObjectName, 0, _numNewNames, "new name", 0);
 	_res->allocResTypeData(rtInventory, 0, _numInventory, "inventory", 0);
 	_res->allocResTypeData(rtTemp, 0, 10, "temp", 0);
@@ -1304,8 +1304,8 @@ void ScummEngine::allocateArrays() {
 	_res->allocResTypeData(rtString, 0, _numArray, "array", 0);
 	_res->allocResTypeData(rtFlObject, 0, _numFlObject, "flobject", 0);
 	_res->allocResTypeData(rtMatrix, 0, 10, "boxes", 0);
-	_res->allocResTypeData(rtImage, MKID_BE('AWIZ'), _numImages, "images", 1);
-	_res->allocResTypeData(rtTalkie, MKID_BE('TLKE'), _numTalkies, "talkie", 1);
+	_res->allocResTypeData(rtImage, MKTAG('A','W','I','Z'), _numImages, "images", 1);
+	_res->allocResTypeData(rtTalkie, MKTAG('T','L','K','E'), _numTalkies, "talkie", 1);
 }
 
 void ScummEngine_v70he::allocateArrays() {
@@ -1464,35 +1464,35 @@ const byte *findResourceSmall(uint32 tag, const byte *searchin) {
 
 uint16 newTag2Old(uint32 newTag) {
 	switch (newTag) {
-	case (MKID_BE('RMHD')):
+	case (MKTAG('R','M','H','D')):
 		return (0x4448);	// HD
-	case (MKID_BE('IM00')):
+	case (MKTAG('I','M','0','0')):
 		return (0x4D42);	// BM
-	case (MKID_BE('EXCD')):
+	case (MKTAG('E','X','C','D')):
 		return (0x5845);	// EX
-	case (MKID_BE('ENCD')):
+	case (MKTAG('E','N','C','D')):
 		return (0x4E45);	// EN
-	case (MKID_BE('SCAL')):
+	case (MKTAG('S','C','A','L')):
 		return (0x4153);	// SA
-	case (MKID_BE('LSCR')):
+	case (MKTAG('L','S','C','R')):
 		return (0x534C);	// LS
-	case (MKID_BE('OBCD')):
+	case (MKTAG('O','B','C','D')):
 		return (0x434F);	// OC
-	case (MKID_BE('OBIM')):
+	case (MKTAG('O','B','I','M')):
 		return (0x494F);	// OI
-	case (MKID_BE('SMAP')):
+	case (MKTAG('S','M','A','P')):
 		return (0x4D42);	// BM
-	case (MKID_BE('CLUT')):
+	case (MKTAG('C','L','U','T')):
 		return (0x4150);	// PA
-	case (MKID_BE('BOXD')):
+	case (MKTAG('B','O','X','D')):
 		return (0x5842);	// BX
-	case (MKID_BE('CYCL')):
+	case (MKTAG('C','Y','C','L')):
 		return (0x4343);	// CC
-	case (MKID_BE('EPAL')):
+	case (MKTAG('E','P','A','L')):
 		return (0x5053);	// SP
-	case (MKID_BE('TILE')):
+	case (MKTAG('T','I','L','E')):
 		return (0x4C54);	// TL
-	case (MKID_BE('ZP00')):
+	case (MKTAG('Z','P','0','0')):
 		return (0x505A);	// ZP
 	default:
 		return (0);
diff --git a/engines/scumm/room.cpp b/engines/scumm/room.cpp
index 58b6cdb105..06fa0f2c39 100644
--- a/engines/scumm/room.cpp
+++ b/engines/scumm/room.cpp
@@ -264,7 +264,7 @@ void ScummEngine::setupRoomSubBlocks() {
 	//
 	// Determine the room dimensions (width/height)
 	//
-	rmhd = (const RoomHeader *)findResourceData(MKID_BE('RMHD'), roomptr);
+	rmhd = (const RoomHeader *)findResourceData(MKTAG('R','M','H','D'), roomptr);
 
 	if (_game.version == 8) {
 		_roomWidth = READ_LE_UINT32(&(rmhd->v8.width));
@@ -286,18 +286,18 @@ void ScummEngine::setupRoomSubBlocks() {
 	if (_game.version == 8) {
 		_IM00_offs = getObjectImage(roomptr, 1) - roomptr;
 	} else if (_game.features & GF_SMALL_HEADER) {
-		_IM00_offs = findResourceData(MKID_BE('IM00'), roomptr) - roomptr;
+		_IM00_offs = findResourceData(MKTAG('I','M','0','0'), roomptr) - roomptr;
 	} else if (_game.heversion >= 70) {
 		byte *roomImagePtr = getResourceAddress(rtRoomImage, _roomResource);
-		_IM00_offs = findResource(MKID_BE('IM00'), roomImagePtr) - roomImagePtr;
+		_IM00_offs = findResource(MKTAG('I','M','0','0'), roomImagePtr) - roomImagePtr;
 	} else {
-		_IM00_offs = findResource(MKID_BE('IM00'), findResource(MKID_BE('RMIM'), roomptr)) - roomptr;
+		_IM00_offs = findResource(MKTAG('I','M','0','0'), findResource(MKTAG('R','M','I','M'), roomptr)) - roomptr;
 	}
 
 	//
 	// Look for an exit script
 	//
-	ptr = findResourceData(MKID_BE('EXCD'), roomResPtr);
+	ptr = findResourceData(MKTAG('E','X','C','D'), roomResPtr);
 	if (ptr)
 		_EXCD_offs = ptr - roomResPtr;
 	if (_dumpScripts && _EXCD_offs)
@@ -306,7 +306,7 @@ void ScummEngine::setupRoomSubBlocks() {
 	//
 	// Look for an entry script
 	//
-	ptr = findResourceData(MKID_BE('ENCD'), roomResPtr);
+	ptr = findResourceData(MKTAG('E','N','C','D'), roomResPtr);
 	if (ptr)
 		_ENCD_offs = ptr - roomResPtr;
 	if (_dumpScripts && _ENCD_offs)
@@ -326,7 +326,7 @@ void ScummEngine::setupRoomSubBlocks() {
 
 	if (_game.features & GF_SMALL_HEADER) {
 		ResourceIterator localScriptIterator(searchptr, true);
-		while ((ptr = localScriptIterator.findNext(MKID_BE('LSCR'))) != NULL) {
+		while ((ptr = localScriptIterator.findNext(MKTAG('L','S','C','R'))) != NULL) {
 			int id = 0;
 			ptr += _resourceHeaderSize;	/* skip tag & size */
 			id = ptr[0];
@@ -341,7 +341,7 @@ void ScummEngine::setupRoomSubBlocks() {
 		}
 	} else if (_game.heversion >= 90) {
 		ResourceIterator localScriptIterator2(searchptr, false);
-		while ((ptr = localScriptIterator2.findNext(MKID_BE('LSC2'))) != NULL) {
+		while ((ptr = localScriptIterator2.findNext(MKTAG('L','S','C','2'))) != NULL) {
 			int id = 0;
 
 			ptr += _resourceHeaderSize;	/* skip tag & size */
@@ -359,7 +359,7 @@ void ScummEngine::setupRoomSubBlocks() {
 		}
 
 		ResourceIterator localScriptIterator(searchptr, false);
-		while ((ptr = localScriptIterator.findNext(MKID_BE('LSCR'))) != NULL) {
+		while ((ptr = localScriptIterator.findNext(MKTAG('L','S','C','R'))) != NULL) {
 			int id = 0;
 
 			ptr += _resourceHeaderSize;	/* skip tag & size */
@@ -376,7 +376,7 @@ void ScummEngine::setupRoomSubBlocks() {
 
 	} else {
 		ResourceIterator localScriptIterator(searchptr, false);
-		while ((ptr = localScriptIterator.findNext(MKID_BE('LSCR'))) != NULL) {
+		while ((ptr = localScriptIterator.findNext(MKTAG('L','S','C','R'))) != NULL) {
 			int id = 0;
 
 			ptr += _resourceHeaderSize;	/* skip tag & size */
@@ -403,18 +403,18 @@ void ScummEngine::setupRoomSubBlocks() {
 	}
 
 	// Locate the EGA palette (currently unused).
-	ptr = findResourceData(MKID_BE('EPAL'), roomptr);
+	ptr = findResourceData(MKTAG('E','P','A','L'), roomptr);
 	if (ptr)
 		_EPAL_offs = ptr - roomptr;
 
 	// Locate the standard room palette (for V3-V5 games).
-	ptr = findResourceData(MKID_BE('CLUT'), roomptr);
+	ptr = findResourceData(MKTAG('C','L','U','T'), roomptr);
 	if (ptr)
 		_CLUT_offs = ptr - roomptr;
 
 	// Locate the standard room palettes (for V6+ games).
 	if (_game.version >= 6) {
-		ptr = findResource(MKID_BE('PALS'), roomptr);
+		ptr = findResource(MKTAG('P','A','L','S'), roomptr);
 		if (ptr) {
 			_PALS_offs = ptr - roomptr;
 		}
@@ -425,7 +425,7 @@ void ScummEngine::setupRoomSubBlocks() {
 	if (_game.version == 8)
 		trans = (byte)READ_LE_UINT32(&(rmhd->v8.transparency));
 	else {
-		ptr = findResourceData(MKID_BE('TRNS'), roomptr);
+		ptr = findResourceData(MKTAG('T','R','N','S'), roomptr);
 		if (ptr)
 			trans = ptr[0];
 		else
@@ -434,7 +434,7 @@ void ScummEngine::setupRoomSubBlocks() {
 
 	// Actor Palette in HE 70 games
 	if (_game.heversion == 70) {
-		ptr = findResourceData(MKID_BE('REMP'), roomptr);
+		ptr = findResourceData(MKTAG('R','E','M','P'), roomptr);
 		if (ptr) {
 			for (i = 0; i < 256; i++)
 				_HEV7ActorPalette[i] = *ptr++;
@@ -485,7 +485,7 @@ void ScummEngine::resetRoomSubBlocks() {
 	_res->nukeResource(rtMatrix, 1);
 	_res->nukeResource(rtMatrix, 2);
 	if (_game.features & GF_SMALL_HEADER) {
-		ptr = findResourceData(MKID_BE('BOXD'), roomptr);
+		ptr = findResourceData(MKTAG('B','O','X','D'), roomptr);
 		if (ptr) {
 			byte numOfBoxes = *ptr;
 			int size;
@@ -506,21 +506,21 @@ void ScummEngine::resetRoomSubBlocks() {
 
 		}
 	} else {
-		ptr = findResourceData(MKID_BE('BOXD'), roomptr);
+		ptr = findResourceData(MKTAG('B','O','X','D'), roomptr);
 		if (ptr) {
 			int size = getResourceDataSize(ptr);
 			_res->createResource(rtMatrix, 2, size);
 			roomptr = getResourceAddress(rtRoom, _roomResource);
-			ptr = findResourceData(MKID_BE('BOXD'), roomptr);
+			ptr = findResourceData(MKTAG('B','O','X','D'), roomptr);
 			memcpy(getResourceAddress(rtMatrix, 2), ptr, size);
 		}
 
-		ptr = findResourceData(MKID_BE('BOXM'), roomptr);
+		ptr = findResourceData(MKTAG('B','O','X','M'), roomptr);
 		if (ptr) {
 			int size = getResourceDataSize(ptr);
 			_res->createResource(rtMatrix, 1, size);
 			roomptr = getResourceAddress(rtRoom, _roomResource);
-			ptr = findResourceData(MKID_BE('BOXM'), roomptr);
+			ptr = findResourceData(MKTAG('B','O','X','M'), roomptr);
 			memcpy(getResourceAddress(rtMatrix, 1), ptr, size);
 		}
 	}
@@ -531,7 +531,7 @@ void ScummEngine::resetRoomSubBlocks() {
 	for (i = 1; i < _res->num[rtScaleTable]; i++)
 		_res->nukeResource(rtScaleTable, i);
 
-	ptr = findResourceData(MKID_BE('SCAL'), roomptr);
+	ptr = findResourceData(MKTAG('S','C','A','L'), roomptr);
 	if (ptr) {
 		int s1, s2, y1, y2;
 		if (_game.version == 8) {
@@ -558,7 +558,7 @@ void ScummEngine::resetRoomSubBlocks() {
 	// Color cycling
 	// HE 7.0 games load resources but don't use them.
 	if (_game.version >= 4 && _game.heversion <= 62) {
-		ptr = findResourceData(MKID_BE('CYCL'), roomptr);
+		ptr = findResourceData(MKTAG('C','Y','C','L'), roomptr);
 		if (ptr) {
 			initCycl(ptr);
 		}
@@ -567,7 +567,7 @@ void ScummEngine::resetRoomSubBlocks() {
 #ifdef ENABLE_HE
 	// Polygons in HE 80+ games
 	if (_game.heversion >= 80) {
-		ptr = findResourceData(MKID_BE('POLD'), roomptr);
+		ptr = findResourceData(MKTAG('P','O','L','D'), roomptr);
 		if (ptr) {
 			((ScummEngine_v71he *)this)->_wiz->polygonLoad(ptr);
 		}
diff --git a/engines/scumm/saveload.cpp b/engines/scumm/saveload.cpp
index fb34255683..3bfe51a77b 100644
--- a/engines/scumm/saveload.cpp
+++ b/engines/scumm/saveload.cpp
@@ -154,7 +154,7 @@ void ScummEngine::requestLoad(int slot) {
 }
 
 static bool saveSaveGameHeader(Common::OutSaveFile *out, SaveGameHeader &hdr) {
-	hdr.type = MKID_BE('SCVM');
+	hdr.type = MKTAG('S','C','V','M');
 	hdr.size = 0;
 	hdr.ver = CURRENT_VER;
 
@@ -308,7 +308,7 @@ static bool loadSaveGameHeader(Common::SeekableReadStream *in, SaveGameHeader &h
 	hdr.size = in->readUint32LE();
 	hdr.ver = in->readUint32LE();
 	in->read(hdr.name, sizeof(hdr.name));
-	return !in->err() && hdr.type == MKID_BE('SCVM');
+	return !in->err() && hdr.type == MKTAG('S','C','V','M');
 }
 
 bool ScummEngine::loadState(int slot, bool compat) {
@@ -746,7 +746,7 @@ bool ScummEngine::loadInfos(Common::SeekableReadStream *file, SaveStateMetaInfos
 
 	SaveInfoSection section;
 	section.type = file->readUint32BE();
-	if (section.type != MKID_BE('INFO')) {
+	if (section.type != MKTAG('I','N','F','O')) {
 		return false;
 	}
 
@@ -793,7 +793,7 @@ bool ScummEngine::loadInfos(Common::SeekableReadStream *file, SaveStateMetaInfos
 
 void ScummEngine::saveInfos(Common::WriteStream* file) {
 	SaveInfoSection section;
-	section.type = MKID_BE('INFO');
+	section.type = MKTAG('I','N','F','O');
 	section.version = INFOSECTION_VERSION;
 	section.size = SaveInfoSectionSize;
 
diff --git a/engines/scumm/script.cpp b/engines/scumm/script.cpp
index c6c1f5f58f..9e02f126cd 100644
--- a/engines/scumm/script.cpp
+++ b/engines/scumm/script.cpp
@@ -174,7 +174,7 @@ int ScummEngine::getVerbEntrypoint(int obj, int entry) {
 	else if (_game.features & GF_SMALL_HEADER)
 		verbptr = objptr + 19;
 	else
-		verbptr = findResource(MKID_BE('VERB'), objptr);
+		verbptr = findResource(MKTAG('V','E','R','B'), objptr);
 
 	assert(verbptr);
 
@@ -921,7 +921,7 @@ void ScummEngine::runExitScript() {
 		// be limiting ourselves to strictly reading the size from the header?
 		if (_game.id == GID_INDY3 && !(_game.features & GF_OLD_BUNDLE)) {
 			byte *roomptr = getResourceAddress(rtRoom, _roomResource);
-			const byte *excd = findResourceData(MKID_BE('EXCD'), roomptr) - _resourceHeaderSize;
+			const byte *excd = findResourceData(MKTAG('E','X','C','D'), roomptr) - _resourceHeaderSize;
 			if (!excd || (getResourceDataSize(excd) < 1)) {
 				debug(2, "Exit-%d is empty", _roomResource);
 				return;
diff --git a/engines/scumm/script_v6.cpp b/engines/scumm/script_v6.cpp
index abe397ba7e..b2df1d0baa 100644
--- a/engines/scumm/script_v6.cpp
+++ b/engines/scumm/script_v6.cpp
@@ -3014,7 +3014,7 @@ void ScummEngine_v6::o6_setBoxSet() {
 
 	ResourceIterator boxds(room, false);
 	for (i = 0; i < arg; i++)
-		boxd = boxds.findNext(MKID_BE('BOXD'));
+		boxd = boxds.findNext(MKTAG('B','O','X','D'));
 
 	if (!boxd)
 		error("ScummEngine_v6::o6_setBoxSet: Can't find dboxes for set %d", arg);
@@ -3027,7 +3027,7 @@ void ScummEngine_v6::o6_setBoxSet() {
 
 	ResourceIterator boxms(room, false);
 	for (i = 0; i < arg; i++)
-		boxm = boxms.findNext(MKID_BE('BOXM'));
+		boxm = boxms.findNext(MKTAG('B','O','X','M'));
 
 	if (!boxm)
 		error("ScummEngine_v6::o6_setBoxSet: Can't find mboxes for set %d", arg);
diff --git a/engines/scumm/scumm.cpp b/engines/scumm/scumm.cpp
index 7b98c86506..5aea36ef66 100644
--- a/engines/scumm/scumm.cpp
+++ b/engines/scumm/scumm.cpp
@@ -1577,7 +1577,7 @@ void ScummEngine_v3::resetScumm() {
 		// Load tile set and palette for the distaff
 		byte *roomptr = getResourceAddress(rtRoom, 90);
 		assert(roomptr);
-		const byte *palPtr = findResourceData(MKID_BE('CLUT'), roomptr);
+		const byte *palPtr = findResourceData(MKTAG('C','L','U','T'), roomptr);
 		assert(palPtr - 4);
 		setPCEPaletteFromPtr(palPtr);
 		_gdi->_distaff = true;
diff --git a/engines/scumm/smush/imuse_channel.cpp b/engines/scumm/smush/imuse_channel.cpp
index a838fdba56..5af3c9ee8e 100644
--- a/engines/scumm/smush/imuse_channel.cpp
+++ b/engines/scumm/smush/imuse_channel.cpp
@@ -64,7 +64,7 @@ bool ImuseChannel::appendData(Common::SeekableReadStream &b, int32 size) {
 		assert(size > 8);
 		uint32 imus_type = b.readUint32BE();
 		/*uint32 imus_size =*/ b.readUint32BE();
-		if (imus_type != MKID_BE('iMUS'))
+		if (imus_type != MKTAG('i','M','U','S'))
 			error("Invalid Chunk for imuse_channel");
 		size -= 8;
 		_tbufferSize = size;
@@ -115,7 +115,7 @@ bool ImuseChannel::handleMap(byte *data) {
 		size -= 8;
 
 		switch (subType) {
-		case MKID_BE('FRMT'):
+		case MKTAG('F','R','M','T'):
 			if (subSize != 20)
 				error("invalid size for FRMT Chunk");
 			//uint32 imuse_start = READ_BE_UINT32(data);
@@ -125,14 +125,14 @@ bool ImuseChannel::handleMap(byte *data) {
 			_channels = READ_BE_UINT32(data+16);
 			assert(_channels == 1 || _channels == 2);
 			break;
-		case MKID_BE('TEXT'):
+		case MKTAG('T','E','X','T'):
 			// Ignore this
 			break;
-		case MKID_BE('REGN'):
+		case MKTAG('R','E','G','N'):
 			if (subSize != 8)
 				error("invalid size for REGN Chunk");
 			break;
-		case MKID_BE('STOP'):
+		case MKTAG('S','T','O','P'):
 			if (subSize != 4)
 				error("invalid size for STOP Chunk");
 			break;
@@ -201,13 +201,13 @@ bool ImuseChannel::handleSubTags(int32 &offset) {
 		uint32 size = READ_BE_UINT32(_tbuffer + offset + 4);
 		uint32 available_size = _tbufferSize - offset;
 		switch (type) {
-		case MKID_BE('MAP '):
+		case MKTAG('M','A','P',' '):
 			_inData = false;
 			if (available_size >= (size + 8)) {
 				handleMap((byte *)_tbuffer + offset);
 			}
 			break;
-		case MKID_BE('DATA'):
+		case MKTAG('D','A','T','A'):
 			_inData = true;
 			_dataSize = size;
 			offset += 8;
diff --git a/engines/scumm/smush/saud_channel.cpp b/engines/scumm/smush/saud_channel.cpp
index 94df70633f..04ed955224 100644
--- a/engines/scumm/smush/saud_channel.cpp
+++ b/engines/scumm/smush/saud_channel.cpp
@@ -50,7 +50,7 @@ bool SaudChannel::handleSubTags(int32 &offset) {
 		uint32 available_size = _tbufferSize - offset;
 
 		switch (type) {
-		case MKID_BE('STRK'):
+		case MKTAG('S','T','R','K'):
 			_inData = false;
 			if (available_size >= (size + 8)) {
 				int32 subSize = READ_BE_UINT32((byte *)_tbuffer + offset + 4);
@@ -60,14 +60,14 @@ bool SaudChannel::handleSubTags(int32 &offset) {
 			} else
 				return false;
 			break;
-		case MKID_BE('SMRK'):
+		case MKTAG('S','M','R','K'):
 			_inData = false;
 			if (available_size >= (size + 8))
 				_markReached = true;
 			else
 				return false;
 			break;
-		case MKID_BE('SHDR'):
+		case MKTAG('S','H','D','R'):
 			_inData = false;
 			if (available_size >= (size + 8)) {
 				int32 subSize = READ_BE_UINT32((byte *)_tbuffer + offset + 4);
@@ -76,7 +76,7 @@ bool SaudChannel::handleSubTags(int32 &offset) {
 			} else
 				return false;
 			break;
-		case MKID_BE('SDAT'):
+		case MKTAG('S','D','A','T'):
 			_inData = true;
 			_dataSize = size;
 			offset += 8;
@@ -123,7 +123,7 @@ bool SaudChannel::appendData(Common::SeekableReadStream &b, int32 size) {
 		assert(size > 8);
 		uint32 saud_type = b.readUint32BE();
 		/*uint32 saud_size =*/ b.readUint32BE();
-		if (saud_type != MKID_BE('SAUD'))
+		if (saud_type != MKTAG('S','A','U','D'))
 			error("Invalid Chunk for SaudChannel : %X", saud_type);
 		size -= 8;
 		_dataSize = -2;
diff --git a/engines/scumm/smush/smush_player.cpp b/engines/scumm/smush/smush_player.cpp
index fe2b9d99ff..0e4f588593 100644
--- a/engines/scumm/smush/smush_player.cpp
+++ b/engines/scumm/smush/smush_player.cpp
@@ -190,7 +190,7 @@ static StringResource *getStrings(ScummEngine *vm, const char *file, bool is_enc
 	theFile.read(filebuffer, length);
 	filebuffer[length] = 0;
 
-	if (is_encoded && READ_BE_UINT32(filebuffer) == MKID_BE('ETRS')) {
+	if (is_encoded && READ_BE_UINT32(filebuffer) == MKTAG('E','T','R','S')) {
 		assert(length > ETRS_HEADER_LENGTH);
 		length -= ETRS_HEADER_LENGTH;
 		for (int i = 0; i < length; ++i) {
@@ -507,7 +507,7 @@ void SmushPlayer::handleTextResource(uint32 subType, int32 subSize, Common::Seek
 
 	const char *str;
 	char *string = NULL, *string2 = NULL;
-	if (subType == MKID_BE('TEXT')) {
+	if (subType == MKTAG('T','E','X','T')) {
 		string = (char *)malloc(subSize - 16);
 		str = string;
 		b.read(string, subSize - 16);
@@ -845,40 +845,40 @@ void SmushPlayer::handleFrame(int32 frameSize, Common::SeekableReadStream &b) {
 		const int32 subSize = b.readUint32BE();
 		const int32 subOffset = b.pos();
 		switch (subType) {
-		case MKID_BE('NPAL'):
+		case MKTAG('N','P','A','L'):
 			handleNewPalette(subSize, b);
 			break;
-		case MKID_BE('FOBJ'):
+		case MKTAG('F','O','B','J'):
 			handleFrameObject(subSize, b);
 			break;
 #ifdef USE_ZLIB
-		case MKID_BE('ZFOB'):
+		case MKTAG('Z','F','O','B'):
 			handleZlibFrameObject(subSize, b);
 			break;
 #endif
-		case MKID_BE('PSAD'):
+		case MKTAG('P','S','A','D'):
 			if (!_compressedFileMode)
 				handleSoundFrame(subSize, b);
 			break;
-		case MKID_BE('TRES'):
+		case MKTAG('T','R','E','S'):
 			handleTextResource(subType, subSize, b);
 			break;
-		case MKID_BE('XPAL'):
+		case MKTAG('X','P','A','L'):
 			handleDeltaPalette(subSize, b);
 			break;
-		case MKID_BE('IACT'):
+		case MKTAG('I','A','C','T'):
 			handleIACT(subSize, b);
 			break;
-		case MKID_BE('STOR'):
+		case MKTAG('S','T','O','R'):
 			handleStore(subSize, b);
 			break;
-		case MKID_BE('FTCH'):
+		case MKTAG('F','T','C','H'):
 			handleFetch(subSize, b);
 			break;
-		case MKID_BE('SKIP'):
+		case MKTAG('S','K','I','P'):
 			_vm->_insane->procSKIP(subSize, b);
 			break;
-		case MKID_BE('TEXT'):
+		case MKTAG('T','E','X','T'):
 			handleTextResource(subType, subSize, b);
 			break;
 		default:
@@ -990,7 +990,7 @@ void SmushPlayer::parseNextFrame() {
 				const uint32 subType = _base->readUint32BE();
 				const int32 subSize = _base->readUint32BE();
 				const int32 subOffset = _base->pos();
-				assert(subType == MKID_BE('AHDR'));
+				assert(subType == MKTAG('A','H','D','R'));
 				handleAnimHeader(subSize, *_base);
 				_base->seek(subOffset + subSize, SEEK_SET);
 
@@ -1029,10 +1029,10 @@ void SmushPlayer::parseNextFrame() {
 	debug(3, "Chunk: %s at %x", tag2str(subType), subOffset);
 
 	switch (subType) {
-	case MKID_BE('AHDR'): // FT INSANE may seek file to the beginning
+	case MKTAG('A','H','D','R'): // FT INSANE may seek file to the beginning
 		handleAnimHeader(subSize, *_base);
 		break;
-	case MKID_BE('FRME'):
+	case MKTAG('F','R','M','E'):
 		handleFrame(subSize, *_base);
 		break;
 	default:
diff --git a/engines/scumm/sound.cpp b/engines/scumm/sound.cpp
index 0051319151..54f35c1969 100644
--- a/engines/scumm/sound.cpp
+++ b/engines/scumm/sound.cpp
@@ -206,7 +206,7 @@ void Sound::playSound(int soundID) {
 	// Support for SFX in Monkey Island 1, Mac version
 	// This is rather hackish right now, but works OK. SFX are not sounding
 	// 100% correct, though, not sure right now what is causing this.
-	else if (READ_BE_UINT32(ptr) == MKID_BE('Mac1')) {
+	else if (READ_BE_UINT32(ptr) == MKTAG('M','a','c','1')) {
 		// Read info from the header
 		size = READ_BE_UINT32(ptr+0x60);
 		rate = READ_BE_UINT16(ptr+0x64);
@@ -245,7 +245,7 @@ void Sound::playSound(int soundID) {
 		_mixer->playStream(Audio::Mixer::kSFXSoundType, NULL, stream, soundID);
 	}
 	// Support for sampled sound effects in Monkey Island 1 and 2
-	else if (_vm->_game.platform != Common::kPlatformFMTowns && READ_BE_UINT32(ptr) == MKID_BE('SBL ')) {
+	else if (_vm->_game.platform != Common::kPlatformFMTowns && READ_BE_UINT32(ptr) == MKTAG('S','B','L',' ')) {
 		debugC(DEBUG_SOUND, "Using SBL sound effect");
 
 		// SBL resources essentially contain VOC sound data.
@@ -316,7 +316,7 @@ void Sound::playSound(int soundID) {
 		stream = Audio::makeRawStream(sound, size, rate, Audio::FLAG_UNSIGNED);
 		_mixer->playStream(Audio::Mixer::kSFXSoundType, NULL, stream, soundID);			
 	}
-	else if (_vm->_game.platform != Common::kPlatformFMTowns && READ_BE_UINT32(ptr) == MKID_BE('SOUN')) {
+	else if (_vm->_game.platform != Common::kPlatformFMTowns && READ_BE_UINT32(ptr) == MKTAG('S','O','U','N')) {
 		if (_vm->_game.version != 3)
 			ptr += 2;
 
@@ -415,7 +415,7 @@ void Sound::playSound(int soundID) {
 			// Rather it seems that starting a new music is supposed to
 			// automatically stop the old song.
 			if (_vm->_imuse) {
-				if (READ_BE_UINT32(ptr) != MKID_BE('ASFX'))
+				if (READ_BE_UINT32(ptr) != MKTAG('A','S','F','X'))
 					_vm->_imuse->stopAllSounds();
 			}
 		}
@@ -1090,15 +1090,15 @@ int ScummEngine::readSoundResource(int idx) {
 	debugC(DEBUG_RESOURCE, "  basetag: %s, total_size=%d", tag2str(basetag), total_size);
 
 	switch (basetag) {
-	case MKID_BE('MIDI'):
-	case MKID_BE('iMUS'):
+	case MKTAG('M','I','D','I'):
+	case MKTAG('i','M','U','S'):
 		if (_musicType != MDT_PCSPK && _musicType != MDT_PCJR) {
 			_fileHandle->seek(-8, SEEK_CUR);
 			_fileHandle->read(_res->createResource(rtSound, idx, total_size + 8), total_size + 8);
 			return 1;
 		}
 		break;
-	case MKID_BE('SOU '):
+	case MKTAG('S','O','U',' '):
 		best_pri = -1;
 		while (pos < total_size) {
 			tag = _fileHandle->readUint32BE();
@@ -1108,32 +1108,32 @@ int ScummEngine::readSoundResource(int idx) {
 			pri = -1;
 
 			switch (tag) {
-			case MKID_BE('TOWS'):
+			case MKTAG('T','O','W','S'):
 				pri = 16;
 				break;
-			case MKID_BE('SBL '):
+			case MKTAG('S','B','L',' '):
 				pri = 15;
 				break;
-			case MKID_BE('ADL '):
+			case MKTAG('A','D','L',' '):
 				pri = 1;
 				if (_musicType == MDT_ADLIB)
 					pri = 10;
 				break;
-			case MKID_BE('AMI '):
+			case MKTAG('A','M','I',' '):
 				pri = 3;
 				break;
-			case MKID_BE('ROL '):
+			case MKTAG('R','O','L',' '):
 				pri = 3;
 				if (_native_mt32)
 					pri = 5;
 				break;
-			case MKID_BE('GMD '):
+			case MKTAG('G','M','D',' '):
 				pri = 4;
 				break;
-			case MKID_BE('MAC '):	// Occurs in Mac MI2, FOA
+			case MKTAG('M','A','C',' '):	// Occurs in Mac MI2, FOA
 				pri = 2;
 				break;
-			case MKID_BE('SPK '):
+			case MKTAG('S','P','K',' '):
 				pri = -1;
 //				if (_musicType == MDT_PCSPK || _musicType == MDT_PCJR)
 //					pri = 11;
@@ -1163,7 +1163,7 @@ int ScummEngine::readSoundResource(int idx) {
 			return 1;
 		}
 		break;
-	case MKID_BE('Mac0'):
+	case MKTAG('M','a','c','0'):
 		_fileHandle->seek(-12, SEEK_CUR);
 		total_size = _fileHandle->readUint32BE() - 8;
 		ptr = (byte *)calloc(total_size, 1);
@@ -1173,11 +1173,11 @@ int ScummEngine::readSoundResource(int idx) {
 		free(ptr);
 		return 1;
 
-	case MKID_BE('Mac1'):
-	case MKID_BE('RIFF'):
-	case MKID_BE('TALK'):
-	case MKID_BE('DIGI'):
-	case MKID_BE('Crea'):
+	case MKTAG('M','a','c','1'):
+	case MKTAG('R','I','F','F'):
+	case MKTAG('T','A','L','K'):
+	case MKTAG('D','I','G','I'):
+	case MKTAG('C','r','e','a'):
 	case 0x460e200d:	// WORKAROUND bug # 1311447
 		_fileHandle->seek(-12, SEEK_CUR);
 		total_size = _fileHandle->readUint32BE();
@@ -1186,7 +1186,7 @@ int ScummEngine::readSoundResource(int idx) {
 		//dumpResource("sound-", idx, ptr);
 		return 1;
 
-	case MKID_BE('HSHD'):
+	case MKTAG('H','S','H','D'):
 		// HE sound type without SOUN header
 		_fileHandle->seek(-16, SEEK_CUR);
 		total_size = max_total_size + 8;
@@ -1195,7 +1195,7 @@ int ScummEngine::readSoundResource(int idx) {
 		//dumpResource("sound-", idx, ptr);
 		return 1;
 
-	case MKID_BE('FMUS'): {
+	case MKTAG('F','M','U','S'): {
 		// Used in 3DO version of puttputt joins the parade and probably others
 		// Specifies a separate file to be used for music from what I gather.
 		int tmpsize;
@@ -1406,20 +1406,20 @@ static byte *writeVLQ(byte *ptr, int value) {
 static byte Mac0ToGMInstrument(uint32 type, int &transpose) {
 	transpose = 0;
 	switch (type) {
-	case MKID_BE('MARI'): return 12;
-	case MKID_BE('PLUC'): return 45;
-	case MKID_BE('HARM'): return 22;
-	case MKID_BE('PIPE'): return 19;
-	case MKID_BE('TROM'): transpose = -12; return 57;
-	case MKID_BE('STRI'): return 48;
-	case MKID_BE('HORN'): return 60;
-	case MKID_BE('VIBE'): return 11;
-	case MKID_BE('SHAK'): return 77;
-	case MKID_BE('PANP'): return 75;
-	case MKID_BE('WHIS'): return 76;
-	case MKID_BE('ORGA'): return 17;
-	case MKID_BE('BONG'): return 115;
-	case MKID_BE('BASS'): transpose = -24; return 35;
+	case MKTAG('M','A','R','I'): return 12;
+	case MKTAG('P','L','U','C'): return 45;
+	case MKTAG('H','A','R','M'): return 22;
+	case MKTAG('P','I','P','E'): return 19;
+	case MKTAG('T','R','O','M'): transpose = -12; return 57;
+	case MKTAG('S','T','R','I'): return 48;
+	case MKTAG('H','O','R','N'): return 60;
+	case MKTAG('V','I','B','E'): return 11;
+	case MKTAG('S','H','A','K'): return 77;
+	case MKTAG('P','A','N','P'): return 75;
+	case MKTAG('W','H','I','S'): return 76;
+	case MKTAG('O','R','G','A'): return 17;
+	case MKTAG('B','O','N','G'): return 115;
+	case MKTAG('B','A','S','S'): transpose = -24; return 35;
 	default:
 		error("Unknown Mac0 instrument %s found", tag2str(type));
 	}
@@ -1504,13 +1504,13 @@ static void convertMac0Resource(ResourceManager *res, int idx, byte *src_ptr, in
 
 	// Parse the three channels
 	for (i = 0; i < 3; i++) {
-		assert(READ_BE_UINT32(src_ptr) == MKID_BE('Chan'));
+		assert(READ_BE_UINT32(src_ptr) == MKTAG('C','h','a','n'));
 		len = READ_BE_UINT32(src_ptr + 4);
 		track_len[i] = len - 24;
 		track_instr[i] = Mac0ToGMInstrument(READ_BE_UINT32(src_ptr + 8), track_transpose[i]);
 		track_data[i] = src_ptr + 12;
 		src_ptr += len;
-		looped = (READ_BE_UINT32(src_ptr - 8) == MKID_BE('Loop'));
+		looped = (READ_BE_UINT32(src_ptr - 8) == MKTAG('L','o','o','p'));
 
 		// For each note event, we need up to 6 bytes for the
 		// Note On (3 VLQ, 3 event), and 6 bytes for the Note
diff --git a/engines/scumm/verbs.cpp b/engines/scumm/verbs.cpp
index e8f75dd901..6d5eb3fad7 100644
--- a/engines/scumm/verbs.cpp
+++ b/engines/scumm/verbs.cpp
@@ -1499,7 +1499,7 @@ void ScummEngine::drawVerbBitmap(int verb, int x, int y) {
 		}
 		imptr = getObjectImage(obim, 1);
 	} else {
-		const ImageHeader *imhd = (const ImageHeader *)findResourceData(MKID_BE('IMHD'), obim);
+		const ImageHeader *imhd = (const ImageHeader *)findResourceData(MKTAG('I','M','H','D'), obim);
 		if (_game.version >= 7) {
 			imgw = READ_LE_UINT16(&imhd->v7.width) / 8;
 			imgh = READ_LE_UINT16(&imhd->v7.height) / 8;
diff --git a/engines/sword1/control.h b/engines/sword1/control.h
index a6ccb09a04..2e5bfc7197 100644
--- a/engines/sword1/control.h
+++ b/engines/sword1/control.h
@@ -44,7 +44,7 @@ class Mouse;
 class Music;
 class Sound;
 
-#define SAVEGAME_HEADER MKID_BE('BS_1')
+#define SAVEGAME_HEADER MKTAG('B','S','_','1')
 #define SAVEGAME_VERSION 2
 
 #define MAX_BUTTONS 16
diff --git a/engines/sword1/screen.cpp b/engines/sword1/screen.cpp
index 24fd5b502f..1906fcb7fd 100644
--- a/engines/sword1/screen.cpp
+++ b/engines/sword1/screen.cpp
@@ -899,7 +899,7 @@ uint8* Screen::psxShrinkedBackgroundToIndexed(uint8 *psxBackground, uint32 bakXr
 	uint8 *fullres_buffer = (uint8 *)malloc(bakXres * (yresInTiles + 1) * 32);
 	memset(fullres_buffer, 0, bakXres * (yresInTiles + 1) * 32);
 
-	bool isCompressed = (READ_LE_UINT32(psxBackground) == MKID_BE('COMP'));
+	bool isCompressed = (READ_LE_UINT32(psxBackground) == MKTAG('C','O','M','P'));
 
 	totTiles -= xresInTiles;
 	psxBackground += 4; //We skip the id tag
diff --git a/engines/tinsel/sound.cpp b/engines/tinsel/sound.cpp
index 5fc2820986..a76d26eade 100644
--- a/engines/tinsel/sound.cpp
+++ b/engines/tinsel/sound.cpp
@@ -530,17 +530,17 @@ void SoundManager::openSampleFiles() {
 
 		// Detect format of soundfile by looking at 1st sample-index
 		switch (TO_BE_32(_sampleIndex[0])) {
-		case MKID_BE('MP3 '):
+		case MKTAG('M','P','3',' '):
 			debugC(DEBUG_DETAILED, kTinselDebugSound, "Detected MP3 sound-data");
 			_soundMode = kMP3Mode;
 			break;
 
-		case MKID_BE('OGG '):
+		case MKTAG('O','G','G',' '):
 			debugC(DEBUG_DETAILED, kTinselDebugSound, "Detected OGG sound-data");
 			_soundMode = kVorbisMode;
 			break;
 
-		case MKID_BE('FLAC'):
+		case MKTAG('F','L','A','C'):
 			debugC(DEBUG_DETAILED, kTinselDebugSound, "Detected FLAC sound-data");
 			_soundMode = kFLACMode;
 			break;
diff --git a/engines/toon/script.cpp b/engines/toon/script.cpp
index 376b1db621..0242ace7e3 100644
--- a/engines/toon/script.cpp
+++ b/engines/toon/script.cpp
@@ -70,7 +70,7 @@ EMCInterpreter::~EMCInterpreter() {
 
 bool EMCInterpreter::callback(Common::IFFChunk &chunk) {
 	switch (chunk._type) {
-	case MKID_BE('TEXT'):
+	case MKTAG('T','E','X','T'):
 		delete[] _scriptData->text;
 		_scriptData->text = new byte[chunk._size];
 		assert(_scriptData->text);
@@ -78,7 +78,7 @@ bool EMCInterpreter::callback(Common::IFFChunk &chunk) {
 			error("Couldn't read TEXT chunk from file '%s'", _filename);
 		break;
 
-	case MKID_BE('ORDR'):
+	case MKTAG('O','R','D','R'):
 		delete[] _scriptData->ordr;
 		_scriptData->ordr = new uint16[chunk._size >> 1];
 		assert(_scriptData->ordr);
@@ -89,7 +89,7 @@ bool EMCInterpreter::callback(Common::IFFChunk &chunk) {
 			_scriptData->ordr[i] = READ_BE_UINT16(&_scriptData->ordr[i]);
 		break;
 
-	case MKID_BE('DATA'):
+	case MKTAG('D','A','T','A'):
 		delete[] _scriptData->data;
 		_scriptData->data = new uint16[chunk._size >> 1];
 		assert(_scriptData->data);
diff --git a/engines/toon/script.h b/engines/toon/script.h
index 2a74f9084f..b6d28e1171 100644
--- a/engines/toon/script.h
+++ b/engines/toon/script.h
@@ -87,9 +87,9 @@ public:
 		// Both lead to some problems in our IFF parser, either reading after the end
 		// of file or producing a "Chunk overread" error message. To work around this
 		// we need to adjust the size field properly.
-		if (_formType == MKID_BE('EMC2'))
+		if (_formType == MKTAG('E','M','C','2'))
 			_formChunk.size -= 8;
-		else if (_formType == MKID_BE('AVFS'))
+		else if (_formType == MKTAG('A','V','F','S'))
 			_formChunk.size += 4;
 	}
 };