diff --git a/RomPatcher.js b/RomPatcher.js
index b30d73e..3d47f90 100644
--- a/RomPatcher.js
+++ b/RomPatcher.js
@@ -1,4 +1,4 @@
-/* ips-patcher.js v20170722 - Marc Robledo 2016-2017 - http://www.marcrobledo.com/license */
+/* RomPatcher.js v20171102 - Marc Robledo 2016-2017 - http://www.marcrobledo.com/license */
 var MAX_ROM_SIZE=33554432;
 var romFile, patch, romFile1, romFile2, tempFile, romHashes={};
 /* Shortcuts */
@@ -54,10 +54,12 @@ function _readPatchFile(){
 		patch=readUPSFile(tempFile);
 	}else if(tempFile.readString(0,5)===APS_MAGIC){
 		patch=readAPSFile(tempFile);
+	}else if(tempFile.readString(0,4)===BPS_MAGIC){
+		patch=readBPSFile(tempFile);
 	}/*else if(tempFile.readString(0,4)===APSGBA_MAGIC){
 		patch=readAPSGBAFile(tempFile);
 	}*/else {
-		MarcDialogs.alert('Invalid IPS/UPS/APS file');
+		MarcDialogs.alert('Invalid IPS/UPS/APS/BPS file');
 	}
 }
 function openPatchFile(f){tempFile=new MarcBinFile(f, _readPatchFile)}
@@ -74,7 +76,7 @@ function applyPatchFile(p,r){
 
 
 function createPatchFile(){
-	var MODES=['ips','ups','aps','apsn64'/*,'apsgba'*/];
+	var MODES=['ips','ups','aps','apsn64'/*,'apsgba','bps'*/];
 	var mode=0;
 	for(var i=0; i<MODES.length && !mode; i++)
 		if(el('radio-'+MODES[i]).checked)
@@ -100,6 +102,8 @@ function createPatchFile(){
 		newPatch=createAPSFromFiles(romFile1, romFile2, true);
 	}else if(mode==='apsgba'){
 		newPatch=createAPSGBAFromFiles(romFile1, romFile2);
+	}else if(mode==='bps'){
+		newPatch=createBPSFromFiles(romFile1, romFile2);
 	}
 	newPatch.export().save();
 }
diff --git a/bps.js b/bps.js
new file mode 100644
index 0000000..0522b5c
--- /dev/null
+++ b/bps.js
@@ -0,0 +1,172 @@
+/* BPS module for RomPatcher.js v20171103	 - Marc Robledo 2016-2017 - http://www.marcrobledo.com/license */
+/* File format specification: https://www.romhacking.net/documents/746/ */
+
+var BPS_MAGIC='BPS1';
+var BPS_ACTION_SOURCE_READ=0;
+var BPS_ACTION_TARGET_READ=1;
+var BPS_ACTION_SOURCE_COPY=2;
+var BPS_ACTION_TARGET_COPY=3;
+
+
+function BPS(){
+	this.sourceSize=0;
+	this.targetSize=0;
+	this.metaData='';
+	this.actionsOffset=0;
+	this.file=null;
+	this.sourceChecksum=0;
+	this.targetChecksum=0;
+	this.patchChecksum=0;
+}
+BPS.prototype.toString=function(){
+	var s='Source size: '+this.sourceSize;
+	s+='\Target size: '+this.targetSize;
+	s+='\nMetadata: '+this.metaData;
+	s+='\nActions offset: '+this.actionsOffset;
+	return s
+}
+/*BPS.prototype.export=function(){
+
+}*/
+BPS.prototype.apply=function(romFile){
+	if(this.sourceChecksum!==crc32(romFile,false)){
+		MarcDialogs.alert('Warning: invalid source ROM checksum');
+	}
+	
+	
+	// first we determine target file size
+	var newFileSize=0;
+	var seek=this.actionsOffset;
+	while(seek<(this.file.fileSize-12)){
+		var data=decodeBPS(this.file, seek);
+		var action={type: data.number & 3, length: (data.number >> 2)+1};
+		seek+=data.length;
+
+		newFileSize+=action.length;
+		if(action.type===BPS_ACTION_TARGET_READ){
+			seek+=action.length;
+		}else if(action.type===BPS_ACTION_SOURCE_COPY || action.type===BPS_ACTION_TARGET_COPY){
+			seek+=decodeBPS(this.file, seek).length;
+		}
+	}
+	tempFile=new MarcBinFile(newFileSize);
+
+
+	//patch
+	var outputOffset=0;
+	var sourceRelativeOffset=0;
+	var targetRelativeOffset=0;
+	seek=this.actionsOffset;
+	while(seek<(this.file.fileSize-12)){
+		var data=decodeBPS(this.file, seek);
+		var action={type: data.number & 3, length: (data.number >> 2)+1};
+		//console.log('0x'+seek.toString(16)+' - action: '+action.type+':'+action.length);
+		seek+=data.length;
+
+		if(action.type===BPS_ACTION_SOURCE_READ){
+			tempFile.writeBytes(outputOffset, romFile.readBytes(outputOffset, action.length));
+			outputOffset+=action.length;
+
+		}else if(action.type===BPS_ACTION_TARGET_READ){
+			tempFile.writeBytes(outputOffset, this.file.readBytes(seek, action.length));
+			outputOffset+=action.length;
+			seek+=action.length;
+
+		}else if(action.type===BPS_ACTION_SOURCE_COPY){
+			var data2=decodeBPS(this.file, seek);
+			seek+=data2.length;
+			sourceRelativeOffset+=(data2.number & 1 ? -1 : +1) * (data2.number >> 1);
+			while(action.length--){
+				tempFile.writeByte(outputOffset, romFile.readByte(sourceRelativeOffset));
+				outputOffset++;
+				sourceRelativeOffset++;
+			}
+		}else if(action.type===BPS_ACTION_TARGET_COPY){
+			var data2=decodeBPS(this.file, seek);
+			seek+=data2.length;
+			targetRelativeOffset += (data2.number & 1 ? -1 : +1) * (data2.number >> 1);
+			while(action.length--) {
+				tempFile.writeByte(outputOffset, tempFile.readByte(targetRelativeOffset));
+				outputOffset++;
+				targetRelativeOffset++;
+			}
+		}
+	}
+
+	if(this.targetChecksum!==crc32(tempFile,false)){
+		MarcDialogs.alert('Warning: invalid target ROM checksum');
+	}
+
+	return tempFile
+}
+
+
+
+function readBPSFile(file){
+	file.littleEndian=true;
+	var patchFile=new BPS();
+
+	var seek=4; //skip BPS1
+	var decodedSourceSize=decodeBPS(file, seek);
+	patchFile.sourceSize=decodedSourceSize.number;
+	seek+=decodedSourceSize.length;
+	var decodedTargetSize=decodeBPS(file, seek);
+	patchFile.targetSize=decodedTargetSize.number;
+	seek+=decodedTargetSize.length;
+
+	var decodedMetaDataLength=decodeBPS(file, seek);
+	seek+=decodedMetaDataLength.length;
+	patchFile.metaData=file.readString(seek, decodedMetaDataLength.length);
+	seek+=patchFile.metaData.length;
+
+	patchFile.actionsOffset=seek;
+	patchFile.file=file;
+
+	patchFile.sourceChecksum=file.readInt(file.fileSize-12);
+	patchFile.targetChecksum=file.readInt(file.fileSize-8);
+	patchFile.patchChecksum=file.readInt(file.fileSize-4);
+
+	if(patchFile.patchChecksum!==crc32(file,true)){
+		MarcDialogs.alert('Warning: invalid patch checksum');
+	}
+
+
+	return patchFile;
+}
+
+
+/*function createBPSFromFiles(original, modified){
+	
+}*/
+
+
+/*function encodeBPS(number){
+	number=number>>>0;
+	var dataBytes=[];
+	while(true){
+		var x = number & 0x7f;
+		number >>= 7;
+		if(number == 0){
+			dataBytes.push(0x80 | x);
+			break;
+		}
+		dataBytes.push(x);
+		number--;
+	}
+	return dataBytes;
+}*/
+function decodeBPS(dataBytes, i){
+	var number = 0, shift = 1;
+	var len=0;
+	while(true){
+		var x = dataBytes.readByte(i);
+		i++;
+		len++;
+		number += (x & 0x7f) * shift;
+		if(x & 0x80)
+			break;
+		shift <<= 7;
+		number += shift;
+	}
+	return {number:number,length:len};
+}
\ No newline at end of file
diff --git a/index.html b/index.html
index b7c3399..c882ef6 100644
--- a/index.html
+++ b/index.html
@@ -12,6 +12,8 @@
 	<script type="text/javascript" src="./ips.js"></script>
 	<script type="text/javascript" src="./ups.js"></script>
 	<script type="text/javascript" src="./aps.js"></script>
+	<!-- <script type="text/javascript" src="./apsgba.js"></script> -->
+	<script type="text/javascript" src="./bps.js"></script>
 	<script type="text/javascript" src="./ByteFlipper.js"></script>
 </head>
 <body>
@@ -35,7 +37,7 @@
 <!-- APP -->
 <div class="wrapper" id="the-app">
 	<h3 class="red">Apply patch</h3>
-	<div class="container-description">Apply an IPS/UPS patch to your ROM</div>
+	<div class="container-description">Apply a patch to your ROM</div>
 	<div class="container">
 		<div class="row">
 			<div class="six columns text-right"><label for="input-file-rom">ROM file:</label></div>
@@ -46,7 +48,7 @@
 		</div>
 
 		<div class="row">
-			<div class="six columns text-right"><label for="input-file-patch">Patch file (IPS/UPS/APS):</label></div>
+			<div class="six columns text-right"><label for="input-file-patch">Patch file <small>(IPS/UPS/APS/BPS)</small>:</label></div>
 			<div class="six columns">
 				<input type="file" id="input-file-patch" />
 			</div>
@@ -60,7 +62,7 @@
 
 
 	<h3 class="blue">Create patch</h3>
-	<div class="container-description">Create an IPS/UPS/APS patch from two different ROMs </div>
+	<div class="container-description">Create a patch from two different ROMs </div>
 	<div class="container">
 		<div class="row">
 			<div class="six columns text-right"><label for="input-file-rom1">Original ROM:</label></div>
@@ -83,6 +85,7 @@
 				<input type="radio" id="radio-ups" name="patch-type" /><label for="radio-ups">UPS</label>
 				<input type="radio" id="radio-aps" name="patch-type" /><label for="radio-aps">APS</label>
 				<input type="radio" id="radio-apsn64" name="patch-type" /><label for="radio-apsn64">APS (N64)</label>
+				<!-- <input type="radio" id="radio-bps" name="patch-type" /><label for="radio-bps">BPS</label> -->
 			</div>
 		</div>
 
@@ -94,7 +97,7 @@
 
 
 	<h3 class="green">Byte flipper</h3>
-	<div class="container-description">This tool can flip bytes on a file in order to change its endianness</div>
+	<div class="container-description">This tool flips bytes in a file in order to change its endianness</div>
 	<div class="container">
 		<div class="row">
 			<div class="six columns text-right"><label for="input-file-flip">File</label></div>
diff --git a/ips-patcher.appcache b/ips-patcher.appcache
deleted file mode 100644
index be07f02..0000000
--- a/ips-patcher.appcache
+++ /dev/null
@@ -1,17 +0,0 @@
-CACHE MANIFEST
-#v20170723
-# WARNING: THIS FILE WILL BE DEPRECATED
-#CACHE:
-index.html
-RomPatcher.css
-RomPatcher.js
-favicon.png
-logo.png
-ips.js
-ups.js
-aps.js
-ByteFlipper.js
-
-# force these files to be loaded in network
-NETWORK:
-*
\ No newline at end of file
diff --git a/manifest.appcache b/manifest.appcache
index 82ea24a..6f76606 100644
--- a/manifest.appcache
+++ b/manifest.appcache
@@ -1,5 +1,5 @@
 CACHE MANIFEST
-#v20171021
+#v20171103
 #CACHE:
 index.html
 RomPatcher.css
@@ -9,6 +9,7 @@ logo.png
 ips.js
 ups.js
 aps.js
+bps.js
 ByteFlipper.js
 
 # force these files to be loaded in network