diff --git a/.dir-locals.el b/.dir-locals.el
new file mode 100644
index 0000000..1f84612
--- /dev/null
+++ b/.dir-locals.el
@@ -0,0 +1,5 @@
+;;; Directory Local Variables
+;;; For more information see (info "(emacs) Directory Variables")
+
+((js-mode
+  (js2-basic-offset . 2)))
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..4652136
--- /dev/null
+++ b/README.md
@@ -0,0 +1,154 @@
+# Name #
+
+js-emulators
+
+# Synopsis #
+
+The goal of this little project is to make it easy to embed a
+javascript-based emulator in your own webpage. It downloads the files
+you specify (with aprogress ui to show what is happening), arranges
+them to form a filesystem, constructs the necessary arguments for the
+emulator, handles transitions to and from full-screen mode, and
+detects and enables game pads.
+
+To use this project you'll need to provide it with a canvas element,
+styled as necessary so that it has the correct size on screen (the
+program will be scaled up automatically to fit, controlling for aspect
+ratio). You will also likely want to provide a simple UI for entering
+full-screen mode or muting the audio; these can simply call methods on
+the emulator when activated.
+
+# Emulator API #
+
+The `Emulator` constructor takes three arguments: a canvas element, an
+optional callback (which will be called after fully initializing the
+emulator but just before it starts running the emulated program), and
+a config (as detailed below) or a function which returns a `Promise`
+of a config.
+
+# Configuration #
+
+## Examples ##
+
+### Arcade game ###
+
+Loads the emulator for the arcade game 1943, and gives it a compressed
+copy of the rom (which it loads from examples/1943.zip).
+
+      var emulator = new Emulator(document.querySelector("#canvas"),
+                                  null,
+                                  new JSMAMELoader(JSMAMELoader.driver("1943"),
+                                                   JSMAMELoader.nativeResolution(224, 256),
+                                                   JSMAMELoader.emulatorJS("emulators/mess1943.js"),
+                                                   JSMAMELoader.mountFile("1943.zip",
+                                                                          JSMAMELoader.fetchFile("Game File",
+                                                                                                 "examples/1943.zip"))))
+      emulator.setScale(3);
+      emulator.start({ waitAfterDownloading: true });
+
+### Console game for Atari 2600 ###
+
+Loads the emulator for the Atari 2600 console, and an image of a
+catridge for Pitfall. Notice how we download the image, storing it in
+a file, then set up a "cart" peripheral so that the emulator can find
+it. We also load a configuration file that preconfigures some
+keybindings needed to use the 2600.
+
+      var emulator = new Emulator(document.querySelector("#canvas"),
+                                  null,
+                                  new JSMESSLoader(JSMESSLoader.driver("a2600"),
+                                                   JSMESSLoader.nativeResolution(352, 223),
+                                                   JSMESSLoader.emulatorJS("emulators/messa2600.js"),
+                                                   JSMESSLoader.mountFile("Pitfall_Activision_1982.bin",
+                                                                          JSMESSLoader.fetchFile("Game File",
+                                                                                                 "examples/Pitfall_Activision_1982.bin")),
+                                                   JSMESSLoader.mountFile("a2600.cfg",
+                                                                          JSMESSLoader.fetchFile("Config File",
+                                                                                                 "examples/a2600.cfg")),
+                                                   JSMESSLoader.peripheral("cart", "Pitfall_Activision_1982.bin")))
+      emulator.setScale(3).start({ waitAfterDownloading: true });
+
+### DOS game ###
+
+Here we load the dosbox emulator, and a zip file containing the game
+ZZT which we decompress and then mount as the C drive. We also tell
+DosBox to immediately start running zzt.exe, which is inside the zip.
+
+      var emulator = new Emulator(document.querySelector("#canvas"),
+                                  null,
+                                  new DosBoxLoader(DosBoxLoader.emulatorJS("emulators/dosbox.js"),
+                                                   DosBoxLoader.nativeResolution(640, 400),
+                                                   DosBoxLoader.mountZip("c",
+                                                                         DosBoxLoader.fetchFile("Game File",
+                                                                                                "examples/Zzt_1991_Epic_Megagames_Inc.zip")),
+                                                   DosBoxLoader.startExe("zzt.exe")))
+      emulator.start({ waitAfterDownloading: true });
+
+## Configuration API ##
+
+Currently there are two supported emulators, JSMESS and
+EM-DosBox. JSMESS provides emulation for arcade games, consoles, and
+early personal computers. As this emulator supports such a wide
+variety of hardware it has been broken up into several dozen emulators
+each supporting one machine lest the resulting javascript be
+intractably large (60+ megabytes). EM-DosBox provides emulation for
+software that runs on x86 PCs using the DOS operating systems common
+to the era.
+
+Each of these is configured by calling a constructor function and
+providing it with arguments formed by calling static methods on that
+same constructor.
+
+### Common ###
+
+* `emulatorJS(url)`
+* `mountZip(drive, file)`
+* `mountFile(filename, file)`
+* `fetchFile(url)`
+* `fetchOptionalFile(url)`
+* `localFile(data)`
+
+### JSMESS ###
+
+* `driver(driverName)`
+* `extraArgs(args)`
+* `peripheral(name, filename)`
+
+### JSMAME ###
+
+* `driver(driverName)`
+* `extraArgs(args)`
+
+### EM-DosBox ###
+
+* `startExe(filename)`
+
+## Internet Archive ##
+
+There's also a helper for loading software from
+[the Internet Archive](https://archive.org/v2), `IALoader`. IALoader
+looks at the metadata associated with an Internet Archive item and
+uses that to build the configuration for the emulator.
+
+## Examples ##
+
+    var emulator = new IALoader(document.querySelector("#canvas"),
+                                "Pitfall_Activision_1982/Pitfall_Activision_1982.bin");
+
+# Runtime API #
+
+Once you have an emulator object, there are several methods you can call.
+
+* `start()`
+* `requestFullScreen()`
+* `mute()`
+* `setSplashColors()`
+* others…
+
+# Known Bugs #
+
+* splash screen doesn't always fit inside the canvas
+* need to improve the download progress indicators
+* browser feature detection for volume/mute/full-screen
+* handling of aspect ratios, and their interaction with full-screen mode
+* finish API for volume/mute/full-screen requests
diff --git a/browserfs.js b/browserfs.js
new file mode 100644
index 0000000..eacbb24
--- /dev/null
+++ b/browserfs.js
@@ -0,0 +1,5 @@
+!function(){if(Date.now||(Date.now=function(){return(new Date).getTime()}),Array.isArray||(Array.isArray=function(t){return"[object Array]"===Object.prototype.toString.call(t)}),Object.keys||(Object.keys=function(){var t=Object.prototype.hasOwnProperty,e=!{toString:null}.propertyIsEnumerable("toString"),n=["toString","toLocaleString","valueOf","hasOwnProperty","isPrototypeOf","propertyIsEnumerable","constructor"],r=n.length;return function(i){if("object"!=typeof i&&("function"!=typeof i||null===i))throw new TypeError("Object.keys called on non-object");var o,a,s=[];for(o in i)t.call(i,o)&&s.push(o);if(e)for(a=0;r>a;a++)t.call(i,n[a])&&s.push(n[a]);return s}}()),"b"!=="ab".substr(-1)&&(String.prototype.substr=function(t){return function(e,n){return 0>e&&(e=this.length+e),t.call(this,e,n)}}(String.prototype.substr)),Array.prototype.forEach||(Array.prototype.forEach=function(t,e){for(var n=0;n<this.length;++n)n in this&&t.call(e,this[n],n,this)}),"undefined"==typeof setImmediate){var 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r=e.length>n.length?n.length:e.length,i=0;r>i;i++){var o=e.charCodeAt(i);if(o>127){var a=t.extendedChars.indexOf(e.charAt(i));a>-1&&(o=a+128)}n.writeUInt8(o,i)}return r},t.byte2str=function(e){for(var n=new Array(e.length),r=0;r<e.length;r++){var i=e.readUInt8(r);n[r]=i>127?t.extendedChars[i-128]:String.fromCharCode(i)}return n.join("")},t.byteLength=function(t){return t.length},t.extendedChars=["Ç","ü","é","â","ä","à","å","ç","ê","ë","è","ï","î","ì","Ä","Å","É","æ","Æ","ô","ö","ò","û","ù","ÿ","Ö","Ü","ø","£","Ø","×","ƒ","á","í","ó","ú","ñ","Ñ","ª","º","¿","®","¬","½","¼","¡","«","»","_","_","_","¦","¦","Á","Â","À","©","¦","¦","+","+","¢","¥","+","+","-","-","+","-","+","ã","Ã","+","+","-","-","¦","-","+","¤","ð","Ð","Ê","Ë","È","i","Í","Î","Ï","+","+","_","_","¦","Ì","_","Ó","ß","Ô","Ò","õ","Õ","µ","þ","Þ","Ú","Û","Ù","ý","Ý","¯","´","­","±","_","¾","¶","§","÷","¸","°","¨","·","¹","³","²","_"," "],t}();e.ExtendedASCII=o;var a=function(){function t(){}return 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s=t.b642num[e.charAt(o++)],u=t.b642num[e.charAt(o++)],f=t.b642num[e.charAt(o++)],c=t.b642num[e.charAt(o++)],p=s<<2|u>>4,h=(15&u)<<4|f>>2,l=(3&f)<<6|c;if(n.writeUInt8(p,a++),a===r)break;if(64!==f&&(i+=n.writeUInt8(h,a++)),a===r)break;if(64!==c&&(i+=n.writeUInt8(l,a++)),a===r)break}return a},t.byteLength=function(t){return Math.floor(6*t.replace(/[^A-Za-z0-9\+\/\-\_]/g,"").length/8)},t.b64chars=["A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z","a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z","0","1","2","3","4","5","6","7","8","9","+","/","="],t.num2b64=function(){for(var e=new Array(t.b64chars.length),n=0;n<t.b64chars.length;n++){var r=t.b64chars[n];e[n]=r}return e}(),t.b642num=function(){for(var e={},n=0;n<t.b64chars.length;n++){var r=t.b64chars[n];e[r]=n}return e["-"]=62,e._=63,e}(),t}();e.BASE64=s;var u=function(){function t(){}return t.str2byte=function(t,e){var n=t.length;2*n>e.length&&(n=1===e.length%2?(e.length-1)/2:e.length/2);for(var r=0;n>r;r++)e.writeUInt16LE(t.charCodeAt(r),2*r);return 2*n},t.byte2str=function(t){if(0!==t.length%2)throw new Error("Invalid UCS2 byte array.");for(var e=new Array(t.length/2),n=0;n<t.length;n+=2)e[n/2]=String.fromCharCode(t.readUInt8(n)|t.readUInt8(n+1)<<8);return e.join("")},t.byteLength=function(t){return 2*t.length},t}();e.UCS2=u;var f=function(){function t(){}return t.str2byte=function(t,e){if(1===t.length%2)throw new Error("Invalid hex string");var n=t.length>>1;n>e.length&&(n=e.length);for(var r=0;n>r;r++){var i=this.hex2num[t.charAt(r<<1)],o=this.hex2num[t.charAt((r<<1)+1)];e.writeUInt8(i<<4|o,r)}return n},t.byte2str=function(t){for(var e=t.length,n=new Array(e<<1),r=0,i=0;e>i;i++){var o=15&t.readUInt8(i),a=t.readUInt8(i)>>4;n[r++]=this.num2hex[a],n[r++]=this.num2hex[o]}return n.join("")},t.byteLength=function(t){return t.length>>1},t.HEXCHARS="0123456789abcdef",t.num2hex=function(){for(var e=new Array(t.HEXCHARS.length),n=0;n<t.HEXCHARS.length;n++){var r=t.HEXCHARS[n];e[n]=r}return e}(),t.hex2num=function(){var e,n,r={};for(e=0;e<t.HEXCHARS.length;e++)n=t.HEXCHARS[e],r[n]=e;var i="ABCDEF";for(e=0;e<i.length;e++)n=i[e],r[n]=e+10;return r}(),t}();e.HEX=f;var c=function(){function t(){}return t.str2byte=function(e,n){if(0===e.length)return 0;var r=t.byteLength(e);r>n.length&&(r=n.length);var i=0,o=0,a=o+r,s=e.charCodeAt(i++);0!==s&&(n.writeUInt8(255&s,0),o=1);for(var u=o;a>u;u+=2){var f=e.charCodeAt(i++);1===a-u&&n.writeUInt8(f>>8,u),a-u>=2&&n.writeUInt16BE(f,u)}return r},t.byte2str=function(t){var e=t.length;if(0===e)return"";for(var n=new Array((e>>1)+1),r=0,i=0;i<n.length;i++)n[i]=0===i?1===e%2?String.fromCharCode(256|t.readUInt8(r++)):String.fromCharCode(0):String.fromCharCode(t.readUInt8(r++)<<8|t.readUInt8(r++));return n.join("")},t.byteLength=function(t){if(0===t.length)return 0;var e=t.charCodeAt(0),n=t.length-1<<1;return 0!==e&&n++,n},t}();e.BINSTR=c;var p=function(){function t(){}return t.str2byte=function(t,e){for(var n=t.length>e.length?e.length:t.length,r=0;n>r;r++)e.writeUInt8(t.charCodeAt(r)-32,r);return n},t.byte2str=function(t){for(var e=new Array(t.length),n=0;n<t.length;n++)e[n]=String.fromCharCode(t.readUInt8(n)+32);return e.join("")},t.byteLength=function(t){return t.length},t}();e.BINSTRIE=p}),u("core/buffer",["require","exports","./buffer_core","./buffer_core_array","./buffer_core_arraybuffer","./buffer_core_imagedata","./string_util"],function(t,e,n,r,i,o,a){var s=[i.BufferCoreArrayBuffer,o.BufferCoreImageData,r.BufferCoreArray],u=function(){var t,e;for(t=0;t<s.length;t++)if(e=s[t],e.isAvailable())return e;throw new Error("This browser does not support any available BufferCore implementations.")}(),f=function(){function t(e,r,o){"undefined"==typeof r&&(r="utf8"),this.offset=0;var a;if(!(this instanceof t))return new t(e,r);if(e instanceof n.BufferCoreCommon){this.data=e;var s="number"==typeof r?r:0,f="number"==typeof 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this.offset},t.prototype.set=function(t,e){return 0>e?this.writeInt8(e,t):this.writeUInt8(e,t)},t.prototype.get=function(t){return this.readUInt8(t)},t.prototype.write=function(e,n,r,i){if("undefined"==typeof n&&(n=0),"undefined"==typeof r&&(r=this.length),"undefined"==typeof i&&(i="utf8"),"string"==typeof n?(i=""+n,n=0,r=this.length):"string"==typeof r&&(i=""+r,r=this.length),n>=this.length)return 0;var o=a.FindUtil(i);return r=r+n>this.length?this.length-n:r,n+=this.offset,o.str2byte(e,0===n&&r===this.length?this:new t(this.data,n,r+n))},t.prototype.toString=function(e,n,r){if("undefined"==typeof e&&(e="utf8"),"undefined"==typeof n&&(n=0),"undefined"==typeof r&&(r=this.length),!(r>=n))throw new Error("Invalid start/end positions: "+n+" - "+r);if(n===r)return"";r>this.length&&(r=this.length);var i=a.FindUtil(e);return i.byte2str(0===n&&r===this.length?this:new t(this.data,n+this.offset,r+this.offset))},t.prototype.toJSON=function(){for(var t=this.length,e=new Array(t),n=0;t>n;n++)e[n]=this.readUInt8(n);return{type:"Buffer",data:e}},t.prototype.copy=function(t,e,n,r){if("undefined"==typeof e&&(e=0),"undefined"==typeof n&&(n=0),"undefined"==typeof r&&(r=this.length),e=0>e?0:e,n=0>n?0:n,n>r)throw new RangeError("sourceEnd < sourceStart");if(r===n)return 0;if(e>=t.length)throw new RangeError("targetStart out of bounds");if(n>=this.length)throw new RangeError("sourceStart out of bounds");if(r>this.length)throw new RangeError("sourceEnd out of bounds");for(var i=Math.min(r-n,t.length-e,this.length-n),o=0;i>o;o++)t.writeUInt8(this.readUInt8(n+o),e+o);return i},t.prototype.slice=function(e,n){if("undefined"==typeof e&&(e=0),"undefined"==typeof n&&(n=this.length),0>e&&(e+=this.length,0>e&&(e=0)),0>n&&(n+=this.length,0>n&&(n=0)),n>this.length&&(n=this.length),e>n&&(e=n),0>e||0>n||e>=this.length||n>this.length)throw new Error("Invalid slice indices.");return new 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2:return this.unlinkSync(t),this.createFileSync(t,e,r.mode);case 0:return this.openFileSync(t,e);default:throw new a(9,"Invalid FileFlag object.")}},t.prototype.unlink=function(t,e){e(new a(14))},t.prototype.unlinkSync=function(){throw new a(14)},t.prototype.rmdir=function(t,e){e(new a(14))},t.prototype.rmdirSync=function(){throw new a(14)},t.prototype.mkdir=function(t,e,n){n(new a(14))},t.prototype.mkdirSync=function(){throw new a(14)},t.prototype.readdir=function(t,e){e(new a(14))},t.prototype.readdirSync=function(){throw new a(14)},t.prototype.exists=function(t,e){this.stat(t,null,function(t){e(null==t)})},t.prototype.existsSync=function(t){try{return this.statSync(t,!0),!0}catch(e){return!1}},t.prototype.realpath=function(t,e,n){if(this.supportsLinks())for(var r=t.split(s.sep),i=0;i<r.length;i++){var o=r.slice(0,i+1);r[i]=s.join.apply(null,o)}else this.exists(t,function(e){e?n(null,t):n(new a(1,"File "+t+" not found."))})},t.prototype.realpathSync=function(t){if(!this.supportsLinks()){if(this.existsSync(t))return t;throw new a(1,"File "+t+" not found.")}for(var e=t.split(s.sep),n=0;n<e.length;n++){var r=e.slice(0,n+1);e[n]=s.join.apply(null,r)}},t.prototype.truncate=function(t,e,n){this.open(t,r.FileFlag.getFileFlag("r+"),420,function(t,r){return t?n(t):(r.truncate(e,function(t){r.close(function(e){n(t||e)})}),void 0)})},t.prototype.truncateSync=function(t,e){var n=this.openSync(t,r.FileFlag.getFileFlag("r+"),420);try{n.truncateSync(e)}catch(i){throw i}finally{n.closeSync()}},t.prototype.readFile=function(t,e,n,r){var i=r;this.open(t,n,420,function(t,n){return t?r(t):(r=function(t,e){n.close(function(n){return null==t&&(t=n),i(t,e)})},n.stat(function(t,i){if(null!=t)return r(t);var o=new u(i.size);n.read(o,0,i.size,0,function(t){if(null!=t)return r(t);if(null===e)return r(t,o);try{r(null,o.toString(e))}catch(n){r(n)}})}),void 0)})},t.prototype.readFileSync=function(t,e,n){var r=this.openSync(t,n,420);try{var i=r.statSync(),o=new u(i.size);return r.readSync(o,0,i.size,0),r.closeSync(),null===e?o:o.toString(e)}finally{r.closeSync()}},t.prototype.writeFile=function(t,e,n,r,i,o){var a=o;this.open(t,r,420,function(t,r){if(null!=t)return o(t);o=function(t){r.close(function(e){a(null!=t?t:e)})};try{"string"==typeof e&&(e=new u(e,n))}catch(i){return o(i)}r.write(e,0,e.length,0,o)})},t.prototype.writeFileSync=function(t,e,n,r,i){var o=this.openSync(t,r,i);try{"string"==typeof e&&(e=new u(e,n)),o.writeSync(e,0,e.length,0)}finally{o.closeSync()}},t.prototype.appendFile=function(t,e,n,r,i,o){var a=o;this.open(t,r,i,function(t,r){return null!=t?o(t):(o=function(t){r.close(function(e){a(null!=t?t:e)})},"string"==typeof e&&(e=new u(e,n)),r.write(e,0,e.length,null,o),void 0)})},t.prototype.appendFileSync=function(t,e,n,r,i){var o=this.openSync(t,r,i);try{"string"==typeof e&&(e=new u(e,n)),o.writeSync(e,0,e.length,null)}finally{o.closeSync()}},t.prototype.chmod=function(t,e,n,r){r(new a(14))},t.prototype.chmodSync=function(){throw new a(14)},t.prototype.chown=function(t,e,n,r,i){i(new a(14))},t.prototype.chownSync=function(){throw new a(14)},t.prototype.utimes=function(t,e,n,r){r(new a(14))},t.prototype.utimesSync=function(){throw new a(14)},t.prototype.link=function(t,e,n){n(new a(14))},t.prototype.linkSync=function(){throw new a(14)},t.prototype.symlink=function(t,e,n,r){r(new a(14))},t.prototype.symlinkSync=function(){throw new a(14)},t.prototype.readlink=function(t,e){e(new a(14))},t.prototype.readlinkSync=function(){throw new a(14)},t}();e.BaseFileSystem=c;var p=function(t){function e(){t.apply(this,arguments)}return f(e,t),e.prototype.supportsSynch=function(){return!0
+},e.prototype.rename=function(t,e,n){try{this.renameSync(t,e),n()}catch(r){n(r)}},e.prototype.stat=function(t,e,n){try{n(null,this.statSync(t,e))}catch(r){n(r)}},e.prototype.open=function(t,e,n,r){try{r(null,this.openSync(t,e,n))}catch(i){r(i)}},e.prototype.unlink=function(t,e){try{this.unlinkSync(t),e()}catch(n){e(n)}},e.prototype.rmdir=function(t,e){try{this.rmdirSync(t),e()}catch(n){e(n)}},e.prototype.mkdir=function(t,e,n){try{this.mkdirSync(t,e),n()}catch(r){n(r)}},e.prototype.readdir=function(t,e){try{e(null,this.readdirSync(t))}catch(n){e(n)}},e.prototype.chmod=function(t,e,n,r){try{this.chmodSync(t,e,n),r()}catch(i){r(i)}},e.prototype.chown=function(t,e,n,r,i){try{this.chownSync(t,e,n,r),i()}catch(o){i(o)}},e.prototype.utimes=function(t,e,n,r){try{this.utimesSync(t,e,n),r()}catch(i){r(i)}},e.prototype.link=function(t,e,n){try{this.linkSync(t,e),n()}catch(r){n(r)}},e.prototype.symlink=function(t,e,n,r){try{this.symlinkSync(t,e,n),r()}catch(i){r(i)}},e.prototype.readlink=function(t,e){try{e(null,this.readlinkSync(t))}catch(n){e(n)}},e}(c);e.SynchronousFileSystem=p}),u("core/node_fs_stats",["require","exports"],function(t,e){!function(t){t[t.FILE=32768]="FILE",t[t.DIRECTORY=16384]="DIRECTORY",t[t.SYMLINK=40960]="SYMLINK"}(e.FileType||(e.FileType={})),e.FileType;var n=function(){function t(t,e,n,r,i,o){if("undefined"==typeof r&&(r=new Date),"undefined"==typeof i&&(i=new Date),"undefined"==typeof o&&(o=new Date),this.size=e,this.mode=n,this.atime=r,this.mtime=i,this.ctime=o,this.dev=0,this.ino=0,this.rdev=0,this.nlink=1,this.blksize=4096,this.uid=0,this.gid=0,null==this.mode)switch(t){case 32768:this.mode=420;break;case 16384:default:this.mode=511}this.blocks=Math.ceil(e/512),this.mode<4096&&(this.mode|=t)}return t.prototype.clone=function(){return new t(61440&this.mode,this.size,4095&this.mode,this.atime,this.mtime,this.ctime)},t.prototype.isFile=function(){return 32768===(61440&this.mode)},t.prototype.isDirectory=function(){return 16384===(61440&this.mode)},t.prototype.isSymbolicLink=function(){return 40960===(61440&this.mode)},t.prototype.chmod=function(t){this.mode=61440&this.mode|t},t.prototype.isSocket=function(){return!1},t.prototype.isBlockDevice=function(){return!1},t.prototype.isCharacterDevice=function(){return!1},t.prototype.isFIFO=function(){return!1},t}();e.Stats=n}),u("generic/inode",["require","exports","../core/node_fs_stats","../core/buffer"],function(t,e,n,r){var i=function(){function t(t,e,n,r,i,o){this.id=t,this.size=e,this.mode=n,this.atime=r,this.mtime=i,this.ctime=o}return t.prototype.toStats=function(){return new n.Stats(16384===(61440&this.mode)?16384:32768,this.size,this.mode,new Date(this.atime),new Date(this.mtime),new Date(this.ctime))},t.prototype.getSize=function(){return 30+this.id.length},t.prototype.toBuffer=function(t){return"undefined"==typeof t&&(t=new r.Buffer(this.getSize())),t.writeUInt32LE(this.size,0),t.writeUInt16LE(this.mode,4),t.writeDoubleLE(this.atime,6),t.writeDoubleLE(this.mtime,14),t.writeDoubleLE(this.ctime,22),t.write(this.id,30,this.id.length,"ascii"),t},t.prototype.update=function(t){var e=!1;this.size!==t.size&&(this.size=t.size,e=!0),this.mode!==t.mode&&(this.mode=t.mode,e=!0);var n=t.atime.getTime();this.atime!==n&&(this.atime=n,e=!0);var r=t.mtime.getTime();this.mtime!==r&&(this.mtime=r,e=!0);var i=t.ctime.getTime();return this.ctime!==i&&(this.ctime=i,e=!0),e},t.fromBuffer=function(e){if(void 0===e)throw new Error("NO");return new t(e.toString("ascii",30),e.readUInt32LE(0),e.readUInt16LE(4),e.readDoubleLE(6),e.readDoubleLE(14),e.readDoubleLE(22))},t.prototype.isFile=function(){return 32768===(61440&this.mode)},t.prototype.isDirectory=function(){return 16384===(61440&this.mode)},t}();return i}),u("core/file",["require","exports","./api_error"],function(t,e,n){var r=n.ApiError;n.ErrorCode;var i=function(){function t(){}return t.prototype.sync=function(t){t(new r(14))},t.prototype.syncSync=function(){throw new r(14)},t.prototype.datasync=function(t){this.sync(t)},t.prototype.datasyncSync=function(){return this.syncSync()},t.prototype.chown=function(t,e,n){n(new r(14))},t.prototype.chownSync=function(){throw new r(14)},t.prototype.chmod=function(t,e){e(new r(14))},t.prototype.chmodSync=function(){throw new r(14)},t.prototype.utimes=function(t,e,n){n(new r(14))},t.prototype.utimesSync=function(){throw new r(14)},t}();e.BaseFile=i});var f=this.__extends||function(t,e){function n(){this.constructor=t}for(var r in e)e.hasOwnProperty(r)&&(t[r]=e[r]);n.prototype=e.prototype,t.prototype=new n};u("generic/preload_file",["require","exports","../core/file","../core/buffer","../core/api_error","../core/node_fs"],function(t,e,n,r,i,o){var a=i.ApiError;i.ErrorCode;var s=o.fs,u=r.Buffer,c=function(t){function e(e,n,r,i,o){if(t.call(this),this._pos=0,this._fs=e,this._path=n,this._flag=r,this._stat=i,this._buffer=null!=o?o:new u(0),this._stat.size!==this._buffer.length)throw new Error("Invalid buffer: Buffer is "+this._buffer.length+" long, yet Stats object specifies that file is "+this._stat.size+" long.")}return f(e,t),e.prototype.getPath=function(){return this._path},e.prototype.getPos=function(){return this._flag.isAppendable()?this._stat.size:this._pos},e.prototype.advancePos=function(t){return this._pos+=t},e.prototype.setPos=function(t){return this._pos=t},e.prototype.sync=function(t){try{this.syncSync(),t()}catch(e){t(e)}},e.prototype.syncSync=function(){throw new a(14)},e.prototype.close=function(t){try{this.closeSync(),t()}catch(e){t(e)}},e.prototype.closeSync=function(){throw new a(14)},e.prototype.stat=function(t){try{t(null,this._stat.clone())}catch(e){t(e)}},e.prototype.statSync=function(){return this._stat.clone()},e.prototype.truncate=function(t,e){try{this.truncateSync(t),this._flag.isSynchronous()&&!s.getRootFS().supportsSynch()&&this.sync(e),e()}catch(n){return e(n)}},e.prototype.truncateSync=function(t){if(!this._flag.isWriteable())throw new a(0,"File not opened with a writeable mode.");if(this._stat.mtime=new Date,t>this._buffer.length){var e=new u(t-this._buffer.length);return e.fill(0),this.writeSync(e,0,e.length,this._buffer.length),this._flag.isSynchronous()&&s.getRootFS().supportsSynch()&&this.syncSync(),void 0}this._stat.size=t;var n=new u(t);this._buffer.copy(n,0,0,t),this._buffer=n,this._flag.isSynchronous()&&s.getRootFS().supportsSynch()&&this.syncSync()},e.prototype.write=function(t,e,n,r,i){try{i(null,this.writeSync(t,e,n,r),t)}catch(o){i(o)}},e.prototype.writeSync=function(t,e,n,r){if(null==r&&(r=this.getPos()),!this._flag.isWriteable())throw new a(0,"File not opened with a writeable mode.");var i=r+n;if(i>this._stat.size&&(this._stat.size=i,i>this._buffer.length)){var o=new u(i);this._buffer.copy(o),this._buffer=o}var s=t.copy(this._buffer,r,e,e+n);return this._stat.mtime=new Date,this._flag.isSynchronous()?(this.syncSync(),s):(this.setPos(r+s),s)},e.prototype.read=function(t,e,n,r,i){try{i(null,this.readSync(t,e,n,r),t)}catch(o){i(o)}},e.prototype.readSync=function(t,e,n,r){if(!this._flag.isReadable())throw new a(0,"File not opened with a readable mode.");null==r&&(r=this.getPos());var i=r+n;i>this._stat.size&&(n=this._stat.size-r);var o=this._buffer.copy(t,e,r,r+n);return this._stat.atime=new Date,this._pos=r+n,o},e.prototype.chmod=function(t,e){try{this.chmodSync(t),e()}catch(n){e(n)}},e.prototype.chmodSync=function(t){if(!this._fs.supportsProps())throw new a(14);this._stat.chmod(t),this.syncSync()},e}(n.BaseFile);e.PreloadFile=c;var p=function(t){function e(e,n,r,i,o){t.call(this,e,n,r,i,o)}return f(e,t),e.prototype.sync=function(t){t()},e.prototype.syncSync=function(){},e.prototype.close=function(t){t()},e.prototype.closeSync=function(){},e}(c);e.NoSyncFile=p});var f=this.__extends||function(t,e){function n(){this.constructor=t}for(var r in e)e.hasOwnProperty(r)&&(t[r]=e[r]);n.prototype=e.prototype,t.prototype=new n};u("generic/key_value_filesystem",["require","exports","../core/file_system","../core/api_error","../core/node_fs_stats","../core/node_path","../generic/inode","../core/buffer","../generic/preload_file"],function(t,e,n,r,i,o,a,s,u){function c(){return"xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx".replace(/[xy]/g,function(t){var e=0|16*Math.random(),n="x"==t?e:8|3&e;return n.toString(16)})}function p(t,e){return t?(e(t),!1):!0}function h(t,e,n){return t?(e.abort(function(){n(t)}),!1):!0}var l="/",d=o.path,y=r.ApiError,g=s.Buffer,w=function(){function t(t){this.store=t,this.originalData={},this.modifiedKeys=[]}return t.prototype.stashOldValue=function(t,e){this.originalData.hasOwnProperty(t)||(this.originalData[t]=e)},t.prototype.markModified=function(t){-1===this.modifiedKeys.indexOf(t)&&(this.modifiedKeys.push(t),this.originalData.hasOwnProperty(t)||(this.originalData[t]=this.store.get(t)))},t.prototype.get=function(t){var e=this.store.get(t);return this.stashOldValue(t,e),e},t.prototype.put=function(t,e,n){return this.markModified(t),this.store.put(t,e,n)},t.prototype.delete=function(t){this.markModified(t),this.store.delete(t)},t.prototype.commit=function(){},t.prototype.abort=function(){var t,e,n;for(t=0;t<this.modifiedKeys.length;t++)e=this.modifiedKeys[t],n=this.originalData[e],null===n?this.store.delete(e):this.store.put(e,n,!0)},t}();e.SimpleSyncRWTransaction=w;var m=function(t){function e(e,n,r,i,o){t.call(this,e,n,r,i,o)}return f(e,t),e.prototype.syncSync=function(){this._fs._syncSync(this._path,this._buffer,this._stat)},e.prototype.closeSync=function(){this.syncSync()},e}(u.PreloadFile);e.SyncKeyValueFile=m;var v=function(t){function e(e){t.call(this),this.store=e.store,this.makeRootDirectory()}return f(e,t),e.isAvailable=function(){return!0},e.prototype.getName=function(){return this.store.name()},e.prototype.isReadOnly=function(){return!1},e.prototype.supportsSymlinks=function(){return!1},e.prototype.supportsProps=function(){return!1},e.prototype.supportsSynch=function(){return!0},e.prototype.makeRootDirectory=function(){var t=this.store.beginTransaction("readwrite");if(void 0===t.get(l)){var e=(new Date).getTime(),n=new a(c(),4096,16895,e,e,e);t.put(n.id,new g("{}"),!1),t.put(l,n.toBuffer(),!1),t.commit()}},e.prototype._findINode=function(t,e,n){var r=this,i=function(i){var o=r.getDirListing(t,e,i);if(o[n])return o[n];throw y.ENOENT(d.resolve(e,n))};return"/"===e?""===n?l:i(this.getINode(t,e,l)):i(this.getINode(t,e+d.sep+n,this._findINode(t,d.dirname(e),d.basename(e))))},e.prototype.findINode=function(t,e){return this.getINode(t,e,this._findINode(t,d.dirname(e),d.basename(e)))},e.prototype.getINode=function(t,e,n){var r=t.get(n);if(void 0===r)throw y.ENOENT(e);return a.fromBuffer(r)},e.prototype.getDirListing=function(t,e,n){if(!n.isDirectory())throw y.ENOTDIR(e);var r=t.get(n.id);if(void 0===r)throw y.ENOENT(e);return JSON.parse(r.toString())},e.prototype.addNewNode=function(t,e){for(var n,r=0;5>r;)try{return n=c(),t.put(n,e,!1),n}catch(i){}throw new y(2,"Unable to commit data to key-value store.")},e.prototype.commitNewFile=function(t,e,n,r,i){var o=d.dirname(e),s=d.basename(e),u=this.findINode(t,o),f=this.getDirListing(t,o,u),c=(new Date).getTime();if("/"===e)throw y.EEXIST(e);if(f[s])throw y.EEXIST(e);try{var p=this.addNewNode(t,i),h=new a(p,i.length,r|n,c,c,c),l=this.addNewNode(t,h.toBuffer());f[s]=l,t.put(u.id,new g(JSON.stringify(f)),!0)}catch(w){throw t.abort(),w}return t.commit(),h},e.prototype.empty=function(){this.store.clear(),this.makeRootDirectory()},e.prototype.renameSync=function(t,e){var n=this.store.beginTransaction("readwrite"),r=d.dirname(t),i=d.basename(t),o=d.dirname(e),a=d.basename(e),s=this.findINode(n,r),u=this.getDirListing(n,r,s);if(!u[i])throw y.ENOENT(t);var f=u[i];if(delete u[i],0===(o+"/").indexOf(t+"/"))throw new y(5,r);var c,p;if(o===r?(c=s,p=u):(c=this.findINode(n,o),p=this.getDirListing(n,o,c)),p[a]){var h=this.getINode(n,e,p[a]);if(!h.isFile())throw y.EPERM(e);try{n.delete(h.id),n.delete(p[a])}catch(l){throw n.abort(),l}}p[a]=f;try{n.put(s.id,new g(JSON.stringify(u)),!0),n.put(c.id,new g(JSON.stringify(p)),!0)}catch(l){throw n.abort(),l}n.commit()},e.prototype.statSync=function(t){return this.findINode(this.store.beginTransaction("readonly"),t).toStats()},e.prototype.createFileSync=function(t,e,n){var r=this.store.beginTransaction("readwrite"),i=new g(0),o=this.commitNewFile(r,t,32768,n,i);return new m(this,t,e,o.toStats(),i)},e.prototype.openFileSync=function(t,e){var n=this.store.beginTransaction("readonly"),r=this.findINode(n,t),i=n.get(r.id);if(void 0===i)throw y.ENOENT(t);return new m(this,t,e,r.toStats(),i)},e.prototype.removeEntry=function(t,e){var n=this.store.beginTransaction("readwrite"),r=d.dirname(t),i=this.findINode(n,r),o=this.getDirListing(n,r,i),a=d.basename(t);if(!o[a])throw y.ENOENT(t);var s=o[a];delete o[a];var u=this.getINode(n,t,s);if(!e&&u.isDirectory())throw y.EISDIR(t);if(e&&!u.isDirectory())throw y.ENOTDIR(t);try{n.delete(u.id),n.delete(s),n.put(i.id,new g(JSON.stringify(o)),!0)}catch(f){throw n.abort(),f}n.commit()},e.prototype.unlinkSync=function(t){this.removeEntry(t,!1)},e.prototype.rmdirSync=function(t){this.removeEntry(t,!0)},e.prototype.mkdirSync=function(t,e){var n=this.store.beginTransaction("readwrite"),r=new g("{}");this.commitNewFile(n,t,16384,e,r)},e.prototype.readdirSync=function(t){var e=this.store.beginTransaction("readonly");return Object.keys(this.getDirListing(e,t,this.findINode(e,t)))},e.prototype._syncSync=function(t,e,n){var r=this.store.beginTransaction("readwrite"),i=this._findINode(r,d.dirname(t),d.basename(t)),o=this.getINode(r,t,i),a=o.update(n);try{r.put(o.id,e,!0),a&&r.put(i,o.toBuffer(),!0)}catch(s){throw r.abort(),s}r.commit()},e}(n.SynchronousFileSystem);e.SyncKeyValueFileSystem=v;var b=function(t){function e(e,n,r,i,o){t.call(this,e,n,r,i,o)}return f(e,t),e.prototype.sync=function(t){this._fs._sync(this._path,this._buffer,this._stat,t)},e.prototype.close=function(t){this.sync(t)},e}(u.PreloadFile);e.AsyncKeyValueFile=b;var E=function(t){function e(){t.apply(this,arguments)}return f(e,t),e.prototype.init=function(t,e){this.store=t,this.makeRootDirectory(e)},e.isAvailable=function(){return!0},e.prototype.getName=function(){return this.store.name()},e.prototype.isReadOnly=function(){return!1},e.prototype.supportsSymlinks=function(){return!1},e.prototype.supportsProps=function(){return!1},e.prototype.supportsSynch=function(){return!1},e.prototype.makeRootDirectory=function(t){var e=this.store.beginTransaction("readwrite");e.get(l,function(n,r){if(n||void 0===r){var i=(new Date).getTime(),o=new a(c(),4096,16895,i,i,i);e.put(o.id,new g("{}"),!1,function(n){h(n,e,t)&&e.put(l,o.toBuffer(),!1,function(n){n?e.abort(function(){t(n)}):e.commit(t)})})}else e.commit(t)})},e.prototype._findINode=function(t,e,n,r){var i=this,o=function(t,i,o){t?r(t):o[n]?r(null,o[n]):r(y.ENOENT(d.resolve(e,n)))};"/"===e?""===n?r(null,l):this.getINode(t,e,l,function(n,a){p(n,r)&&i.getDirListing(t,e,a,function(t,e){o(t,a,e)})}):this.findINodeAndDirListing(t,e,o)},e.prototype.findINode=function(t,e,n){var r=this;this._findINode(t,d.dirname(e),d.basename(e),function(i,o){p(i,n)&&r.getINode(t,e,o,n)})},e.prototype.getINode=function(t,e,n,r){t.get(n,function(t,n){p(t,r)&&(void 0===n?r(y.ENOENT(e)):r(null,a.fromBuffer(n)))})},e.prototype.getDirListing=function(t,e,n,r){n.isDirectory()?t.get(n.id,function(t,n){if(p(t,r))try{r(null,JSON.parse(n.toString()))}catch(t){r(y.ENOENT(e))}}):r(y.ENOTDIR(e))},e.prototype.findINodeAndDirListing=function(t,e,n){var r=this;this.findINode(t,e,function(i,o){p(i,n)&&r.getDirListing(t,e,o,function(t,e){p(t,n)&&n(null,o,e)})})},e.prototype.addNewNode=function(t,e,n){var r,i=0,o=function(){5===++i?n(new y(2,"Unable to commit data to key-value 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l=c[o],d=f[o],w=c[s],m=f[s];if(l[a]){var v=l[a];delete l[a];var b=function(){w[u]=v,i.put(d.id,new g(JSON.stringify(l)),!0,function(t){h(t,i,n)&&(o===s?i.commit(n):i.put(m.id,new g(JSON.stringify(w)),!0,function(t){h(t,i,n)&&i.commit(n)}))})};w[u]?r.getINode(i,e,w[u],function(t,r){h(t,i,n)&&(r.isFile()?i.delete(r.id,function(t){h(t,i,n)&&i.delete(w[u],function(t){h(t,i,n)&&b()})}):i.abort(function(){n(y.EPERM(e))}))}):b()}else n(y.ENOENT(t))}},w=function(t){r.findINodeAndDirListing(i,t,function(e,r,o){e?p||(p=!0,i.abort(function(){n(e)})):(f[t]=r,c[t]=o,l())})};w(o),o!==s&&w(s)},e.prototype.stat=function(t,e,n){var r=this.store.beginTransaction("readonly");this.findINode(r,t,function(t,e){p(t,n)&&n(null,e.toStats())})},e.prototype.createFile=function(t,e,n,r){var i=this,o=this.store.beginTransaction("readwrite"),a=new g(0);this.commitNewFile(o,t,32768,n,a,function(n,o){p(n,r)&&r(null,new b(i,t,e,o.toStats(),a))})},e.prototype.openFile=function(t,e,n){var r=this,i=this.store.beginTransaction("readonly");this.findINode(i,t,function(o,a){p(o,n)&&i.get(a.id,function(i,o){p(i,n)&&(void 0===o?n(y.ENOENT(t)):n(null,new b(r,t,e,a.toStats(),o)))})})},e.prototype.removeEntry=function(t,e,n){var r=this,i=this.store.beginTransaction("readwrite"),o=d.dirname(t),a=d.basename(t);this.findINodeAndDirListing(i,o,function(o,s,u){if(h(o,i,n))if(u[a]){var f=u[a];delete u[a],r.getINode(i,t,f,function(r,o){h(r,i,n)&&(!e&&o.isDirectory()?i.abort(function(){n(y.EISDIR(t))}):e&&!o.isDirectory()?i.abort(function(){n(y.ENOTDIR(t))}):i.delete(o.id,function(t){h(t,i,n)&&i.delete(f,function(t){h(t,i,n)&&i.put(s.id,new g(JSON.stringify(u)),!0,function(t){h(t,i,n)&&i.commit(n)})})}))})}else i.abort(function(){n(y.ENOENT(t))})})},e.prototype.unlink=function(t,e){this.removeEntry(t,!1,e)},e.prototype.rmdir=function(t,e){this.removeEntry(t,!0,e)},e.prototype.mkdir=function(t,e,n){var r=this.store.beginTransaction("readwrite"),i=new g("{}");this.commitNewFile(r,t,16384,e,i,n)},e.prototype.readdir=function(t,e){var n=this,r=this.store.beginTransaction("readonly");this.findINode(r,t,function(i,o){p(i,e)&&n.getDirListing(r,t,o,function(t,n){p(t,e)&&e(null,Object.keys(n))})})},e.prototype._sync=function(t,e,n,r){var i=this,o=this.store.beginTransaction("readwrite");this._findINode(o,d.dirname(t),d.basename(t),function(a,s){h(a,o,r)&&i.getINode(o,t,s,function(t,i){if(h(t,o,r)){var a=i.update(n);o.put(i.id,e,!0,function(t){h(t,o,r)&&(a?o.put(s,i.toBuffer(),!0,function(t){h(t,o,r)&&o.commit(r)}):o.commit(r))})}})})},e}(n.BaseFileSystem);e.AsyncKeyValueFileSystem=E}),u("core/global",["require","exports"],function(){var t;return t="undefined"!=typeof window?window:"undefined"!=typeof self?self:global});var f=this.__extends||function(t,e){function n(){this.constructor=t}for(var r in e)e.hasOwnProperty(r)&&(t[r]=e[r]);n.prototype=e.prototype,t.prototype=new 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t.prototype.name=function(){return"IndexedDB - "+this.storeName},t.prototype.clear=function(t){try{var e=this.db.transaction(this.storeName,"readwrite"),n=e.objectStore(this.storeName),r=n.clear();r.onsuccess=function(){setTimeout(t,0)},r.onerror=c(t)}catch(i){t(u(i))}},t.prototype.beginTransaction=function(t){"undefined"==typeof t&&(t="readonly");var e=this.db.transaction(this.storeName,t),n=e.objectStore(this.storeName);if("readwrite"===t)return new g(e,n);if("readonly"===t)return new y(e,n);throw new l(9,"Invalid transaction type.")},t}();e.IndexedDBStore=w;var m=function(t){function e(e,n){var r=this;t.call(this),new w(function(t,n){t?e(t):r.init(n,function(t){e(t,r)})},n)}return f(e,t),e.isAvailable=function(){return"undefined"!=typeof d},e}(i.AsyncKeyValueFileSystem);e.IndexedDBFileSystem=m,r.registerFileSystem("IndexedDB",m)}),u("generic/file_index",["require","exports","../core/node_fs_stats","../core/node_path"],function(t,e,n,r){var i=n.Stats,o=r.path,a=function(){function t(){this._index={},this.addPath("/",new u)}return t.prototype._split_path=function(t){var e=o.dirname(t),n=t.substr(e.length+("/"===e?0:1));return[e,n]},t.prototype.fileIterator=function(t){for(var e in this._index)for(var n=this._index[e],r=n.getListing(),i=0;i<r.length;i++){var o=n.getItem(r[i]);o.isFile()&&t(o.getData())}},t.prototype.addPath=function(t,e){if(null==e)throw new Error("Inode must be specified");if("/"!==t[0])throw new Error("Path must be absolute, got: "+t);if(this._index.hasOwnProperty(t))return this._index[t]===e;var n=this._split_path(t),r=n[0],i=n[1],o=this._index[r];return void 0!==o||"/"===t||(o=new u,this.addPath(r,o))?"/"===t||o.addItem(i,e)?(e.isFile()||(this._index[t]=e),!0):!1:!1},t.prototype.removePath=function(t){var e=this._split_path(t),n=e[0],r=e[1],i=this._index[n];if(void 0===i)return null;var o=i.remItem(r);if(null===o)return null;if(!o.isFile()){for(var a=o,s=a.getListing(),u=0;u<s.length;u++)this.removePath(t+"/"+s[u]);"/"!==t&&delete this._index[t]}return o},t.prototype.ls=function(t){var e=this._index[t];return void 0===e?null:e.getListing()},t.prototype.getInode=function(t){var e=this._split_path(t),n=e[0],r=e[1],i=this._index[n];return void 0===i?null:n===t?i:i.getItem(r)},t.from_listing=function(e){var n=new t,r=new u;n._index["/"]=r;for(var o=[["",e,r]];o.length>0;){var a,f=o.pop(),c=f[0],p=f[1],h=f[2];for(var l in p){var d=p[l],y=""+c+"/"+l;null!=d?(n._index[y]=a=new u,o.push([y,d,a])):a=new s(new i(32768,-1,365)),null!=h&&(h._ls[l]=a)}}return n},t}();e.FileIndex=a;var s=function(){function t(t){this.data=t}return t.prototype.isFile=function(){return!0},t.prototype.isDir=function(){return!1},t.prototype.getData=function(){return this.data},t.prototype.setData=function(t){this.data=t},t}();e.FileInode=s;var u=function(){function t(){this._ls={}}return t.prototype.isFile=function(){return!1},t.prototype.isDir=function(){return!0},t.prototype.getStats=function(){return new i(16384,4096,365)},t.prototype.getListing=function(){return Object.keys(this._ls)},t.prototype.getItem=function(t){var e;return null!=(e=this._ls[t])?e:null},t.prototype.addItem=function(t,e){return t in this._ls?!1:(this._ls[t]=e,!0)},t.prototype.remItem=function(t){var e=this._ls[t];return void 0===e?null:(delete this._ls[t],e)},t}();e.DirInode=u}),u("core/util",["require","exports"],function(t,e){function n(t){var e,n,r,i,o,a;for(r=[],o=[t],e=0;0!==o.length;)if(a=o.pop(),"boolean"==typeof a)e+=4;else if("string"==typeof a)e+=2*a.length;else if("number"==typeof a)e+=8;else if("object"==typeof a&&r.indexOf(a)<0){r.push(a),e+=4;for(n in a)i=a[n],e+=2*n.length,o.push(i)}return e}e.roughSizeOfObject=n,e.isIE=null!=/(msie) ([\w.]+)/.exec(navigator.userAgent.toLowerCase())||-1!==navigator.userAgent.indexOf("Trident")}),u("generic/xhr",["require","exports","../core/util","../core/buffer","../core/api_error"],function(t,e,n,r,i){function o(t){for(var e=IEBinaryToArray_ByteStr(t),n=IEBinaryToArray_ByteStr_Last(t),r=e.replace(/[\s\S]/g,function(t){var e=t.charCodeAt(0);return String.fromCharCode(255&e,e>>8)})+n,i=new Array(r.length),o=0;o<r.length;o++)i[o]=r.charCodeAt(o);return i}function a(t,e,n,r){switch(n){case"buffer":case"json":break;default:return r(new y(9,"Invalid download type: "+n))}var i=new XMLHttpRequest;i.open("GET",e,t),i.setRequestHeader("Accept-Charset","x-user-defined"),i.onreadystatechange=function(){var t;if(4===i.readyState){if(200!==i.status)return r(new y(i.status,"XHR error."));switch(n){case"buffer":return t=o(i.responseBody),r(null,new g(t));case"json":return r(null,JSON.parse(i.responseText))}}},i.send()}function s(t,e,n){a(!0,t,e,n)}function u(t,e){var n;return a(!1,t,e,function(t,e){if(t)throw t;n=e}),n}function f(t,e,n){var r=new XMLHttpRequest;r.open("GET",t,!0);var i=!0;switch(e){case"buffer":r.responseType="arraybuffer";break;case"json":try{r.responseType="json",i="json"===r.responseType}catch(o){i=!1}break;default:return n(new y(9,"Invalid download type: "+e))}r.onreadystatechange=function(){if(4===r.readyState){if(200!==r.status)return n(new y(r.status,"XHR error."));switch(e){case"buffer":return n(null,new g(r.response?r.response:0));case"json":return i?n(null,r.response):n(null,JSON.parse(r.responseText))}}},r.send()}function c(t,e){var n=new XMLHttpRequest;n.open("GET",t,!1);var r=null,i=null;if(n.overrideMimeType("text/plain; charset=x-user-defined"),n.onreadystatechange=function(){if(4===n.readyState){if(200!==n.status)return i=new y(n.status,"XHR error."),void 0;switch(e){case"buffer":var t=n.responseText;r=new g(t.length);for(var o=0;o<t.length;o++)r.writeUInt8(t.charCodeAt(o),o);return;case"json":return r=JSON.parse(n.responseText),void 0}}},n.send(),i)throw i;return r}function p(t,e){var n=new XMLHttpRequest;switch(n.open("GET",t,!1),e){case"buffer":n.responseType="arraybuffer";break;case"json":break;default:throw new y(9,"Invalid download type: "+e)}var r,i;if(n.onreadystatechange=function(){if(4===n.readyState)if(200===n.status)switch(e){case"buffer":r=new g(n.response);break;case"json":r=JSON.parse(n.response)}else i=new y(n.status,"XHR error.")},n.send(),i)throw i;return r}function h(t,e,n){var r=new XMLHttpRequest;r.open("HEAD",e,t),r.onreadystatechange=function(){if(4===r.readyState){if(200!=r.status)return n(new y(r.status,"XHR HEAD error."));try{return n(null,parseInt(r.getResponseHeader("Content-Length"),10))}catch(t){return n(new y(2,"XHR HEAD error: Could not read content-length."))}}},r.send()}function l(t){var e;return h(!1,t,function(t,n){if(t)throw t;e=n}),e}function d(t,e){h(!0,t,e)}var y=i.ApiError;i.ErrorCode;var g=r.Buffer;e.asyncDownloadFile=n.isIE&&"undefined"==typeof Blob?s:f,e.syncDownloadFile=n.isIE&&"undefined"==typeof Blob?u:n.isIE&&"undefined"!=typeof Blob?p:c,e.getFileSizeSync=l,e.getFileSizeAsync=d});var f=this.__extends||function(t,e){function n(){this.constructor=t}for(var r in e)e.hasOwnProperty(r)&&(t[r]=e[r]);n.prototype=e.prototype,t.prototype=new n};u("backend/XmlHttpRequest",["require","exports","../core/file_system","../generic/file_index","../core/buffer","../core/api_error","../core/file_flag","../generic/preload_file","../core/browserfs","../generic/xhr"],function(t,e,n,r,i,o,a,s,u,c){i.Buffer;var p=o.ApiError;o.ErrorCode,a.FileFlag,a.ActionType;var h=function(t){function e(e,n){"undefined"==typeof n&&(n=""),t.call(this),this.prefix_url=n,null==e&&(e="index.json"),n.length>0&&"/"!==n.charAt(n.length-1)&&(n+="/");var i=this._requestFileSync(e,"json");if(null==i)throw new Error("Unable to find listing at URL: "+e);this._index=r.FileIndex.from_listing(i)}return f(e,t),e.prototype.empty=function(){this._index.fileIterator(function(t){t.file_data=null})},e.prototype.getXhrPath=function(t){return"/"===t.charAt(0)&&(t=t.slice(1)),this.prefix_url+t},e.prototype._requestFileSizeAsync=function(t,e){c.getFileSizeAsync(this.getXhrPath(t),e)},e.prototype._requestFileSizeSync=function(t){return c.getFileSizeSync(this.getXhrPath(t))},e.prototype._requestFileAsync=function(t,e,n){c.asyncDownloadFile(this.getXhrPath(t),e,n)},e.prototype._requestFileSync=function(t,e){return c.syncDownloadFile(this.getXhrPath(t),e)},e.prototype.getName=function(){return"XmlHttpRequest"},e.isAvailable=function(){return"undefined"!=typeof XMLHttpRequest&&null!==XMLHttpRequest},e.prototype.diskSpace=function(t,e){e(0,0)},e.prototype.isReadOnly=function(){return!0},e.prototype.supportsLinks=function(){return!1},e.prototype.supportsProps=function(){return!1},e.prototype.supportsSynch=function(){return!0},e.prototype.preloadFile=function(t,e){var n=this._index.getInode(t);if(null===n)throw p.ENOENT(t);var r=n.getData();r.size=e.length,r.file_data=e},e.prototype.stat=function(t,e,n){var r=this._index.getInode(t);if(null===r)return n(p.ENOENT(t));var i;r.isFile()?(i=r.getData(),i.size<0?this._requestFileSizeAsync(t,function(t,e){return t?n(t):(i.size=e,n(null,i.clone()),void 0)}):n(null,i.clone())):(i=r.getStats(),n(null,i))},e.prototype.statSync=function(t){var e=this._index.getInode(t);if(null===e)throw p.ENOENT(t);var n;return e.isFile()?(n=e.getData(),n.size<0&&(n.size=this._requestFileSizeSync(t))):n=e.getStats(),n},e.prototype.open=function(t,e,n,r){if(e.isWriteable())return r(new p(0,t));var i=this,o=this._index.getInode(t);if(null===o)return r(p.ENOENT(t));if(o.isDir())return r(p.EISDIR(t));var a=o.getData();switch(e.pathExistsAction()){case 1:case 2:return r(p.EEXIST(t));case 0:if(null!=a.file_data)return r(null,new s.NoSyncFile(i,t,e,a.clone(),a.file_data));this._requestFileAsync(t,"buffer",function(n,o){return 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i=r.createReader(),o=[],a=function(r){e(n.convert(r,t))},s=function(){i.readEntries(function(t){t.length?(o=o.concat(d(t)),s()):e(null,o)},a)};s()})},e.prototype.readdir=function(t,e){this._readdir(t,function(t,n){if(null!=t)return e(t);for(var r=[],i=0;i<n.length;i++)r.push(n[i].name);e(null,r)})},e}(r.BaseFileSystem);e.HTML5FS=E,u.registerFileSystem("HTML5FS",E)});var f=this.__extends||function(t,e){function n(){this.constructor=t}for(var r in e)e.hasOwnProperty(r)&&(t[r]=e[r]);n.prototype=e.prototype,t.prototype=new n};u("backend/in_memory",["require","exports","../generic/key_value_filesystem","../core/browserfs"],function(t,e,n,r){var i=function(){function t(){this.store={}}return t.prototype.name=function(){return"In-memory"},t.prototype.clear=function(){this.store={}},t.prototype.beginTransaction=function(){return new n.SimpleSyncRWTransaction(this)},t.prototype.get=function(t){return this.store[t]},t.prototype.put=function(t,e,n){return!n&&this.store.hasOwnProperty(t)?!1:(this.store[t]=e,!0)},t.prototype.delete=function(t){delete this.store[t]},t}();e.InMemoryStore=i;var o=function(t){function e(){t.call(this,{store:new i})}return f(e,t),e}(n.SyncKeyValueFileSystem);e.InMemoryFileSystem=o,r.registerFileSystem("InMemory",o)});var f=this.__extends||function(t,e){function n(){this.constructor=t}for(var r in e)e.hasOwnProperty(r)&&(t[r]=e[r]);n.prototype=e.prototype,t.prototype=new n};u("backend/localStorage",["require","exports","../core/buffer","../core/browserfs","../generic/key_value_filesystem","../core/api_error","../core/global"],function(t,e,n,r,i,o,a){var s=n.Buffer,u=o.ApiError;o.ErrorCode;var c,p=!1;try{a.localStorage.setItem("__test__",String.fromCharCode(55296)),p=a.localStorage.getItem("__test__")===String.fromCharCode(55296)}catch(h){p=!1}c=p?"binary_string":"binary_string_ie";var l=function(){function t(){}return t.prototype.name=function(){return"LocalStorage"},t.prototype.clear=function(){a.localStorage.clear()},t.prototype.beginTransaction=function(){return new i.SimpleSyncRWTransaction(this)},t.prototype.get=function(t){try{var e=a.localStorage.getItem(t);if(null!==e)return new s(e,c)}catch(n){}return void 0},t.prototype.put=function(t,e,n){try{return n||null===a.localStorage.getItem(t)?(a.localStorage.setItem(t,e.toString(c)),!0):!1}catch(r){throw new u(11,"LocalStorage is full.")}},t.prototype.delete=function(t){try{a.localStorage.removeItem(t)}catch(e){throw new u(2,"Unable to delete key "+t+": "+e)}},t}();e.LocalStorageStore=l;var d=function(t){function e(){t.call(this,{store:new l})}return f(e,t),e.isAvailable=function(){return"undefined"!=typeof a.localStorage},e}(i.SyncKeyValueFileSystem);e.LocalStorageFileSystem=d,r.registerFileSystem("LocalStorage",d)});var f=this.__extends||function(t,e){function n(){this.constructor=t}for(var r in e)e.hasOwnProperty(r)&&(t[r]=e[r]);n.prototype=e.prototype,t.prototype=new n};u("backend/mountable_file_system",["require","exports","../core/file_system","./in_memory","../core/api_error","../core/node_fs","../core/browserfs"],function(t,e,n,r,i,o,a){function s(t,e){return e?function(){for(var e=[],n=0;n<arguments.length-0;n++)e[n]=arguments[n+0];var r=e[0],i=this._get_fs(r);e[0]=i.path;try{return i.fs[t].apply(i.fs,e)}catch(o){throw this.standardizeError(o,i.path,r),o}}:function(){for(var e=[],n=0;n<arguments.length-0;n++)e[n]=arguments[n+0];var r=e[0],o=this._get_fs(r);if(e[0]=o.path,"function"==typeof e[e.length-1]){var a=e[e.length-1],s=this;e[e.length-1]=function(){for(var t=[],e=0;e<arguments.length-0;e++)t[e]=arguments[e+0];t.length>0&&t[0]instanceof i.ApiError&&s.standardizeError(t[0],o.path,r),a.apply(null,t)}}return o.fs[t].apply(o.fs,e)}}var u=i.ApiError;i.ErrorCode;var c=o.fs,p=function(t){function e(){t.call(this),this.mntMap={},this.rootFs=new r.InMemoryFileSystem}return f(e,t),e.prototype.mount=function(t,e){if(this.mntMap[t])throw new u(9,"Mount point "+t+" is already taken.");this.rootFs.mkdirSync(t,511),this.mntMap[t]=e},e.prototype.umount=function(t){if(!this.mntMap[t])throw new u(9,"Mount point "+t+" is already unmounted.");delete this.mntMap[t],this.rootFs.rmdirSync(t)},e.prototype._get_fs=function(t){for(var e in this.mntMap){var n=this.mntMap[e];if(0===t.indexOf(e))return t=t.substr(e.length>1?e.length:0),""===t&&(t="/"),{fs:n,path:t}}return{fs:this.rootFs,path:t}},e.prototype.getName=function(){return"MountableFileSystem"},e.isAvailable=function(){return!0},e.prototype.diskSpace=function(t,e){e(0,0)},e.prototype.isReadOnly=function(){return!1},e.prototype.supportsLinks=function(){return!1},e.prototype.supportsProps=function(){return!1},e.prototype.supportsSynch=function(){return!0},e.prototype.standardizeError=function(t,e,n){var r;return-1!==(r=t.message.indexOf(e))&&(t.message=t.message.substr(0,r)+n+t.message.substr(r+e.length)),t},e.prototype.rename=function(t,e,n){var r=this._get_fs(t),i=this._get_fs(e);if(r.fs===i.fs){var o=this;return r.fs.rename(r.path,i.path,function(a){a&&o.standardizeError(o.standardizeError(a,r.path,t),i.path,e),n(a)})}return c.readFile(t,function(r,i){return r?n(r):(c.writeFile(e,i,function(e){return e?n(e):(c.unlink(t,n),void 0)}),void 0)})},e.prototype.renameSync=function(t,e){var n=this._get_fs(t),r=this._get_fs(e);if(n.fs===r.fs)try{return n.fs.renameSync(n.path,r.path)}catch(i){throw this.standardizeError(this.standardizeError(i,n.path,t),r.path,e),i}var o=c.readFileSync(t);return c.writeFileSync(e,o),c.unlinkSync(t)},e}(n.BaseFileSystem);e.MountableFileSystem=p;for(var h=[["readdir","exists","unlink","rmdir","readlink"],["stat","mkdir","realpath","truncate"],["open","readFile","chmod","utimes"],["chown"],["writeFile","appendFile"]],l=0;l<h.length;l++)for(var d=h[l],y=0;y<d.length;y++){var g=d[y];p.prototype[g]=s(g,!1,l+1),p.prototype[g+"Sync"]=s(g+"Sync",!0,l+1)}a.registerFileSystem("MountableFileSystem",p)}),function(){function t(t,e){var n=t.split("."),r=s;!(n[0]in r)&&r.execScript&&r.execScript("var "+n[0]);for(var i;n.length&&(i=n.shift());)n.length||e===a?r=r[i]?r[i]:r[i]={}:r[i]=e}function e(t){var e,n,r,i,o,a,s,f,c,p=t.length,h=0,l=Number.POSITIVE_INFINITY;for(f=0;p>f;++f)t[f]>h&&(h=t[f]),t[f]<l&&(l=t[f]);for(e=1<<h,n=new(u?Uint32Array:Array)(e),r=1,i=0,o=2;h>=r;){for(f=0;p>f;++f)if(t[f]===r){for(a=0,s=i,c=0;r>c;++c)a=a<<1|1&s,s>>=1;for(c=a;e>c;c+=o)n[c]=r<<16|f;++i}++r,i<<=1,o<<=1}return[n,h,l]}function n(t,e){switch(this.g=[],this.h=32768,this.c=this.f=this.d=this.k=0,this.input=u?new Uint8Array(t):t,this.l=!1,this.i=c,this.p=!1,(e||!(e={}))&&(e.index&&(this.d=e.index),e.bufferSize&&(this.h=e.bufferSize),e.bufferType&&(this.i=e.bufferType),e.resize&&(this.p=e.resize)),this.i){case f:this.a=32768,this.b=new(u?Uint8Array:Array)(32768+this.h+258);break;case c:this.a=0,this.b=new(u?Uint8Array:Array)(this.h),this.e=this.u,this.m=this.r,this.j=this.s;break;default:throw Error("invalid inflate mode")}}function r(t,e){for(var n,r=t.f,i=t.c,o=t.input,s=t.d;e>i;){if(n=o[s++],n===a)throw Error("input buffer is broken");r|=n<<i,i+=8}return n=r&(1<<e)-1,t.f=r>>>e,t.c=i-e,t.d=s,n}function i(t,e){for(var n,r,i,o=t.f,s=t.c,u=t.input,f=t.d,c=e[0],p=e[1];p>s&&(n=u[f++],n!==a);)o|=n<<s,s+=8;return r=c[o&(1<<p)-1],i=r>>>16,t.f=o>>i,t.c=s-i,t.d=f,65535&r}function o(t){function n(t,e,n){var o,a,s,u;for(u=0;t>u;)switch(o=i(this,e)){case 16:for(s=3+r(this,2);s--;)n[u++]=a;break;case 17:for(s=3+r(this,3);s--;)n[u++]=0;a=0;break;case 18:for(s=11+r(this,7);s--;)n[u++]=0;a=0;break;default:a=n[u++]=o}return n}var o,a,s,f,c=r(t,5)+257,p=r(t,5)+1,h=r(t,4)+4,l=new(u?Uint8Array:Array)(d.length);for(f=0;h>f;++f)l[d[f]]=r(t,3);o=e(l),a=new(u?Uint8Array:Array)(c),s=new(u?Uint8Array:Array)(p),t.j(e(n.call(t,c,o,a)),e(n.call(t,p,o,s)))}var a=void 0,s=this,u="undefined"!=typeof Uint8Array&&"undefined"!=typeof Uint16Array&&"undefined"!=typeof Uint32Array,f=0,c=1;n.prototype.t=function(){for(;!this.l;){var t=r(this,3);switch(1&t&&(this.l=!0),t>>>=1){case 0:var e=this.input,n=this.d,i=this.b,s=this.a,p=a,h=a,l=a,d=i.length,y=a;if(this.c=this.f=0,p=e[n++],p===a)throw Error("invalid uncompressed block header: LEN (first byte)");if(h=p,p=e[n++],p===a)throw Error("invalid uncompressed block header: LEN (second byte)");if(h|=p<<8,p=e[n++],p===a)throw Error("invalid uncompressed block header: NLEN (first byte)");if(l=p,p=e[n++],p===a)throw Error("invalid uncompressed block header: NLEN (second byte)");if(l|=p<<8,h===~l)throw Error("invalid uncompressed block header: length verify");if(n+h>e.length)throw Error("input buffer is broken");switch(this.i){case f:for(;s+h>i.length;){if(y=d-s,h-=y,u)i.set(e.subarray(n,n+y),s),s+=y,n+=y;else for(;y--;)i[s++]=e[n++];this.a=s,i=this.e(),s=this.a}break;case c:for(;s+h>i.length;)i=this.e({o:2});break;default:throw Error("invalid inflate mode")}if(u)i.set(e.subarray(n,n+h),s),s+=h,n+=h;else for(;h--;)i[s++]=e[n++];this.d=n,this.a=s,this.b=i;break;case 1:this.j(A,N);break;case 2:o(this);break;default:throw Error("unknown BTYPE: "+t)}}return this.m()};var p,h,l=[16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15],d=u?new Uint16Array(l):l,y=[3,4,5,6,7,8,9,10,11,13,15,17,19,23,27,31,35,43,51,59,67,83,99,115,131,163,195,227,258,258,258],g=u?new Uint16Array(y):y,w=[0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0,0,0],m=u?new Uint8Array(w):w,v=[1,2,3,4,5,7,9,13,17,25,33,49,65,97,129,193,257,385,513,769,1025,1537,2049,3073,4097,6145,8193,12289,16385,24577],b=u?new Uint16Array(v):v,E=[0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13],S=u?new Uint8Array(E):E,I=new(u?Uint8Array:Array)(288);for(p=0,h=I.length;h>p;++p)I[p]=143>=p?8:255>=p?9:279>=p?7:8;var _,F,A=e(I),x=new(u?Uint8Array:Array)(30);for(_=0,F=x.length;F>_;++_)x[_]=5;var N=e(x);n.prototype.j=function(t,e){var n=this.b,o=this.a;this.n=t;for(var a,s,u,f,c=n.length-258;256!==(a=i(this,t));)if(256>a)o>=c&&(this.a=o,n=this.e(),o=this.a),n[o++]=a;else for(s=a-257,f=g[s],0<m[s]&&(f+=r(this,m[s])),a=i(this,e),u=b[a],0<S[a]&&(u+=r(this,S[a])),o>=c&&(this.a=o,n=this.e(),o=this.a);f--;)n[o]=n[o++-u];for(;8<=this.c;)this.c-=8,this.d--;this.a=o},n.prototype.s=function(t,e){var n=this.b,o=this.a;this.n=t;for(var a,s,u,f,c=n.length;256!==(a=i(this,t));)if(256>a)o>=c&&(n=this.e(),c=n.length),n[o++]=a;else for(s=a-257,f=g[s],0<m[s]&&(f+=r(this,m[s])),a=i(this,e),u=b[a],0<S[a]&&(u+=r(this,S[a])),o+f>c&&(n=this.e(),c=n.length);f--;)n[o]=n[o++-u];for(;8<=this.c;)this.c-=8,this.d--;this.a=o},n.prototype.e=function(){var t,e,n=new(u?Uint8Array:Array)(this.a-32768),r=this.a-32768,i=this.b;if(u)n.set(i.subarray(32768,n.length));else for(t=0,e=n.length;e>t;++t)n[t]=i[t+32768];if(this.g.push(n),this.k+=n.length,u)i.set(i.subarray(r,r+32768));else for(t=0;32768>t;++t)i[t]=i[r+t];return this.a=32768,i},n.prototype.u=function(t){var e,n,r,i,o=0|this.input.length/this.d+1,a=this.input,s=this.b;return t&&("number"==typeof t.o&&(o=t.o),"number"==typeof t.q&&(o+=t.q)),2>o?(n=(a.length-this.d)/this.n[2],i=0|258*(n/2),r=i<s.length?s.length+i:s.length<<1):r=s.length*o,u?(e=new Uint8Array(r),e.set(s)):e=s,this.b=e},n.prototype.m=function(){var t,e,n,r,i,o=0,a=this.b,s=this.g,f=new(u?Uint8Array:Array)(this.k+(this.a-32768));if(0===s.length)return u?this.b.subarray(32768,this.a):this.b.slice(32768,this.a);for(e=0,n=s.length;n>e;++e)for(t=s[e],r=0,i=t.length;i>r;++r)f[o++]=t[r];for(e=32768,n=this.a;n>e;++e)f[o++]=a[e];return this.g=[],this.buffer=f},n.prototype.r=function(){var t,e=this.a;return u?this.p?(t=new Uint8Array(e),t.set(this.b.subarray(0,e))):t=this.b.subarray(0,e):(this.b.length>e&&(this.b.length=e),t=this.b),this.buffer=t},t("Zlib.RawInflate",n),t("Zlib.RawInflate.prototype.decompress",n.prototype.t);var L,U,D,T,O={ADAPTIVE:c,BLOCK:f};if(Object.keys)L=Object.keys(O);else for(U in L=[],D=0,O)L[D++]=U;for(D=0,T=L.length;T>D;++D)U=L[D],t("Zlib.RawInflate.BufferType."+U,O[U])}.call(this),u("zlib",function(t){return function(){var e;return e||t.Zlib.RawInflate}}(this));var f=this.__extends||function(t,e){function n(){this.constructor=t}for(var r in e)e.hasOwnProperty(r)&&(t[r]=e[r]);n.prototype=e.prototype,t.prototype=new n};u("backend/zipfs",["require","exports","../core/buffer","../core/api_error","../generic/file_index","../core/browserfs","../core/node_fs_stats","../core/file_system","../core/file_flag","../core/buffer_core_arraybuffer","../generic/preload_file","zlib"],function(t,e,n,r,i,o,a,s,u,c,p){function h(t,e){var n=31&e,r=(15&e>>5)-1,i=(e>>9)+1980,o=31&t,a=63&t>>5,s=t>>11;return new Date(i,r,n,s,a,o)}function l(t,e,n,r){return 0===r?"":t.toString(e?"utf8":"extended_ascii",n,n+r)}var d=r.ApiError;r.ErrorCode,u.ActionType;var y=Zlib.RawInflate;!function(t){t[t.MSDOS=0]="MSDOS",t[t.AMIGA=1]="AMIGA",t[t.OPENVMS=2]="OPENVMS",t[t.UNIX=3]="UNIX",t[t.VM_CMS=4]="VM_CMS",t[t.ATARI_ST=5]="ATARI_ST",t[t.OS2_HPFS=6]="OS2_HPFS",t[t.MAC=7]="MAC",t[t.Z_SYSTEM=8]="Z_SYSTEM",t[t.CP_M=9]="CP_M",t[t.NTFS=10]="NTFS",t[t.MVS=11]="MVS",t[t.VSE=12]="VSE",t[t.ACORN_RISC=13]="ACORN_RISC",t[t.VFAT=14]="VFAT",t[t.ALT_MVS=15]="ALT_MVS",t[t.BEOS=16]="BEOS",t[t.TANDEM=17]="TANDEM",t[t.OS_400=18]="OS_400",t[t.OSX=19]="OSX"
+}(e.ExternalFileAttributeType||(e.ExternalFileAttributeType={})),e.ExternalFileAttributeType,function(t){t[t.STORED=0]="STORED",t[t.SHRUNK=1]="SHRUNK",t[t.REDUCED_1=2]="REDUCED_1",t[t.REDUCED_2=3]="REDUCED_2",t[t.REDUCED_3=4]="REDUCED_3",t[t.REDUCED_4=5]="REDUCED_4",t[t.IMPLODE=6]="IMPLODE",t[t.DEFLATE=8]="DEFLATE",t[t.DEFLATE64=9]="DEFLATE64",t[t.TERSE_OLD=10]="TERSE_OLD",t[t.BZIP2=12]="BZIP2",t[t.LZMA=14]="LZMA",t[t.TERSE_NEW=18]="TERSE_NEW",t[t.LZ77=19]="LZ77",t[t.WAVPACK=97]="WAVPACK",t[t.PPMD=98]="PPMD"}(e.CompressionMethod||(e.CompressionMethod={}));var g=e.CompressionMethod,w=function(){function t(t){if(this.data=t,67324752!==t.readUInt32LE(0))throw new d(9,"Invalid Zip file: Local file header has invalid signature: "+this.data.readUInt32LE(0))}return t.prototype.versionNeeded=function(){return this.data.readUInt16LE(4)},t.prototype.flags=function(){return this.data.readUInt16LE(6)},t.prototype.compressionMethod=function(){return this.data.readUInt16LE(8)},t.prototype.lastModFileTime=function(){return h(this.data.readUInt16LE(10),this.data.readUInt16LE(12))},t.prototype.crc32=function(){return this.data.readUInt32LE(14)},t.prototype.fileNameLength=function(){return this.data.readUInt16LE(26)},t.prototype.extraFieldLength=function(){return this.data.readUInt16LE(28)},t.prototype.fileName=function(){return l(this.data,this.useUTF8(),30,this.fileNameLength())},t.prototype.extraField=function(){var t=30+this.fileNameLength();return this.data.slice(t,t+this.extraFieldLength())},t.prototype.totalSize=function(){return 30+this.fileNameLength()+this.extraFieldLength()},t.prototype.useUTF8=function(){return 2048===(2048&this.flags())},t}();e.FileHeader=w;var m=function(){function t(t,e,n){this.header=t,this.record=e,this.data=n}return t.prototype.decompress=function(){var t=this.data,e=this.header.compressionMethod();switch(e){case 8:if(t.getBufferCore()instanceof c.BufferCoreArrayBuffer){var r=t.getBufferCore(),i=r.getDataView(),o=i.byteOffset+t.getOffset(),a=new Uint8Array(i.buffer).subarray(o,o+this.record.compressedSize()),s=new y(a).decompress();return new n.Buffer(new c.BufferCoreArrayBuffer(s.buffer),s.byteOffset,s.byteOffset+s.length)}var u=t.slice(0,this.record.compressedSize());return new n.Buffer(new y(u.toJSON().data).decompress());case 0:return t.sliceCopy(0,this.record.uncompressedSize());default:var f=g[e];throw f=f?f:"Unknown: "+e,new d(9,"Invalid compression method on file '"+this.header.fileName()+"': "+f)}},t}();e.FileData=m;var v=function(){function t(t){this.data=t}return t.prototype.crc32=function(){return this.data.readUInt32LE(0)},t.prototype.compressedSize=function(){return this.data.readUInt32LE(4)},t.prototype.uncompressedSize=function(){return this.data.readUInt32LE(8)},t}();e.DataDescriptor=v;var b=function(){function t(t){if(this.data=t,134630224!==this.data.readUInt32LE(0))throw new d(9,"Invalid archive extra data record signature: "+this.data.readUInt32LE(0))}return t.prototype.length=function(){return this.data.readUInt32LE(4)},t.prototype.extraFieldData=function(){return this.data.slice(8,8+this.length())},t}();e.ArchiveExtraDataRecord=b;var E=function(){function t(t){if(this.data=t,84233040!==this.data.readUInt32LE(0))throw new d(9,"Invalid digital signature signature: "+this.data.readUInt32LE(0))}return t.prototype.size=function(){return this.data.readUInt16LE(4)},t.prototype.signatureData=function(){return this.data.slice(6,6+this.size())},t}();e.DigitalSignature=E;var S=function(){function t(t,e){if(this.zipData=t,this.data=e,33639248!==this.data.readUInt32LE(0))throw new d(9,"Invalid Zip file: Central directory record has invalid signature: "+this.data.readUInt32LE(0))}return t.prototype.versionMadeBy=function(){return this.data.readUInt16LE(4)},t.prototype.versionNeeded=function(){return this.data.readUInt16LE(6)},t.prototype.flag=function(){return this.data.readUInt16LE(8)},t.prototype.compressionMethod=function(){return this.data.readUInt16LE(10)},t.prototype.lastModFileTime=function(){return h(this.data.readUInt16LE(12),this.data.readUInt16LE(14))},t.prototype.crc32=function(){return this.data.readUInt32LE(16)},t.prototype.compressedSize=function(){return this.data.readUInt32LE(20)},t.prototype.uncompressedSize=function(){return this.data.readUInt32LE(24)},t.prototype.fileNameLength=function(){return this.data.readUInt16LE(28)},t.prototype.extraFieldLength=function(){return this.data.readUInt16LE(30)},t.prototype.fileCommentLength=function(){return this.data.readUInt16LE(32)},t.prototype.diskNumberStart=function(){return this.data.readUInt16LE(34)},t.prototype.internalAttributes=function(){return this.data.readUInt16LE(36)},t.prototype.externalAttributes=function(){return this.data.readUInt32LE(38)},t.prototype.headerRelativeOffset=function(){return this.data.readUInt32LE(42)},t.prototype.fileName=function(){var t=l(this.data,this.useUTF8(),46,this.fileNameLength());return t.replace(/\\/g,"/")},t.prototype.extraField=function(){var t=44+this.fileNameLength();return this.data.slice(t,t+this.extraFieldLength())},t.prototype.fileComment=function(){var t=46+this.fileNameLength()+this.extraFieldLength();return l(this.data,this.useUTF8(),t,this.fileCommentLength())},t.prototype.totalSize=function(){return 46+this.fileNameLength()+this.extraFieldLength()+this.fileCommentLength()},t.prototype.isDirectory=function(){var t=this.fileName();return(16&this.externalAttributes()?!0:!1)||"/"===t.charAt(t.length-1)},t.prototype.isFile=function(){return!this.isDirectory()},t.prototype.useUTF8=function(){return 2048===(2048&this.flag())},t.prototype.isEncrypted=function(){return 1===(1&this.flag())},t.prototype.getData=function(){var t=this.headerRelativeOffset(),e=new w(this.zipData.slice(t)),n=new m(e,this,this.zipData.slice(t+e.totalSize()));return n.decompress()},t.prototype.getStats=function(){return new a.Stats(32768,this.uncompressedSize(),365,new Date,this.lastModFileTime())},t}();e.CentralDirectory=S;var I=function(){function t(t){if(this.data=t,101010256!==this.data.readUInt32LE(0))throw new d(9,"Invalid Zip file: End of central directory record has invalid signature: "+this.data.readUInt32LE(0))}return t.prototype.diskNumber=function(){return this.data.readUInt16LE(4)},t.prototype.cdDiskNumber=function(){return this.data.readUInt16LE(6)},t.prototype.cdDiskEntryCount=function(){return this.data.readUInt16LE(8)},t.prototype.cdTotalEntryCount=function(){return this.data.readUInt16LE(10)},t.prototype.cdSize=function(){return this.data.readUInt32LE(12)},t.prototype.cdOffset=function(){return this.data.readUInt32LE(16)},t.prototype.cdZipComment=function(){return l(this.data,!0,22,this.data.readUInt16LE(20))},t}();e.EndOfCentralDirectory=I;var _=function(t){function e(e,n){"undefined"==typeof n&&(n=""),t.call(this),this.data=e,this.name=n,this._index=new i.FileIndex,this.populateIndex()}return f(e,t),e.prototype.getName=function(){return"ZipFS"+(""!==this.name?" "+this.name:"")},e.isAvailable=function(){return!0},e.prototype.diskSpace=function(t,e){e(this.data.length,0)},e.prototype.isReadOnly=function(){return!0},e.prototype.supportsLinks=function(){return!1},e.prototype.supportsProps=function(){return!1},e.prototype.supportsSynch=function(){return!0},e.prototype.statSync=function(t){var e=this._index.getInode(t);if(null===e)throw new d(1,""+t+" not found.");var n;return n=e.isFile()?e.getData().getStats():e.getStats()},e.prototype.openSync=function(t,e){if(e.isWriteable())throw new d(0,t);var n=this._index.getInode(t);if(null===n)throw new d(1,""+t+" is not in the FileIndex.");if(n.isDir())throw new d(8,""+t+" is a directory.");var r=n.getData(),i=r.getStats();switch(e.pathExistsAction()){case 1:case 2:throw new d(6,""+t+" already exists.");case 0:return new p.NoSyncFile(this,t,e,i,r.getData());default:throw new d(9,"Invalid FileMode object.")}return null},e.prototype.readdirSync=function(t){var e=this._index.getInode(t);if(null===e)throw new d(1,""+t+" not found.");if(e.isFile())throw new d(7,""+t+" is a file, not a directory.");return e.getListing()},e.prototype.readFileSync=function(t,e,r){var i=this.openSync(t,r,420);try{var o=i,a=o._buffer;return null===e?a.length>0?a.sliceCopy():new n.Buffer(0):a.toString(e)}finally{i.closeSync()}},e.prototype.getEOCD=function(){for(var t=22,e=Math.min(t+65535,this.data.length-1),n=t;e>n;n++)if(101010256===this.data.readUInt32LE(this.data.length-n))return new I(this.data.slice(this.data.length-n));throw new d(9,"Invalid ZIP file: Could not locate End of Central Directory signature.")},e.prototype.populateIndex=function(){var t=this.getEOCD();if(t.diskNumber()!==t.cdDiskNumber())throw new d(9,"ZipFS does not support spanned zip files.");var e=t.cdOffset();if(4294967295===e)throw new d(9,"ZipFS does not support Zip64.");for(var n=e+t.cdSize();n>e;){var r=new S(this.data,this.data.slice(e));e+=r.totalSize();var o=r.fileName();if("/"===o.charAt(0))throw new Error("WHY IS THIS ABSOLUTE");"/"===o.charAt(o.length-1)&&(o=o.substr(0,o.length-1)),r.isDirectory()?this._index.addPath("/"+o,new i.DirInode):this._index.addPath("/"+o,new i.FileInode(r))}},e}(s.SynchronousFileSystem);e.ZipFS=_,o.registerFileSystem("ZipFS",_)}),s("core/global").BrowserFS=s("core/browserfs"),s("generic/emscripten_fs"),s("backend/IndexedDB"),s("backend/XmlHttpRequest"),s("backend/dropbox"),s("backend/html5fs"),s("backend/in_memory"),s("backend/localStorage"),s("backend/mountable_file_system"),s("backend/zipfs")}();
diff --git a/emdosbox-launcher.js b/emdosbox-launcher.js
deleted file mode 100644
index a4f6aa4..0000000
--- a/emdosbox-launcher.js
+++ /dev/null
@@ -1,191 +0,0 @@
-var ar = new Array(33,34,35,36,37,38,39,40);
-
-function getfullscreenenabler() {
-  return canvas.webkitRequestFullScreen || canvas.mozRequestFullScreen || canvas.requestFullScreen;
-}
-
-function getpointerlockenabler() {
-  return canvas.requestPointerLock || canvas.mozRequestPointerLock || canvas.webkitRequestPointerLock;
-}
-
-function isfullscreensupported() {
-   return !!(getfullscreenenabler());
-}
-
-function gofullscreen() {
-  Module.requestFullScreen(1,0);
-}
-
-function keypress(e) {
-     if (typeof(loader_game)=='object'  &&  !loader_game.started)
-         return true; // Don't ignore certain keys yet (until game started by "click to play")
-
-     var key = e.which;
-     if($.inArray(key,ar) > -1) {
-         e.preventDefault(); //Don't let arrow, pg up/down, home, end affect page position
-         return false;
-     }
-     return true;
-}
-
-window.onkeydown = keypress;
-
-(function() {
-  function get(name) {
-    if (typeof(loader_game)=='object')
-      return loader_game[name]; //alternate case where dont have CGI args to parse...
-    if ((name = (new RegExp('[?&]'+encodeURIComponent(name)+'=([^&]*)')).exec(location.search))) {
-      return decodeURIComponent(name[1]);
-    }
-  }
-
-  var games;
-  var emulator;
-  var module;
-
-  function getmodule() {
-    module = get('module');
-    module = module ? module : 'test';
-  }
-
-  function init() {
-    getmodule();
-    ready();
-  }
-
-  function ready() {
-    var fullscreenbutton = document.getElementById('gofullscreen');
-    if (fullscreenbutton) {
-      if (isfullscreensupported()) {
-        fullscreenbutton.addEventListener('click', gofullscreen);
-        if ('onfullscreenchange' in document) {
-          document.addEventListener('fullscreenchange', DOSBOX.fullScreenChangeHandler);
-        } else if ('onmozfullscreenchange' in document) {
-          document.addEventListener('mozfullscreenchange', DOSBOX.fullScreenChangeHandler);
-        } else if ('onwebkitfullscreenchange' in document) {
-          document.addEventListener('webkitfullscreenchange', DOSBOX.fullScreenChangeHandler);
-        }
-      } else {
-        fullscreenbutton.disabled = true;
-      }
-    }
-    var canvas = document.getElementById('canvas');
-    emulator = new DOSBOX(canvas).setscale(get('scale') ? parseFloat(get('scale')) : 1)
-                                 .setmodule(module)
-                                 .setgame(getgameurl(loader_game));
-    disableRightClickContextMenu(canvas);
-
-    // Emscripten doesn't use the proper prefixed functions for fullscreen requests,
-    // so let's map the prefixed versions to the correct function.
-    canvas.requestPointerLock = getpointerlockenabler();
-
-    if (get('autostart')) {
-      emulator.start();
-    }
-    // Gamepad text
-    if (detectgamepadsupport()) {
-      var gamepadDiv = document.getElementById('gamepadtext');
-      gamepadDiv.innerHTML = "No gamepads detected. Press a button on a gamepad to use it.";
-      listenforgamepads(function(gamepads, newgamepad) {
-        var s = (gamepads.length === 1 ? '' : 's');
-        gamepadDiv.innerHTML = gamepads.length + ' gamepad'+s+' detected. If the game does not ' +
-                               'respond to your gamepad'+s+', refresh the browser and try again.';
-        if (emulator.hasStarted) {
-          gamepadDiv.innerHTML += "<br />Restart MESS to use new gamepads.";
-        }
-      });
-    }
-  }
-
-  function getgameurl(game) {
-    // NOTE: deliberately use cors.archive.org since this will 302 rewrite to iaXXXXX.us.archive.org/XX/items/...
-    // and need to keep that "artificial" extra domain-ish name to avoid CORS issues with IE/Safari
-    return (game === 'NONE') ? undefined
-                             : ('//cors.archive.org/cors/'+ game);
-  }
-
-  /**
-   * Disables the right click menu for the given element.
-   */
-  function disableRightClickContextMenu(element) {
-    element.addEventListener('contextmenu', function(e) {
-      if (e.button == 2) {
-        // Block right-click menu thru preventing default action.
-        e.preventDefault();
-      }
-    });
-  }
-
-  function switchgame(e) {
-    emulator.setgame(getgameurl(e.target.value));
-  }
-
-  // Firefox will not give us Joystick data unless we register this NOP
-  // callback.
-  // https://bugzilla.mozilla.org/show_bug.cgi?id=936104
-  addEventListener("gamepadconnected", function() {});
-  var getgamepads = navigator.getGamepads || navigator.webkitGamepads ||
-    navigator.mozGamepads || navigator.gamepads || navigator.webkitGetGamepads;
-  /**
-   * Does the current browser support the Gamepad API?
-   * Returns a boolean.
-   */
-  function detectgamepadsupport() {
-    return typeof getgamepads === 'function';
-  }
-  // The timer that listens for gamepads, in case we ever want to stop it.
-  var gamepadlistener;
-  /**
-   * Listens for new gamepads, and triggers the callback when it detects a
-   * change.
-   * The callback is passed an array of active gamepads.
-   */
-  function listenforgamepads(cb, freq) {
-    // NOP if the browser doesn't support gamepads.
-    if (!detectgamepadsupport()) return;
-    // Map from gamepad id to gamepad information.
-    var prevgamepads = {};
-    // DEFAULT: Check gamepads every second.
-    if (typeof freq === 'undefined') freq = 1000;
-    gamepadlistener = setInterval(function() {
-      // Browsers get cranky when you don't apply this on the navigator object.
-      var gamepads = getgamepads.apply(navigator);
-      var currentgamepads = {};
-      var i;
-      var hasChanged = false;
-      for (i = 0; i < gamepads.length; i++) {
-        var gamepad = gamepads[i];
-        if (gamepad != null) {
-          currentgamepads[gamepad.id] = gamepad;
-          if (!prevgamepads.hasOwnProperty(gamepad.id)) {
-            // Gamepad has been added.
-            hasChanged = true;
-          }
-        }
-      }
-
-      // Has a gamepad been removed?
-      if (!hasChanged) {
-        for (var gamepadid in prevgamepads) {
-          if (!currentgamepads.hasOwnProperty(gamepadid)) {
-            hasChanged = true;
-          }
-        }
-      }
-
-      prevgamepads = currentgamepads;
-
-      if (hasChanged) {
-        // Actual gamepads, filtered from gamepads. Chrome puts empty items into
-        // its gamepadlist.
-        var actualgamepads = [];
-        for (i = 0; i < gamepads.length; i++) {
-          if (gamepads[i] != null) actualgamepads.push(gamepads[i]);
-        }
-        cb(actualgamepads);
-      }
-    }, freq);
-  }
-
-  window.addEventListener('load', init);
-})();
diff --git a/emdosbox-loader.js b/emdosbox-loader.js
deleted file mode 100644
index 2ba596d..0000000
--- a/emdosbox-loader.js
+++ /dev/null
@@ -1,437 +0,0 @@
-var Module = null;
-
-function DOSBOX(canvas, module, game, precallback, callback, scale) {
-  var js_url;
-  var moduledata;
-  var requests = [];
-  var drawloadingtimer;
-  var file_countdown;
-  var spinnerrot = 0;
-  var splashimg = new Image();
-  var spinnerimg = new Image();
-  // TODO: Have an enum value that communicates the current state of DOSBOX, e.g. 'initializing', 'loading', 'running'.
-  var has_started = false;
-  var loading = false;
-  var LOADING_TEXT;
-  var splash_inverse = getComputedStyle(document.getElementsByTagName("body")[0]).backgroundColor === 'rgb(0, 0, 0)';
-
-  var SAMPLE_RATE = (function () {
-    var audio_ctx = window.AudioContext || window.webkitAudioContext || false;
-    if (!audio_ctx) {
-      return false;
-    }
-    var sample = new audio_ctx;
-    return sample.sampleRate.toString();
-  }());
-
-  // right off the bat we set the canvas's inner dimensions to
-  // whatever it's current css dimensions are; this isn't likely to be
-  // the same size that dosbox/jsmess will set it to, but it avoids
-  // the case where the size was left at the default 300x150
-  if (!canvas.hasAttribute("width")) {
-    canvas.width = parseInt(getComputedStyle(canvas).width, 10);
-    canvas.height = parseInt(getComputedStyle(canvas).height, 10);
-  }
-
-  var can_start = function () {
-    return !!canvas && !!module && !!game && !!scale && !has_started;
-  };
-
-  this.setscale = function(_scale) {
-    scale = _scale;
-    try_start();
-    return this;
-  };
-
-  this.setprecallback = function(_precallback) {
-    precallback = _precallback;
-    return this;
-  };
-
-  this.setcallback = function(_callback) {
-    callback = _callback;
-    return this;
-  };
-
-  this.setmodule = function(_module) {
-    module = _module;
-    try_start();
-    return this;
-  };
-
-  this.setgame = function(_game) {
-    game = _game;
-    try_start();
-    return this;
-  };
-
-  var draw_loading_status = function() {
-    var context = canvas.getContext('2d');
-    context.clearRect(0, 0, canvas.width, canvas.height);
-    context.drawImage(splashimg, canvas.width / 2 - (splashimg.width / 2), canvas.height / 3 - (splashimg.height / 2));
-    var spinnerpos = (canvas.height / 2 + splashimg.height / 2) + 16;
-    context.save();
-    context.translate((canvas.width / 2), spinnerpos);
-    context.rotate(spinnerrot);
-    context.drawImage(spinnerimg, -(64/2), -(64/2), 64, 64);
-    context.restore();
-    context.save();
-    context.font = '18px sans-serif';
-    context.fillStyle = splash_inverse ? 'white' : 'black';
-    context.textAlign = 'center';
-    context.fillText(LOADING_TEXT, canvas.width / 2, (canvas.height / 2) + (splashimg.height / 4));
-    context.restore();
-    spinnerrot += .25;
-  };
-
-  var progress_fetch_file = function(e) {
-    if (e.lengthComputable) {
-      e.target.progress = e.loaded / e.total;
-      e.target.loaded = e.loaded;
-      e.target.total = e.total;
-      e.target.lengthComputable = e.lengthComputable;
-    }
-  };
-
-  var fetch_file = function(title, url, cb, rt, raw, unmanaged) {
-    var xhr = new XMLHttpRequest();
-    xhr.open('GET', url, true);
-    xhr.responseType = rt ? rt : 'arraybuffer';
-    xhr.onload = function(e) {
-      if (xhr.status != 200) {
-        return;
-      }
-      if (!unmanaged) {
-        xhr.progress = 1.0;
-      }
-      var ints = raw ? xhr.response : new Int8Array(xhr.response);
-      cb(ints);
-    };
-    if (!unmanaged) {
-      xhr.onprogress = progress_fetch_file;
-      xhr.title = title;
-      xhr.progress = 0;
-      xhr.total = 0;
-      xhr.loaded = 0;
-      xhr.lengthComputable = false;
-      requests.push(xhr);
-    }
-    xhr.send();
-  };
-
-  var update_countdown = function() {
-    file_countdown -= 1;
-    if (file_countdown <= 0) {
-      loading = false;
-
-      if (js_url) {
-        var head = document.getElementsByTagName('head')[0];
-        var newScript = document.createElement('script');
-        newScript.type = 'text/javascript';
-        newScript.src = get_js_url(js_url);
-        head.appendChild(newScript);
-      }
-
-      // see archive.js for the mute/unmute button/JS
-      if (!($.cookie && $.cookie('unmute'))){
-        setTimeout(function(){
-          // someone moved it from 1st to 2nd!
-          if (DOSBOX && typeof(DOSBOX.sdl_pauseaudio)!='undefined')
-            DOSBOX.sdl_pauseaudio(1);
-          else if (typeof _SDL_PauseAudio !== "undefined")
-            _SDL_PauseAudio(1);
-        }, 3000);
-      }
-    }
-  };
-
-  var build_dosbox_arguments = function (config, emulator_start) {
-    LOADING_TEXT = 'Building arguments';
-    return ['/dosprogram/'+ emulator_start];
-  };
-
-  var get_game_name = function (game_path) {
-    return game_path.split('/').pop();
-  };
-
-  var get_meta_url = function (game_path) {
-    var path = game_path.split('/');
-    // NOTE: deliberately use cors.archive.org since this will 302 rewrite to iaXXXXX.us.archive.org/XX/items/...
-    // and need to keep that "artificial" extra domain-ish name to avoid CORS issues with IE/Safari
-    return "//cors.archive.org/cors/"+ path[4] +"/"+ path[4] +"_meta.xml";
-  };
-
-  var get_js_url = function (js_filename) {
-    // NOTE: deliberately use cors.archive.org since this will 302 rewrite to iaXXXXX.us.archive.org/XX/items/...
-    // and need to keep that "artificial" extra domain-ish name to avoid CORS issues with IE/Safari
-    return "//cors.archive.org/cors/jsmess_engine_v2/"+ js_filename;
-  };
-
-  var init_module = function() {
-    if (moduledata == null) {
-      // HACK: Module data isn't ready yet. It'll call us once loaded.
-      return;
-    }
-    LOADING_TEXT = 'Loading Program';
-    var modulecfg = JSON.parse(moduledata);
-    js_url = modulecfg['js_filename'];
-
-    var game_file = null,
-        meta_file = null;
-
-    var nr = modulecfg['native_resolution'];
-    DOSBOX.width = nr[0] * scale;
-    DOSBOX.height = nr[1] * scale;
-
-    // Makes the keyboard 'focusable' to let the canvas accept keyboard input.
-    // http://gamedev.stackexchange.com/questions/50223/receiving-keyboard-events-on-a-canvas-in-javascript
-    canvas.setAttribute('tabindex', '0');
-    // Emscripten blocks the 'default action' of all mouse events, which
-    // prevents users from selecting the canvas for keyboard input!
-    // Prevent Emscripten from blocking users from selecting the canvas by
-    // manually 'focusing' the canvas when it is clicked.
-    canvas.addEventListener('mousedown', function() {
-      canvas.focus();
-    });
-    // Start the canvas focused.
-    canvas.focus();
-
-    Module = {
-      arguments: undefined,
-      screenIsReadOnly: true,
-      print: (function() {
-        return function(text) {
-          console.log(text);
-        };
-      })(),
-      canvas: canvas,
-      // Prevent Emscripten from listening / blocking key events to the rest of the page by
-      // isolating keyboard input to the canvas.
-      keyboardListeningElement: canvas,
-      noInitialRun: false,
-      locateFile: function (file) {
-                    if ("file_locations" in modulecfg && file in modulecfg.file_locations) {
-                      return get_js_url(modulecfg.file_locations[file]);
-                    }
-                    throw new Error("Don't know how to find file: "+ file);
-                  },
-      preInit: function() {
-        Module.arguments = build_dosbox_arguments(modulecfg,
-                                                  meta_file.getElementsByTagName("emulator_start")
-                                                           .item(0)
-                                                           .textContent);;
-        LOADING_TEXT = 'Loading game file into file system';
-        DOSBOX.BFSMountZip(game_file);
-        DOSBOX.moveConfigToRoot();
-        window.clearInterval(drawloadingtimer);
-        if (callback) {
-          modulecfg.canvas = canvas;
-          window.setTimeout(function() { callback(modulecfg); }, 0);
-        }
-      }
-    };
-
-    file_countdown = 2;
-
-    fetch_file('Metadata',
-               get_meta_url(game),
-               function(data) {
-                   meta_file = data;
-                   update_countdown();
-               },
-               'document', true);
-    fetch_file('Game',
-               game,
-               function(data) {
-                   game_file = new BrowserFS.BFSRequire('buffer').Buffer(data);
-                   update_countdown();
-               });
-  };
-
-  var keyevent = function(e) {
-    if (typeof(loader_game)=='object') return; // game will start with click-to-play instead of [SPACE] char
-    if (e.which == 32) {
-      e.preventDefault();
-      start();
-    }
-  };
-
-  var start = function() {
-    // Prevent loading the game multiple times.
-    if (loading) {
-      return false;
-    }
-    window.removeEventListener('keypress', keyevent);
-    canvas.removeEventListener('click', start);
-    loading = true;
-    drawloadingtimer = window.setInterval(draw_loading_status, 1000/60);
-    if (precallback) {
-      window.setTimeout(precallback, 0);
-    }
-    init_module();
-    return this;
-  };
-  this.start = start;
-  window.DOSBOXstart = start;//global hook to method (so can be invoked with a "click to play" image being clicked)
-
-  var drawsplash = function() {
-    var context = canvas.getContext('2d');
-    splashimg.onload = function(){
-      context.clearRect(0, 0, canvas.width, canvas.height);
-      context.save();
-      context.drawImage(splashimg, canvas.width / 2 - (splashimg.width / 2), canvas.height / 3 - (splashimg.height / 2));
-      context.font = '18px sans-serif';
-      context.fillStyle = splash_inverse ? 'white' : 'black';
-      context.textAlign = 'center';
-      context.fillText('Click here to start', canvas.width / 2, (canvas.height / 2) + (splashimg.height / 2));
-      context.textAlign = 'start';
-      context.restore();
-    };
-    spinnerimg.onload = function() {
-      splashimg.src = '/images/dosbox.png';;
-    };
-    spinnerimg.src = '/images/spinner.png';
-  };
-
-  var configLoaded = function (data) {
-    moduledata = data;
-    window.addEventListener('keypress', keyevent);
-    canvas.addEventListener('click', start);
-    drawsplash();
-    if (loading) {
-      // HACK: User clicked play before module metadata loaded, and play aborted.
-      // Now that metadata is ready, begin playing.
-      init_module();
-    }
-  };
-
-  function try_start () {
-    if (!can_start()) {
-      return;
-    }
-    LOADING_TEXT = "Fetching item metadata...";
-    has_started = true;
-    // NOTE: deliberately use cors.archive.org since this will 302 rewrite to iaXXXXX.us.archive.org/XX/items/jsmess_engine_v2/...json
-    // and need to keep that "artificial" extra domain-ish name to avoid CORS issues with IE/Safari
-    fetch_file('ModuleInfo', '//cors.archive.org/cors/jsmess_engine_v2/' + module + '.json', configLoaded, 'text', true, true);
-  }
-
-  try_start();
-}
-
-DOSBOX._readySet = false;
-
-DOSBOX._readyList = [];
-
-DOSBOX._runReadies = function() {
-  if (DOSBOX._readyList) {
-    for (var r=0; r < DOSBOX._readyList.length; r++) {
-      DOSBOX._readyList[r].call(window, []);
-    };
-    DOSBOX._readyList = [];
-  };
-};
-
-DOSBOX._readyCheck = function() {
-  if (DOSBOX.running) {
-    DOSBOX._runReadies();
-  } else {
-    DOSBOX._readySet = setTimeout(DOSBOX._readyCheck, 10);
-  };
-};
-
-DOSBOX.ready = function(r) {
-  if (DOSBOX.running) {
-    r.call(window, []);
-  } else {
-    DOSBOX._readyList.push(function() { canvas.style.width = DOSBOX.width + 'px'; canvas.style.height = DOSBOX.height + 'px'; } );
-    if (!(DOSBOX._readySet)) {
-      DOSBOX._readyCheck();
-    }
-  };
-}
-
-DOSBOX.setScale = function() {
-  Module.canvas.style.width = DOSBOX.width + 'px';
-  Module.canvas.style.height = DOSBOX.height + 'px';
-};
-
-DOSBOX.fullScreenChangeHandler = function() {
-  if (!(document.mozFullScreenElement || document.fullScreenElement)) {
-      setTimeout(DOSBOX.setScale, 0);
-  }
-};
-
-DOSBOX.BFSMountZip = function BFSMount(loadedData) {
-    var zipfs = new BrowserFS.FileSystem.ZipFS(loadedData),
-        mfs = new BrowserFS.FileSystem.MountableFileSystem(),
-        memfs = new BrowserFS.FileSystem.InMemory();
-    mfs.mount('/zip', zipfs);
-    mfs.mount('/mem', memfs);
-    BrowserFS.initialize(mfs);
-    // Copy the read-only zip file contents to a writable in-memory storage.
-    this.recursiveCopy('/zip', '/mem');
-    // Re-initialize BFS to just use the writable in-memory storage.
-    BrowserFS.initialize(memfs);
-    // Mount the file system into Emscripten.
-    var BFS = new BrowserFS.EmscriptenFS();
-    FS.mkdir('/dosprogram');
-    FS.mount(BFS, {root: '/'}, '/dosprogram');
-};
-
-// Helper function: Recursively copies contents from one folder to another.
-DOSBOX.recursiveCopy = function recursiveCopy(oldDir, newDir) {
-    var path = BrowserFS.BFSRequire('path'),
-        fs = BrowserFS.BFSRequire('fs');
-    copyDirectory(oldDir, newDir);
-    function copyDirectory(oldDir, newDir) {
-        if (!fs.existsSync(newDir)) {
-            fs.mkdirSync(newDir);
-        }
-        fs.readdirSync(oldDir).forEach(function(item) {
-            var p = path.resolve(oldDir, item),
-                newP = path.resolve(newDir, item);
-            if (fs.statSync(p).isDirectory()) {
-                copyDirectory(p, newP);
-            } else {
-                copyFile(p, newP);
-            }
-        });
-    }
-    function copyFile(oldFile, newFile) {
-        fs.writeFileSync(newFile, fs.readFileSync(oldFile));
-    }
-};
-
-/**
- * Searches for dosbox.conf, and moves it to '/dosbox.conf' so dosbox uses it.
- */
-DOSBOX.moveConfigToRoot = function moveConfigToRoot() {
-  if (typeof FS !== 'undefined') {
-    var dosboxConfPath = null;
-    // Recursively search for dosbox.conf.
-    function searchDirectory(dirPath) {
-      FS.readdir(dirPath).forEach(function(item) {
-        // Avoid infinite recursion by ignoring these entries, which exist at
-        // the root.
-        if (item === '.' || item === '..') {
-          return;
-        }
-        // Append '/' between dirPath and the item's name... unless dirPath
-        // already ends in it (which always occurs if dirPath is the root, '/').
-        var itemPath = dirPath + (dirPath[dirPath.length - 1] !== '/' ? "/" : "") + item,
-          itemStat = FS.stat(itemPath);
-        if (FS.isDir(itemStat.mode)) {
-          searchDirectory(itemPath);
-        } else if (item === 'dosbox.conf') {
-          dosboxConfPath = itemPath;
-        }
-      });
-    }
-    searchDirectory('/');
-
-    if (dosboxConfPath !== null) {
-      FS.writeFile('/dosbox.conf', FS.readFile(dosboxConfPath), { encoding: 'binary' });
-    }
-  }
-};
diff --git a/es6-promise.js b/es6-promise.js
new file mode 100644
index 0000000..ee1ba96
--- /dev/null
+++ b/es6-promise.js
@@ -0,0 +1,960 @@
+/*!
+ * @overview es6-promise - a tiny implementation of Promises/A+.
+ * @copyright Copyright (c) 2014 Yehuda Katz, Tom Dale, Stefan Penner and contributors (Conversion to ES6 API by Jake Archibald)
+ * @license   Licensed under MIT license
+ *            See https://raw.githubusercontent.com/jakearchibald/es6-promise/master/LICENSE
+ * @version   2.0.0
+ */
+
+(function() {
+    "use strict";
+
+    function $$utils$$objectOrFunction(x) {
+      return typeof x === 'function' || (typeof x === 'object' && x !== null);
+    }
+
+    function $$utils$$isFunction(x) {
+      return typeof x === 'function';
+    }
+
+    function $$utils$$isMaybeThenable(x) {
+      return typeof x === 'object' && x !== null;
+    }
+
+    var $$utils$$_isArray;
+
+    if (!Array.isArray) {
+      $$utils$$_isArray = function (x) {
+        return Object.prototype.toString.call(x) === '[object Array]';
+      };
+    } else {
+      $$utils$$_isArray = Array.isArray;
+    }
+
+    var $$utils$$isArray = $$utils$$_isArray;
+    var $$utils$$now = Date.now || function() { return new Date().getTime(); };
+    function $$utils$$F() { }
+
+    var $$utils$$o_create = (Object.create || function (o) {
+      if (arguments.length > 1) {
+        throw new Error('Second argument not supported');
+      }
+      if (typeof o !== 'object') {
+        throw new TypeError('Argument must be an object');
+      }
+      $$utils$$F.prototype = o;
+      return new $$utils$$F();
+    });
+
+    var $$asap$$len = 0;
+
+    var $$asap$$default = function asap(callback, arg) {
+      $$asap$$queue[$$asap$$len] = callback;
+      $$asap$$queue[$$asap$$len + 1] = arg;
+      $$asap$$len += 2;
+      if ($$asap$$len === 2) {
+        // If len is 1, that means that we need to schedule an async flush.
+        // If additional callbacks are queued before the queue is flushed, they
+        // will be processed by this flush that we are scheduling.
+        $$asap$$scheduleFlush();
+      }
+    };
+
+    var $$asap$$browserGlobal = (typeof window !== 'undefined') ? window : {};
+    var $$asap$$BrowserMutationObserver = $$asap$$browserGlobal.MutationObserver || $$asap$$browserGlobal.WebKitMutationObserver;
+
+    // test for web worker but not in IE10
+    var $$asap$$isWorker = typeof Uint8ClampedArray !== 'undefined' &&
+      typeof importScripts !== 'undefined' &&
+      typeof MessageChannel !== 'undefined';
+
+    // node
+    function $$asap$$useNextTick() {
+      return function() {
+        process.nextTick($$asap$$flush);
+      };
+    }
+
+    function $$asap$$useMutationObserver() {
+      var iterations = 0;
+      var observer = new $$asap$$BrowserMutationObserver($$asap$$flush);
+      var node = document.createTextNode('');
+      observer.observe(node, { characterData: true });
+
+      return function() {
+        node.data = (iterations = ++iterations % 2);
+      };
+    }
+
+    // web worker
+    function $$asap$$useMessageChannel() {
+      var channel = new MessageChannel();
+      channel.port1.onmessage = $$asap$$flush;
+      return function () {
+        channel.port2.postMessage(0);
+      };
+    }
+
+    function $$asap$$useSetTimeout() {
+      return function() {
+        setTimeout($$asap$$flush, 1);
+      };
+    }
+
+    var $$asap$$queue = new Array(1000);
+
+    function $$asap$$flush() {
+      for (var i = 0; i < $$asap$$len; i+=2) {
+        var callback = $$asap$$queue[i];
+        var arg = $$asap$$queue[i+1];
+
+        callback(arg);
+
+        $$asap$$queue[i] = undefined;
+        $$asap$$queue[i+1] = undefined;
+      }
+
+      $$asap$$len = 0;
+    }
+
+    var $$asap$$scheduleFlush;
+
+    // Decide what async method to use to triggering processing of queued callbacks:
+    if (typeof process !== 'undefined' && {}.toString.call(process) === '[object process]') {
+      $$asap$$scheduleFlush = $$asap$$useNextTick();
+    } else if ($$asap$$BrowserMutationObserver) {
+      $$asap$$scheduleFlush = $$asap$$useMutationObserver();
+    } else if ($$asap$$isWorker) {
+      $$asap$$scheduleFlush = $$asap$$useMessageChannel();
+    } else {
+      $$asap$$scheduleFlush = $$asap$$useSetTimeout();
+    }
+
+    function $$$internal$$noop() {}
+    var $$$internal$$PENDING   = void 0;
+    var $$$internal$$FULFILLED = 1;
+    var $$$internal$$REJECTED  = 2;
+    var $$$internal$$GET_THEN_ERROR = new $$$internal$$ErrorObject();
+
+    function $$$internal$$selfFullfillment() {
+      return new TypeError("You cannot resolve a promise with itself");
+    }
+
+    function $$$internal$$cannotReturnOwn() {
+      return new TypeError('A promises callback cannot return that same promise.')
+    }
+
+    function $$$internal$$getThen(promise) {
+      try {
+        return promise.then;
+      } catch(error) {
+        $$$internal$$GET_THEN_ERROR.error = error;
+        return $$$internal$$GET_THEN_ERROR;
+      }
+    }
+
+    function $$$internal$$tryThen(then, value, fulfillmentHandler, rejectionHandler) {
+      try {
+        then.call(value, fulfillmentHandler, rejectionHandler);
+      } catch(e) {
+        return e;
+      }
+    }
+
+    function $$$internal$$handleForeignThenable(promise, thenable, then) {
+       $$asap$$default(function(promise) {
+        var sealed = false;
+        var error = $$$internal$$tryThen(then, thenable, function(value) {
+          if (sealed) { return; }
+          sealed = true;
+          if (thenable !== value) {
+            $$$internal$$resolve(promise, value);
+          } else {
+            $$$internal$$fulfill(promise, value);
+          }
+        }, function(reason) {
+          if (sealed) { return; }
+          sealed = true;
+
+          $$$internal$$reject(promise, reason);
+        }, 'Settle: ' + (promise._label || ' unknown promise'));
+
+        if (!sealed && error) {
+          sealed = true;
+          $$$internal$$reject(promise, error);
+        }
+      }, promise);
+    }
+
+    function $$$internal$$handleOwnThenable(promise, thenable) {
+      if (thenable._state === $$$internal$$FULFILLED) {
+        $$$internal$$fulfill(promise, thenable._result);
+      } else if (promise._state === $$$internal$$REJECTED) {
+        $$$internal$$reject(promise, thenable._result);
+      } else {
+        $$$internal$$subscribe(thenable, undefined, function(value) {
+          $$$internal$$resolve(promise, value);
+        }, function(reason) {
+          $$$internal$$reject(promise, reason);
+        });
+      }
+    }
+
+    function $$$internal$$handleMaybeThenable(promise, maybeThenable) {
+      if (maybeThenable.constructor === promise.constructor) {
+        $$$internal$$handleOwnThenable(promise, maybeThenable);
+      } else {
+        var then = $$$internal$$getThen(maybeThenable);
+
+        if (then === $$$internal$$GET_THEN_ERROR) {
+          $$$internal$$reject(promise, $$$internal$$GET_THEN_ERROR.error);
+        } else if (then === undefined) {
+          $$$internal$$fulfill(promise, maybeThenable);
+        } else if ($$utils$$isFunction(then)) {
+          $$$internal$$handleForeignThenable(promise, maybeThenable, then);
+        } else {
+          $$$internal$$fulfill(promise, maybeThenable);
+        }
+      }
+    }
+
+    function $$$internal$$resolve(promise, value) {
+      if (promise === value) {
+        $$$internal$$reject(promise, $$$internal$$selfFullfillment());
+      } else if ($$utils$$objectOrFunction(value)) {
+        $$$internal$$handleMaybeThenable(promise, value);
+      } else {
+        $$$internal$$fulfill(promise, value);
+      }
+    }
+
+    function $$$internal$$publishRejection(promise) {
+      if (promise._onerror) {
+        promise._onerror(promise._result);
+      }
+
+      $$$internal$$publish(promise);
+    }
+
+    function $$$internal$$fulfill(promise, value) {
+      if (promise._state !== $$$internal$$PENDING) { return; }
+
+      promise._result = value;
+      promise._state = $$$internal$$FULFILLED;
+
+      if (promise._subscribers.length === 0) {
+      } else {
+        $$asap$$default($$$internal$$publish, promise);
+      }
+    }
+
+    function $$$internal$$reject(promise, reason) {
+      if (promise._state !== $$$internal$$PENDING) { return; }
+      promise._state = $$$internal$$REJECTED;
+      promise._result = reason;
+
+      $$asap$$default($$$internal$$publishRejection, promise);
+    }
+
+    function $$$internal$$subscribe(parent, child, onFulfillment, onRejection) {
+      var subscribers = parent._subscribers;
+      var length = subscribers.length;
+
+      parent._onerror = null;
+
+      subscribers[length] = child;
+      subscribers[length + $$$internal$$FULFILLED] = onFulfillment;
+      subscribers[length + $$$internal$$REJECTED]  = onRejection;
+
+      if (length === 0 && parent._state) {
+        $$asap$$default($$$internal$$publish, parent);
+      }
+    }
+
+    function $$$internal$$publish(promise) {
+      var subscribers = promise._subscribers;
+      var settled = promise._state;
+
+      if (subscribers.length === 0) { return; }
+
+      var child, callback, detail = promise._result;
+
+      for (var i = 0; i < subscribers.length; i += 3) {
+        child = subscribers[i];
+        callback = subscribers[i + settled];
+
+        if (child) {
+          $$$internal$$invokeCallback(settled, child, callback, detail);
+        } else {
+          callback(detail);
+        }
+      }
+
+      promise._subscribers.length = 0;
+    }
+
+    function $$$internal$$ErrorObject() {
+      this.error = null;
+    }
+
+    var $$$internal$$TRY_CATCH_ERROR = new $$$internal$$ErrorObject();
+
+    function $$$internal$$tryCatch(callback, detail) {
+      try {
+        return callback(detail);
+      } catch(e) {
+        $$$internal$$TRY_CATCH_ERROR.error = e;
+        return $$$internal$$TRY_CATCH_ERROR;
+      }
+    }
+
+    function $$$internal$$invokeCallback(settled, promise, callback, detail) {
+      var hasCallback = $$utils$$isFunction(callback),
+          value, error, succeeded, failed;
+
+      if (hasCallback) {
+        value = $$$internal$$tryCatch(callback, detail);
+
+        if (value === $$$internal$$TRY_CATCH_ERROR) {
+          failed = true;
+          error = value.error;
+          value = null;
+        } else {
+          succeeded = true;
+        }
+
+        if (promise === value) {
+          $$$internal$$reject(promise, $$$internal$$cannotReturnOwn());
+          return;
+        }
+
+      } else {
+        value = detail;
+        succeeded = true;
+      }
+
+      if (promise._state !== $$$internal$$PENDING) {
+        // noop
+      } else if (hasCallback && succeeded) {
+        $$$internal$$resolve(promise, value);
+      } else if (failed) {
+        $$$internal$$reject(promise, error);
+      } else if (settled === $$$internal$$FULFILLED) {
+        $$$internal$$fulfill(promise, value);
+      } else if (settled === $$$internal$$REJECTED) {
+        $$$internal$$reject(promise, value);
+      }
+    }
+
+    function $$$internal$$initializePromise(promise, resolver) {
+      try {
+        resolver(function resolvePromise(value){
+          $$$internal$$resolve(promise, value);
+        }, function rejectPromise(reason) {
+          $$$internal$$reject(promise, reason);
+        });
+      } catch(e) {
+        $$$internal$$reject(promise, e);
+      }
+    }
+
+    function $$$enumerator$$makeSettledResult(state, position, value) {
+      if (state === $$$internal$$FULFILLED) {
+        return {
+          state: 'fulfilled',
+          value: value
+        };
+      } else {
+        return {
+          state: 'rejected',
+          reason: value
+        };
+      }
+    }
+
+    function $$$enumerator$$Enumerator(Constructor, input, abortOnReject, label) {
+      this._instanceConstructor = Constructor;
+      this.promise = new Constructor($$$internal$$noop, label);
+      this._abortOnReject = abortOnReject;
+
+      if (this._validateInput(input)) {
+        this._input     = input;
+        this.length     = input.length;
+        this._remaining = input.length;
+
+        this._init();
+
+        if (this.length === 0) {
+          $$$internal$$fulfill(this.promise, this._result);
+        } else {
+          this.length = this.length || 0;
+          this._enumerate();
+          if (this._remaining === 0) {
+            $$$internal$$fulfill(this.promise, this._result);
+          }
+        }
+      } else {
+        $$$internal$$reject(this.promise, this._validationError());
+      }
+    }
+
+    $$$enumerator$$Enumerator.prototype._validateInput = function(input) {
+      return $$utils$$isArray(input);
+    };
+
+    $$$enumerator$$Enumerator.prototype._validationError = function() {
+      return new Error('Array Methods must be provided an Array');
+    };
+
+    $$$enumerator$$Enumerator.prototype._init = function() {
+      this._result = new Array(this.length);
+    };
+
+    var $$$enumerator$$default = $$$enumerator$$Enumerator;
+
+    $$$enumerator$$Enumerator.prototype._enumerate = function() {
+      var length  = this.length;
+      var promise = this.promise;
+      var input   = this._input;
+
+      for (var i = 0; promise._state === $$$internal$$PENDING && i < length; i++) {
+        this._eachEntry(input[i], i);
+      }
+    };
+
+    $$$enumerator$$Enumerator.prototype._eachEntry = function(entry, i) {
+      var c = this._instanceConstructor;
+      if ($$utils$$isMaybeThenable(entry)) {
+        if (entry.constructor === c && entry._state !== $$$internal$$PENDING) {
+          entry._onerror = null;
+          this._settledAt(entry._state, i, entry._result);
+        } else {
+          this._willSettleAt(c.resolve(entry), i);
+        }
+      } else {
+        this._remaining--;
+        this._result[i] = this._makeResult($$$internal$$FULFILLED, i, entry);
+      }
+    };
+
+    $$$enumerator$$Enumerator.prototype._settledAt = function(state, i, value) {
+      var promise = this.promise;
+
+      if (promise._state === $$$internal$$PENDING) {
+        this._remaining--;
+
+        if (this._abortOnReject && state === $$$internal$$REJECTED) {
+          $$$internal$$reject(promise, value);
+        } else {
+          this._result[i] = this._makeResult(state, i, value);
+        }
+      }
+
+      if (this._remaining === 0) {
+        $$$internal$$fulfill(promise, this._result);
+      }
+    };
+
+    $$$enumerator$$Enumerator.prototype._makeResult = function(state, i, value) {
+      return value;
+    };
+
+    $$$enumerator$$Enumerator.prototype._willSettleAt = function(promise, i) {
+      var enumerator = this;
+
+      $$$internal$$subscribe(promise, undefined, function(value) {
+        enumerator._settledAt($$$internal$$FULFILLED, i, value);
+      }, function(reason) {
+        enumerator._settledAt($$$internal$$REJECTED, i, reason);
+      });
+    };
+
+    var $$promise$all$$default = function all(entries, label) {
+      return new $$$enumerator$$default(this, entries, true /* abort on reject */, label).promise;
+    };
+
+    var $$promise$race$$default = function race(entries, label) {
+      /*jshint validthis:true */
+      var Constructor = this;
+
+      var promise = new Constructor($$$internal$$noop, label);
+
+      if (!$$utils$$isArray(entries)) {
+        $$$internal$$reject(promise, new TypeError('You must pass an array to race.'));
+        return promise;
+      }
+
+      var length = entries.length;
+
+      function onFulfillment(value) {
+        $$$internal$$resolve(promise, value);
+      }
+
+      function onRejection(reason) {
+        $$$internal$$reject(promise, reason);
+      }
+
+      for (var i = 0; promise._state === $$$internal$$PENDING && i < length; i++) {
+        $$$internal$$subscribe(Constructor.resolve(entries[i]), undefined, onFulfillment, onRejection);
+      }
+
+      return promise;
+    };
+
+    var $$promise$resolve$$default = function resolve(object, label) {
+      /*jshint validthis:true */
+      var Constructor = this;
+
+      if (object && typeof object === 'object' && object.constructor === Constructor) {
+        return object;
+      }
+
+      var promise = new Constructor($$$internal$$noop, label);
+      $$$internal$$resolve(promise, object);
+      return promise;
+    };
+
+    var $$promise$reject$$default = function reject(reason, label) {
+      /*jshint validthis:true */
+      var Constructor = this;
+      var promise = new Constructor($$$internal$$noop, label);
+      $$$internal$$reject(promise, reason);
+      return promise;
+    };
+
+    var $$es6$promise$promise$$counter = 0;
+
+    function $$es6$promise$promise$$needsResolver() {
+      throw new TypeError('You must pass a resolver function as the first argument to the promise constructor');
+    }
+
+    function $$es6$promise$promise$$needsNew() {
+      throw new TypeError("Failed to construct 'Promise': Please use the 'new' operator, this object constructor cannot be called as a function.");
+    }
+
+    var $$es6$promise$promise$$default = $$es6$promise$promise$$Promise;
+
+    /**
+      Promise objects represent the eventual result of an asynchronous operation. The
+      primary way of interacting with a promise is through its `then` method, which
+      registers callbacks to receive either a promise’s eventual value or the reason
+      why the promise cannot be fulfilled.
+
+      Terminology
+      -----------
+
+      - `promise` is an object or function with a `then` method whose behavior conforms to this specification.
+      - `thenable` is an object or function that defines a `then` method.
+      - `value` is any legal JavaScript value (including undefined, a thenable, or a promise).
+      - `exception` is a value that is thrown using the throw statement.
+      - `reason` is a value that indicates why a promise was rejected.
+      - `settled` the final resting state of a promise, fulfilled or rejected.
+
+      A promise can be in one of three states: pending, fulfilled, or rejected.
+
+      Promises that are fulfilled have a fulfillment value and are in the fulfilled
+      state.  Promises that are rejected have a rejection reason and are in the
+      rejected state.  A fulfillment value is never a thenable.
+
+      Promises can also be said to *resolve* a value.  If this value is also a
+      promise, then the original promise's settled state will match the value's
+      settled state.  So a promise that *resolves* a promise that rejects will
+      itself reject, and a promise that *resolves* a promise that fulfills will
+      itself fulfill.
+
+
+      Basic Usage:
+      ------------
+
+      ```js
+      var promise = new Promise(function(resolve, reject) {
+        // on success
+        resolve(value);
+
+        // on failure
+        reject(reason);
+      });
+
+      promise.then(function(value) {
+        // on fulfillment
+      }, function(reason) {
+        // on rejection
+      });
+      ```
+
+      Advanced Usage:
+      ---------------
+
+      Promises shine when abstracting away asynchronous interactions such as
+      `XMLHttpRequest`s.
+
+      ```js
+      function getJSON(url) {
+        return new Promise(function(resolve, reject){
+          var xhr = new XMLHttpRequest();
+
+          xhr.open('GET', url);
+          xhr.onreadystatechange = handler;
+          xhr.responseType = 'json';
+          xhr.setRequestHeader('Accept', 'application/json');
+          xhr.send();
+
+          function handler() {
+            if (this.readyState === this.DONE) {
+              if (this.status === 200) {
+                resolve(this.response);
+              } else {
+                reject(new Error('getJSON: `' + url + '` failed with status: [' + this.status + ']'));
+              }
+            }
+          };
+        });
+      }
+
+      getJSON('/posts.json').then(function(json) {
+        // on fulfillment
+      }, function(reason) {
+        // on rejection
+      });
+      ```
+
+      Unlike callbacks, promises are great composable primitives.
+
+      ```js
+      Promise.all([
+        getJSON('/posts'),
+        getJSON('/comments')
+      ]).then(function(values){
+        values[0] // => postsJSON
+        values[1] // => commentsJSON
+
+        return values;
+      });
+      ```
+
+      @class Promise
+      @param {function} resolver
+      Useful for tooling.
+      @constructor
+    */
+    function $$es6$promise$promise$$Promise(resolver) {
+      this._id = $$es6$promise$promise$$counter++;
+      this._state = undefined;
+      this._result = undefined;
+      this._subscribers = [];
+
+      if ($$$internal$$noop !== resolver) {
+        if (!$$utils$$isFunction(resolver)) {
+          $$es6$promise$promise$$needsResolver();
+        }
+
+        if (!(this instanceof $$es6$promise$promise$$Promise)) {
+          $$es6$promise$promise$$needsNew();
+        }
+
+        $$$internal$$initializePromise(this, resolver);
+      }
+    }
+
+    $$es6$promise$promise$$Promise.all = $$promise$all$$default;
+    $$es6$promise$promise$$Promise.race = $$promise$race$$default;
+    $$es6$promise$promise$$Promise.resolve = $$promise$resolve$$default;
+    $$es6$promise$promise$$Promise.reject = $$promise$reject$$default;
+
+    $$es6$promise$promise$$Promise.prototype = {
+      constructor: $$es6$promise$promise$$Promise,
+
+    /**
+      The primary way of interacting with a promise is through its `then` method,
+      which registers callbacks to receive either a promise's eventual value or the
+      reason why the promise cannot be fulfilled.
+
+      ```js
+      findUser().then(function(user){
+        // user is available
+      }, function(reason){
+        // user is unavailable, and you are given the reason why
+      });
+      ```
+
+      Chaining
+      --------
+
+      The return value of `then` is itself a promise.  This second, 'downstream'
+      promise is resolved with the return value of the first promise's fulfillment
+      or rejection handler, or rejected if the handler throws an exception.
+
+      ```js
+      findUser().then(function (user) {
+        return user.name;
+      }, function (reason) {
+        return 'default name';
+      }).then(function (userName) {
+        // If `findUser` fulfilled, `userName` will be the user's name, otherwise it
+        // will be `'default name'`
+      });
+
+      findUser().then(function (user) {
+        throw new Error('Found user, but still unhappy');
+      }, function (reason) {
+        throw new Error('`findUser` rejected and we're unhappy');
+      }).then(function (value) {
+        // never reached
+      }, function (reason) {
+        // if `findUser` fulfilled, `reason` will be 'Found user, but still unhappy'.
+        // If `findUser` rejected, `reason` will be '`findUser` rejected and we're unhappy'.
+      });
+      ```
+      If the downstream promise does not specify a rejection handler, rejection reasons will be propagated further downstream.
+
+      ```js
+      findUser().then(function (user) {
+        throw new PedagogicalException('Upstream error');
+      }).then(function (value) {
+        // never reached
+      }).then(function (value) {
+        // never reached
+      }, function (reason) {
+        // The `PedgagocialException` is propagated all the way down to here
+      });
+      ```
+
+      Assimilation
+      ------------
+
+      Sometimes the value you want to propagate to a downstream promise can only be
+      retrieved asynchronously. This can be achieved by returning a promise in the
+      fulfillment or rejection handler. The downstream promise will then be pending
+      until the returned promise is settled. This is called *assimilation*.
+
+      ```js
+      findUser().then(function (user) {
+        return findCommentsByAuthor(user);
+      }).then(function (comments) {
+        // The user's comments are now available
+      });
+      ```
+
+      If the assimliated promise rejects, then the downstream promise will also reject.
+
+      ```js
+      findUser().then(function (user) {
+        return findCommentsByAuthor(user);
+      }).then(function (comments) {
+        // If `findCommentsByAuthor` fulfills, we'll have the value here
+      }, function (reason) {
+        // If `findCommentsByAuthor` rejects, we'll have the reason here
+      });
+      ```
+
+      Simple Example
+      --------------
+
+      Synchronous Example
+
+      ```javascript
+      var result;
+
+      try {
+        result = findResult();
+        // success
+      } catch(reason) {
+        // failure
+      }
+      ```
+
+      Errback Example
+
+      ```js
+      findResult(function(result, err){
+        if (err) {
+          // failure
+        } else {
+          // success
+        }
+      });
+      ```
+
+      Promise Example;
+
+      ```javascript
+      findResult().then(function(result){
+        // success
+      }, function(reason){
+        // failure
+      });
+      ```
+
+      Advanced Example
+      --------------
+
+      Synchronous Example
+
+      ```javascript
+      var author, books;
+
+      try {
+        author = findAuthor();
+        books  = findBooksByAuthor(author);
+        // success
+      } catch(reason) {
+        // failure
+      }
+      ```
+
+      Errback Example
+
+      ```js
+
+      function foundBooks(books) {
+
+      }
+
+      function failure(reason) {
+
+      }
+
+      findAuthor(function(author, err){
+        if (err) {
+          failure(err);
+          // failure
+        } else {
+          try {
+            findBoooksByAuthor(author, function(books, err) {
+              if (err) {
+                failure(err);
+              } else {
+                try {
+                  foundBooks(books);
+                } catch(reason) {
+                  failure(reason);
+                }
+              }
+            });
+          } catch(error) {
+            failure(err);
+          }
+          // success
+        }
+      });
+      ```
+
+      Promise Example;
+
+      ```javascript
+      findAuthor().
+        then(findBooksByAuthor).
+        then(function(books){
+          // found books
+      }).catch(function(reason){
+        // something went wrong
+      });
+      ```
+
+      @method then
+      @param {Function} onFulfilled
+      @param {Function} onRejected
+      Useful for tooling.
+      @return {Promise}
+    */
+      then: function(onFulfillment, onRejection) {
+        var parent = this;
+        var state = parent._state;
+
+        if (state === $$$internal$$FULFILLED && !onFulfillment || state === $$$internal$$REJECTED && !onRejection) {
+          return this;
+        }
+
+        var child = new this.constructor($$$internal$$noop);
+        var result = parent._result;
+
+        if (state) {
+          var callback = arguments[state - 1];
+          $$asap$$default(function(){
+            $$$internal$$invokeCallback(state, child, callback, result);
+          });
+        } else {
+          $$$internal$$subscribe(parent, child, onFulfillment, onRejection);
+        }
+
+        return child;
+      },
+
+    /**
+      `catch` is simply sugar for `then(undefined, onRejection)` which makes it the same
+      as the catch block of a try/catch statement.
+
+      ```js
+      function findAuthor(){
+        throw new Error('couldn't find that author');
+      }
+
+      // synchronous
+      try {
+        findAuthor();
+      } catch(reason) {
+        // something went wrong
+      }
+
+      // async with promises
+      findAuthor().catch(function(reason){
+        // something went wrong
+      });
+      ```
+
+      @method catch
+      @param {Function} onRejection
+      Useful for tooling.
+      @return {Promise}
+    */
+      'catch': function(onRejection) {
+        return this.then(null, onRejection);
+      }
+    };
+
+    var $$es6$promise$polyfill$$default = function polyfill() {
+      var local;
+
+      if (typeof global !== 'undefined') {
+        local = global;
+      } else if (typeof window !== 'undefined' && window.document) {
+        local = window;
+      } else {
+        local = self;
+      }
+
+      var es6PromiseSupport =
+        "Promise" in local &&
+        // Some of these methods are missing from
+        // Firefox/Chrome experimental implementations
+        "resolve" in local.Promise &&
+        "reject" in local.Promise &&
+        "all" in local.Promise &&
+        "race" in local.Promise &&
+        // Older version of the spec had a resolver object
+        // as the arg rather than a function
+        (function() {
+          var resolve;
+          new local.Promise(function(r) { resolve = r; });
+          return $$utils$$isFunction(resolve);
+        }());
+
+      if (!es6PromiseSupport) {
+        local.Promise = $$es6$promise$promise$$default;
+      }
+    };
+
+    var es6$promise$umd$$ES6Promise = {
+      'Promise': $$es6$promise$promise$$default,
+      'polyfill': $$es6$promise$polyfill$$default
+    };
+
+    /* global define:true module:true window: true */
+    if (typeof define === 'function' && define['amd']) {
+      define(function() { return es6$promise$umd$$ES6Promise; });
+    } else if (typeof module !== 'undefined' && module['exports']) {
+      module['exports'] = es6$promise$umd$$ES6Promise;
+    } else if (typeof this !== 'undefined') {
+      this['ES6Promise'] = es6$promise$umd$$ES6Promise;
+    }
+}).call(this);
\ No newline at end of file
diff --git a/example_arcade.html b/example_arcade.html
new file mode 100644
index 0000000..078eb5c
--- /dev/null
+++ b/example_arcade.html
@@ -0,0 +1,24 @@
+<html>
+  <head>
+    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+    <title>example arcade game</title>
+  </head>
+  <body>
+    <canvas id="canvas" style="width: 50%; height: 50%"></canvas>
+    <script type="text/javascript" src="es6-promise.js"></script>
+    <script type="text/javascript" src="browserfs.js"></script>
+    <script type="text/javascript" src="loader.js"></script>
+    <script type="text/javascript">
+      var emulator = new Emulator(document.querySelector("#canvas"),
+                                  null,
+                                  new JSMAMELoader(JSMAMELoader.driver("1943"),
+                                                   JSMAMELoader.nativeResolution(224, 256),
+                                                   JSMAMELoader.emulatorJS("emulators/mess1943.js"),
+                                                   JSMAMELoader.mountFile("1943.zip",
+                                                                          JSMAMELoader.fetchFile("Game File",
+                                                                                                 "examples/1943.zip"))))
+      emulator.setScale(3);
+      emulator.start({ waitAfterDownloading: true });
+    </script>
+  </body>
+</html>
diff --git a/example_console.html b/example_console.html
new file mode 100644
index 0000000..5f03ceb
--- /dev/null
+++ b/example_console.html
@@ -0,0 +1,27 @@
+<html>
+  <head>
+    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+    <title>example console game</title>
+  </head>
+  <body>
+    <canvas id="canvas" style="width: 50%; height: 50%"/>
+    <script type="text/javascript" src="es6-promise.js"></script>
+    <script type="text/javascript" src="browserfs.js"></script>
+    <script type="text/javascript" src="loader.js"></script>
+    <script type="text/javascript">
+      var emulator = new Emulator(document.querySelector("#canvas"),
+                                  null,
+                                  new JSMESSLoader(JSMESSLoader.driver("a2600"),
+                                                   JSMESSLoader.nativeResolution(352, 223),
+                                                   JSMESSLoader.emulatorJS("emulators/messa2600.js"),
+                                                   JSMESSLoader.mountFile("Pitfall_Activision_1982.bin",
+                                                                          JSMESSLoader.fetchFile("Game File",
+                                                                                                 "examples/Pitfall_Activision_1982.bin")),
+                                                   JSMESSLoader.mountFile("a2600.cfg",
+                                                                          JSMESSLoader.fetchFile("Config File",
+                                                                                                 "examples/a2600.cfg")),
+                                                   JSMESSLoader.peripheral("cart", "Pitfall_Activision_1982.bin")))
+      emulator.setScale(3).start({ waitAfterDownloading: true });
+    </script>
+  </body>
+</html>
diff --git a/example_dosbox.html b/example_dosbox.html
new file mode 100644
index 0000000..8eeb261
--- /dev/null
+++ b/example_dosbox.html
@@ -0,0 +1,23 @@
+<html>
+  <head>
+    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+    <title>example dos game</title>
+  </head>
+  <body>
+    <canvas id="canvas" style="width: 50%; height: 50%"/>
+    <script type="text/javascript" src="es6-promise.js"></script>
+    <script type="text/javascript" src="browserfs.js"></script>
+    <script type="text/javascript" src="loader.js"></script>
+    <script type="text/javascript">
+      var emulator = new Emulator(document.querySelector("#canvas"),
+                                  null,
+                                  new DosBoxLoader(DosBoxLoader.emulatorJS("emulators/dosbox.js"),
+                                                   DosBoxLoader.nativeResolution(640, 400),
+                                                   DosBoxLoader.mountZip("c",
+                                                                         DosBoxLoader.fetchFile("Game File",
+                                                                                                "examples/Zzt_1991_Epic_Megagames_Inc.zip")),
+                                                   DosBoxLoader.startExe("zzt.exe")))
+      emulator.start({ waitAfterDownloading: true });
+    </script>
+  </body>
+</html>
diff --git a/jsmess-launcher.js b/jsmess-launcher.js
deleted file mode 100644
index 0e76982..0000000
--- a/jsmess-launcher.js
+++ /dev/null
@@ -1,170 +0,0 @@
-var ar = new Array(33,34,35,36,37,38,39,40);
-
-function getfullscreenenabler() {
-    return canvas.webkitRequestFullScreen || canvas.mozRequestFullScreen || canvas.requestFullScreen;
-}
-
-function isfullscreensupported() {
-   return !!(getfullscreenenabler());
-}
-
-function gofullscreen() {
-  Module.requestFullScreen(1,0);
-}
-
-function keypress(e) {
-     if (typeof(loader_game)=='object'  &&  !loader_game.started)
-         return true; // Don't ignore certain keys yet (until game started by "click to play")
-  
-     var key = e.which;
-     if($.inArray(key,ar) > -1) {
-         e.preventDefault(); //Don't let arrow, pg up/down, home, end affect page position
-         return false;
-     }
-     return true;
-}
-
-window.onkeydown = keypress;
-
-(function() {
-  function get(name) {
-    if(typeof(loader_game)=='object')
-      return loader_game[name]; //alternate case where dont have CGI args to parse...
-    if(name=(new RegExp('[?&]'+encodeURIComponent(name)+'=([^&]*)')).exec(location.search)) {
-      return decodeURIComponent(name[1]);
-    }
-  }
-
-  var games;
-  var mess;
-  var module;
-
-  function getmodule() {
-    module = get('module');
-    module = module ? module : 'test';
-  }
-
-  function init() {
-    getmodule();
-    ready();
-  }
-
-  function ready() {
-    var fullscreenbutton = document.getElementById('gofullscreen')
-    if (fullscreenbutton) {
-      if (isfullscreensupported()) {
-        fullscreenbutton.addEventListener('click', gofullscreen);
-        if ('onfullscreenchange' in document) {
-          document.addEventListener('fullscreenchange', JSMESS.fullScreenChangeHandler);
-        } else if ('onmozfullscreenchange' in document) {
-          document.addEventListener('mozfullscreenchange', JSMESS.fullScreenChangeHandler);
-        } else if ('onwebkitfullscreenchange' in document) {
-          document.addEventListener('webkitfullscreenchange', JSMESS.fullScreenChangeHandler);
-        }
-      } else {
-        fullscreenbutton.disabled = true;
-      }
-    }
-    var canvas = document.getElementById('canvas');
-    mess = new JSMESS(canvas)
-      .setscale(get('scale') ? parseFloat(get('scale')) : 1)
-      .setmodule(module)
-    setgame(loader_game);
-    if (get('autostart')) {
-      mess.start();
-    }
-    // Gamepad text
-    if (detectgamepadsupport()) {
-      var gamepadDiv = document.getElementById('gamepadtext');
-      gamepadDiv.innerHTML = "No gamepads detected. Press a button on a gamepad to use it.";
-      listenforgamepads(function(gamepads, newgamepad) {
-        var s = (gamepads.length === 1 ? '' : 's');
-        gamepadDiv.innerHTML = gamepads.length + ' gamepad'+s+' detected. If the game does not ' +
-                               'respond to your gamepad'+s+', refresh the browser and try again.';
-        if (mess.hasStarted) {
-          gamepadDiv.innerHTML += "<br />Restart MESS to use new gamepads.";
-        }
-      });
-    }
-  }
-
-  function setgame(game) {
-    game = (game == 'NONE') ? undefined : game;
-    // NOTE: deliberately use cors.archive.org since this will 302 rewrite to iaXXXXX.us.archive.org/XX/items/...
-    // and need to keep that "artificial" extra domain-ish name to avoid CORS issues with IE/Safari
-    mess.setgame(game ? '//cors.archive.org/cors/'+ game : undefined);
-  }
-
-  function switchgame(e) {
-    setgame(e.target.value);
-  }
-
-  // Firefox will not give us Joystick data unless we register this NOP
-  // callback.
-  // https://bugzilla.mozilla.org/show_bug.cgi?id=936104
-  addEventListener("gamepadconnected", function() {});
-  var getgamepads = navigator.getGamepads || navigator.webkitGamepads ||
-    navigator.mozGamepads || navigator.gamepads || navigator.webkitGetGamepads;
-  /**
-   * Does the current browser support the Gamepad API?
-   * Returns a boolean.
-   */
-  function detectgamepadsupport() {
-    return typeof getgamepads === 'function';
-  }
-  // The timer that listens for gamepads, in case we ever want to stop it.
-  var gamepadlistener;
-  /**
-   * Listens for new gamepads, and triggers the callback when it detects a
-   * change.
-   * The callback is passed an array of active gamepads.
-   */
-  function listenforgamepads(cb, freq) {
-    // NOP if the browser doesn't support gamepads.
-    if (!detectgamepadsupport()) return;
-    // Map from gamepad id to gamepad information.
-    var prevgamepads = {};
-    // DEFAULT: Check gamepads every second.
-    if (typeof freq === 'undefined') freq = 1000;
-    gamepadlistener = setInterval(function() {
-      // Browsers get cranky when you don't apply this on the navigator object.
-      var gamepads = getgamepads.apply(navigator);
-      var currentgamepads = {};
-      var i;
-      var hasChanged = false;
-      for (i = 0; i < gamepads.length; i++) {
-        var gamepad = gamepads[i];
-        if (gamepad != null) {
-          currentgamepads[gamepad.id] = gamepad;
-          if (!prevgamepads.hasOwnProperty(gamepad.id)) {
-            // Gamepad has been added.
-            hasChanged = true;
-          }
-        }
-      }
-
-      // Has a gamepad been removed?
-      if (!hasChanged) {
-        for (var gamepadid in prevgamepads) {
-          if (!currentgamepads.hasOwnProperty(gamepadid)) {
-            hasChanged = true;
-          }
-        }
-      }
-
-      prevgamepads = currentgamepads;
-
-      if (hasChanged) {
-        // Actual gamepads, filtered from gamepads. Chrome puts empty items into
-        // its gamepadlist.
-        var actualgamepads = [];
-        for (i = 0; i < gamepads.length; i++) {
-          if (gamepads[i] != null) actualgamepads.push(gamepads[i]);
-        }
-        cb(actualgamepads);
-      }
-    }, freq);
-  }
-
-  window.addEventListener('load', init);
-})();
diff --git a/jsmess-loader.js b/jsmess-loader.js
deleted file mode 100644
index 7a0ef1b..0000000
--- a/jsmess-loader.js
+++ /dev/null
@@ -1,404 +0,0 @@
-var Module = null;
-
-function JSMESS(canvas, module, game, precallback, callback, scale) {
-  var js_data;
-  var moduledata;
-  var requests = [];
-  var drawloadingtimer;
-  var file_countdown;
-  var spinnerrot = 0;
-  var splashimg = new Image();
-  var spinnerimg = new Image();
-  var has_started = false;
-  var loading = false;
-  var LOADING_TEXT;
-  var splash_inverse = getComputedStyle(document.getElementsByTagName("body")[0]).backgroundColor === 'rgb(0, 0, 0)';
-
-  var SAMPLE_RATE = (function () {
-    var audio_ctx = window.AudioContext || window.webkitAudioContext || false;
-    if (!audio_ctx) {
-      return false;
-    }
-    var sample = new audio_ctx;
-    return sample.sampleRate.toString();
-  }());
-
-  // right off the bat we set the canvas's inner dimensions to
-  // whatever it's current css dimensions are; this isn't likely to be
-  // the same size that dosbox/jsmess will set it to, but it avoids
-  // the case where the size was left at the default 300x150
-  if (!canvas.hasAttribute("width")) {
-    canvas.width = parseInt(getComputedStyle(canvas).width, 10);
-    canvas.height = parseInt(getComputedStyle(canvas).height, 10);
-  }
-
-  var can_start = function () {
-    return !!canvas && !!module && !!game && !!scale && !has_started
-  };
-
-  this.setscale = function(_scale) {
-    scale = _scale;
-    try_start();
-    return this;
-  }
-
-  this.setprecallback = function(_precallback) {
-    precallback = _precallback;
-    return this;
-  }
-
-  this.setcallback = function(_callback) {
-    callback = _callback;
-    return this;
-  }
-
-  this.setmodule = function(_module) {
-    module = _module;
-    try_start();
-    return this;
-  }
-
-  this.setgame = function(_game) {
-    game = _game;
-    try_start();
-    return this;
-  }
-
-  var draw_loading_status = function() {
-    var context = canvas.getContext('2d');
-    context.clearRect(0, 0, canvas.width, canvas.height);
-    context.drawImage(splashimg, canvas.width / 2 - (splashimg.width / 2), canvas.height / 3 - (splashimg.height / 2));
-    var spinnerpos = (canvas.height / 2 + splashimg.height / 2) + 16;
-    context.save();
-    context.translate((canvas.width / 2), spinnerpos);
-    context.rotate(spinnerrot);
-    context.drawImage(spinnerimg, -(64/2), -(64/2), 64, 64);
-    context.restore();
-    context.save();
-    context.font = '18px sans-serif';
-    context.fillStyle = splash_inverse ? 'white' : 'black';
-    context.textAlign = 'center';
-    context.fillText(LOADING_TEXT, canvas.width / 2, (canvas.height / 2) + (splashimg.height / 4));
-    context.restore();
-    spinnerrot += .25;
-  };
-
-  var progress_fetch_file = function(e) {
-    if (e.lengthComputable) {
-      e.target.progress = e.loaded / e.total;
-      e.target.loaded = e.loaded;
-      e.target.total = e.total;
-      e.target.lengthComputable = e.lengthComputable;
-    }
-  };
-
-  var fetch_file = function(title, url, cb, rt, raw, unmanaged) {
-    var xhr = new XMLHttpRequest();
-    xhr.open('GET', url, true);
-    xhr.responseType = rt ? rt : 'arraybuffer';
-    xhr.onload = function(e) {
-      if (xhr.status != 200) {
-        return;
-      }
-      if (!unmanaged) {
-        xhr.progress = 1.0;
-      }
-      var ints = raw ? xhr.response :  new Int8Array(xhr.response);
-      cb(ints);
-    };
-    if (!unmanaged) {
-      xhr.onprogress = progress_fetch_file;
-      xhr.title = title;
-      xhr.progress = 0;
-      xhr.total = 0;
-      xhr.loaded = 0;
-      xhr.lengthComputable = false;
-      requests.push(xhr);
-    }
-    xhr.send();
-  };
-
-  var update_countdown = function() {
-    file_countdown -= 1
-    if (file_countdown <= 0) {
-      loading = false;
-      var headID = document.getElementsByTagName('head')[0];
-      var newScript = document.createElement('script');
-      newScript.type = 'text/javascript';
-      newScript.text = js_data;
-      headID.appendChild(newScript);
-
-      // see archive.js for the mute/unmute button/JS
-      if (!($.cookie  &&  $.cookie('unmute'))){
-        setTimeout(function(){
-          // someone moved it from 1st to 2nd!
-          if (JSMESS  &&  typeof(JSMESS.sdl_pauseaudio)!='undefined')
-            JSMESS.sdl_pauseaudio(1);
-          else if (_SDL_PauseAudio)
-            _SDL_PauseAudio(1);
-          
-        }, 3000); 
-      }
-    }
-  };
-
-  var build_mess_arguments = function (config) {
-    LOADING_TEXT = 'Building arguments';
-    var nr = config['native_resolution'];
-    // see archive.js for the mute/unmute button/JS
-    var muted = (!(typeof($.cookie)!='undefined'  &&  $.cookie('unmute')));    
-
-    var args = [
-      config['driver'],
-      '-verbose',
-      '-rompath','.',
-      '-window',
-      '-resolution', nr[0]+'x' + nr[1],
-      '-nokeepaspect'
-    ];
-
-    if (config.autoboot) {
-      args.push('-autoboot_command');
-    }
-
-    if (muted){
-      args.push('-sound', 'none');
-    } else if (SAMPLE_RATE) {
-      args.push('-samplerate', SAMPLE_RATE);
-    }
-    
-    if (game) {
-      args.push('-' + config['peripherals'][0], game.replace(/\//g,'_'))
-    }
-
-    if (config['extra_args']) {
-      args = args.concat(config['extra_args'])
-    }
-
-    return args
-  };
-
-  var build_mame_arguments = function (config) {
-    LOADING_TEXT = 'Building arguments';
-    var nr = config['native_resolution'];
-    // see archive.js for the mute/unmute button/JS
-    var muted = (!(typeof($.cookie)!='undefined'  &&  $.cookie('unmute')));    
-
-    var args = [
-      config['driver'],
-      '-verbose',
-      '-rompath','.',
-      '-window',
-      '-resolution', nr[0]+'x' + nr[1],
-      '-nokeepaspect'
-    ];
-
-    if (muted){
-      args.push('-sound', 'none');
-    } else if (SAMPLE_RATE) {
-      args.push('-samplerate', SAMPLE_RATE);
-    }
-
-    if (config['extra_args']) {
-      args = args.concat(config['extra_args'])
-    }
-
-    return args
-  };
-  
-  get_game_name = function (game_path) {
-    return game_path.split('/').pop();
-  };
-
-  var init_module = function() {
-    LOADING_TEXT = 'Parsing config';
-    var modulecfg = JSON.parse(moduledata);
-
-    var game_file = null;
-    var keymap    = null;
-    var bios_filenames = modulecfg['bios_filenames'];
-    var bios_files = {};
-
-    var nr = modulecfg['native_resolution'];
-
-    JSMESS.width = nr[0] * scale;
-    JSMESS.height = nr[1] * scale;
-
-    var use_mame = parseInt(modulecfg['arcade'], 10);
-    var arguments;
-
-    if (use_mame) {
-      arguments = build_mame_arguments(modulecfg);
-    } else {
-      arguments = build_mess_arguments(modulecfg);
-    }
-
-    Module = {
-      arguments: arguments,
-      screenIsReadOnly: true,
-      print: (function() {
-        return function(text) {
-          console.log(text);
-        };
-      })(),
-      canvas: canvas,
-      noInitialRun: false,
-      preInit: function() {
-        LOADING_TEXT = 'Loading binary files into file system';
-        // Load the downloaded binary files into the filesystem.
-        for (var bios_fname in bios_files) {
-          if (bios_files.hasOwnProperty(bios_fname)) {
-            Module['FS_createDataFile']('/', bios_fname, bios_files[bios_fname], true, true);
-          }
-        }
-        if (game && !use_mame) {
-            LOADING_TEXT = 'Loading game file into file system';
-            Module['FS_createDataFile']('/', game.replace(/\//g,'_'), game_file, true, true);
-        }
-        Module['FS_createFolder']('/', 'cfg', true, true);
-        Module['FS_createDataFile']('/cfg', modulecfg['driver'] + '.cfg', keymap, true, true);
-        window.clearInterval(drawloadingtimer);        
-        if (callback) {
-          modulecfg.canvas = canvas;
-          window.setTimeout(function() {callback(modulecfg)}, 0);
-        }
-      }
-    };
-
-    bios_filenames = bios_filenames.filter(String);
-    file_countdown = bios_filenames.length + (game ? 1 : 0) + 2
-
-    // Fetch the BIOS and the game we want to run.
-    LOADING_TEXT = 'Fetching BIOS and Game';
-    if (!use_mame) {
-      for (var i=0; i < bios_filenames.length; i++) {
-        var fname = bios_filenames[i];
-        // NOTE: deliberately use cors.archive.org since this will 302 rewrite to iaXXXXX.us.archive.org/XX/items/...
-        // and need to keep that "artificial" extra domain-ish name to avoid CORS issues with IE/Safari
-        fetch_file('Bios', '//cors.archive.org/cors/jsmess_bios_v2/' + fname, function(data) { bios_files[fname] = data; update_countdown(); });
-      }
-    } else {
-      fetch_file('Bios', game, function (data) { bios_files[get_game_name(game)] = data; update_countdown(); });
-    }
-
-    if (game && !use_mame) {
-      fetch_file('Game', game, function(data) { game_file = data; update_countdown(); });
-    }
-
-    // NOTE: deliberately use cors.archive.org since this will 302 rewrite to iaXXXXX.us.archive.org/XX/items/...
-    // and need to keep that "artificial" extra domain-ish name to avoid CORS issues with IE/Safari
-    fetch_file('Keymap', '//cors.archive.org/cors/jsmess_config_v2/' + modulecfg['driver'] + '.cfg', function(data) { keymap = data; update_countdown(); }, 'text', true, true);
-    fetch_file('Javascript', '//cors.archive.org/cors/jsmess_engine_v2/' + modulecfg['js_filename'], function(data) { js_data = data; update_countdown(); }, 'text', true);
-    
-  };
-
-  var keyevent = function(e) {
-    if (typeof(loader_game)=='object') return; // game will start with click-to-play instead of [SPACE] char
-    if (e.which == 32) {
-      e.preventDefault();
-      start();
-    }
-  }
-
-  var start = function() {
-    window.removeEventListener('keypress', keyevent);
-    canvas.removeEventListener('click', start);
-    loading = true;
-    drawloadingtimer = window.setInterval(draw_loading_status, 1000/60);
-    if (precallback) {
-      window.setTimeout(function() {precallback()}, 0);
-    }
-    init_module();
-    return this;
-  }
-  this.start = start;
-  window.JSMESSstart = start;//global hook to method (so can be invoked with a "click to play" image being clicked)
-
-  var drawsplash = function() {
-    var context = canvas.getContext('2d');   
-    splashimg.onload = function(){
-      context.clearRect(0, 0, canvas.width, canvas.height);
-      context.save();
-      context.drawImage(splashimg, canvas.width / 2 - (splashimg.width / 2), canvas.height / 3 - (splashimg.height / 2));
-      context.font = '18px sans-serif';
-      context.fillStyle = splash_inverse ? 'white' : 'black';
-      context.textAlign = 'center';
-      context.fillText('Click here to start', canvas.width / 2, (canvas.height / 2) + (splashimg.height / 2));
-      context.textAlign = 'start';
-      context.restore();
-    };
-    spinnerimg.onload = function() {
-      var use_mame = parseInt(JSON.parse(moduledata).arcade, 10);
-      var src;
-      if (use_mame) {
-        src = '/images/mame.png';
-      } else {
-        src = '/images/mess.png';
-      }
-      splashimg.src = src;
-    }
-    spinnerimg.src = '/images/spinner.png';
-  }
-
-  var configLoaded = function (data) {
-    moduledata = data;
-    window.addEventListener('keypress', keyevent);
-    canvas.addEventListener('click', start);
-    drawsplash();
-  };
-
-  function try_start () {
-    if (!can_start()) {
-      return;
-    }
-    has_started = true;
-    // NOTE: deliberately use cors.archive.org since this will 302 rewrite to iaXXXXX.us.archive.org/XX/items/jsmess_engine_v2/...json
-    // and need to keep that "artificial" extra domain-ish name to avoid CORS issues with IE/Safari
-    fetch_file('ModuleInfo', '//cors.archive.org/cors/jsmess_engine_v2/' + module + '.json', configLoaded, 'text', true, true);
-  }
-
-  try_start();
-}
-
-JSMESS._readySet = false;
-
-JSMESS._readyList = [];
-
-JSMESS._runReadies = function() {
-  if (JSMESS._readyList) {
-    for (var r=0; r < JSMESS._readyList.length; r++) {
-      JSMESS._readyList[r].call(window, []);
-    };
-    JSMESS._readyList = [];
-  };
-};
-
-JSMESS._readyCheck = function() {
-  if (JSMESS.running) {
-    JSMESS._runReadies();
-  } else {
-    JSMESS._readySet = setTimeout(JSMESS._readyCheck, 10);
-  };
-};
-
-JSMESS.ready = function(r) {
-  if (JSMESS.running) {
-    r.call(window, []);
-  } else {
-    JSMESS._readyList.push(function() { canvas.style.width = JSMESS.width + 'px'; canvas.style.height = JSMESS.height + 'px'; } );
-    if (!(JSMESS._readySet)) {
-      JSMESS._readyCheck();
-    }
-  };
-}
-
-JSMESS.setScale = function() {
-  Module.canvas.style.width = JSMESS.width + 'px';
-  Module.canvas.style.height = JSMESS.height + 'px';
-};
-
-JSMESS.fullScreenChangeHandler = function() {
-  if (!(document.mozFullScreenElement || document.fullScreenElement)) {
-      setTimeout(JSMESS.setScale, 0);
-  }
-}
diff --git a/loader.js b/loader.js
new file mode 100644
index 0000000..f35caa7
--- /dev/null
+++ b/loader.js
@@ -0,0 +1,1179 @@
+var Module = null;
+
+(function (Promise) {
+   function IALoader(canvas, game, callback, scale, splashimg) {
+     if (typeof game !== 'string') {
+       game = game.toString();
+     }
+
+     var SAMPLE_RATE = (function () {
+                          var audio_ctx = window.AudioContext || window.webkitAudioContext || false;
+                          if (!audio_ctx) {
+                            return false;
+                          }
+                          var sample = new audio_ctx;
+                          return sample.sampleRate.toString();
+                        }());
+
+     var metadata, module, modulecfg, config_args,
+         emulator = new Emulator(canvas).setScale(scale)
+                                        .setSplashImage(splashimg)
+                                        .setLoad(loadFiles)
+                                        .setcallback(callback);
+     var cfgr;
+     function loadFiles(fetch_file, splash) {
+       splash.loading_text = 'Downloading game metadata...';
+       return new Promise(function (resolve, reject) {
+                            var loading = fetch_file('Game Metadata',
+                                                     get_meta_url(game),
+                                                     'document');
+                            loading.then(function (data) {
+                                           metadata = data;
+                                           splash.loading_text = 'Downloading emulator metadata...';
+                                           module = metadata.getElementsByTagName("emulator")
+                                                            .item(0)
+                                                            .textContent;
+                                           return fetch_file('Emulator Metadata',
+                                                             get_emulator_config_url(module),
+                                                             'text', true);
+                                         },
+                                         function () {
+                                           splash.loading_text = 'Failed to download metadata!';
+                                           splash.failed_loading = true;
+                                           reject(1);
+                                         })
+                                   .then(function (data) {
+                                           modulecfg = JSON.parse(data);
+                                           var mame = 'arcade' in modulecfg && parseInt(modulecfg['arcade'], 10);
+                                           var get_files;
+
+                                           if (module && module.indexOf("dosbox") === 0) {
+                                             cfgr = DosBoxLoader;
+                                             get_files = get_dosbox_files;
+                                           }
+                                           else if (module) {
+                                             if (mame) {
+                                               cfgr = JSMAMELoader;
+                                               get_files = get_mame_files;
+                                             } else {
+                                               cfgr = JSMESSLoader;
+                                               get_files = get_mess_files;
+                                             }
+                                           }
+                                           else {
+                                             throw new Error("Unknown module type "+ module +"; cannot configure the emulator.");
+                                           }
+
+                                           var nr = modulecfg['native_resolution'];
+                                           config_args = [cfgr.emulatorJS(get_js_url(modulecfg.js_filename)),
+                                                          cfgr.locateAdditionalEmulatorJS(locateAdditionalJS),
+                                                          cfgr.nativeResolution(nr[0], nr[1]),
+                                                          cfgr.aspectRatio(nr[0] / nr[1]),
+                                                          cfgr.sampleRate(SAMPLE_RATE),
+                                                          cfgr.muted(!($.cookie && $.cookie('unmute')))];
+
+                                           if (module && module.indexOf("dosbox") === 0) {
+                                               config_args.push(cfgr.startExe(metadata.getElementsByTagName("emulator_start")
+                                                                                      .item(0)
+                                                                                      .textContent));
+                                           } else if (module) {
+                                             config_args.push(cfgr.driver(modulecfg.driver),
+                                                              cfgr.extraArgs(modulecfg.extra_args));
+                                             if (modulecfg.peripherals && modulecfg.peripherals[0]) {
+                                               config_args.push(cfgr.peripheral(modulecfg.peripherals[0],
+                                                                                get_game_name(game)));
+                                             }
+                                           }
+
+                                           splash.loading_text = 'Downloading game data...';
+                                           return Promise.all(get_files(cfgr, metadata, modulecfg));
+                                         },
+                                         function () {
+                                           splash.loading_text = 'Failed to download metadata!';
+                                           splash.failed_loading = true;
+                                           reject(2);
+                                         })
+                                   .then(function (game_files) {
+                                           resolve(cfgr.apply(null, extend(config_args, game_files)));
+                                         },
+                                         function () {
+                                           splash.loading_text = 'Failed to download game data!';
+                                           splash.failed_loading = true;
+                                           reject(3);
+                                         });
+                          });
+     }
+
+     function locateAdditionalJS(filename) {
+       if ("file_locations" in modulecfg && filename in modulecfg.file_locations) {
+         return get_js_url(modulecfg.file_locations[filename]);
+       }
+       throw new Error("Don't know how to find file: "+ filename);
+     }
+
+     function get_dosbox_files(cfgr, emulator, modulecfg) {
+       // first get the urls
+       var urls = [], files = [];
+       var len = metadata.documentElement.childNodes.length, i;
+       for (i = 0; i < len; i++) {
+         var node = metadata.documentElement.childNodes[i];
+         var m = node.nodeName.match(/^dosbox_drive_[a-zA-Z]$/);
+         if (m) {
+           urls.push(node);
+         }
+       }
+
+       // and a count, then fetch them in
+       var len = urls.length;
+       for (i = 0; i < len; i++) {
+         var node = urls[i],
+             drive = node.nodeName.split('_')[2],
+             title = 'Game File ('+ (i+1) +' of '+ (game ? len+1 : len) +')',
+             url = get_zip_url(node.textContent);
+         files.push(cfgr.mountZip(drive, cfgr.fetchFile(title, url)));
+       }
+
+       if (game) {
+         var drive = 'c',
+             title = 'Game File ('+ (i+1) +' of '+ (game ? len+1 : len) +')',
+             url = get_zip_url(game);
+         files.push(cfgr.mountZip(drive, cfgr.fetchFile(title, url)));
+       }
+
+       return files;
+     }
+
+     function get_mess_files(cfgr, metadata, modulecfg) {
+       var files = [],
+           bios_files = modulecfg['bios_filenames'];
+       bios_files.forEach(function (fname, i) {
+                            if (fname) {
+                              var title = "Bios File ("+ (i+1) +" of "+ bios_files.length +")";
+                              files.push(cfgr.mountFile('/'+ fname,
+                                                        cfgr.fetchFile(title,
+                                                                       get_bios_url(fname))));
+                            }
+                          });
+       files.push(cfgr.mountFile('/'+ get_game_name(game),
+                                 cfgr.fetchFile("Game File",
+                                                get_zip_url(game))));
+       files.push(cfgr.mountFile('/'+ modulecfg['driver'] + '.cfg',
+                                 cfgr.fetchOptionalFile("CFG File",
+                                                        get_other_emulator_config_url(module))));
+       return files;
+     }
+
+     function get_mame_files(cfgr, metadata, modulecfg) {
+       var files = [],
+           bios_files = modulecfg['bios_filenames'];
+       bios_files.forEach(function (fname, i) {
+                            if (fname) {
+                              var title = "Bios File ("+ (i+1) +" of "+ bios_files.length +")";
+                              files.push(cfgr.mountFile('/'+ fname,
+                                                        cfgr.fetchFile(title,
+                                                                       get_bios_url(fname))));
+                            }
+                          });
+       files.push(cfgr.mountFile('/'+ get_game_name(game),
+                                 cfgr.fetchFile("Game File",
+                                                get_zip_url(game))));
+       files.push(cfgr.mountFile('/'+ modulecfg['driver'] + '.cfg',
+                                 cfgr.fetchOptionalFile("CFG File",
+                                                        get_other_emulator_config_url(module))));
+       return files;
+     }
+
+     var get_item_name = function (game_path) {
+       return game_path.split('/').shift();
+     };
+
+     var get_game_name = function (game_path) {
+       return game_path.split('/').pop();
+     };
+
+     // NOTE: deliberately use cors.archive.org since this will 302 rewrite to iaXXXXX.us.archive.org/XX/items/...
+     // and need to keep that "artificial" extra domain-ish name to avoid CORS issues with IE/Safari
+     var get_emulator_config_url = function (module) {
+       return '//archive.org/cors/jsmess_engine_v2/' + module + '.json';
+     };
+
+     var get_other_emulator_config_url = function (module) {
+       return '//archive.org/cors/jsmess_config_v2/' + module + '.cfg';
+     };
+
+     var get_meta_url = function (game_path) {
+       var path = game_path.split('/');
+       return "//cors.archive.org/cors/"+ path[0] +"/"+ path[0] +"_meta.xml";
+     };
+
+     var get_zip_url = function (game_path) {
+       return "//cors.archive.org/cors/"+ game_path;
+     };
+
+     var get_js_url = function (js_filename) {
+       return "//cors.archive.org/cors/jsmess_engine_v2/"+ js_filename;
+     };
+
+     var get_bios_url = function (bios_filename) {
+       return "//cors.archive.org/cors/jsmess_bios_v2/"+ bios_filename;
+     };
+
+     function mountat (drive) {
+       return function (data) {
+         return { drive: drive,
+                  mountpoint: "/" + drive,
+                  data: data
+                };
+       };
+     }
+
+     return emulator;
+   }
+
+   function BaseLoader() {
+     return Array.prototype.reduce.call(arguments, extend);
+   }
+
+   BaseLoader.canvas = function (id) {
+     var elem = id instanceof Element ? id : document.getElementById(id);
+     return { canvas: elem };
+   };
+
+   BaseLoader.emulatorJS = function (url) {
+     return { emulatorJS: url };
+   };
+
+   BaseLoader.locateAdditionalEmulatorJS = function (func) {
+     return { locateAdditionalJS: func };
+   };
+
+   BaseLoader.nativeResolution = function (width, height) {
+     if (typeof width !== 'number' || typeof height !== 'number')
+       throw new Error("Width and height must be numbers");
+     return { nativeResolution: { width: Math.floor(width), height: Math.floor(height) } };
+   };
+
+   BaseLoader.aspectRatio = function (ratio) {
+     if (typeof ratio !== 'number')
+       throw new Error("Aspect ratio must be a number");
+     return { aspectRatio: ratio };
+   };
+
+   BaseLoader.sampleRate = function (rate) {
+     return { sample_rate: rate };
+   };
+
+   BaseLoader.muted = function (muted) {
+     return { muted: muted };
+   };
+
+   BaseLoader.mountZip = function (drive, file) {
+     return { files: [{ drive: drive,
+                        mountpoint: "/" + drive,
+                        file: file
+                      }] };
+   };
+
+   BaseLoader.mountFile = function (filename, file) {
+     return { files: [{ mountpoint: filename,
+                        file: file
+                      }] };
+   };
+
+   BaseLoader.fetchFile = function (title, url) {
+     return { title: title, url: url };
+   };
+
+   BaseLoader.fetchOptionalFile = function (title, url) {
+     return { title: title, url: url, optional: true };
+   };
+
+   BaseLoader.localFile = function (title, data) {
+     return { title: title, data: data };
+   };
+
+   function DosBoxLoader() {
+     var config = Array.prototype.reduce.call(arguments, extend);
+     config.emulator_arguments = build_dosbox_arguments(config.emulatorStart, config.files);
+     return config;
+   }
+   DosBoxLoader.__proto__ = BaseLoader;
+
+   DosBoxLoader.startExe = function (path) {
+     return { emulatorStart: path };
+   };
+
+   function JSMESSLoader() {
+     var config = Array.prototype.reduce.call(arguments, extend);
+     config.emulator_arguments = build_mess_arguments(config.muted, config.mess_driver,
+                                                      config.nativeResolution, config.sample_rate,
+                                                      config.peripheral, config.extra_mess_args);
+     config.needs_jsmess_webaudio = true;
+     return config;
+   }
+   JSMESSLoader.__proto__ = BaseLoader;
+
+   JSMESSLoader.driver = function (driver) {
+     return { mess_driver: driver };
+   };
+
+   JSMESSLoader.peripheral = function (peripheral, game) {
+     return { peripheral: [peripheral, game] };
+   };
+
+   JSMESSLoader.extraArgs = function (args) {
+     return { extra_mess_args: args };
+   };
+
+   function JSMAMELoader() {
+     var config = Array.prototype.reduce.call(arguments, extend);
+     config.emulator_arguments = build_mame_arguments(config.muted, config.mess_driver,
+                                                      config.nativeResolution, config.sample_rate,
+                                                      config.extra_mess_args);
+     config.needs_jsmess_webaudio = true;
+     return config;
+   }
+   JSMAMELoader.__proto__ = BaseLoader;
+
+   JSMAMELoader.driver = function (driver) {
+     return { mess_driver: driver };
+   };
+
+   JSMAMELoader.extraArgs = function (args) {
+     return { extra_mess_args: args };
+   };
+
+   var build_mess_arguments = function (muted, driver, native_resolution, sample_rate, peripheral, extra_args) {
+     var args = [driver,
+                 '-verbose',
+                 '-rompath', 'emulator',
+                 '-window',
+                 '-nokeepaspect'];
+
+     if (native_resolution && "width" in native_resolution && "height" in native_resolution) {
+       args.push('-resolution', [native_resolution.width, native_resolution.height].join('x'));
+     }
+
+     if (muted) {
+       args.push('-sound', 'none');
+     } else if (sample_rate) {
+       args.push('-samplerate', sample_rate);
+     }
+
+     if (peripheral && peripheral[0]) {
+       args.push('-' + peripheral[0],
+                 '/emulator/'+ (peripheral[1].replace(/\//g,'_')));
+     }
+
+     if (extra_args) {
+       args = args.concat(extra_args);
+     }
+
+     return args;
+   };
+
+   var build_mame_arguments = function (muted, driver, native_resolution, sample_rate, extra_args) {
+     var args = [driver,
+                 '-verbose',
+                 '-rompath', 'emulator',
+                 '-window',
+                 '-nokeepaspect'];
+
+     if (native_resolution && "width" in native_resolution && "height" in native_resolution) {
+       args.push('-resolution', [native_resolution.width, native_resolution.height].join('x'));
+     }
+
+     if (muted) {
+       args.push('-sound', 'none');
+     } else if (sample_rate) {
+       args.push('-samplerate', sample_rate);
+     }
+
+     if (extra_args) {
+       args = args.concat(extra_args);
+     }
+
+     return args;
+   };
+
+    var build_dosbox_arguments = function (emulator_start, files) {
+      var args = ['-conf', '/emulator/dosbox.conf'];
+
+      var len = files.length;
+      for (var i = 0; i < len; i++) {
+        if ('mountpoint' in files[i]) {
+          args.push('-c', 'mount '+ files[i].drive +' /emulator'+ files[i].mountpoint);
+        }
+      }
+
+      var path = emulator_start.split(/\\|\//); // I have LTS already
+      args.push('-c', /^[a-zA-Z]:$/.test(path[0]) ? path.shift() : 'c:');
+      var prog = path.pop();
+      if (path && path.length)
+        args.push('-c', 'cd '+ path.join('/'));
+      args.push('-c', prog);
+
+      return args;
+    };
+
+   function Emulator(canvas, callback, loadFiles) {
+     var js_url;
+     var requests = [];
+     var drawloadingtimer;
+     var splashimg = new Image();
+     var spinnerimg = new Image();
+     spinnerimg.src = '/images/spinner.png';
+     // TODO: Have an enum value that communicates the current state of the emulator, e.g. 'initializing', 'loading', 'running'.
+     var has_started = false;
+     var loading = false;
+     var splash = { loading_text: "",
+                    spinning: true,
+                    spinner_rotation: 0,
+                    finished_loading: false,
+                    colors: { foreground: 'white',
+                              background: 'black' } };
+
+     var SDL_PauseAudio;
+     this.mute = function (state) {
+       try {
+         if (!SDL_PauseAudio)
+           SDL_PauseAudio = Module.cwrap('SDL_PauseAudio', '', ['number']);
+         SDL_PauseAudio(state);
+       } catch (x) {
+         console.log("Unable to change audio state:", x);
+       }
+       return this;
+     };
+
+     var css_resolution, scale, aspectRatio;
+     // right off the bat we set the canvas's inner dimensions to
+     // whatever it's current css dimensions are; this isn't likely to be
+     // the same size that dosbox/jsmess will set it to, but it avoids
+     // the case where the size was left at the default 300x150
+     if (!canvas.hasAttribute("width")) {
+       canvas.width = parseInt(getComputedStyle(canvas).width, 10);
+       canvas.height = parseInt(getComputedStyle(canvas).height, 10);
+     }
+
+     this.setScale = function(_scale) {
+       scale = _scale;
+       return this;
+     };
+
+     this.setSplashImage = function(_splashimg) {
+       if (_splashimg) {
+         splashimg.src = _splashimg;
+       }
+       return this;
+     };
+
+     this.setCSSResolution = function(_resolution) {
+       css_resolution = _resolution;
+       return this;
+     };
+
+     this.setAspectRatio = function(_aspectRatio) {
+       aspectRatio = _aspectRatio;
+       return this;
+     };
+
+     this.setcallback = function(_callback) {
+       callback = _callback;
+       return this;
+     };
+
+     this.setSplashColors = function (colors) {
+       splash.colors = colors;
+       return this;
+     };
+
+     this.setLoad = function (loadFunc) {
+       loadFiles = loadFunc;
+       return this;
+     };
+
+     var start = function (options) {
+       if (has_started)
+         return false;
+       has_started = true;
+       if (typeof options !== 'object') {
+         options = { waitAfterDownloading: false };
+       }
+
+       var k, c, game_data;
+       drawsplash();
+
+       var loading;
+
+       if (typeof loadFiles === 'function') {
+         loading = loadFiles(fetch_file, splash);
+       } else {
+         loading = Promise.resolve(loadFiles);
+       }
+       loading.then(function (_game_data) {
+                      game_data = _game_data;
+                      game_data.fs = new BrowserFS.FileSystem.MountableFileSystem();
+                      var Buffer = BrowserFS.BFSRequire('buffer').Buffer;
+
+                      function fetch(file) {
+                        if ('data' in file && file.data !== null && typeof file.data !== 'undefined') {
+                          return Promise.resolve(file.data);
+                        }
+                        return fetch_file(file.title, file.url, 'arraybuffer', file.optional);
+                      }
+
+                      function mountat(drive) {
+                        return function (data) {
+                          if (data !== null) {
+                            drive = drive.toLowerCase();
+                            var mountpoint = '/'+ drive;
+                            game_data.fs.mount(mountpoint, BFSOpenZip(new Buffer(data)));
+                          }
+                        };
+                      }
+
+                      function saveat(filename) {
+                        return function (data) {
+                          if (data !== null) {
+                            game_data.fs.writeFileSync('/'+ filename, new Buffer(data), null, flag_w, 0x1a4);
+                          }
+                        };
+                      }
+
+                      return Promise.all(game_data.files.map(function (f) {
+                                                               if (f && f.file)
+                                                                 if (f.drive) {
+                                                                   return fetch(f.file).then(mountat(f.drive));
+                                                                 } else if (f.mountpoint) {
+                                                                   return fetch(f.file).then(saveat(f.mountpoint));
+                                                                 }
+                                                               return null;
+                                                             }));
+                    })
+              .then(function (game_files) {
+                      if (options.waitAfterDownloading) {
+                        return new Promise(function (resolve, reject) {
+                                             splash.loading_text = 'Press any key to continue...';
+                                             splash.spinning = false;
+
+                                             // stashes these event listeners so that we can remove them after
+                                             window.addEventListener('keypress', k = keyevent(resolve));
+                                             canvas.addEventListener('click', c = resolve);
+                                           });
+                      }
+                      return Promise.resolve();
+                    },
+                    function () {
+                      splash.loading_text = 'Failed to download game data!';
+                      splash.failed_loading = true;
+                    })
+              .then(function () {
+                      splash.spinning = true;
+                      window.removeEventListener('keypress', k);
+                      canvas.removeEventListener('click', c);
+
+                      // Don't let arrow, pg up/down, home, end affect page position
+                      blockSomeKeys();
+                      setupFullScreen();
+                      disableRightClickContextMenu(canvas);
+                      if (game_data.needs_jsmess_webaudio)
+                        setup_jsmess_webaudio();
+
+                      // Emscripten doesn't use the proper prefixed functions for fullscreen requests,
+                      // so let's map the prefixed versions to the correct function.
+                      canvas.requestPointerLock = getpointerlockenabler();
+
+                      moveConfigToRoot(game_data.fs);
+                      Module = init_module(game_data.emulator_arguments, game_data.fs, game_data.locateAdditionalJS,
+                                           game_data.nativeResolution, game_data.aspectRatio);
+
+                      if (game_data.emulatorJS) {
+                        splash.loading_text = 'Launching Emulator';
+                        attach_script(game_data.emulatorJS);
+                      } else {
+                        splash.loading_text = 'Non-system disk or disk error';
+                      }
+                    },
+                    function () {
+                      splash.loading_text = 'Invalid media, track 0 bad or unusable';
+                      splash.failed_loading = true;
+                    });
+       return this;
+     };
+     this.start = start;
+
+     var init_module = function(args, fs, locateAdditionalJS, nativeResolution, aspectRatio) {
+       return { arguments: args,
+                screenIsReadOnly: true,
+                print: function (text) { console.log(text); },
+                canvas: canvas,
+                noInitialRun: false,
+                locateFile: locateAdditionalJS,
+                preInit: function () {
+                           splash.loading_text = 'Loading game file(s) into file system';
+                           // Re-initialize BFS to just use the writable in-memory storage.
+                           BrowserFS.initialize(fs);
+                           var BFS = new BrowserFS.EmscriptenFS();
+                           // Mount the file system into Emscripten.
+                           FS.mkdir('/emulator');
+                           FS.mount(BFS, {root: '/'}, '/emulator');
+                           splash.finished_loading = true;
+                           setTimeout(function () {
+                                        resizeCanvas(canvas,
+                                                     scale = scale || scale,
+                                                     css_resolution = nativeResolution || css_resolution,
+                                                     aspectRatio = aspectRatio || aspectRatio);
+                                      });
+                           if (callback) {
+                               window.setTimeout(function() { callback(this); }, 0);
+                           }
+                         }
+              };
+     };
+
+     var formatSize = function (event) {
+       if (event.lengthComputable)
+         return "("+ (event.total ? (event.loaded / event.total * 100).toFixed(0)
+                                  : "100") +
+                "%; "+ formatBytes(event.loaded) +
+                " of "+ formatBytes(event.total) +")";
+       return "("+ formatBytes(event.loaded) +")";
+     };
+
+     var formatBytes = function (bytes, base10) {
+         if (bytes === 0)
+           return "0 B";
+         var unit = base10 ? 1000 : 1024,
+             units = base10 ? ["B", "kB","MB","GB","TB","PB","EB","ZB","YB"]
+                            : ["B", "KiB","MiB","GiB","TiB","PiB","EiB","ZiB","YiB"],
+             exp = parseInt((Math.log(bytes) / Math.log(unit))),
+             size = bytes / Math.pow(unit, exp);
+         return size.toFixed(1) +' '+ units[exp];
+     };
+
+     var fetch_file = function (title, url, rt, optional) {
+       var table = document.getElementById("dosbox-progress-indicator");
+       var row, statusCell, titleCell, sizeCell;
+       if (!table) {
+         table = document.createElement('table');
+         table.setAttribute('id', "dosbox-progress-indicator");
+         table.style.position = 'absolute';
+         table.style.top = (canvas.offsetTop + (canvas.height / 2 + splashimg.height / 2) + 16 - (64/2)) +'px';
+         table.style.left = canvas.offsetLeft + (64 + 32) +'px';
+         table.style.color = 'foreground' in splash.colors ? splash.colors.foreground : 'black';
+         canvas.parentElement.appendChild(table);
+       }
+       row = table.insertRow(-1);
+       statusCell = row.insertCell(-1);
+       statusCell.textContent = '—';
+       statusCell.style.width = "1.5em";
+       titleCell = row.insertCell(-1);
+       titleCell.textContent = title;
+       titleCell.style.paddingRight = "1em";
+       sizeCell = row.insertCell(-1);
+       sizeCell.textContent = '—';
+       sizeCell.style.fontSize = "smaller";
+
+       return new Promise(function (resolve, reject) {
+                            var xhr = new XMLHttpRequest();
+                            xhr.open('GET', url, true);
+                            xhr.responseType = rt ? rt : 'arraybuffer';
+                            xhr.onprogress = function (e) {
+                                               sizeCell.textContent = formatSize(e);
+                                             };
+                            xhr.onload = function (e) {
+                                           sizeCell.textContent = formatSize(e);
+                                           if (xhr.status === 200) {
+                                             statusCell.textContent = '✔';
+                                             resolve(xhr.response);
+                                           }
+                                         };
+                            xhr.onerror = function (e) {
+                                            sizeCell.textContent = formatSize(e);
+                                            if (optional) {
+                                              statusCell.textContent = '?';
+                                              resolve(null);
+                                            } else {
+                                              statusCell.textContent = '✘';
+                                              reject();
+                                            }
+                                          };
+                            xhr.send();
+                          });
+     };
+
+     function keyevent(resolve) {
+       return function (e) {
+                if (typeof loader_game === 'object')
+                  return; // game will start with click-to-play instead of [SPACE] char
+                if (e.which == 32) {
+                  e.preventDefault();
+                  resolve();
+                }
+              };
+     };
+
+     var resizeCanvas = function (canvas, scale, resolution, aspectRatio) {
+       if (scale && resolution) {
+         canvas.style.imageRendering = 'optimizeSpeed';
+         canvas.style.imageRendering = '-moz-crisp-edges';
+         canvas.style.imageRendering = '-o-crisp-edges';
+         canvas.style.imageRendering = '-webkit-optimize-contrast';
+         canvas.style.imageRendering = 'optimize-contrast';
+         canvas.style.imageRendering = 'crisp-edges';
+         canvas.style.imageRendering = 'pixelated';
+
+         canvas.style.width = resolution.width * scale +'px';
+         canvas.style.height = resolution.height * scale +'px';
+         canvas.width = resolution.width;
+         canvas.height = resolution.height;
+       }
+     };
+
+     var drawsplash = function () {
+       canvas.setAttribute('moz-opaque', '');
+       var context = canvas.getContext('2d');
+       if (splashimg.src && splashimg.complete) {
+         draw_loading_status(0);
+         animLoop(draw_loading_status);
+       } else {
+           splashimg.onload = function () {
+                                draw_loading_status(0);
+                                animLoop(draw_loading_status);
+                              };
+           if (!splashimg.src) {
+             splashimg.src = '/images/dosbox.png';
+           }
+       }
+     };
+
+     var draw_loading_status = function (deltaT) {
+       var context = canvas.getContext('2d');
+       context.fillStyle = "background" in splash.colors ? splash.colors.background : 'white';
+       context.fillRect(0, 0, canvas.width, canvas.height);
+       context.drawImage(splashimg, canvas.width / 2 - (splashimg.width / 2), canvas.height / 3 - (splashimg.height / 2));
+
+       var spinnerpos = (canvas.height / 2 + splashimg.height / 2) + 16;
+       context.save();
+       context.translate((64/2) + 16, spinnerpos);
+       context.rotate(splash.spinning ? (splash.spinner_rotation += 2 * (2*Math.PI/1000) * deltaT)
+                                      : 0);
+       context.drawImage(spinnerimg, -(64/2), -(64/2), 64, 64);
+       context.restore();
+
+       context.save();
+       context.font = '18px sans-serif';
+       context.fillStyle = "foreground" in splash.colors ? splash.colors.foreground : 'black';
+       context.textAlign = 'center';
+       context.fillText(splash.loading_text, canvas.width / 2, (canvas.height / 2) + (splashimg.height / 4));
+
+       context.restore();
+
+       var table = document.getElementById("dosbox-progress-indicator");
+       if (table) {
+         table.style.top = (canvas.offsetTop + (canvas.height / 2 + splashimg.height / 2) + 16 - (64/2)) +'px';
+         table.style.left = canvas.offsetLeft + (64 + 32) +'px';
+         table.style.color = "foreground" in splash.colors ? splash.colors.foreground : 'black';
+       }
+
+       if (splash.finished_loading && table) {
+         table.style.display = 'none';
+       }
+       if (splash.finished_loading || splash.failed_loading) {
+         return false;
+       }
+       return true;
+     };
+
+     function attach_script(js_url) {
+         if (js_url) {
+           var head = document.getElementsByTagName('head')[0];
+           var newScript = document.createElement('script');
+           newScript.type = 'text/javascript';
+           newScript.src = js_url;
+           head.appendChild(newScript);
+         }
+     }
+
+     function getpointerlockenabler() {
+       return canvas.requestPointerLock || canvas.mozRequestPointerLock || canvas.webkitRequestPointerLock;
+     }
+
+     function getfullscreenenabler() {
+       return canvas.webkitRequestFullScreen || canvas.mozRequestFullScreen || canvas.requestFullScreen;
+     }
+
+     this.isfullscreensupported = function () {
+        return !!(getfullscreenenabler());
+     };
+
+     function setupFullScreen() {
+       var self = this;
+       var fullScreenChangeHandler = function() {
+                                       if (!(document.mozFullScreenElement || document.fullScreenElement)) {
+                                         resizeCanvas(canvas, scale, css_resolution, aspectRatio);
+                                       }
+                                     };
+       if ('onfullscreenchange' in document) {
+         document.addEventListener('fullscreenchange', fullScreenChangeHandler);
+       } else if ('onmozfullscreenchange' in document) {
+         document.addEventListener('mozfullscreenchange', fullScreenChangeHandler);
+       } else if ('onwebkitfullscreenchange' in document) {
+         document.addEventListener('webkitfullscreenchange', fullScreenChangeHandler);
+       }
+     };
+
+     this.requestFullScreen = function () {
+       Module.requestFullScreen(1, 0);
+     };
+
+     /**
+       * Prevents page navigation keys such as page up/page down from
+       * moving the page while the user is playing.
+       */
+     function blockSomeKeys() {
+       var blocked_keys = [33, 34, 35, 36, 37, 38, 39, 40];
+       function keypress (e) {
+         if (blocked_keys.indexOf(e.which) >= 0) {
+           e.preventDefault();
+           return false;
+         }
+         return true;
+       }
+       window.onkeydown = keypress;
+     }
+
+     /**
+       * Disables the right click menu for the given element.
+       */
+     function disableRightClickContextMenu(element) {
+       element.addEventListener('contextmenu',
+                                function (e) {
+                                  if (e.button == 2) {
+                                    // Block right-click menu thru preventing default action.
+                                    e.preventDefault();
+                                  }
+                                });
+     }
+   };
+
+   function BFSOpenZip(loadedData) {
+       var zipfs = new BrowserFS.FileSystem.ZipFS(loadedData),
+           mfs = new BrowserFS.FileSystem.MountableFileSystem(),
+           memfs = new BrowserFS.FileSystem.InMemory();
+       mfs.mount('/zip', zipfs);
+       mfs.mount('/mem', memfs);
+       // Copy the read-only zip file contents to a writable in-memory storage.
+       recursiveCopy(mfs, '/zip', '/mem');
+       return memfs;
+   };
+
+   // This is such a hack. We're not calling the BrowserFS api
+   // "correctly", so we have to synthesize these flags ourselves
+   var flag_r = { isReadable: function() { return true; },
+                  isWriteable: function() { return false; },
+                  isTruncating: function() { return false; },
+                  isAppendable: function() { return false; },
+                  isSynchronous: function() { return false; },
+                  isExclusive: function() { return false; },
+                  pathExistsAction: function() { return 0; },
+                  pathNotExistsAction: function() { return 1; }
+                };
+   var flag_w = { isReadable: function() { return false; },
+                  isWriteable: function() { return true; },
+                  isTruncating: function() { return false; },
+                  isAppendable: function() { return false; },
+                  isSynchronous: function() { return false; },
+                  isExclusive: function() { return false; },
+                  pathExistsAction: function() { return 0; },
+                  pathNotExistsAction: function() { return 3; }
+                };
+
+   // Helper function: Recursively copies contents from one folder to another.
+   function recursiveCopy(fs, oldDir, newDir) {
+       var path = BrowserFS.BFSRequire('path');
+       copyDirectory(oldDir, newDir);
+       function copyDirectory(oldDir, newDir) {
+           if (!fs.existsSync(newDir)) {
+               fs.mkdirSync(newDir, 0777);
+           }
+           fs.readdirSync(oldDir).forEach(function(item) {
+               var p = path.resolve(oldDir, item),
+                   newP = path.resolve(newDir, item);
+               if (fs.statSync(p).isDirectory()) {
+                   copyDirectory(p, newP);
+               } else {
+                   copyFile(p, newP);
+               }
+           });
+       }
+       function copyFile(oldFile, newFile) {
+           fs.writeFileSync(newFile,
+                            fs.readFileSync(oldFile, null, flag_r),
+                            null, flag_w, 0644);
+       }
+   };
+
+   /**
+    * Searches for dosbox.conf, and moves it to '/dosbox.conf' so dosbox uses it.
+    */
+   function moveConfigToRoot(fs) {
+     var dosboxConfPath = null;
+     // Recursively search for dosbox.conf.
+     function searchDirectory(dirPath) {
+       fs.readdirSync(dirPath).forEach(function(item) {
+         // Avoid infinite recursion by ignoring these entries, which exist at
+         // the root.
+         if (item === '.' || item === '..') {
+           return;
+         }
+         // Append '/' between dirPath and the item's name... unless dirPath
+         // already ends in it (which always occurs if dirPath is the root, '/').
+         var itemPath = dirPath + (dirPath[dirPath.length - 1] !== '/' ? "/" : "") + item,
+             itemStat = fs.statSync(itemPath);
+         if (itemStat.isDirectory(itemStat.mode)) {
+           searchDirectory(itemPath);
+         } else if (item === 'dosbox.conf') {
+           dosboxConfPath = itemPath;
+         }
+       });
+     }
+
+     searchDirectory('/');
+
+     if (dosboxConfPath !== null) {
+       fs.writeFileSync('/dosbox.conf',
+                        fs.readFileSync(dosboxConfPath, null, flag_r),
+                        null, flag_w, 0x1a4);
+     }
+   };
+
+   function extend(a, b) {
+     if (a === null)
+       return b;
+     if (b === null)
+       return a;
+     var ta = typeof a,
+         tb = typeof b;
+     if (ta !== tb) {
+       if (ta === 'undefined')
+         return b;
+       if (tb === 'undefined')
+         return a;
+       throw new Error("Cannot extend an "+ ta +" with an "+ tb);
+     }
+     if (Array.isArray(a))
+       return a.concat(b);
+     if (ta === 'object') {
+       Object.keys(b).forEach(function (k) {
+                                a[k] = extend(a[k], b[k]);
+                              });
+       return a;
+     }
+     return b;
+   }
+
+   window.IALoader = IALoader;
+   window.DosBoxLoader = DosBoxLoader;
+   window.JSMESSLoader = JSMESSLoader;
+   window.JSMAMELoader = JSMAMELoader;
+   window.Emulator = Emulator;
+ })(typeof Promise === 'undefined' ? ES6Promise.Promise : Promise);
+
+// Cross browser, backward compatible solution
+(function(window, Date) {
+   // feature testing
+   var raf = window.requestAnimationFrame ||
+             window.mozRequestAnimationFrame ||
+             window.webkitRequestAnimationFrame ||
+             window.msRequestAnimationFrame ||
+             window.oRequestAnimationFrame;
+
+   window.animLoop = function (render, element) {
+                       var running, lastFrame = +new Date;
+                       function loop (now) {
+                         if (running !== false) {
+                           // fallback to setTimeout if requestAnimationFrame wasn't found
+                           raf ? raf(loop, element)
+                               : setTimeout(loop, 1000 / 60);
+                           // Make sure to use a valid time, since:
+                           // - Chrome 10 doesn't return it at all
+                           // - setTimeout returns the actual timeout
+                           now = now && now > 1E4 ? now : +new Date;
+                           var deltaT = now - lastFrame;
+                           // do not render frame when deltaT is too high
+                           if (deltaT < 160) {
+                             running = render(deltaT, now);
+                           }
+                           lastFrame = now;
+                         }
+                       }
+                       loop();
+                     };
+})(window, Date);
+
+// Usage
+//animLoop(function (deltaT, now) {
+//           // rendering code goes here
+//           // return false; will stop the loop
+//         },
+//         animWrapper);
+
+// legacy
+var JSMESS = JSMESS || {};
+JSMESS.ready = function (f) { f(); };
+
+function setup_jsmess_webaudio() {
+  // jsmess web audio backend v0.2
+  // katelyn gadd - kg at luminance dot org ; @antumbral on twitter
+
+  var jsmess_web_audio = (function () {
+
+  var context = null;
+  var gain_node = null;
+  var buffer_insert_point = null;
+  var pending_buffers = [];
+
+  var numChannels = 2; // constant in jsmess
+  var sampleScale = 32766;
+  var prebufferDuration = 100 / 1000;
+
+  function lazy_init () {
+    if (context || typeof AudioContext == 'undefined')
+      return;
+
+    context = new AudioContext();
+
+    gain_node = context.createGain();
+    gain_node.gain.value = 1.0;
+    gain_node.connect(context.destination);
+  };
+
+  function set_mastervolume (
+    // even though it's 'attenuation' the value is negative, so...
+    attenuation_in_decibels
+  ) {
+    lazy_init();
+    if (!context) return;
+
+    // http://stackoverflow.com/questions/22604500/web-audio-api-working-with-decibels
+    // seemingly incorrect/broken. figures. welcome to Web Audio
+    // var gain_web_audio = 1.0 - Math.pow(10, 10 / attenuation_in_decibels);
+
+    // HACK: Max attenuation in JSMESS appears to be 32.
+    // Hit ' then left/right arrow to test.
+    // FIXME: This is linear instead of log10 scale.
+    var gain_web_audio = 1.0 + (+attenuation_in_decibels / +32);
+    if (gain_web_audio < +0)
+      gain_web_audio = +0;
+    else if (gain_web_audio > +1)
+      gain_web_audio = +1;
+
+    gain_node.gain.value = gain_web_audio;
+  };
+
+  function update_audio_stream (
+    pBuffer,           // pointer into emscripten heap. int16 samples
+    samples_this_frame // int. number of samples at pBuffer address.
+  ) {
+    lazy_init();
+    if (!context) return;
+
+    var buffer = context.createBuffer(
+      numChannels, samples_this_frame,
+      // JSMESS already initializes its mixer to use the context sampling rate.
+      context.sampleRate
+    );
+
+    for (
+      var channel_left  = buffer.getChannelData(0),
+          channel_right = buffer.getChannelData(1),
+          i = 0,
+          l = samples_this_frame | 0;
+      i < l;
+      i++
+    ) {
+      var offset =
+        // divide by sizeof(INT16) since pBuffer is offset
+        //  in bytes
+        ((pBuffer / 2) | 0) +
+        ((i * 2) | 0);
+
+      var left_sample = HEAP16[offset];
+      var right_sample = HEAP16[(offset + 1) | 0];
+
+      // normalize from signed int16 to signed float
+      var left_sample_float = left_sample / sampleScale;
+      var right_sample_float = right_sample / sampleScale;
+
+      channel_left[i] = left_sample_float;
+      channel_right[i] = right_sample_float;
+    }
+
+    pending_buffers.push(buffer);
+
+    tick();
+  };
+
+  function tick () {
+    // Note: this is the time the web audio mixer has mixed up to,
+    //  not the actual current time.
+    var now = context.currentTime;
+
+    // prebuffering
+    if (buffer_insert_point === null) {
+      var total_buffered_seconds = 0;
+
+      for (var i = 0, l = pending_buffers.length; i < l; i++) {
+        var buffer = pending_buffers[i];
+        total_buffered_seconds += buffer.duration;
+      }
+
+      // Buffer not full enough? abort
+      if (total_buffered_seconds < prebufferDuration)
+        return;
+    }
+
+    // FIXME/TODO: It's possible for us to burn through the whole
+    //  chunk of prebuffered audio. At that point it seems like
+    //  JSMESS never catches up and our sound glitches forever.
+
+    var insert_point = (buffer_insert_point === null)
+      ? now
+      : buffer_insert_point;
+
+    if (pending_buffers.length) {
+      for (var i = 0, l = pending_buffers.length; i < l; i++) {
+        var buffer = pending_buffers[i];
+
+        var source_node = context.createBufferSource();
+        source_node.buffer = buffer;
+        source_node.connect(gain_node);
+        source_node.start(insert_point);
+
+        insert_point += buffer.duration;
+      }
+
+      pending_buffers.length = 0;
+      buffer_insert_point = insert_point;
+
+      if (buffer_insert_point <= now)
+        buffer_insert_point = now;
+    }
+  };
+  function get_context() {
+    return context;
+  };
+
+  return {
+    set_mastervolume: set_mastervolume,
+    update_audio_stream: update_audio_stream,
+    get_context: get_context
+  };
+
+  })();
+
+  window.jsmess_set_mastervolume = jsmess_web_audio.set_mastervolume;
+  window.jsmess_update_audio_stream = jsmess_web_audio.update_audio_stream;
+  window.jsmess_web_audio = jsmess_web_audio;
+}
diff --git a/testcases.md b/testcases.md
new file mode 100644
index 0000000..d0815e8
--- /dev/null
+++ b/testcases.md
@@ -0,0 +1,20 @@
+    [19:14] <db48x> if you've got a list then I'll be happy to run through it
+    [19:15] <SketchCow> Yeah, I think that's smart going forward.
+            <SketchCow> https://archive.org/details/arcade_astrob
+    [19:16] <SketchCow> Tests: Works with arcade machine, presentation
+    [19:17] <SketchCow> https://archive.org/details/sg_Wiz_n_Liz_1993_Psygnosis_US 
+            <SketchCow> Tests: Game Console (Sega Genesis), Very intense processing needs
+    [19:18] <SketchCow> https://archive.org/details/a2_Castle_Smurfenstein_1981_Dead_Smurf_cr
+            <SketchCow> Tests: Apple II performance (computer), sound
+    [19:19] <SketchCow> https://archive.org/details/msdos_Wolfenstein_3D_1992
+            <SketchCow> Tests: EM-DOSBOX Side, sound, etc.
+            <db48x> also parrallel file loads in Smurfenstein
+            <SketchCow> So, at the VERY LEAST
+            <SketchCow> These all shouldwork
+            <SketchCow> If something blows up, there's something wrong.
+    [19:20] <SketchCow> That's a solid test set. 
+            <SketchCow> Obviously, Dragon's Lair is our go-to for "holy fuck, large ROM"
+    [20:31] <db48x> I'm going to add snack attack to that list, since it's easy to tell when it's running too fast
+    [01:51] <SketchCow> Yes!
+
+https://archive.org/details/msdos_Snack_Attack_II_1982&external_js=1