Added Gameboy Emulator

src/rom/ajax_reader.js

@@ -0,0 +1,36 @@
+var GameboyJS;
+(function (GameboyJS) {
+"use strict";
+
+// A RomAjaxReader is able to load a file through an AJAX request
+var RomAjaxReader = function() {
+
+};
+
+// The callback argument will be called when a file is successfully
+// read, with the data as argument (Uint8Array)
+RomAjaxReader.prototype.setCallback = function(onLoadCallback) {
+    this.callback = onLoadCallback;
+};
+
+// This function should be called by application code
+// and will trigger the AJAX call itself and push data to the ROM object
+RomAjaxReader.prototype.loadFromUrl = function(url) {
+    if (!url) {
+        throw 'No url has been set in order to load a ROM file.';
+    }
+    var cb = this.callback;
+
+    var xhr = new XMLHttpRequest();
+    xhr.open('GET', url, true);
+    xhr.responseType = "arraybuffer";
+    xhr.onload = function() {
+        var rom = new Uint8Array(xhr.response);
+        cb && cb(rom);
+    };
+
+    xhr.send();
+};
+
+GameboyJS.RomAjaxReader = RomAjaxReader;
+}(GameboyJS || (GameboyJS = {})));