diff --git a/Makefile b/Makefile
index 880d4e6d..c303b05f 100644
--- a/Makefile
+++ b/Makefile
@@ -80,7 +80,7 @@ CORE_FILES=const.js io.js main.js lib.js fpu.js ide.js pci.js floppy.js memory.j
 LIB_FILES=9p.js filesystem.js jor1k.js marshall.js utf8.js
 BROWSER_FILES=screen.js \
 	      keyboard.js mouse.js serial.js \
-	      network.js lib.js starter.js worker_bus.js
+	      network.js lib.js starter.js worker_bus.js dummy_screen.js
 
 CORE_FILES:=$(addprefix src/,$(CORE_FILES))
 LIB_FILES:=$(addprefix lib/,$(LIB_FILES))
diff --git a/src/browser/dummy_screen.js b/src/browser/dummy_screen.js
new file mode 100644
index 00000000..ec688b88
--- /dev/null
+++ b/src/browser/dummy_screen.js
@@ -0,0 +1,187 @@
+"use strict";
+
+/**
+ * @constructor
+ *
+ * @param {BusConnector} bus
+ */
+function DummyScreenAdapter(bus)
+{
+    var
+        graphic_image_data,
+        graphic_buffer,
+        graphic_buffer32,
+
+        /** @type {number} */
+        cursor_row,
+
+        /** @type {number} */
+        cursor_col,
+
+        graphical_mode_width,
+        graphical_mode_height,
+
+        // are we in graphical mode now?
+        is_graphical = false,
+
+        // Index 0: ASCII code
+        // Index 1: Background color
+        // Index 2: Foreground color
+        text_mode_data,
+
+        // number of columns
+        text_mode_width,
+
+        // number of rows
+        text_mode_height;
+
+    this.bus = bus;
+
+    bus.register("screen-set-mode", function(data)
+    {
+        this.set_mode(data);
+    }, this);
+
+    bus.register("screen-fill-buffer-end", function(data)
+    {
+        var min = data[0];
+        var max = data[1];
+
+        this.update_buffer(min, max);
+    }, this);
+
+    bus.register("screen-put-char", function(data)
+    {
+        //console.log(data);
+        this.put_char(data[0], data[1], data[2], data[3], data[4]);
+    }, this);
+
+    bus.register("screen-text-scroll", function(rows)
+    {
+        console.log("scroll", rows);
+    }, this);
+
+    bus.register("screen-update-cursor", function(data)
+    {
+        this.update_cursor(data[0], data[1]);
+    }, this);
+    bus.register("screen-update-cursor-scanline", function(data)
+    {
+        this.update_cursor_scanline(data[0], data[1]);
+    }, this);
+
+    bus.register("screen-set-size-text", function(data)
+    {
+        this.set_size_text(data[0], data[1]);
+    }, this);
+    bus.register("screen-set-size-graphical", function(data)
+    {
+        this.set_size_graphical(data[0], data[1]);
+    }, this);
+
+    this.put_char = function(row, col, chr, bg_color, fg_color)
+    {
+        if(row < text_mode_height && col < text_mode_width)
+        {
+            var p = 3 * (row * text_mode_width + col);
+
+            text_mode_data[p] = chr;
+            text_mode_data[p + 1] = bg_color;
+            text_mode_data[p + 2] = fg_color;
+        }
+    };
+
+    this.destroy = function()
+    {
+    };
+
+    this.set_mode = function(graphical)
+    {
+        is_graphical = graphical;
+    };
+
+    this.clear_screen = function()
+    {
+    };
+
+    /**
+     * @param {number} cols
+     * @param {number} rows
+     */
+    this.set_size_text = function(cols, rows)
+    {
+        if(cols === text_mode_width && rows === text_mode_height)
+        {
+            return;
+        }
+
+        text_mode_data = new Int32Array(cols * rows * 3);
+
+        text_mode_width = cols;
+        text_mode_height = rows;
+    };
+
+    this.set_size_graphical = function(width, height)
+    {
+        graphic_buffer = new Uint8Array(4 * width * height);
+        graphic_buffer32 = new Int32Array(graphic_buffer.buffer);
+
+        graphical_mode_width = width;
+        graphical_mode_height = height;
+
+        this.bus.send("screen-tell-buffer", [graphic_buffer32], [graphic_buffer32.buffer]);
+    };
+
+    this.set_scale = function(s_x, s_y)
+    {
+    };
+
+    this.update_cursor_scanline = function(start, end)
+    {
+    };
+
+    this.update_cursor = function(row, col)
+    {
+        if(row !== cursor_row || col !== cursor_col)
+        {
+            cursor_row = row;
+            cursor_col = col;
+        }
+    };
+
+    this.update_buffer = function(min, max)
+    {
+        if(max < min)
+        {
+            return;
+        }
+
+        var min_y = min / graphical_mode_width | 0;
+        var max_y = max / graphical_mode_width | 0;
+    };
+
+    this.get_text_screen = function()
+    {
+        var screen = [];
+
+        for(var i = 0; i < text_mode_height; i++)
+        {
+            screen.push(this.get_text_row(i));
+        }
+
+        return screen;
+    };
+
+    this.get_text_row = function(i)
+    {
+        var row = "";
+        var offset = 3 * i * text_mode_width;
+
+        for(var j = 0; j < text_mode_width; j++)
+        {
+            row += String.fromCharCode(text_mode_data[offset + 3 * j]);
+        }
+
+        return row;
+    };
+}
diff --git a/src/browser/starter.js b/src/browser/starter.js
index 7c6e6d1d..2cd969f6 100644
--- a/src/browser/starter.js
+++ b/src/browser/starter.js
@@ -140,6 +140,10 @@ function V86Starter(options)
     {
         this.screen_adapter = new ScreenAdapter(options["screen_container"], adapter_bus);
     }
+    else if(options["screen_dummy"])
+    {
+        this.screen_adapter = new DummyScreenAdapter(adapter_bus);
+    }
 
     if(options["serial_container"])
     {
@@ -416,7 +420,7 @@ function V86Starter(options)
                 {
                     this.bus.send("cpu-run");
                 }
-            }.bind(this), 0)
+            }.bind(this), 0);
         }.bind(this), 0);
     }
 }
@@ -841,7 +845,7 @@ V86Starter.prototype.create_file = function(file, data, callback)
 
     var path_infos = fs.SearchPath(file);
     var parent_id = path_infos.parentid;
-    var not_found = filename === "" || parent_id === -1
+    var not_found = filename === "" || parent_id === -1;
 
     if(!not_found)
     {