diff --git a/README.md b/README.md
index fea8a40..4652136 100644
--- a/README.md
+++ b/README.md
@@ -35,13 +35,16 @@ of a config.
 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.emulatorJS("emulators/mess1943.js"),
-                                                 JSMAMELoader.mountFile("1943.zip",
-                                                                        JSMAMELoader.fetchFile("Game File",
-                                                                                               "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 ###
 
@@ -51,17 +54,19 @@ 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.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",
-                                                                                               "emulators/a2600.cfg")),
-                                                 JSMESSLoader.peripheral("cart", "Pitfall_Activision_1982.bin")))
+      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 ###
 
@@ -69,13 +74,16 @@ 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.mountZip("c",
-                                                                       DosBoxLoader.fetchFile("Game File",
-                                                                                              "examples/Zzt_1991_Epic_Megagames_Inc.zip")),
-                                                 DosBoxLoader.startExe("zzt.exe")))
+      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
diff --git a/example_arcade.html b/example_arcade.html
index f171036..078eb5c 100644
--- a/example_arcade.html
+++ b/example_arcade.html
@@ -18,7 +18,7 @@
                                                                           JSMAMELoader.fetchFile("Game File",
                                                                                                  "examples/1943.zip"))))
       emulator.setScale(3);
-      emulator.start();
+      emulator.start({ waitAfterDownloading: true });
     </script>
   </body>
 </html>
diff --git a/example_console.html b/example_console.html
index 86b48cf..5f03ceb 100644
--- a/example_console.html
+++ b/example_console.html
@@ -12,15 +12,16 @@
       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",
-                                                                                                 "emulators/a2600.cfg")),
+                                                                                                 "examples/a2600.cfg")),
                                                    JSMESSLoader.peripheral("cart", "Pitfall_Activision_1982.bin")))
-      emulator.start();
+      emulator.setScale(3).start({ waitAfterDownloading: true });
     </script>
   </body>
 </html>
diff --git a/example_dosbox.html b/example_dosbox.html
index b96e3ca..8eeb261 100644
--- a/example_dosbox.html
+++ b/example_dosbox.html
@@ -12,11 +12,12 @@
       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();
+      emulator.start({ waitAfterDownloading: true });
     </script>
   </body>
 </html>