diff --git a/lib/emulator.js b/lib/emulator.js
index db2621b..10d5524 100644
--- a/lib/emulator.js
+++ b/lib/emulator.js
@@ -24,6 +24,15 @@ function onConsoleOutput(txt) {
     console.log("EMSCRIPTEN:", txt);
 }
 
+/* Initialise the emulator,
+
+options = {
+  EMULATOR : "banglejs"/"banglejs2"
+  DEVICEID : "BANGLEJS"/"BANGLEJS2"
+  rxCallback : function(int) - called every time a character received
+  consoleOutputCallback : function(str) - called when a while line is received
+}
+*/
 exports.init = function(options) {
   if (options.EMULATOR)
     EMULATOR = options.EMULATOR;