diff --git a/index.html b/index.html
index f7e13896..18648281 100644
--- a/index.html
+++ b/index.html
@@ -137,7 +137,7 @@ if (window.location.host.endsWith('8bitworkshop.com')) {
   </select>
 
   <img id="compile_spinner" src="images/spinner.gif" height="20em" style="visibility:hidden;margin-left:8px;margin-right:8px">
-  <span class="btn_group debug_group" id="debug_bar">
+  <span class="btn_group debug_group hidden-xs" id="debug_bar">
     <button id="dbg_reset" type="button" title="Reset and Break"><span class="glyphicon glyphicon-refresh" aria-hidden="true"></span></button>
     <button id="dbg_pause" type="button" title="Pause"><span class="glyphicon glyphicon-pause" aria-hidden="true"></span></button>
     <button id="dbg_go" type="button" title="Run"><span class="glyphicon glyphicon-play" aria-hidden="true"></span></button>
@@ -147,7 +147,7 @@ if (window.location.host.endsWith('8bitworkshop.com')) {
     <button id="dbg_stepout" type="button" title="Step Out of Subroutine"><span class="glyphicon glyphicon-hand-up" aria-hidden="true"></span></button>
     <button id="dbg_stepback" type="button" title="Step Backwards"><span class="glyphicon glyphicon-step-backward" aria-hidden="true"></span></button>
   </span>
-  <span class="btn_group view_group" id="extra_bar">
+  <span class="btn_group view_group hidden-sm hidden-xs" id="extra_bar">
     <button id="dbg_timing" type="button" title="Analyze CPU Timing" style="display:none"><span class="glyphicon glyphicon-time" aria-hidden="true"></span></button>
     <button id="dbg_disasm" type="button" title="Show Disassembly" style="display:none"><span class="glyphicon glyphicon-list" aria-hidden="true"></span></button>
     <button id="dbg_memory" type="button" title="Show Memory" style="display:none"><span class="glyphicon glyphicon-sunglasses" aria-hidden="true"></span></button>
@@ -156,7 +156,7 @@ if (window.location.host.endsWith('8bitworkshop.com')) {
     <button id="dbg_record" type="button" title="Start/Stop Replay Recording" style="display:none"><span class="glyphicon glyphicon-record" aria-hidden="true"></span></button>
     <button id="dbg_help" type="button" title="Help" style="display:none"><span class="glyphicon glyphicon-question-sign" aria-hidden="true"></span></button>
   </span>
-  <span class="btn_group view_group" id="speed_bar" style="display:none">
+  <span class="btn_group view_group hidden-sm hidden-xs" id="speed_bar" style="display:none">
     <button id="dbg_slowest" type="button" title="Slowest"><span class="glyphicon glyphicon-fast-backward" aria-hidden="true"></span></button>
     <button id="dbg_slower" type="button" title="Slower"><span class="glyphicon glyphicon-backward" aria-hidden="true"></span></button>
     <span class="label"><span id="fps_label">60.00</span> fps</span>
@@ -352,8 +352,16 @@ function require(modname) {
 <script src="gen/waveform.js"></script>
 <script src="gen/ui.js"></script>
 <!-- <script src="src/audio/votrax.js"></script> -->
+<!-- <script src="local/lzg.js"></script> -->
 
-<script src="local/lzg.js"></script>
+<script>
+// submenus open on click + hover
+$( ".dropdown-submenu" ).click(function(event) {
+    event.stopPropagation();
+    $(this).parent().siblings().removeClass('open');
+    $(this).parent().toggleClass('open');
+});
+</script>
 
 <script>
   startUI(true);
diff --git a/src/platform/coleco.ts b/src/platform/coleco.ts
index 18877b06..25e1a152 100644
--- a/src/platform/coleco.ts
+++ b/src/platform/coleco.ts
@@ -21,6 +21,8 @@ import { TMS9918A } from "../video/tms9918a";
 // http://www.msxcomputermagazine.nl/mccw/91/msx1demos1/en.html
 // http://www.segordon.com/colecovision.php
 // http://samdal.com/svvideo.htm
+// https://github.com/tursilion/convert9918
+// http://www.harmlesslion.com/cgi-bin/showprog.cgi?ColecoVision
 
 var ColecoVision_PRESETS = [
   {id:'text.c', name:'Text Mode'},