diff --git a/css/codemirror.css b/css/codemirror.css
index f49af69d..551a3c6a 100644
--- a/css/codemirror.css
+++ b/css/codemirror.css
@@ -366,7 +366,7 @@ span.CodeMirror-selectedtext { background: none; }
 
 .cm-s-mbo span.cm-comment { color: #95958a; }
 .cm-s-mbo span.cm-atom { color: #00a8c6; }
-.cm-s-mbo span.cm-number { color: #00a8c6; }
+.cm-s-mbo span.cm-number { color: #33aadd; }
 
 .cm-s-mbo span.cm-property, .cm-s-mbo span.cm-attribute { color: #9ddfe9; }
 .cm-s-mbo span.cm-keyword { color: #ffb928; }
@@ -376,7 +376,7 @@ span.CodeMirror-selectedtext { background: none; }
 .cm-s-mbo span.cm-variable { color: #ffffec; }
 .cm-s-mbo span.cm-variable-2 { color: #00a8c6; }
 .cm-s-mbo span.cm-variable-3 { color: #ffb928; }
-.cm-s-mbo span.cm-def { color: #ffff88; }
+.cm-s-mbo span.cm-def { color: #88eeff; }
 .cm-s-mbo span.cm-bracket { color: #fffffc; font-weight: bold; }
 .cm-s-mbo span.cm-tag { color: #9ddfe9; }
 .cm-s-mbo span.cm-link { color: #f54b07; }
@@ -414,3 +414,7 @@ span.CodeMirror-selectedtext { background: none; }
 
 .cm-s-cobalt .CodeMirror-activeline-background { background: #003399; }
 .cm-s-cobalt .CodeMirror-matchingbracket { outline:1px solid grey;color:white !important; }
+
+/*** FIXES FOR BOOTSTRAP ***/
+
+.CodeMirror-dialog > button { background-color: #333 !important; }
diff --git a/images/pause.png b/images/pause.png
deleted file mode 100644
index a8f3750d..00000000
Binary files a/images/pause.png and /dev/null differ
diff --git a/images/play.png b/images/play.png
deleted file mode 100644
index eb671ca3..00000000
Binary files a/images/play.png and /dev/null differ
diff --git a/images/resetandrun.png b/images/resetandrun.png
deleted file mode 100644
index 40aa6b41..00000000
Binary files a/images/resetandrun.png and /dev/null differ
diff --git a/images/runtoline.png b/images/runtoline.png
deleted file mode 100644
index 2f7ce52d..00000000
Binary files a/images/runtoline.png and /dev/null differ
diff --git a/images/share.png b/images/share.png
deleted file mode 100644
index ba54c712..00000000
Binary files a/images/share.png and /dev/null differ
diff --git a/images/singlestep.png b/images/singlestep.png
deleted file mode 100644
index 7a92a114..00000000
Binary files a/images/singlestep.png and /dev/null differ
diff --git a/images/timing.png b/images/timing.png
deleted file mode 100644
index f15888f6..00000000
Binary files a/images/timing.png and /dev/null differ
diff --git a/index.html b/index.html
index bf283dc9..a48ac908 100644
--- a/index.html
+++ b/index.html
@@ -186,6 +186,7 @@ canvas.pixelated {
       <li><a class="dropdown-item" href="#" id="item_new_file">New File...</a></li>
       <li><a class="dropdown-item" href="#" id="item_share_file">Share File...</a></li>
       <li><a class="dropdown-item" href="#" id="item_reset_file">Revert to Original...</a></li>
+      <!--
       <li class="dropdown dropdown-submenu">
           <a tabindex="-1" href="#">Platform</a>
           <ul class="dropdown-menu">
@@ -195,6 +196,7 @@ canvas.pixelated {
             <li><a class="dropdown-item" href="?platform=spaceinv" id="item_platform_spaceinv">Space Invaders</a></li>
           </ul>
       </li>
+      -->
       <li class="dropdown dropdown-submenu">
         <a tabindex="-1" href="#">Debug</a>
         <ul class="dropdown-menu">
@@ -206,15 +208,15 @@ canvas.pixelated {
   <select id="preset_select" name="">
   </select>
   <span id="debug_bar">
-    <button id="dbg_pause" type="button" title="Pause"><img src="images/pause.png"></button>
-    <button id="dbg_go" type="button" title="Run"><img src="images/play.png"></button>
-    <button id="dbg_step" type="submit" title="Step"><img src="images/singlestep.png"></button>
-    <button id="dbg_toline" type="submit" title="Run To Line"><img src="images/runtoline.png"></button>
-    <button id="dbg_stepout" type="submit" title="Step Out of Subroutine">RTS</button>
-    <button id="dbg_stepback" type="submit" title="Step Backwards">&lt;&lt;</button>
-    <button id="dbg_reset" type="submit" title="Reset and Break"><img src="images/resetandrun.png"></button>
-    <button id="dbg_timing" type="submit" title="See Timing" style="display:none"><img src="images/timing.png"></button>
-    <button id="dbg_disasm" type="submit" title="Toggle Disassembly">#</button>
+    <button id="dbg_reset" type="submit" 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>
+    <button id="dbg_step" type="submit" title="Step"><span class="glyphicon glyphicon-step-forward" aria-hidden="true"></span></button>
+    <button id="dbg_toline" type="submit" title="Run To Line"><span class="glyphicon glyphicon-save" aria-hidden="true"></span></button>
+    <button id="dbg_stepout" type="submit" title="Step Out of Subroutine"><span class="glyphicon glyphicon-hand-left" aria-hidden="true"></span></button>
+    <button id="dbg_stepback" type="submit" title="Step Backwards"><span class="glyphicon glyphicon-step-backward" aria-hidden="true"></span></button>
+    <button id="dbg_timing" type="submit" title="See Timing" style="display:none"><span class="glyphicon glyphicon-time" aria-hidden="true"></span></button>
+    <button id="dbg_disasm" type="submit" title="Toggle Disassembly" style="display:none"><span class="glyphicon glyphicon-list" aria-hidden="true"></span></button>
   </span>
   <span class="dbg_info" id="dbg_info"></span>
 </div>
diff --git a/package.json b/package.json
index 820eee5e..49be922b 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "8bitworkshop",
-  "version": "0.0.1",
+  "version": "0.0.2",
   "author": "Steven Hugg",
   "dependencies": {},
   "devDependencies": {
diff --git a/src/emu.js b/src/emu.js
index fefd6e79..3a790b89 100644
--- a/src/emu.js
+++ b/src/emu.js
@@ -630,6 +630,8 @@ var BaseZ80Platform = function() {
     if (fn.endsWith(".s")) return "sdasz80";
     return "z80asm";
   }
+  // TODO
+  //this.getOpcodeMetadata = function() { }
 }
 
 function padBytes(data, len) {
diff --git a/src/platform/spaceinv.js b/src/platform/spaceinv.js
index 546d9d5a..efe7f4d2 100644
--- a/src/platform/spaceinv.js
+++ b/src/platform/spaceinv.js
@@ -15,7 +15,7 @@ var SpaceInvadersPlatform = function(mainElement) {
   this.__proto__ = new BaseZ80Platform();
 
   var cpu, ram, membus, iobus, rom;
-  var video, audio, timer, pixels, displayPCs;
+  var video, timer, pixels, displayPCs;
   var inputs = [0xe,0x8,0x0];
   var bitshift_offset = 0;
   var bitshift_register = 0;
@@ -38,16 +38,6 @@ var SpaceInvadersPlatform = function(mainElement) {
     50:{i:1,b:1}, // 2
   }
 
-  this.getOpcodeMetadata = function() {
-    return {
-      opcode:0,
-      mnenomic:'?',
-      minCycles:0,
-      maxCycles:0,
-      insnlength:1
-    };
-  }
-
   this.getPresets = function() {
     return SPACEINV_PRESETS;
   }
@@ -58,10 +48,10 @@ var SpaceInvadersPlatform = function(mainElement) {
     membus = {
       read: function(address) {
         if (address < 0x2000) {
-          return rom ? rom[address] : 0;
+          return (rom ? rom[address] : 0) & 0xff;
         } else {
           address &= 0x1fff;
-          return ram.mem[address];
+          return ram.mem[address] & 0xff;
         }
       },
       write: function(address, value) {
@@ -122,7 +112,6 @@ var SpaceInvadersPlatform = function(mainElement) {
   		ioBus: iobus
   	});
     video = new RasterVideo(mainElement,256,224,{rotate:-90});
-    audio = new SampleAudio(cpuFrequency);
     video.create();
 		$(video.canvas).click(function(e) {
 			var x = Math.floor(e.offsetX * video.canvas.width / $(video.canvas).width());
@@ -215,11 +204,9 @@ var SpaceInvadersPlatform = function(mainElement) {
   }
   this.pause = function() {
     timer.stop();
-    audio.stop();
   }
   this.resume = function() {
     timer.start();
-    audio.start();
   }
   this.reset = function() {
     cpu.reset();
diff --git a/src/platform/vcs.js b/src/platform/vcs.js
index 261fba9f..5b4e3397 100644
--- a/src/platform/vcs.js
+++ b/src/platform/vcs.js
@@ -42,8 +42,6 @@ var VCSPlatform = function() {
   this.getPresets = function() { return VCS_PRESETS; }
 
   this.start = function() {
-    $("#dbg_timing").show();
-    $("#dbg_disasm").show();
     Javatari.start();
   }
 
diff --git a/src/ui.js b/src/ui.js
index 8abbc776..03ae0582 100644
--- a/src/ui.js
+++ b/src/ui.js
@@ -74,7 +74,7 @@ var SourceFile = function(lines, text) {
   }
   this.findLineForOffset = function(PC) {
     if (this.offset2line) {
-      for (var i=0; i<256; i++) {
+      for (var i=0; i<16; i++) {
         var line = this.offset2line[PC];
         if (line >= 0) {
           return line;
@@ -200,17 +200,9 @@ function gotoPresetAt(index) {
 }
 
 function gotoPresetNamed(id) {
-  if (id.startsWith("_")) {
-    var result = eval(id+"()");
-    console.log(id, result);
-    if (!result) {
-      updateSelector();
-    }
-  } else {
-    qs['platform'] = platform_id;
-    qs['file'] = id;
-    window.location = "?" + $.param(qs);
-  }
+  qs['platform'] = platform_id;
+  qs['file'] = id;
+  window.location = "?" + $.param(qs);
 }
 
 function _createNewFile(e) {
@@ -263,7 +255,7 @@ function _resetPreset(e) {
 }
 
 function populateExamples(sel) {
-  sel.append($("<option />").text("--------- Chapters ---------"));
+  sel.append($("<option />").text("--------- Chapters ---------").attr('disabled',true));
   for (var i=0; i<PRESETS.length; i++) {
     var preset = PRESETS[i];
     var name = preset.chapter + ". " + preset.name;
@@ -272,7 +264,7 @@ function populateExamples(sel) {
 }
 
 function populateLocalFiles(sel) {
-  sel.append($("<option />").text("------- Local Files -------"));
+  sel.append($("<option />").text("------- Local Files -------").attr('disabled',true));
   var filenames = store.getFiles("local/");
   for (var i = 0; i < filenames.length; i++) {
     var name = filenames[i];
@@ -282,7 +274,7 @@ function populateLocalFiles(sel) {
 }
 
 function populateSharedFiles(sel) {
-  sel.append($("<option />").text("--------- Shared ---------"));
+  sel.append($("<option />").text("--------- Shared ---------").attr('disabled',true));
   var filenames = store.getFiles("shared/");
   for (var i = 0; i < filenames.length; i++) {
     var name = filenames[i];
@@ -354,13 +346,15 @@ worker.onmessage = function(e) {
     var rom_changed = rom && !arrayCompare(rom, current_output);
     if (rom_changed) {
       try {
-        resume();
         //console.log("Loading ROM length", rom.length);
         platform.loadROM(getCurrentPresetTitle(), rom);
+        resume();
+        // TODO: what if loadROM fails?
         current_output = rom;
         pcvisits = {};
       } catch (e) {
-        console.log(e); // TODO
+        console.log(e); // TODO: show error
+        alert("Could not load ROM: " + e);
         current_output = null;
       }
     }
@@ -381,10 +375,12 @@ worker.onmessage = function(e) {
           editor.setGutterMarker(info.line-1, "gutter-bytes", textel);
           if (info.iscode) {
             var opcode = parseInt(info.insns.split()[0], 16);
-            var meta = platform.getOpcodeMetadata(opcode, info.offset);
-            var clockstr = meta.minCycles+"";
-            var textel = document.createTextNode(clockstr);
-            editor.setGutterMarker(info.line-1, "gutter-clock", textel);
+            if (platform.getOpcodeMetadata) {
+              var meta = platform.getOpcodeMetadata(opcode, info.offset);
+              var clockstr = meta.minCycles+"";
+              var textel = document.createTextNode(clockstr);
+              editor.setGutterMarker(info.line-1, "gutter-clock", textel);
+            }
           }
         }
       }
@@ -497,8 +493,8 @@ function getCurrentLine() {
 
 function runToCursor() {
   setupBreakpoint();
-  var line = sourcefile.getCurrentLine();
-  var pc = line2offset[line];
+  var line = getCurrentLine();
+  var pc = sourcefile.line2offset[line];
   if (pc >= 0) {
     console.log("Run to", line, pc.toString(16));
     platform.runEval(function(c) {
@@ -678,8 +674,8 @@ function showLoopTimingForPC(pc) {
   // recurse through all traces
   _traceInstructions(pc | platform.getOriginPC(), MAX_CLOCKS, MAX_CLOCKS);
   // show the lines
-  for (var line in line2offset) {
-    var pc = line2offset[line];
+  for (var line in sourcefile.line2offset) {
+    var pc = sourcefile.line2offset[line];
     var minclocks = pc2minclocks[pc];
     var maxclocks = pc2maxclocks[pc];
     if (minclocks>=0 && maxclocks>=0) {
@@ -774,8 +770,10 @@ function toggleDisassembly() {
 
 function resetAndDebug() {
   clearBreakpoint();
+  platform.resume();
   platform.reset();
-  platform.breakpointHit();
+  setupBreakpoint();
+  platform.runEval(function(c) { return true; });
 }
 
 function _breakExpression() {
@@ -795,11 +793,13 @@ function setupDebugControls(){
   $("#dbg_toline").click(runToCursor);
   $("#dbg_stepout").click(runUntilReturn);
   $("#dbg_stepback").click(runStepBackwards);
-  $("#dbg_timing").click(traceTiming);
-  if (platform.disassemble)
-    $("#dbg_disasm").click(toggleDisassembly);
-  else
-    $("#dbg_disasm").hide();
+  // TODO: vcs platform seems to show them regardless
+  if (platform_id == 'vcs') {
+    $("#dbg_timing").click(traceTiming).show();
+  }
+  if (platform.disassemble) {
+    $("#dbg_disasm").click(toggleDisassembly).show();
+  }
   $("#disassembly").hide();
   $(".dropdown-menu").collapse({toggle: false});
   $("#item_new_file").click(_createNewFile);
@@ -869,17 +869,19 @@ function startPlatform() {
   platform = new PLATFORMS[platform_id]($("#emulator")[0]);
   store = new FileStore(localStorage, platform_id + '/');
   PRESETS = platform.getPresets();
-  setupDebugControls();
-  platform.start();
   if (qs['file']) {
-    // load file
+    // start platform and load file
+    setupDebugControls();
+    platform.start();
     loadPreset(qs['file']);
     updateSelector();
+    return true;
   } else {
-    // try to load last file
+    // try to load last file (redirect)
     var lastid = localStorage.getItem("__lastid_"+platform_id) || localStorage.getItem("__lastid");
     localStorage.removeItem("__lastid");
     gotoPresetNamed(lastid || PRESETS[0].id);
+    return false;
   }
 }
 
diff --git a/src/worker/workermain.js b/src/worker/workermain.js
index 14f7519d..f826f918 100644
--- a/src/worker/workermain.js
+++ b/src/worker/workermain.js
@@ -71,17 +71,18 @@ var print_fn = function(s) {
 }
 
 // test.c(6) : warning 85: in function main unreferenced local variable : 'x'
-var re_msvc  = /(.*?)[(](\d+)[)]\s*:\s*(\w+)\s*(\d+):\s*(.*)/;
-var re_msvc2 = /\s*at\s+(\d+)\s*:\s*(.*)/;
+// main.a (4): error: Unknown Mnemonic 'xxx'.
+var re_msvc  = /([^(]+)\s*[(](\d+)[)]\s*:\s*(.+?):\s*(.*)/;
+var re_msvc2 = /\s*(at)\s+(\d+)\s*(:)\s*(.*)/;
 var msvc_errors;
 
 function match_msvc(s) {
   var matches = re_msvc.exec(s) || re_msvc2.exec(s);
   if (matches) {
-    var errline = parseInt(matches[1]);
+    var errline = parseInt(matches[2]);
     msvc_errors.push({
       line:errline,
-      msg:matches[2]
+      msg:matches[4]
     });
   }
 }
@@ -129,9 +130,8 @@ function parseSourceLines(code, lineMatch, offsetMatch) {
 }
 
 function parseDASMListing(code, unresolved) {
-  var errorMatch = /main.a [(](\d+)[)]: error: (.+)/;
   //        4  08ee		       a9 00	   start      lda	#01workermain.js:23:5
-  var lineMatch = /\s*(\d+)\s+(\S+)\s+([0-9a-f]+)\s+([0-9a-f][0-9a-f ]+)\s+(.+)/;
+  var lineMatch = /\s*(\d+)\s+(\S+)\s+([0-9a-f]+)\s+([0-9a-f][0-9a-f ]+)?\s+(.+)?/;
   var equMatch = /\bequ\b/;
   var errors = [];
   var lines = [];
@@ -157,7 +157,7 @@ function parseDASMListing(code, unresolved) {
         lastline = linenum;
       } else {
         // inside of macro or include file
-        if (linenum == -DASM_PREAMBLE_LINES) { // start of macro?
+        if (insns && linem[3] && lastline>0) {
           lines.push({
             line:lastline+1,
             offset:offset,
@@ -177,11 +177,11 @@ function parseDASMListing(code, unresolved) {
         }
       }
     }
-    var errm = errorMatch.exec(line);
+    var errm = re_msvc.exec(line);
     if (errm) {
       errors.push({
-        line:parseInt(errm[1]),
-        msg:errm[2]
+        line:parseInt(errm[2]),
+        msg:errm[4]
       })
     }
   }
@@ -204,9 +204,10 @@ function assembleDASM(code) {
   });
   var FS = Module['FS'];
   FS.writeFile(DASM_MAIN_FILENAME, DASM_PREAMBLE + code);
-  Module.callMain([DASM_MAIN_FILENAME, "-v3", "-la.lst"]);
+  Module.callMain([DASM_MAIN_FILENAME, "-la.lst"/*, "-v3", "-sa.sym"*/]);
   var aout = FS.readFile("a.out");
   var alst = FS.readFile("a.lst", {'encoding':'utf8'});
+  //var asym = FS.readFile("a.sym", {'encoding':'utf8'});
   var listing = parseDASMListing(alst, unresolved);
   return {
     output:aout.slice(2),
diff --git a/test/cli/worker.js b/test/cli/testworker.js
similarity index 81%
rename from test/cli/worker.js
rename to test/cli/testworker.js
index a4c56c7f..e468d872 100644
--- a/test/cli/worker.js
+++ b/test/cli/testworker.js
@@ -80,28 +80,43 @@ describe('Worker', function() {
   it('should assemble DASM', function(done) {
     compile('dasm', '\tprocessor 6502\n\torg $f000\nfoo lda #0\n', 'vcs', done, 2, 1);
   });
+  it('should NOT assemble DASM', function(done) {
+    compile('dasm', '\tprocessor 6502\n\torg $f000\nfoo xxx #0\n', 'vcs', done, 0, 0, 1);
+  });
   it('should assemble ACME', function(done) {
     compile('acme', 'foo: lda #0\n', 'vcs', done, 2, 0); // TODO
   });
+  it('should NOT assemble ACME', function(done) {
+    compile('acme', 'foo: xxx #0\n', 'vcs', done, 0, 0, 2); // TODO
+  });
   it('should compile PLASMA', function(done) {
     compile('plasm', 'word x = 0', 'apple2', done, 5, 0);
   });
+  it('should NOT compile PLASMA', function(done) {
+    compile('plasm', 'word x = ', 'apple2', done, 0, 0, 1);
+  });
   it('should compile CC65', function(done) {
     compile('cc65', '#include <stdio.h>\nint main() {\nint x=1;\nprintf("%d",x);\nreturn x+2;\n}', 'apple2', done, 2947, 4);
   });
-  it('should NOT assemble Z80ASM', function(done) {
-    compile('z80asm', 'ddwiuweq', 'none', done, 0, 0, 1);
+  it('should NOT compile CC65', function(done) {
+    compile('cc65', 'int main() {\nint x=1;\nprintf("%d",x);\nreturn x+2;\n}', 'apple2', done, 0, 0, 1);
   });
   it('should assemble Z80ASM', function(done) {
     compile('z80asm', '\tMODULE test\n\tXREF _puts\n\tld	hl,$0000\n\tret\n', 'spaceinv', done, 4, 2, 0);
   });
-  it('should NOT compile SDCC', function(done) {
-    compile('sdcc', 'foobar', 'spaceinv', done, 0, 0, 1);
+  it('should NOT assemble Z80ASM', function(done) {
+    compile('z80asm', 'ddwiuweq', 'none', done, 0, 0, 1);
   });
   it('should assemble SDASZ80', function(done) {
-    compile('sdcc', '\tMODULE test\n\tXREF _puts\n\tld	hl,$0000\n\tret\n', 'spaceinv', done, 8192, 2, 1);
+    compile('sdasz80', '\tld	hl,#0\n\tret\n', 'spaceinv', done, 8192, 2);
+  });
+  it('should NOT assemble SDASZ80', function(done) {
+    compile('sdasz80', '\txxx hl,#0\n\tret\n', 'spaceinv', done, 0, 0, 1);
   });
   it('should compile SDCC', function(done) {
     compile('sdcc', 'int foo=0;\nint main(int argc) {\nint x=1;\nint y=2+argc;\nreturn x+y+argc;\n}', 'spaceinv', done, 8192, 3, 0);
   });
+  it('should NOT compile SDCC', function(done) {
+    compile('sdcc', 'foobar', 'spaceinv', done, 0, 0, 1);
+  });
 });