diff --git a/css/ui.css b/css/ui.css
index 79a7e242..3ea22d41 100644
--- a/css/ui.css
+++ b/css/ui.css
@@ -274,3 +274,9 @@ canvas.pixelated {
 .twitter-follow-button:hover {
   color:#99ffff;
 }
+.dropdown-item-checked::before {
+  position: absolute;
+  left: .4rem;
+  content: '\2713';
+  font-weight: 400;
+}
diff --git a/doc/notes.txt b/doc/notes.txt
index 57d17b67..ee2c785e 100644
--- a/doc/notes.txt
+++ b/doc/notes.txt
@@ -46,7 +46,6 @@ TODO:
 - show tool-specific (readonly) include files
 - verilog debugging makes it slow
 - fix VCS mame
-- checkmarks for active window
 - remove FPS and play controls when Verilog scope paused
 
 
diff --git a/src/ui.ts b/src/ui.ts
index a0c9eaa1..e9d0f3b6 100644
--- a/src/ui.ts
+++ b/src/ui.ts
@@ -120,8 +120,10 @@ function refreshWindowList() {
     ul.append(li);
     if (createfn) {
       projectWindows.setCreateFunc(id, createfn);
-      $(a).click(function() {
+      $(a).click(function(e) {
         projectWindows.createOrShow(id);
+        ul.find('a').removeClass("dropdown-item-checked");
+        ul.find(e.target).addClass("dropdown-item-checked");
       });
     }
   }
@@ -194,7 +196,7 @@ function loadProject(preset_id:string) {
       // we need this to build create functions for the editor (TODO?)
       refreshWindowList();
       // show main file
-      projectWindows.createOrShow(preset_id);
+      projectWindows.createOrShow(preset_id); // TODO: add checkmark
     }
   });
 }
diff --git a/src/windows.ts b/src/windows.ts
index eafd21ed..74f8aa84 100644
--- a/src/windows.ts
+++ b/src/windows.ts
@@ -14,6 +14,7 @@ export class ProjectWindows {
   id2window : {[id:string]:ProjectView} = {};
   id2createfn : {[id:string]:WindowCreateFunction} = {};
   id2div : {[id:string]:HTMLElement} = {};
+  activeid : string;
   activewnd : ProjectView;
   activediv : HTMLElement;
   lasterrors : WorkerError[];
@@ -47,6 +48,7 @@ export class ProjectWindows {
       this.refresh();
       this.refreshErrors();
     }
+    this.activeid = id;
     return wnd;
   }
 
@@ -80,6 +82,8 @@ export class ProjectWindows {
   
   getActive() : ProjectView { return this.activewnd; }
   
+  getActiveID() : string { return this.activeid; }
+  
   getCurrentText() : string {
     if (this.activewnd && this.activewnd.getValue)
       return this.activewnd.getValue();
diff --git a/src/worker/workermain.js b/src/worker/workermain.js
index ac14c9d7..91c63909 100644
--- a/src/worker/workermain.js
+++ b/src/worker/workermain.js
@@ -1169,7 +1169,7 @@ function compileVerilator(step) {
     noInitialRun:true,
     print:print_fn,
     printErr:match_fn,
-    //TOTAL_MEMORY:64*1024*1024,
+    TOTAL_MEMORY:256*1024*1024,
   });
   var topmod = detectTopModuleName(code);
   var FS = verilator_mod['FS'];
diff --git a/test/cli/testworker.js b/test/cli/testworker.js
index 03355d0f..64b4b261 100644
--- a/test/cli/testworker.js
+++ b/test/cli/testworker.js
@@ -196,7 +196,7 @@ describe('Worker', function() {
       assert.ok(fn);
       done(err, msg);
     };
-    doBuild(msgs, done2, 253177, 0, 0);
+    doBuild(msgs, done2, 1996909, 0, 0);
   });
   it('should NOT preprocess SDCC', function(done) {
     compile('sdcc', 'int x=0\n#bah\n', 'mw8080bw', done, 0, 0, 1);