diff --git a/src/platform/markdown.ts b/src/platform/markdown.ts
index 81d1c678..0bfba258 100644
--- a/src/platform/markdown.ts
+++ b/src/platform/markdown.ts
@@ -4,13 +4,16 @@ import { PLATFORMS } from "../common/emu";
 import { Platform } from "../common/baseplatform";
 
 class MarkdownPlatform implements Platform {
-  mainElement;
-  htmlDiv;
+  mainElement : HTMLElement;
+  iframe : HTMLIFrameElement;
 
   constructor(mainElement:HTMLElement) {
     this.mainElement = mainElement;
-    this.htmlDiv = $('<div class="markdown">').appendTo(mainElement);
-    $(mainElement).css('overflowY', 'auto');
+    this.iframe = $('<iframe sandbox seamless src="javascript:void(0);" width="100%" height="100%"/>').appendTo(mainElement)[0] as HTMLIFrameElement;
+    //this.iframe = $('<iframe sandbox src="res/markdown-iframe.html" width="100%" height="100%"/>').appendTo(mainElement)[0] as HTMLIFrameElement;
+    this.iframe.style.backgroundColor = 'white';
+    mainElement.classList.add("vertical-scroll"); //100% height
+    mainElement.style.overflowY = 'auto';
   }
   start() {
   }
@@ -20,8 +23,15 @@ class MarkdownPlatform implements Platform {
   }
   resume() {
   }
-  loadROM(title, data) {
-    this.htmlDiv.html(data);
+  loadROM(title, data:string) {
+    // have to do this b/c sandboxed without same origin
+    // TODO: preserve scroll position
+    if (this.iframe.srcdoc)
+      this.iframe.srcdoc = data;
+    else
+      this.iframe.src = "data:text/html;charset=utf-8," + escape(data);
+    //this.iframe.contentWindow.postMessage({body:data}, "*");
+    //$(this.iframe).contents().find('body').html(data);
   }
   isRunning() {
     return false;