diff --git a/.idea/markdown-navigator.xml b/.idea/markdown-navigator.xml
index d6df267..eb6dd25 100644
--- a/.idea/markdown-navigator.xml
+++ b/.idea/markdown-navigator.xml
@@ -12,7 +12,7 @@
   <component name="MarkdownProjectSettings">
     <PreviewSettings splitEditorLayout="SPLIT" splitEditorPreview="PREVIEW" useGrayscaleRendering="false" zoomFactor="1.0" maxImageWidth="0" synchronizePreviewPosition="true" highlightPreviewType="LINE" highlightFadeOut="5" highlightOnTyping="true" synchronizeSourcePosition="true" verticallyAlignSourceAndPreviewSyncPosition="true" showSearchHighlightsInPreview="true" showSelectionInPreview="true" lastLayoutSetsDefault="false">
       <PanelProvider>
-        <provider providerId="com.vladsch.idea.multimarkdown.editor.swing.html.panel" providerName="Default - Swing" />
+        <provider providerId="com.vladsch.md.nav.editor.javafx.html.panel" providerName="JavaFX WebView" />
       </PanelProvider>
     </PreviewSettings>
     <ParserSettings gitHubSyntaxChange="false" correctedInvalidSettings="false" emojiShortcuts="1" emojiImages="0">
@@ -36,7 +36,7 @@
     </ParserSettings>
     <HtmlSettings headerTopEnabled="false" headerBottomEnabled="false" bodyTopEnabled="false" bodyBottomEnabled="false" addPageHeader="false" imageUriSerials="false" addDocTypeHtml="true" noParaTags="false" plantUmlConversion="0">
       <GeneratorProvider>
-        <provider providerId="com.vladsch.idea.multimarkdown.editor.text.html.generator" providerName="Unmodified HTML Generator" />
+        <provider providerId="com.vladsch.md.nav.editor.javafx.html.generator" providerName="JavaFx HTML Generator" />
       </GeneratorProvider>
       <headerTop />
       <headerBottom />
@@ -45,9 +45,11 @@
     </HtmlSettings>
     <CssSettings previewScheme="UI_SCHEME" cssUri="" isCssUriEnabled="false" isCssUriSerial="true" isCssTextEnabled="false" isDynamicPageWidth="true">
       <StylesheetProvider>
-        <provider providerId="com.vladsch.idea.multimarkdown.editor.text.html.css" providerName="No Stylesheet" />
+        <provider providerId="com.vladsch.md.nav.editor.javafx.html.css" providerName="Default JavaFx Stylesheet" />
       </StylesheetProvider>
-      <ScriptProviders />
+      <ScriptProviders>
+        <provider providerId="com.vladsch.md.nav.editor.hljs.html.script" providerName="HighlightJS Script" />
+      </ScriptProviders>
       <cssText />
       <cssUriHistory />
     </CssSettings>
diff --git a/README.md b/README.md
index 8d4ec0a..eb21c82 100644
--- a/README.md
+++ b/README.md
@@ -11,18 +11,19 @@
 ![6502](https://upload.wikimedia.org/wikipedia/commons/thumb/4/43/KL_MOS_6502.jpg/320px-KL_MOS_6502.jpg)
 
 This is a Kotlin/JVM library that simulates the 8-bit 6502 and 65C02 microprocessors,
- which became very popular in the the early 1980's. 
+ which became very popular in the the early 1980's.
 
 Properties of this simulator:
 
 - Written in Kotlin. It is low-level code, but hopefully still readable :-)
-- Designed to simulate various hardware components (bus, cpu, memory, i/o controllers) 
+- Designed to simulate various hardware components (bus, cpu, memory, i/o controllers)
 - IRQ and NMI simulation
-- Aims to simulate correct instruction cycle timing, but is not 100% cycle exact for simplicity 
+- Aims to simulate correct instruction cycle timing, but is not 100% cycle exact for simplicity
 - Aims to implements all 6502 and 65c02 instructions, including the 'illegal' 6502 instructions (not yet done)
-- correct BCD mode for adc/sbc instructions on both cpu types   
+- correct BCD mode for adc/sbc instructions on both cpu types
 - passes several extensive unit test suites that verify instruction and cpu flags behavior
-- provide a few virtual example machines, one of which is a Commodore-64  
+- simple debugging machine monitor, which basic disassembler and assembler functions
+- provide a few virtual example machines, one of which is a Commodore-64
 
 
 ## Documentation
diff --git a/c64.png b/c64.png
index 281a829..2e8bd37 100644
Binary files a/c64.png and b/c64.png differ