diff --git a/src/jkcemu/Main.java b/src/jkcemu/Main.java
index fd1116f..9bb5577 100644
--- a/src/jkcemu/Main.java
+++ b/src/jkcemu/Main.java
@@ -1,5 +1,5 @@
 /*
- * (c) 2008-2021 Jens Mueller
+ * (c) 2008-2022 Jens Mueller
  *
  * Kleincomputer-Emulator
  *
@@ -65,9 +65,9 @@
 public class Main
 {
   public static final String APPNAME   = "JKCEMU";
-  public static final String VERSION   = "0.9.8.1";
+  public static final String VERSION   = "0.9.8.2";
   public static final String APPINFO   = APPNAME + " Version " + VERSION;
-  public static final String COPYRIGHT = "(c) 2008-2021 Jens M\u00FCller";
+  public static final String COPYRIGHT = "(c) 2008-2022 Jens M\u00FCller";
 
   public static final String FILE_GROUP_AUDIO       = "audio";
   public static final String FILE_GROUP_DEBUG_BREAK = "debug.breakpoints";
diff --git a/src/jkcemu/audio/AudioFrm.java b/src/jkcemu/audio/AudioFrm.java
index d5ea23b..ef6c460 100644
--- a/src/jkcemu/audio/AudioFrm.java
+++ b/src/jkcemu/audio/AudioFrm.java
@@ -201,7 +201,11 @@ public static AudioFrm open( ScreenFrm screenFrm )
 
   public void openFile( File file, byte[] fileBytes, int offs )
   {
-    this.tabTapeIn.openFile( file, fileBytes, offs );
+    int idx = this.tabbedPane.indexOfComponent( this.tabTapeIn );
+    if( idx >= 0 ) {
+      fireSelectTab( idx );
+      this.tabTapeIn.openFile( file, fileBytes, offs );
+    }
   }
 
 
@@ -358,18 +362,7 @@ public void resetFired( EmuSys newEmuSys, Properties newProps )
       // Fenstergroesse anpassen oder Fenster schliessen
       if( nTabs > 0 ) {
 	pack();
-	if( idxToSelect >= 0 ) {
-	  final int idx = idxToSelect;
-	  EventQueue.invokeLater(
-			new Runnable()
-			{
-			  @Override
-			  public void run()
-			  {
-			    selectTab( idx );
-			  }
-			} );
-	}
+	fireSelectTab( idxToSelect );
       } else {
 	doClose();
       }
@@ -408,6 +401,22 @@ private void enableAudio(
   }
 
 
+  private void fireSelectTab( final int idx )
+  {
+    if( idx >= 0 ) {
+      EventQueue.invokeLater(
+			new Runnable()
+			{
+			  @Override
+			  public void run()
+			  {
+			    selectTab( idx );
+			  }
+			} );
+    }
+  }
+
+
   private void selectTab( int idx )
   {
     if( (idx >= 0) && (idx < this.tabbedPane.getTabCount()) ) {
diff --git a/src/jkcemu/audio/TapeInFld.java b/src/jkcemu/audio/TapeInFld.java
index 57e904f..55b25a6 100644
--- a/src/jkcemu/audio/TapeInFld.java
+++ b/src/jkcemu/audio/TapeInFld.java
@@ -403,21 +403,27 @@ public boolean checkEnableAudio( Properties props )
   public void openFile( File file, byte[] fileBytes, int offs )
   {
     if( (file != null) || (fileBytes != null) ) {
-      EmuSys emuSys = this.emuThread.getEmuSys();
-      if( (emuSys != null) && (getTapeIn() == null) ) {
-	if( emuSys.supportsTapeIn() ) {
-	  int speedKHz = this.audioFrm.getAndCheckSpeed();
-	  if( speedKHz > 0 ) {
-	    this.rbFromFile.setSelected( true );
-	    try {
+      try {
+	if( getTapeIn() != null ) {
+	  throw new IOException( "Die Audiofunktion \'Eingang Kassette\'"
+		+ " ist bereits aktiv.\n"
+		+ "Diese m\u00FCssen Sie zuerst deaktivieren,\n"
+		+ "bevor Sie eine neue Datei \u00F6ffnen k\u00F6nnen." );
+	}
+	EmuSys emuSys = this.emuThread.getEmuSys();
+	if( emuSys != null ) {
+	  if( emuSys.supportsTapeIn() ) {
+	    int speedKHz = this.audioFrm.getAndCheckSpeed();
+	    if( speedKHz > 0 ) {
+	      this.rbFromFile.setSelected( true );
 	      enableFile( speedKHz, file, fileBytes, offs );
 	    }
-	    catch( IOException ex ) {
-	      BaseDlg.showErrorDlg( this, ex );
-	    }
 	  }
 	}
       }
+      catch( IOException ex ) {
+	BaseDlg.showErrorDlg( this, ex );
+      }
     }
   }
 
@@ -748,12 +754,13 @@ public void updFieldsEnabled()
     boolean pause      = false;
     boolean progress   = false;
     String  formatText = null;
+    AudioIn audioIn    = null;
     File    file       = this.fldFile.getFile();
     EmuSys  emuSys     = this.emuThread.getEmuSys();
     if( emuSys != null ) {
+      audioIn   = emuSys.getTapeIn();
       supported = emuSys.supportsTapeIn();
     }
-    AudioIn audioIn = getTapeIn();
     if( audioIn != null ) {
       running  = true;
       fromLine = (audioIn instanceof AudioInLine);
@@ -928,7 +935,8 @@ private boolean enableLine() throws IOException
 
   private AudioIn getTapeIn()
   {
-    return emuThread.getEmuSys().getTapeIn();
+    EmuSys emuSys = this.emuThread.getEmuSys();
+    return emuSys != null ? emuSys.getTapeIn() : null;
   }
 
 
diff --git a/src/jkcemu/base/TabTitleFld.java b/src/jkcemu/base/TabTitleFld.java
index ceb0927..69bba76 100644
--- a/src/jkcemu/base/TabTitleFld.java
+++ b/src/jkcemu/base/TabTitleFld.java
@@ -1,5 +1,5 @@
 /*
- * (c) 2019-2020 Jens Mueller
+ * (c) 2019-2022 Jens Mueller
  *
  * Kleincomputer-Emulator
  *
@@ -15,7 +15,6 @@
 import java.awt.Insets;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
-import javax.swing.JButton;
 import javax.swing.JLabel;
 import javax.swing.JPanel;
 import javax.swing.JTabbedPane;
diff --git a/src/jkcemu/emusys/KC85.java b/src/jkcemu/emusys/KC85.java
index 8f7d5a4..4c5c2e1 100644
--- a/src/jkcemu/emusys/KC85.java
+++ b/src/jkcemu/emusys/KC85.java
@@ -1,5 +1,5 @@
 /*
- * (c) 2008-2021 Jens Mueller
+ * (c) 2008-2022 Jens Mueller
  *
  * Kleincomputer-Emulator
  *
@@ -128,7 +128,7 @@ public class KC85 extends EmuSys implements
   public static final String VALUE_D004   = "D004";
   public static final String VALUE_D008   = "D008";
   public static final String VALUE_ROM_20 = "2.0";
-  public static final String VALUE_ROM_33 = "3.3";
+  public static final String VALUE_ROM_35 = "3.5";
 
   public static final boolean DEFAULT_SWAP_KEY_CHAR_CASE              = true;
   public static final int     DEFAULT_PROMPT_AFTER_RESET_MILLIS_MAX_2 = 5000;
diff --git a/src/jkcemu/emusys/kc85/D004.java b/src/jkcemu/emusys/kc85/D004.java
index 9c14af9..382c87a 100644
--- a/src/jkcemu/emusys/kc85/D004.java
+++ b/src/jkcemu/emusys/kc85/D004.java
@@ -1,5 +1,5 @@
 /*
- * (c) 2009-2021 Jens Mueller
+ * (c) 2009-2022 Jens Mueller
  *
  * Kleincomputer-Emulator
  *
@@ -30,9 +30,9 @@ public class D004 extends AbstractKC85Module
 
   private static final String TEXT_D004_ROM_FILE = "D004-ROM-Datei";
 
-  private static byte[] romD004_20    = null;
-  private static byte[] romD004_331_2 = null;
-  private static byte[] romD004_331_4 = null;
+  private static byte[] romD004_20   = null;
+  private static byte[] romD004_35_2 = null;
+  private static byte[] romD004_35_4 = null;
 
   private volatile boolean connected;
   private boolean          cpuEnableValue;
@@ -175,15 +175,15 @@ protected byte[] loadROM( KC85 kc85 )
     if( romBytes == null ) {
       if( this.romProp.equals( KC85.VALUE_ROM_20 ) ) {
 	romBytes = getROMBytes20();
-      } else if( this.romProp.equals( KC85.VALUE_ROM_33 ) ) {
+      } else if( this.romProp.equals( KC85.VALUE_ROM_35 ) ) {
 	if( kc85.getKCTypeNum() >= 4 ) {
-	  romBytes = getROMBytes331_4();
+	  romBytes = getROMBytes35_4();
 	} else {
-	  romBytes = getROMBytes331_2();
+	  romBytes = getROMBytes35_2();
 	}
       } else {
 	if( kc85.getKCTypeNum() >= 4 ) {
-	  romBytes = getROMBytes331_4();
+	  romBytes = getROMBytes35_4();
 	} else {
 	  romBytes = getROMBytes20();
 	}
@@ -247,10 +247,16 @@ public int getTypeByte()
   public int readMemByte( int addr )
   {
     int rv = -1;
-    if( this.enabled && (this.romBytes != null) ) {
-      int idx = addr - this.romAddr;
-      if( (idx >= 0) && (idx < this.romBytes.length) ) {
-	rv = (int) this.romBytes[ idx ] & 0xFF;
+    if( this.enabled
+	&& (addr >= this.romAddr)
+	&& (addr < (this.romAddr + 0x2000)) )
+    {
+      rv = 0xFF;
+      if( this.romBytes != null ) {
+	int idx = addr - this.romAddr;
+	if( (idx >= 0) && (idx < this.romBytes.length) ) {
+	  rv = (int) this.romBytes[ idx ] & 0xFF;
+	}
       }
     }
     return rv;
@@ -389,24 +395,24 @@ private byte[] getROMBytes20()
   }
 
 
-  private byte[] getROMBytes331_2()
+  private byte[] getROMBytes35_2()
   {
-    if( romD004_331_2 == null ) {
-      romD004_331_2 = EmuUtil.readResource(
+    if( romD004_35_2 == null ) {
+      romD004_35_2 = EmuUtil.readResource(
 				this.kc85.getScreenFrm(),
-				"/rom/kc85/d004_331_2.bin" );
+				"/rom/kc85/d004_35_2.bin" );
     }
-    return romD004_331_2;
+    return romD004_35_2;
   }
 
 
-  private byte[] getROMBytes331_4()
+  private byte[] getROMBytes35_4()
   {
-    if( romD004_331_4 == null ) {
-      romD004_331_4 = EmuUtil.readResource(
+    if( romD004_35_4 == null ) {
+      romD004_35_4 = EmuUtil.readResource(
 				this.kc85.getScreenFrm(),
-				"/rom/kc85/d004_331_4.bin" );
+				"/rom/kc85/d004_35_4.bin" );
     }
-    return romD004_331_4;
+    return romD004_35_4;
   }
 }
diff --git a/src/jkcemu/emusys/kc85/D008.java b/src/jkcemu/emusys/kc85/D008.java
index cd0be29..51ce344 100644
--- a/src/jkcemu/emusys/kc85/D008.java
+++ b/src/jkcemu/emusys/kc85/D008.java
@@ -1,5 +1,5 @@
 /*
- * (c) 2018-2021 Jens Mueller
+ * (c) 2018-2022 Jens Mueller
  *
  * Kleincomputer-Emulator
  *
@@ -132,10 +132,16 @@ protected byte[] loadROM( KC85 kc85 )
   public int readMemByte( int addr )
   {
     int rv = -1;
-    if( this.enabled && (this.romBytes != null) ) {
-      int idx = (this.romBank * 0x2000) + addr - this.romAddr;
-      if( (idx >= 0) && (idx < this.romBytes.length) ) {
-	rv = (int) this.romBytes[ idx ] & 0xFF;
+    if( this.enabled
+	&& (addr >= this.romAddr)
+	&& (addr < (this.romAddr + 0x2000)) )
+    {
+      rv = 0xFF;
+      if( this.romBytes != null ) {
+	int idx = (this.romBank * 0x2000) + addr - this.romAddr;
+	if( (idx >= 0) && (idx < this.romBytes.length) ) {
+	  rv = (int) this.romBytes[ idx ] & 0xFF;
+	}
       }
     }
     return rv;
diff --git a/src/jkcemu/emusys/kc85/KC85SettingsFld.java b/src/jkcemu/emusys/kc85/KC85SettingsFld.java
index 8aa6117..5816d07 100644
--- a/src/jkcemu/emusys/kc85/KC85SettingsFld.java
+++ b/src/jkcemu/emusys/kc85/KC85SettingsFld.java
@@ -1,5 +1,5 @@
 /*
- * (c) 2010-2021 Jens Mueller
+ * (c) 2010-2022 Jens Mueller
  *
  * Kleincomputer-Emulator
  *
@@ -186,7 +186,7 @@ public class KC85SettingsFld
   private JButton              btnModuleDown;
   private JRadioButton         rbDiskStationNone;
   private JRadioButton         rbDiskStationD004_20;
-  private JRadioButton         rbDiskStationD004_33;
+  private JRadioButton         rbDiskStationD004_35;
   private JRadioButton         rbDiskStationD008;
   private JLabel               labelDiskStationRom;
   private JLabel               labelDiskStationSpeed;
@@ -403,14 +403,14 @@ public KC85SettingsFld(
     gbcDiskStation.gridy++;
     this.tabDiskStation.add( this.rbDiskStationD004_20, gbcDiskStation );
 
-    this.rbDiskStationD004_33 = GUIFactory.createRadioButton(
-		"Floppy-Disk-Erweiterung D004 mit ROM-Version 3.31"
+    this.rbDiskStationD004_35 = GUIFactory.createRadioButton(
+		"Floppy-Disk-Erweiterung D004 mit ROM-Version 3.5"
 					+ " (optional mit GIDE)" );
-    grpDiskStation.add( this.rbDiskStationD004_33 );
-    this.rbDiskStationD004_33.addActionListener( this );
+    grpDiskStation.add( this.rbDiskStationD004_35 );
+    this.rbDiskStationD004_35.addActionListener( this );
     gbcDiskStation.insets.top = 0;
     gbcDiskStation.gridy++;
-    this.tabDiskStation.add( this.rbDiskStationD004_33, gbcDiskStation );
+    this.tabDiskStation.add( this.rbDiskStationD004_35, gbcDiskStation );
 
     this.rbDiskStationD008 = GUIFactory.createRadioButton(
 		"Floppy-Disk-Erweiterung D008 (immer mit GIDE)" );
@@ -806,9 +806,9 @@ public void applyInput(
       if( this.rbDiskStationD004_20.isSelected() ) {
 	diskStation    = KC85.VALUE_D004;
 	diskStationRom = KC85.VALUE_ROM_20;
-      } else if( this.rbDiskStationD004_33.isSelected() ) {
+      } else if( this.rbDiskStationD004_35.isSelected() ) {
 	diskStation    = KC85.VALUE_D004;
-	diskStationRom = KC85.VALUE_ROM_33;
+	diskStationRom = KC85.VALUE_ROM_35;
       } else if( this.rbDiskStationD008.isSelected() ) {
 	diskStation = KC85.VALUE_D008;
       }
@@ -917,7 +917,7 @@ protected boolean doAction( EventObject e )
 	doModuleIntoDiskStation();
       } else if( (src == this.rbDiskStationNone)
 	       || (src == this.rbDiskStationD004_20)
-	       || (src == this.rbDiskStationD004_33)
+	       || (src == this.rbDiskStationD004_35)
 	       || (src == this.rbDiskStationD008)
 	       || (src == this.rbDiskStationSpeedDefault)
 	       || (src == this.rbDiskStationSpeed8MHz)
@@ -1100,7 +1100,7 @@ else if( romType.toLowerCase().startsWith( KC85.VALUE_PREFIX_FILE ) ) {
 	if( diskStationRom20 ) {
 	  this.rbDiskStationD004_20.setSelected( true );
 	} else {
-	  this.rbDiskStationD004_33.setSelected( true );
+	  this.rbDiskStationD004_35.setSelected( true );
 	}
 	break;
       case KC85.VALUE_D008:
@@ -1548,7 +1548,7 @@ private int getSelectedModuleModelRow()
   private boolean isDiskStationEnabled()
   {
     return this.rbDiskStationD004_20.isSelected()
-			|| this.rbDiskStationD004_33.isSelected()
+			|| this.rbDiskStationD004_35.isSelected()
 			|| this.rbDiskStationD008.isSelected();
   }
 
@@ -1646,7 +1646,7 @@ private void showModuleChangePopup( Component c, int x, int y )
   private void updDiskStationFieldsEnabled()
   {
     boolean d4_20 = this.rbDiskStationD004_20.isSelected();
-    boolean d4_33 = this.rbDiskStationD004_33.isSelected();
+    boolean d4_33 = this.rbDiskStationD004_35.isSelected();
     boolean state = (d4_20 || d4_33 || this.rbDiskStationD008.isSelected());
     this.tabGIDE.setEnabledEx( state, d4_20 || d4_33 );
     this.labelDiskStationRom.setEnabled( state );
diff --git a/src/jkcemu/etc/ChessboardFrm.java b/src/jkcemu/etc/ChessboardFrm.java
index 77e8425..957ad93 100644
--- a/src/jkcemu/etc/ChessboardFrm.java
+++ b/src/jkcemu/etc/ChessboardFrm.java
@@ -1,5 +1,5 @@
 /*
- * (c) 2009-2020 Jens Mueller
+ * (c) 2009-2022 Jens Mueller
  *
  * Kleincomputer-Emulator
  *
@@ -161,9 +161,9 @@ private ChessboardFrm( EmuThread emuThread )
 
 
     // Fenstergroesse
+    pack();
     setResizable( false );
     if( !applySettings( Main.getProperties() ) ) {
-      pack();
       setLocationByPlatform( true );
     }
   }
diff --git a/src/jkcemu/file/FileActionMngr.java b/src/jkcemu/file/FileActionMngr.java
index 4706c80..92dfd2c 100644
--- a/src/jkcemu/file/FileActionMngr.java
+++ b/src/jkcemu/file/FileActionMngr.java
@@ -52,6 +52,7 @@
 import jkcemu.image.ImageFrm;
 import jkcemu.text.TextEditFrm;
 import jkcemu.tools.FileChecksumFrm;
+import jkcemu.tools.filebrowser.FileBrowserFrm;
 import jkcemu.tools.fileconverter.FileConvertFrm;
 import jkcemu.tools.findfiles.FindFilesFrm;
 import jkcemu.tools.hexdiff.HexDiffFrm;
@@ -414,14 +415,12 @@ public void addFileMenuItemsTo( JPopupMenu popup, JMenu menu )
 		menu );
     addSeparator( popup, menu );
 
-    if( DesktopHelper.isOpenSupported() ) {
-      addJMenuItem(
+    addJMenuItem(
 		"Mit zugeh\u00F6rigem Programm \u00F6ffnen...",
 		ACTION_OPEN_EXTERNAL,
 		popup,
 		menu );
-      addSeparator( popup, menu );
-    }
+    addSeparator( popup, menu );
 
     addJMenuItem(
 		"Pr\u00FCfsumme/Hashwert berechnen...",
@@ -633,6 +632,7 @@ public boolean doFileAction( FileObject fObj ) throws IOException
 	  }
 	  if( !done && DesktopHelper.isOpenSupported() ) {
 	    openExternal( file );
+	    done = true;
 	  }
 	}
       }
@@ -966,6 +966,11 @@ private void doFileDelete(
   {
     java.util.List<Path> paths = getPaths( files );
     if( !paths.isEmpty() ) {
+      /*
+       * Detailansicht des Datei-Browsers leeren,
+       * um eventuelle Dateisperren aufzuheben.
+       */
+      FileBrowserFrm.clearPreview();
       FileRemover.startRemove(
 			this.owner,
 			paths,
@@ -1012,13 +1017,13 @@ private void doFileEditText(
   private void doFileOpenExternal(
 		java.util.List<FileActionMngr.FileObject> files )
   {
+    boolean done = false;
     if( DesktopHelper.isOpenSupported() ) {
-      File file = getFile( files, false );
-      if( file != null ) {
-	if( file.isFile() || file.isDirectory() ) {
-	  openExternal( file );
-	}
-      }
+      openExternal( getFile( files, false ) );
+    } else {
+      BaseDlg.showErrorDlg(
+		this.owner,
+		"Funktion auf diesem System nicht unterst\u00FCtzt." );
     }
   }
 
@@ -1874,17 +1879,17 @@ private java.util.List<Path> getPaths(
 
   private void openExternal( File file )
   {
-    if( file.canRead() ) {
+    if( file != null ) {
       try {
+	if( !file.canRead() ) {
+	  throw new IOException( 
+		"Datei/Verzeichnis kann nicht gelesen werden." );
+	}
 	DesktopHelper.open( file );
       }
       catch( IOException ex ) {
 	BaseDlg.showErrorDlg( this.owner, ex );
       }
-    } else {
-      BaseDlg.showErrorDlg(
-		this.owner,
-		"Datei/Verzeichnis kann nicht gelesen werden." );
     }
   }
 
diff --git a/src/jkcemu/tools/filebrowser/FileBrowserFrm.java b/src/jkcemu/tools/filebrowser/FileBrowserFrm.java
index ef46317..3eb6a88 100644
--- a/src/jkcemu/tools/filebrowser/FileBrowserFrm.java
+++ b/src/jkcemu/tools/filebrowser/FileBrowserFrm.java
@@ -220,6 +220,13 @@ public class FileBrowserFrm
   private boolean                     pasteState;
 
 
+  public static void clearPreview()
+  {
+    if( instance != null )
+      instance.setPreviewedFileNode( null );
+  }
+
+
   public static FileBrowserFrm open( ScreenFrm screenFrm )
   {
     if( instance != null ) {
diff --git a/src/jkcemu/tools/filebrowser/FilePreviewFld.java b/src/jkcemu/tools/filebrowser/FilePreviewFld.java
index fb7e329..e199af3 100644
--- a/src/jkcemu/tools/filebrowser/FilePreviewFld.java
+++ b/src/jkcemu/tools/filebrowser/FilePreviewFld.java
@@ -259,6 +259,7 @@ public void run()
 	  }
 	}
 	if( fileChanged && (this.thread != null) ) {
+	  this.imageCard.setImage( null );
 	  String cardName = null;
 
 	  // Datei auswerten
diff --git a/src/jkcemu/tools/filebrowser/ImageCard.java b/src/jkcemu/tools/filebrowser/ImageCard.java
index 96cc8f8..dd0a23f 100644
--- a/src/jkcemu/tools/filebrowser/ImageCard.java
+++ b/src/jkcemu/tools/filebrowser/ImageCard.java
@@ -1,5 +1,5 @@
 /*
- * (c) 2008-2020 Jens Mueller
+ * (c) 2008-2021 Jens Mueller
  *
  * Kleincomputer-Emulator
  *
@@ -18,6 +18,7 @@
 package jkcemu.tools.filebrowser;
 
 import java.awt.Component;
+import java.awt.EventQueue;
 import java.awt.Graphics;
 import java.awt.Image;
 import java.util.Stack;
@@ -48,17 +49,24 @@ public ImageCard()
   public void setImage( Image image )
   {
     synchronized( this.forFlushing ) {
-      if( this.orgImage != null ) {
-	if( image != this.orgImage ) {
-	  /*
-	   * Image.flush() nur im Event-Thread aufrufen,
-	   * d.h. in der paint-Methode
-	   */
-	  this.forFlushing.push( this.orgImage );
-	  if( this.scaledImage != null ) {
-	    this.forFlushing.push( this.scaledImage );
-	  }
+      if( (this.orgImage != null) && (image != this.orgImage) ) {
+	/*
+	 * Image.flush() nur im Event-Thread aufrufen,
+	 * d.h. in der paint-Methode
+	 */
+	this.forFlushing.push( this.orgImage );
+	if( this.scaledImage != null ) {
+	  this.forFlushing.push( this.scaledImage );
 	}
+	EventQueue.invokeLater(
+			new Runnable()
+			{
+			  @Override
+			  public void run()
+			  {
+			    flushImages();
+			  }
+			} );
       }
       this.orgImage    = image;
       this.scaledImage = null;
@@ -72,11 +80,6 @@ public void setImage( Image image )
   @Override
   public void paint( Graphics g )
   {
-    synchronized( this.forFlushing ) {
-      while( !this.forFlushing.empty() ) {
-	this.forFlushing.pop().flush();
-      }
-    }
     Image image = this.orgImage;
     if( image != null ) {
       int   w     = getWidth();
@@ -101,7 +104,7 @@ public void paint( Graphics g )
 	    if( (this.scaledImage == null) && (wImg > 0) && (hImg > 0) ) {
 	      this.scaledW     = wImg;
 	      this.scaledH     = hImg;
-	      this.scaledImage = this.orgImage.getScaledInstance(
+	      this.scaledImage = image.getScaledInstance(
 						wImg,
 						hImg,
 						Image.SCALE_SMOOTH );
@@ -115,4 +118,16 @@ public void paint( Graphics g )
       }
     }
   }
+
+
+	/* --- private Methoden --- */
+
+  private void flushImages()
+  {
+    synchronized( this.forFlushing ) {
+      while( !this.forFlushing.empty() ) {
+	this.forFlushing.pop().flush();
+      }
+    }
+  }
 }
diff --git a/src/rom/kc85/caos48_c000.bin b/src/rom/kc85/caos48_c000.bin
index 386c479..d56d412 100644
Binary files a/src/rom/kc85/caos48_c000.bin and b/src/rom/kc85/caos48_c000.bin differ
diff --git a/src/rom/kc85/caos48_e000.bin b/src/rom/kc85/caos48_e000.bin
index ef74c52..5ad7f7f 100644
Binary files a/src/rom/kc85/caos48_e000.bin and b/src/rom/kc85/caos48_e000.bin differ
diff --git a/src/rom/kc85/d004_331_2.bin b/src/rom/kc85/d004_35_2.bin
similarity index 68%
rename from src/rom/kc85/d004_331_2.bin
rename to src/rom/kc85/d004_35_2.bin
index 3a59805..b5253e4 100644
Binary files a/src/rom/kc85/d004_331_2.bin and b/src/rom/kc85/d004_35_2.bin differ
diff --git a/src/rom/kc85/d004_331_4.bin b/src/rom/kc85/d004_35_4.bin
similarity index 67%
rename from src/rom/kc85/d004_331_4.bin
rename to src/rom/kc85/d004_35_4.bin
index c18b380..1087251 100644
Binary files a/src/rom/kc85/d004_331_4.bin and b/src/rom/kc85/d004_35_4.bin differ
diff --git a/src/rom/kc85/d008.bin b/src/rom/kc85/d008.bin
index 38fc9e7..be9b0cb 100644
Binary files a/src/rom/kc85/d008.bin and b/src/rom/kc85/d008.bin differ
diff --git a/src/z80emu/Z80CPU.java b/src/z80emu/Z80CPU.java
index 740230f..7ba7edc 100644
--- a/src/z80emu/Z80CPU.java
+++ b/src/z80emu/Z80CPU.java
@@ -1,5 +1,5 @@
 /*
- * (c) 2008-2021 Jens Mueller
+ * (c) 2008-2022 Jens Mueller
  *
  * Z80-Emulator
  *
@@ -138,7 +138,7 @@ public Z80CPU( Z80Memory memory, Z80IOSystem ioSys )
     this.pcListener            = null;
     this.addrListener          = null;
     this.tStatesListeners      = null;
-    this.interruptSources      = new Z80InterruptSource[ 0 ];
+    this.interruptSources      = null;
     this.haltStateListeners    = new ArrayList<>();
     this.maxSpeedListeners     = new ArrayList<>();
     this.statusListeners       = new ArrayList<>();
@@ -1183,7 +1183,7 @@ public void run()
 	    if( this.lastInstWasEIorDI ) {
 	      this.lastInstWasEIorDI = false;
 	    } else {
-	      if( this.iff1 ) {
+	      if( this.iff1 && (this.interruptSources != null) ) {
 		for( Z80InterruptSource iSource : this.interruptSources ) {
 		  if( iSource.isInterruptAccepted() ) {
 		    break;
@@ -3204,9 +3204,11 @@ private void execED_40to4F( int opCode )
 	break;
       case 0x4D:				// RETI
 	doInstRETN();
-	for( Z80InterruptSource iSource : this.interruptSources ) {
-	  if( iSource.interruptFinish( this.instBegPC ) ) {
-	    break;
+	if( this.interruptSources != null ) {
+	  for( Z80InterruptSource iSource : this.interruptSources ) {
+	    if( iSource.interruptFinish( this.instBegPC ) ) {
+	      break;
+	    }
 	  }
 	}
 	this.instTStates += 14;