diff --git a/src/ui/viewers/charsetviewer.cpp b/src/ui/viewers/charsetviewer.cpp
index cb720e6..305c31b 100644
--- a/src/ui/viewers/charsetviewer.cpp
+++ b/src/ui/viewers/charsetviewer.cpp
@@ -7,6 +7,7 @@
 CharSetViewer::CharSetViewer(QWidget *parent) : FileViewerInterface(parent)
 {
     m_file = Q_NULLPTR;
+    m_cse = Q_NULLPTR;
 
     QGridLayout *qgl = new QGridLayout(this);
     setLayout(qgl);
@@ -14,6 +15,10 @@ CharSetViewer::CharSetViewer(QWidget *parent) : FileViewerInterface(parent)
     setWindowTitle(title);
 }
 
+CharSetViewer::~CharSetViewer()
+{
+}
+
 void CharSetViewer::setFile(GenericFile *file)
 {
     if (dynamic_cast<BinaryFile*>(file))
@@ -73,9 +78,30 @@ bool CharSetViewer::optionsMenuItems(QMenu *menu)
     connect(action, SIGNAL(toggled(bool)),SLOT(enableBitShift(bool)));
     menu->addAction(action);
 
+    menu->addSeparator();
+
+    action = new QAction("&Character Set Explorer...");
+    connect(action, SIGNAL(triggered(bool)), SLOT(showExplorer()));
+    menu->addAction(action);
+
     return true;
 }
 
+void CharSetViewer::showExplorer()
+{
+    if (!m_cse) {
+        m_cse = new CharacterSetExplorer(this);
+        connect(m_cse, SIGNAL(destroyed(QObject*)), SLOT(cleanupExplorer()));
+        m_cse->setCharSet(m_charset);
+    }
+    m_cse->show();
+    m_cse->raise();
+}
+
+void CharSetViewer::cleanupExplorer()
+{
+    m_cse = Q_NULLPTR;
+}
 
 QList<CharacterWidget *> CharSetViewer::getChildren()
 {
diff --git a/src/ui/viewers/charsetviewer.h b/src/ui/viewers/charsetviewer.h
index 3674afa..7b65411 100644
--- a/src/ui/viewers/charsetviewer.h
+++ b/src/ui/viewers/charsetviewer.h
@@ -4,6 +4,7 @@
 #include "binaryfile.h"
 #include "characterwidget.h"
 #include "fileviewerinterface.h"
+#include "CharacterSetExplorer.h"
 
 #include <QWidget>
 
@@ -12,6 +13,7 @@ class CharSetViewer : public FileViewerInterface
     Q_OBJECT
 public:
     explicit CharSetViewer(QWidget *parent = 0);
+    virtual ~CharSetViewer();
 
     void setFile(GenericFile *file);
     void setFile(BinaryFile *file);
@@ -26,12 +28,16 @@ public slots:
     void showGrid(bool show);
     void enableBitShift(bool enable);
 
+    void showExplorer();
 
 signals:
 
 protected:
     QList<CharacterWidget*> getChildren();
 
+protected slots:
+    void cleanupExplorer();
+
 private:
     BinaryFile *m_file;
 
@@ -39,6 +45,7 @@ private:
 
     CharacterSet m_charset;
 
+    CharacterSetExplorer *m_cse;
 };
 
 #endif // CHARSETVIEWER_H
diff --git a/src/ui/widgets/CharacterSetExplorer.cpp b/src/ui/widgets/CharacterSetExplorer.cpp
index 52fcffe..c175231 100644
--- a/src/ui/widgets/CharacterSetExplorer.cpp
+++ b/src/ui/widgets/CharacterSetExplorer.cpp
@@ -5,10 +5,82 @@ CharacterSetExplorer::CharacterSetExplorer(QWidget *parent) :
     QDialog(parent),
     ui(new Ui::CharacterSetExplorer)
 {
+    m_unpackedScreen.fill(0,8192);
     ui->setupUi(this);
+    connect(ui->drawButton, SIGNAL(clicked(bool)), SLOT(handleDrawButton()));
+    connect(ui->insertChar, SIGNAL(clicked(bool)), SLOT(handleInsertCharButton()));
+    connect(ui->inputText, SIGNAL(textChanged(QString)), SLOT(handleTextChanged(QString)));
+}
+
+void CharacterSetExplorer::setCharSet(CharacterSet &charset)
+{
+    m_charset = charset;
 }
 
 CharacterSetExplorer::~CharacterSetExplorer()
 {
     delete ui;
 }
+
+void CharacterSetExplorer::handleDrawButton()
+{
+    handleTextChanged(ui->inputText->text());
+}
+
+void CharacterSetExplorer::handleInsertCharButton()
+{
+
+}
+
+void CharacterSetExplorer::handleTextChanged(QString string)
+{
+    int currCursorX = 0;
+    int currCursorY = 0;
+    m_unpackedScreen.fill(0x00,8192);
+
+    foreach (QChar character, string)
+    {
+        if (character.unicode() < 128)
+        {
+            if (character.unicode() < 32)
+            {
+                // Handle control character
+            }
+            else
+            {
+                // Handle ASCII value
+                if (m_charset.contains(character.unicode()))
+                {
+                    QByteArray chardata = m_charset[character.unicode()].data();
+
+                    for (int idx = 0; idx < 8; idx++)
+                    {
+                        int baseY = (currCursorY * 8 + idx) * 40;
+                        quint8 chr = chardata[idx];
+                        m_unpackedScreen[baseY + currCursorX] = chr;
+                    }
+                    currCursorX++;
+
+                    if (currCursorX >= 40) {
+                        currCursorY++;
+                        currCursorX = 0;
+                    }
+                    if (currCursorY >= 24)
+                    {
+                        currCursorX = 0;
+                        currCursorY = 0;
+                    }
+                }
+                else
+                {
+                    qDebug() << "Character" << character.unicode() << "not defined in char set";
+                }
+            }
+        }
+        else
+        {
+            qDebug() << "Unhandled character: " << character.unicode();
+        }
+    }
+    ui->drawWidget->setUnpackedData(m_unpackedScreen);
+}
diff --git a/src/ui/widgets/CharacterSetExplorer.h b/src/ui/widgets/CharacterSetExplorer.h
index 4b52663..6911847 100644
--- a/src/ui/widgets/CharacterSetExplorer.h
+++ b/src/ui/widgets/CharacterSetExplorer.h
@@ -3,6 +3,8 @@
 
 #include <QDialog>
 
+#include "charset.h"
+
 namespace Ui {
 class CharacterSetExplorer;
 }
@@ -15,8 +17,19 @@ public:
     explicit CharacterSetExplorer(QWidget *parent = 0);
     ~CharacterSetExplorer();
 
+    void setCharSet(CharacterSet &charset);
+
+public slots:
+    void handleDrawButton();
+    void handleInsertCharButton();
+    void handleTextChanged(QString string);
+
 private:
     Ui::CharacterSetExplorer *ui;
+
+    QByteArray m_unpackedScreen;
+
+    CharacterSet m_charset;
 };
 
 #endif // CHARACTERSETEXPLORER_H
diff --git a/src/ui/widgets/CharacterSetExplorer.ui b/src/ui/widgets/CharacterSetExplorer.ui
index 527f891..5e9cef3 100644
--- a/src/ui/widgets/CharacterSetExplorer.ui
+++ b/src/ui/widgets/CharacterSetExplorer.ui
@@ -10,12 +10,31 @@
     <height>352</height>
    </rect>
   </property>
+  <property name="sizePolicy">
+   <sizepolicy hsizetype="MinimumExpanding" vsizetype="MinimumExpanding">
+    <horstretch>0</horstretch>
+    <verstretch>0</verstretch>
+   </sizepolicy>
+  </property>
   <property name="windowTitle">
    <string>Dialog</string>
   </property>
+  <property name="autoFillBackground">
+   <bool>true</bool>
+  </property>
+  <property name="styleSheet">
+   <string notr="true"/>
+  </property>
   <layout class="QGridLayout" name="gridLayout" rowstretch="1,999999">
    <item row="1" column="0">
-    <widget class="QWidget" name="drawWidget" native="true"/>
+    <widget class="HiresScreenWidget" name="drawWidget" native="true">
+     <property name="minimumSize">
+      <size>
+       <width>561</width>
+       <height>384</height>
+      </size>
+     </property>
+    </widget>
    </item>
    <item row="0" column="0">
     <layout class="QHBoxLayout" name="horizontalLayout">
@@ -29,6 +48,13 @@
      <item>
       <widget class="QLineEdit" name="inputText"/>
      </item>
+     <item>
+      <widget class="QPushButton" name="insertChar">
+       <property name="text">
+        <string>Insert Char...</string>
+       </property>
+      </widget>
+     </item>
      <item>
       <widget class="QPushButton" name="drawButton">
        <property name="text">
@@ -40,6 +66,14 @@
    </item>
   </layout>
  </widget>
+ <customwidgets>
+  <customwidget>
+   <class>HiresScreenWidget</class>
+   <extends>QWidget</extends>
+   <header>HiresScreenWidget.h</header>
+   <container>1</container>
+  </customwidget>
+ </customwidgets>
  <resources/>
  <connections/>
 </ui>
diff --git a/src/ui/widgets/HiresScreenWidget.cpp b/src/ui/widgets/HiresScreenWidget.cpp
index d3cd799..c564ee7 100644
--- a/src/ui/widgets/HiresScreenWidget.cpp
+++ b/src/ui/widgets/HiresScreenWidget.cpp
@@ -120,8 +120,8 @@ void HiresScreenWidget::resizeEvent(QResizeEvent *)
 
 }
 
-void HiresScreenWidget::drawPixmap() {
-
+void HiresScreenWidget::drawPixmap()
+{
     QPainter pmpainter(&m_pixmap);
 
     pmpainter.setBrush(Qt::black);
@@ -207,7 +207,7 @@ void HiresScreenWidget::drawPixmap() {
             int xoff = cr.col() * 7;
             int yoff = cr.row() * 2;
 
-            quint8 cOffset = 0;// highBit?1:0;
+            quint8 cOffset =  highBit?1:0;
 
             quint8 doubleScan = 0;
             if (!m_showScanLines)
@@ -276,7 +276,11 @@ QByteArray HiresScreenWidget::packData(QByteArray unpackedData)
     for (int idx = 0; idx < qMin(unpackedData.count(),8192); idx++)
     {
         ColRow cr = getColRowFromRawAddress(idx);
-        packedData[cr.appleAddress()] = unpackedData[idx];
+
+        if (cr.isDefined())
+        {
+            packedData[cr.appleAddress()] = unpackedData[idx];
+        }
     }
 
     return packedData;
@@ -303,20 +307,17 @@ int HiresScreenWidget::getLineAddressOffset(int line)
 void HiresScreenWidget::setData(QByteArray data) {
     m_data = data;
 
-    drawPixmap();
+    repaint();
 }
 
 void HiresScreenWidget::drawMonoLine(QPainter &painter, int lineNum, QBitArray data) {
+    painter.setPen(Qt::black);
+    painter.drawLine(0,lineNum,data.count(),lineNum);
+    painter.setPen(Qt::white);
     for (int idx = 0; idx < data.count(); idx++) {
 
         if (data.at(idx))
-        {
-            painter.setPen(Qt::white);
-        } else {
-            painter.setPen(Qt::black);
-        }
-
-        painter.drawPoint(idx,lineNum);
+            painter.drawPoint(idx,lineNum);
     }
 }
 
@@ -402,7 +403,6 @@ QColor HiresScreenWidget::getColorFromBits(QBitArray bits, quint8 phase)
     if (bitval == 7  && phase == 3) return lightBlueColor;
 
     return whiteColor;
-
 }
 
 void HiresScreenWidget::drawNtscLine(QPainter &painter, int lineNum, QBitArray data) {
@@ -479,7 +479,6 @@ HiresScreenWidget::ColRow HiresScreenWidget::getColRowFromRawAddress(quint16 add
 
 void HiresScreenWidget::makeAddressTables()
 {
-    qDebug() << " ****** makeAddressTables()";
     m_rawAddressToColRowList.resize(8192);
     m_appleAddressToColRowList.resize(8192);
 
@@ -488,7 +487,6 @@ void HiresScreenWidget::makeAddressTables()
         for (int col = 0; col < 40; col++)
         {
             ColRow cr(col,row);
-            //    qDebug() << "Col: " << col << "Row: " << row << "Raw: " << cr.rawAddress() << "  Apple: " << cr.appleAddress();
 
             m_rawAddressToColRowList[cr.rawAddress()] = cr;
             m_appleAddressToColRowList[cr.appleAddress()] = cr;
diff --git a/src/util/charset.h b/src/util/charset.h
index f68dc59..fd34de5 100644
--- a/src/util/charset.h
+++ b/src/util/charset.h
@@ -24,14 +24,13 @@ private:
 };
 
 
-
-
 class CharacterSet
 {
 public:
     void buildSetFromSetBlob(QByteArray data);
     CharSetCharacter operator[](int asciival) const { return m_charmap[asciival]; }
     QList<CharSetCharacter> allCharacters() const;
+    bool contains(int asciival) { return m_charmap.keys().contains(asciival); }
 
 private:
     QMap<int, CharSetCharacter> m_charmap;