diff --git a/Asm65/CpuDef.cs b/Asm65/CpuDef.cs
index acfc3bb..200f3d3 100644
--- a/Asm65/CpuDef.cs
+++ b/Asm65/CpuDef.cs
@@ -13,7 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
- using System;
+using System;
 using System.Diagnostics;
 
 namespace Asm65 {
diff --git a/SourceGen/AppForms/FormatSplitAddress.Designer.cs b/SourceGen/AppForms/FormatSplitAddress.Designer.cs
new file mode 100644
index 0000000..277878d
--- /dev/null
+++ b/SourceGen/AppForms/FormatSplitAddress.Designer.cs
@@ -0,0 +1,422 @@
+namespace SourceGen.AppForms {
+    partial class FormatSplitAddress {
+        /// <summary>
+        /// Required designer variable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        /// Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing) {
+            if (disposing && (components != null)) {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        /// Required method for Designer support - do not modify
+        /// the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent() {
+            System.Windows.Forms.ListViewItem listViewItem2 = new System.Windows.Forms.ListViewItem(new string[] {
+            "123456",
+            "(+) T_123456"}, -1);
+            this.cancelButton = new System.Windows.Forms.Button();
+            this.okButton = new System.Windows.Forms.Button();
+            this.selectionInfoLabel = new System.Windows.Forms.Label();
+            this.addressCharacteristicsGroup = new System.Windows.Forms.GroupBox();
+            this.returnAddrCheckBox = new System.Windows.Forms.CheckBox();
+            this.width24Button = new System.Windows.Forms.RadioButton();
+            this.width16Radio = new System.Windows.Forms.RadioButton();
+            this.lowByteGroupBox = new System.Windows.Forms.GroupBox();
+            this.lowThirdPartRadio = new System.Windows.Forms.RadioButton();
+            this.lowSecondPartRadio = new System.Windows.Forms.RadioButton();
+            this.lowFirstPartRadio = new System.Windows.Forms.RadioButton();
+            this.highByteGroupBox = new System.Windows.Forms.GroupBox();
+            this.highConstantTextBox = new System.Windows.Forms.TextBox();
+            this.highConstantRadio = new System.Windows.Forms.RadioButton();
+            this.highThirdPartRadio = new System.Windows.Forms.RadioButton();
+            this.highSecondPartRadio = new System.Windows.Forms.RadioButton();
+            this.highFirstPartRadio = new System.Windows.Forms.RadioButton();
+            this.bankByteGroupBox = new System.Windows.Forms.GroupBox();
+            this.bankConstantTextBox = new System.Windows.Forms.TextBox();
+            this.bankNthPartRadio = new System.Windows.Forms.RadioButton();
+            this.bankConstantRadio = new System.Windows.Forms.RadioButton();
+            this.outputPreviewListView = new System.Windows.Forms.ListView();
+            this.addrColumnHeader = ((System.Windows.Forms.ColumnHeader)(new System.Windows.Forms.ColumnHeader()));
+            this.symbolColumnHeader = ((System.Windows.Forms.ColumnHeader)(new System.Windows.Forms.ColumnHeader()));
+            this.outputPreviewGroupBox = new System.Windows.Forms.GroupBox();
+            this.addCodeHintCheckBox = new System.Windows.Forms.CheckBox();
+            this.optionsGroupBox = new System.Windows.Forms.GroupBox();
+            this.addressCharacteristicsGroup.SuspendLayout();
+            this.lowByteGroupBox.SuspendLayout();
+            this.highByteGroupBox.SuspendLayout();
+            this.bankByteGroupBox.SuspendLayout();
+            this.outputPreviewGroupBox.SuspendLayout();
+            this.optionsGroupBox.SuspendLayout();
+            this.SuspendLayout();
+            // 
+            // cancelButton
+            // 
+            this.cancelButton.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
+            this.cancelButton.DialogResult = System.Windows.Forms.DialogResult.Cancel;
+            this.cancelButton.Location = new System.Drawing.Point(479, 465);
+            this.cancelButton.Name = "cancelButton";
+            this.cancelButton.Size = new System.Drawing.Size(75, 23);
+            this.cancelButton.TabIndex = 0;
+            this.cancelButton.Text = "Cancel";
+            this.cancelButton.UseVisualStyleBackColor = true;
+            // 
+            // okButton
+            // 
+            this.okButton.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right)));
+            this.okButton.DialogResult = System.Windows.Forms.DialogResult.OK;
+            this.okButton.Location = new System.Drawing.Point(398, 465);
+            this.okButton.Name = "okButton";
+            this.okButton.Size = new System.Drawing.Size(75, 23);
+            this.okButton.TabIndex = 1;
+            this.okButton.Text = "OK";
+            this.okButton.UseVisualStyleBackColor = true;
+            this.okButton.Click += new System.EventHandler(this.okButton_Click);
+            // 
+            // selectionInfoLabel
+            // 
+            this.selectionInfoLabel.AutoSize = true;
+            this.selectionInfoLabel.Location = new System.Drawing.Point(13, 13);
+            this.selectionInfoLabel.Name = "selectionInfoLabel";
+            this.selectionInfoLabel.Size = new System.Drawing.Size(207, 13);
+            this.selectionInfoLabel.TabIndex = 2;
+            this.selectionInfoLabel.Text = "There are {0} bytes selected in {1} groups.";
+            // 
+            // addressCharacteristicsGroup
+            // 
+            this.addressCharacteristicsGroup.Controls.Add(this.returnAddrCheckBox);
+            this.addressCharacteristicsGroup.Controls.Add(this.width24Button);
+            this.addressCharacteristicsGroup.Controls.Add(this.width16Radio);
+            this.addressCharacteristicsGroup.Location = new System.Drawing.Point(16, 44);
+            this.addressCharacteristicsGroup.Name = "addressCharacteristicsGroup";
+            this.addressCharacteristicsGroup.Size = new System.Drawing.Size(222, 90);
+            this.addressCharacteristicsGroup.TabIndex = 3;
+            this.addressCharacteristicsGroup.TabStop = false;
+            this.addressCharacteristicsGroup.Text = "Address Characteristics";
+            // 
+            // returnAddrCheckBox
+            // 
+            this.returnAddrCheckBox.AutoSize = true;
+            this.returnAddrCheckBox.Location = new System.Drawing.Point(7, 68);
+            this.returnAddrCheckBox.Name = "returnAddrCheckBox";
+            this.returnAddrCheckBox.Size = new System.Drawing.Size(170, 17);
+            this.returnAddrCheckBox.TabIndex = 2;
+            this.returnAddrCheckBox.Text = "Return addresses (address - 1)";
+            this.returnAddrCheckBox.UseVisualStyleBackColor = true;
+            // 
+            // width24Button
+            // 
+            this.width24Button.AutoSize = true;
+            this.width24Button.Location = new System.Drawing.Point(7, 44);
+            this.width24Button.Name = "width24Button";
+            this.width24Button.Size = new System.Drawing.Size(51, 17);
+            this.width24Button.TabIndex = 1;
+            this.width24Button.TabStop = true;
+            this.width24Button.Text = "24-bit";
+            this.width24Button.UseVisualStyleBackColor = true;
+            // 
+            // width16Radio
+            // 
+            this.width16Radio.AutoSize = true;
+            this.width16Radio.Location = new System.Drawing.Point(7, 20);
+            this.width16Radio.Name = "width16Radio";
+            this.width16Radio.Size = new System.Drawing.Size(51, 17);
+            this.width16Radio.TabIndex = 0;
+            this.width16Radio.TabStop = true;
+            this.width16Radio.Text = "16-bit";
+            this.width16Radio.UseVisualStyleBackColor = true;
+            // 
+            // lowByteGroupBox
+            // 
+            this.lowByteGroupBox.Controls.Add(this.lowThirdPartRadio);
+            this.lowByteGroupBox.Controls.Add(this.lowSecondPartRadio);
+            this.lowByteGroupBox.Controls.Add(this.lowFirstPartRadio);
+            this.lowByteGroupBox.Location = new System.Drawing.Point(13, 140);
+            this.lowByteGroupBox.Name = "lowByteGroupBox";
+            this.lowByteGroupBox.Size = new System.Drawing.Size(225, 94);
+            this.lowByteGroupBox.TabIndex = 4;
+            this.lowByteGroupBox.TabStop = false;
+            this.lowByteGroupBox.Text = "Low Byte";
+            // 
+            // lowThirdPartRadio
+            // 
+            this.lowThirdPartRadio.AutoSize = true;
+            this.lowThirdPartRadio.Location = new System.Drawing.Point(10, 68);
+            this.lowThirdPartRadio.Name = "lowThirdPartRadio";
+            this.lowThirdPartRadio.Size = new System.Drawing.Size(127, 17);
+            this.lowThirdPartRadio.TabIndex = 2;
+            this.lowThirdPartRadio.TabStop = true;
+            this.lowThirdPartRadio.Text = "Third part of selection";
+            this.lowThirdPartRadio.UseVisualStyleBackColor = true;
+            // 
+            // lowSecondPartRadio
+            // 
+            this.lowSecondPartRadio.AutoSize = true;
+            this.lowSecondPartRadio.Location = new System.Drawing.Point(10, 44);
+            this.lowSecondPartRadio.Name = "lowSecondPartRadio";
+            this.lowSecondPartRadio.Size = new System.Drawing.Size(140, 17);
+            this.lowSecondPartRadio.TabIndex = 1;
+            this.lowSecondPartRadio.TabStop = true;
+            this.lowSecondPartRadio.Text = "Second part of selection";
+            this.lowSecondPartRadio.UseVisualStyleBackColor = true;
+            // 
+            // lowFirstPartRadio
+            // 
+            this.lowFirstPartRadio.AutoSize = true;
+            this.lowFirstPartRadio.Location = new System.Drawing.Point(10, 20);
+            this.lowFirstPartRadio.Name = "lowFirstPartRadio";
+            this.lowFirstPartRadio.Size = new System.Drawing.Size(122, 17);
+            this.lowFirstPartRadio.TabIndex = 0;
+            this.lowFirstPartRadio.TabStop = true;
+            this.lowFirstPartRadio.Text = "First part of selection";
+            this.lowFirstPartRadio.UseVisualStyleBackColor = true;
+            // 
+            // highByteGroupBox
+            // 
+            this.highByteGroupBox.Controls.Add(this.highConstantTextBox);
+            this.highByteGroupBox.Controls.Add(this.highConstantRadio);
+            this.highByteGroupBox.Controls.Add(this.highThirdPartRadio);
+            this.highByteGroupBox.Controls.Add(this.highSecondPartRadio);
+            this.highByteGroupBox.Controls.Add(this.highFirstPartRadio);
+            this.highByteGroupBox.Location = new System.Drawing.Point(13, 240);
+            this.highByteGroupBox.Name = "highByteGroupBox";
+            this.highByteGroupBox.Size = new System.Drawing.Size(225, 120);
+            this.highByteGroupBox.TabIndex = 5;
+            this.highByteGroupBox.TabStop = false;
+            this.highByteGroupBox.Text = "High Byte";
+            // 
+            // highConstantTextBox
+            // 
+            this.highConstantTextBox.Location = new System.Drawing.Point(87, 91);
+            this.highConstantTextBox.MaxLength = 10;
+            this.highConstantTextBox.Name = "highConstantTextBox";
+            this.highConstantTextBox.Size = new System.Drawing.Size(93, 20);
+            this.highConstantTextBox.TabIndex = 4;
+            // 
+            // highConstantRadio
+            // 
+            this.highConstantRadio.AutoSize = true;
+            this.highConstantRadio.Location = new System.Drawing.Point(10, 92);
+            this.highConstantRadio.Name = "highConstantRadio";
+            this.highConstantRadio.Size = new System.Drawing.Size(70, 17);
+            this.highConstantRadio.TabIndex = 3;
+            this.highConstantRadio.TabStop = true;
+            this.highConstantRadio.Text = "Constant:";
+            this.highConstantRadio.UseVisualStyleBackColor = true;
+            // 
+            // highThirdPartRadio
+            // 
+            this.highThirdPartRadio.AutoSize = true;
+            this.highThirdPartRadio.Location = new System.Drawing.Point(10, 68);
+            this.highThirdPartRadio.Name = "highThirdPartRadio";
+            this.highThirdPartRadio.Size = new System.Drawing.Size(127, 17);
+            this.highThirdPartRadio.TabIndex = 2;
+            this.highThirdPartRadio.TabStop = true;
+            this.highThirdPartRadio.Text = "Third part of selection";
+            this.highThirdPartRadio.UseVisualStyleBackColor = true;
+            // 
+            // highSecondPartRadio
+            // 
+            this.highSecondPartRadio.AutoSize = true;
+            this.highSecondPartRadio.Location = new System.Drawing.Point(10, 44);
+            this.highSecondPartRadio.Name = "highSecondPartRadio";
+            this.highSecondPartRadio.Size = new System.Drawing.Size(140, 17);
+            this.highSecondPartRadio.TabIndex = 1;
+            this.highSecondPartRadio.TabStop = true;
+            this.highSecondPartRadio.Text = "Second part of selection";
+            this.highSecondPartRadio.UseVisualStyleBackColor = true;
+            // 
+            // highFirstPartRadio
+            // 
+            this.highFirstPartRadio.AutoSize = true;
+            this.highFirstPartRadio.Location = new System.Drawing.Point(10, 20);
+            this.highFirstPartRadio.Name = "highFirstPartRadio";
+            this.highFirstPartRadio.Size = new System.Drawing.Size(122, 17);
+            this.highFirstPartRadio.TabIndex = 0;
+            this.highFirstPartRadio.TabStop = true;
+            this.highFirstPartRadio.Text = "First part of selection";
+            this.highFirstPartRadio.UseVisualStyleBackColor = true;
+            // 
+            // bankByteGroupBox
+            // 
+            this.bankByteGroupBox.Controls.Add(this.bankConstantTextBox);
+            this.bankByteGroupBox.Controls.Add(this.bankNthPartRadio);
+            this.bankByteGroupBox.Controls.Add(this.bankConstantRadio);
+            this.bankByteGroupBox.Location = new System.Drawing.Point(13, 367);
+            this.bankByteGroupBox.Name = "bankByteGroupBox";
+            this.bankByteGroupBox.Size = new System.Drawing.Size(225, 70);
+            this.bankByteGroupBox.TabIndex = 6;
+            this.bankByteGroupBox.TabStop = false;
+            this.bankByteGroupBox.Text = "Bank Byte";
+            // 
+            // bankConstantTextBox
+            // 
+            this.bankConstantTextBox.Location = new System.Drawing.Point(87, 41);
+            this.bankConstantTextBox.MaxLength = 10;
+            this.bankConstantTextBox.Name = "bankConstantTextBox";
+            this.bankConstantTextBox.Size = new System.Drawing.Size(93, 20);
+            this.bankConstantTextBox.TabIndex = 5;
+            // 
+            // bankNthPartRadio
+            // 
+            this.bankNthPartRadio.AutoSize = true;
+            this.bankNthPartRadio.Location = new System.Drawing.Point(10, 19);
+            this.bankNthPartRadio.Name = "bankNthPartRadio";
+            this.bankNthPartRadio.Size = new System.Drawing.Size(120, 17);
+            this.bankNthPartRadio.TabIndex = 2;
+            this.bankNthPartRadio.TabStop = true;
+            this.bankNthPartRadio.Text = "Nth part of selection";
+            this.bankNthPartRadio.UseVisualStyleBackColor = true;
+            // 
+            // bankConstantRadio
+            // 
+            this.bankConstantRadio.AutoSize = true;
+            this.bankConstantRadio.Location = new System.Drawing.Point(10, 42);
+            this.bankConstantRadio.Name = "bankConstantRadio";
+            this.bankConstantRadio.Size = new System.Drawing.Size(70, 17);
+            this.bankConstantRadio.TabIndex = 1;
+            this.bankConstantRadio.TabStop = true;
+            this.bankConstantRadio.Text = "Constant:";
+            this.bankConstantRadio.UseVisualStyleBackColor = true;
+            // 
+            // outputPreviewListView
+            // 
+            this.outputPreviewListView.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left) 
+            | System.Windows.Forms.AnchorStyles.Right)));
+            this.outputPreviewListView.Columns.AddRange(new System.Windows.Forms.ColumnHeader[] {
+            this.addrColumnHeader,
+            this.symbolColumnHeader});
+            this.outputPreviewListView.FullRowSelect = true;
+            this.outputPreviewListView.HeaderStyle = System.Windows.Forms.ColumnHeaderStyle.Nonclickable;
+            this.outputPreviewListView.Items.AddRange(new System.Windows.Forms.ListViewItem[] {
+            listViewItem2});
+            this.outputPreviewListView.Location = new System.Drawing.Point(6, 19);
+            this.outputPreviewListView.MultiSelect = false;
+            this.outputPreviewListView.Name = "outputPreviewListView";
+            this.outputPreviewListView.Size = new System.Drawing.Size(290, 369);
+            this.outputPreviewListView.TabIndex = 7;
+            this.outputPreviewListView.UseCompatibleStateImageBehavior = false;
+            this.outputPreviewListView.View = System.Windows.Forms.View.Details;
+            // 
+            // addrColumnHeader
+            // 
+            this.addrColumnHeader.Text = "Addr";
+            // 
+            // symbolColumnHeader
+            // 
+            this.symbolColumnHeader.Text = "Symbol";
+            this.symbolColumnHeader.Width = 200;
+            // 
+            // outputPreviewGroupBox
+            // 
+            this.outputPreviewGroupBox.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
+            this.outputPreviewGroupBox.Controls.Add(this.outputPreviewListView);
+            this.outputPreviewGroupBox.Location = new System.Drawing.Point(252, 44);
+            this.outputPreviewGroupBox.Name = "outputPreviewGroupBox";
+            this.outputPreviewGroupBox.Size = new System.Drawing.Size(302, 394);
+            this.outputPreviewGroupBox.TabIndex = 8;
+            this.outputPreviewGroupBox.TabStop = false;
+            this.outputPreviewGroupBox.Text = "Output Preview";
+            // 
+            // addCodeHintCheckBox
+            // 
+            this.addCodeHintCheckBox.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
+            | System.Windows.Forms.AnchorStyles.Left)));
+            this.addCodeHintCheckBox.AutoSize = true;
+            this.addCodeHintCheckBox.Location = new System.Drawing.Point(10, 19);
+            this.addCodeHintCheckBox.Name = "addCodeHintCheckBox";
+            this.addCodeHintCheckBox.Size = new System.Drawing.Size(123, 17);
+            this.addCodeHintCheckBox.TabIndex = 8;
+            this.addCodeHintCheckBox.Text = "Add code entry hints";
+            this.addCodeHintCheckBox.UseVisualStyleBackColor = true;
+            // 
+            // optionsGroupBox
+            // 
+            this.optionsGroupBox.Controls.Add(this.addCodeHintCheckBox);
+            this.optionsGroupBox.Location = new System.Drawing.Point(13, 444);
+            this.optionsGroupBox.Name = "optionsGroupBox";
+            this.optionsGroupBox.Size = new System.Drawing.Size(225, 43);
+            this.optionsGroupBox.TabIndex = 9;
+            this.optionsGroupBox.TabStop = false;
+            this.optionsGroupBox.Text = "Options";
+            // 
+            // FormatSplitAddress
+            // 
+            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
+            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+            this.ClientSize = new System.Drawing.Size(566, 500);
+            this.Controls.Add(this.optionsGroupBox);
+            this.Controls.Add(this.outputPreviewGroupBox);
+            this.Controls.Add(this.bankByteGroupBox);
+            this.Controls.Add(this.highByteGroupBox);
+            this.Controls.Add(this.lowByteGroupBox);
+            this.Controls.Add(this.addressCharacteristicsGroup);
+            this.Controls.Add(this.selectionInfoLabel);
+            this.Controls.Add(this.okButton);
+            this.Controls.Add(this.cancelButton);
+            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;
+            this.MaximizeBox = false;
+            this.MinimizeBox = false;
+            this.Name = "FormatSplitAddress";
+            this.ShowInTaskbar = false;
+            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterParent;
+            this.Text = "Format Split-Address Table";
+            this.Load += new System.EventHandler(this.FormatSplitAddress_Load);
+            this.addressCharacteristicsGroup.ResumeLayout(false);
+            this.addressCharacteristicsGroup.PerformLayout();
+            this.lowByteGroupBox.ResumeLayout(false);
+            this.lowByteGroupBox.PerformLayout();
+            this.highByteGroupBox.ResumeLayout(false);
+            this.highByteGroupBox.PerformLayout();
+            this.bankByteGroupBox.ResumeLayout(false);
+            this.bankByteGroupBox.PerformLayout();
+            this.outputPreviewGroupBox.ResumeLayout(false);
+            this.optionsGroupBox.ResumeLayout(false);
+            this.optionsGroupBox.PerformLayout();
+            this.ResumeLayout(false);
+            this.PerformLayout();
+
+        }
+
+        #endregion
+
+        private System.Windows.Forms.Button cancelButton;
+        private System.Windows.Forms.Button okButton;
+        private System.Windows.Forms.Label selectionInfoLabel;
+        private System.Windows.Forms.GroupBox addressCharacteristicsGroup;
+        private System.Windows.Forms.RadioButton width16Radio;
+        private System.Windows.Forms.RadioButton width24Button;
+        private System.Windows.Forms.CheckBox returnAddrCheckBox;
+        private System.Windows.Forms.GroupBox lowByteGroupBox;
+        private System.Windows.Forms.RadioButton lowFirstPartRadio;
+        private System.Windows.Forms.RadioButton lowSecondPartRadio;
+        private System.Windows.Forms.RadioButton lowThirdPartRadio;
+        private System.Windows.Forms.GroupBox highByteGroupBox;
+        private System.Windows.Forms.RadioButton highFirstPartRadio;
+        private System.Windows.Forms.RadioButton highSecondPartRadio;
+        private System.Windows.Forms.RadioButton highThirdPartRadio;
+        private System.Windows.Forms.RadioButton highConstantRadio;
+        private System.Windows.Forms.TextBox highConstantTextBox;
+        private System.Windows.Forms.GroupBox bankByteGroupBox;
+        private System.Windows.Forms.ListView outputPreviewListView;
+        private System.Windows.Forms.ColumnHeader addrColumnHeader;
+        private System.Windows.Forms.ColumnHeader symbolColumnHeader;
+        private System.Windows.Forms.RadioButton bankConstantRadio;
+        private System.Windows.Forms.RadioButton bankNthPartRadio;
+        private System.Windows.Forms.TextBox bankConstantTextBox;
+        private System.Windows.Forms.GroupBox outputPreviewGroupBox;
+        private System.Windows.Forms.CheckBox addCodeHintCheckBox;
+        private System.Windows.Forms.GroupBox optionsGroupBox;
+    }
+}
\ No newline at end of file
diff --git a/SourceGen/AppForms/FormatSplitAddress.cs b/SourceGen/AppForms/FormatSplitAddress.cs
new file mode 100644
index 0000000..75edcd6
--- /dev/null
+++ b/SourceGen/AppForms/FormatSplitAddress.cs
@@ -0,0 +1,73 @@
+/*
+ * Copyright 2018 faddenSoft
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Windows.Forms;
+
+using Asm65;
+using CommonUtil;
+
+namespace SourceGen.AppForms {
+    public partial class FormatSplitAddress : Form {
+        /// <summary>
+        /// Result set that describes the formatting to perform.  Not all regions will have
+        /// the same format, e.g. the "mixed ASCII" mode will alternate strings and bytes
+        /// (rather than a dedicated "mixed ASCII" format type).
+        /// </summary>
+        public SortedList<int, FormatDescriptor> Results { get; private set; }
+
+        /// <summary>
+        /// Selected offsets.  An otherwise contiguous range of offsets can be broken up
+        /// by user-specified labels and address discontinuities, so this needs to be
+        /// processed by range.
+        /// </summary>
+        public TypedRangeSet Selection { private get; set; }
+
+        /// <summary>
+        /// Raw file data.
+        /// </summary>
+        private byte[] mFileData;
+
+        /// <summary>
+        /// Symbol table to use when resolving symbolic values.
+        /// </summary>
+        private SymbolTable mSymbolTable;
+
+        /// <summary>
+        /// Formatter to use when displaying addresses and hex values.
+        /// </summary>
+        private Asm65.Formatter mFormatter;
+
+
+        public FormatSplitAddress(byte[] fileData, SymbolTable symbolTable,
+                Formatter formatter) {
+            InitializeComponent();
+
+            mFileData = fileData;
+            mSymbolTable = symbolTable;
+            mFormatter = formatter;
+        }
+
+        private void FormatSplitAddress_Load(object sender, EventArgs e) {
+
+        }
+
+        private void okButton_Click(object sender, EventArgs e) {
+            Results = new SortedList<int, FormatDescriptor>();
+        }
+    }
+}
diff --git a/SourceGen/AppForms/FormatSplitAddress.resx b/SourceGen/AppForms/FormatSplitAddress.resx
new file mode 100644
index 0000000..1af7de1
--- /dev/null
+++ b/SourceGen/AppForms/FormatSplitAddress.resx
@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>
\ No newline at end of file
diff --git a/SourceGen/AppForms/ProjectView.Designer.cs b/SourceGen/AppForms/ProjectView.Designer.cs
index 949677b..60f3ea1 100644
--- a/SourceGen/AppForms/ProjectView.Designer.cs
+++ b/SourceGen/AppForms/ProjectView.Designer.cs
@@ -174,6 +174,7 @@ namespace SourceGen.AppForms
             this.symbolNameColumnHeader = ((System.Windows.Forms.ColumnHeader)(new System.Windows.Forms.ColumnHeader()));
             this.infoGroupBox = new System.Windows.Forms.GroupBox();
             this.infoTextBox = new System.Windows.Forms.TextBox();
+            this.formatSplitAddressTableToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
             this.mainMenuStrip.SuspendLayout();
             this.mainStatusStrip.SuspendLayout();
             this.mainToolStrip.SuspendLayout();
@@ -463,6 +464,7 @@ namespace SourceGen.AppForms
             this.hintAsInlineDataToolStripMenuItem,
             this.removeHintToolStripMenuItem,
             this.toolStripMenuItem11,
+            this.formatSplitAddressTableToolStripMenuItem,
             this.toggleSingleBytesToolStripMenuItem,
             this.deleteNoteCommentToolStripMenuItem,
             this.toolStripMenuItem9,
@@ -1433,6 +1435,13 @@ namespace SourceGen.AppForms
             this.infoTextBox.Size = new System.Drawing.Size(177, 120);
             this.infoTextBox.TabIndex = 0;
             // 
+            // formatSplitAddressTableToolStripMenuItem
+            // 
+            this.formatSplitAddressTableToolStripMenuItem.Name = "formatSplitAddressTableToolStripMenuItem";
+            this.formatSplitAddressTableToolStripMenuItem.Size = new System.Drawing.Size(255, 22);
+            this.formatSplitAddressTableToolStripMenuItem.Text = "Format Split-Address Table";
+            this.formatSplitAddressTableToolStripMenuItem.Click += new System.EventHandler(this.FormatSplitAddressTable_Click);
+            // 
             // ProjectView
             // 
             this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
@@ -1617,6 +1626,7 @@ namespace SourceGen.AppForms
         private System.Windows.Forms.ToolStripMenuItem toggleSingleBytesToolStripMenuItem;
         private System.Windows.Forms.ToolStripMenuItem editProjectSymbolToolStripMenuItem;
         private System.Windows.Forms.ToolStripMenuItem deleteNoteCommentToolStripMenuItem;
+        private System.Windows.Forms.ToolStripMenuItem formatSplitAddressTableToolStripMenuItem;
     }
 }
 
diff --git a/SourceGen/AppForms/ProjectView.cs b/SourceGen/AppForms/ProjectView.cs
index ecc646b..f1b731d 100644
--- a/SourceGen/AppForms/ProjectView.cs
+++ b/SourceGen/AppForms/ProjectView.cs
@@ -2224,9 +2224,12 @@ namespace SourceGen.AppForms {
                 }
             }
 
+            formatSplitAddressTableToolStripMenuItem.Enabled =
+                (entityCounts.mDataLines > 1 && entityCounts.mCodeLines == 0);
             toggleSingleBytesToolStripMenuItem.Enabled =
                 (entityCounts.mDataLines > 0 && entityCounts.mCodeLines == 0);
 
+
             // So long as some code or data is highlighted, allow these.  Don't worry about
             // control lines.  Disable options that would have no effect.
             bool enableHints = (entityCounts.mDataLines > 0 || entityCounts.mCodeLines > 0);
@@ -2614,6 +2617,34 @@ namespace SourceGen.AppForms {
             dlg.Dispose();
         }
 
+        private void FormatSplitAddressTable_Click(object sender, EventArgs e) {
+            FormatSplitAddress dlg = new FormatSplitAddress(mProject.FileData,
+                mProject.SymbolTable, mOutputFormatter);
+
+            TypedRangeSet trs = dlg.Selection = GroupedOffsetSetFromSelected();
+            if (trs.Count == 0) {
+                // shouldn't happen
+                Debug.Assert(false, "FormatSplitAddressTable found nothing to edit");
+                dlg.Dispose();
+                return;
+            }
+
+            // TODO: check to see if the selection is eligible for treatment as a
+            //   split-address table.  If not, show a dialog explaining why.
+
+            dlg.ShowDialog();
+            if (dlg.DialogResult == DialogResult.OK) {
+                ChangeSet cs = mProject.GenerateFormatMergeSet(dlg.Results);
+                if (cs.Count != 0) {
+                    ApplyUndoableChanges(cs);
+                } else {
+                    Debug.WriteLine("No change to data formats");
+                }
+            }
+
+            dlg.Dispose();
+        }
+
         private void ToggleSingleBytes_Click(object sender, EventArgs e) {
             TypedRangeSet trs = GroupedOffsetSetFromSelected();
             if (trs.Count == 0) {
diff --git a/SourceGen/SourceGen.csproj b/SourceGen/SourceGen.csproj
index bab598f..55edcde 100644
--- a/SourceGen/SourceGen.csproj
+++ b/SourceGen/SourceGen.csproj
@@ -83,6 +83,12 @@
     <Compile Include="AppForms\FindBox.Designer.cs">
       <DependentUpon>FindBox.cs</DependentUpon>
     </Compile>
+    <Compile Include="AppForms\FormatSplitAddress.cs">
+      <SubType>Form</SubType>
+    </Compile>
+    <Compile Include="AppForms\FormatSplitAddress.Designer.cs">
+      <DependentUpon>FormatSplitAddress.cs</DependentUpon>
+    </Compile>
     <Compile Include="AppForms\GotoBox.cs">
       <SubType>Form</SubType>
     </Compile>
@@ -269,6 +275,9 @@
     <EmbeddedResource Include="AppForms\FindBox.resx">
       <DependentUpon>FindBox.cs</DependentUpon>
     </EmbeddedResource>
+    <EmbeddedResource Include="AppForms\FormatSplitAddress.resx">
+      <DependentUpon>FormatSplitAddress.cs</DependentUpon>
+    </EmbeddedResource>
     <EmbeddedResource Include="AppForms\GotoBox.resx">
       <DependentUpon>GotoBox.cs</DependentUpon>
     </EmbeddedResource>