diff --git a/SabreTools.Library/DatFiles/DatFile.cs b/SabreTools.Library/DatFiles/DatFile.cs
index d9132b61..b7a5bd93 100644
--- a/SabreTools.Library/DatFiles/DatFile.cs
+++ b/SabreTools.Library/DatFiles/DatFile.cs
@@ -5750,6 +5750,28 @@ namespace SabreTools.Library.DatFiles
 				outfileNames.Add(DatFormat.OfflineList, CreateOutfileNamesHelper(outDir, ".ol.xml", overwrite));
 			}
 
+			// openMSX
+			if (((DatFormat & DatFormat.OpenMSX) != 0)
+				&& (DatFormat & DatFormat.Logiqx) == 0
+				&& (DatFormat & DatFormat.LogiqxDepreciated) == 0
+				&& (DatFormat & DatFormat.Listxml) == 0
+				&& (DatFormat & DatFormat.SabreDat) == 0
+				&& (DatFormat & DatFormat.SoftwareList) == 0
+				&& (DatFormat & DatFormat.OfflineList) == 0)
+			{
+				outfileNames.Add(DatFormat.OfflineList, CreateOutfileNamesHelper(outDir, ".xml", overwrite));
+			}
+			if (((DatFormat & DatFormat.OpenMSX) != 0
+				&& ((DatFormat & DatFormat.Logiqx) != 0
+					|| (DatFormat & DatFormat.LogiqxDepreciated) != 0
+					|| (DatFormat & DatFormat.Listxml) != 0
+					|| (DatFormat & DatFormat.SabreDat) != 0
+					|| (DatFormat & DatFormat.SoftwareList) != 0
+					|| (DatFormat & DatFormat.OfflineList) != 0)))
+			{
+				outfileNames.Add(DatFormat.OfflineList, CreateOutfileNamesHelper(outDir, ".msx.xml", overwrite));
+			}
+
 			// Redump MD5
 			if ((DatFormat & DatFormat.RedumpMD5) != 0)
 			{
diff --git a/SabreTools.Library/DatFiles/OpenMSX.cs b/SabreTools.Library/DatFiles/OpenMSX.cs
new file mode 100644
index 00000000..64db951e
--- /dev/null
+++ b/SabreTools.Library/DatFiles/OpenMSX.cs
@@ -0,0 +1,781 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Web;
+using System.Xml;
+
+using SabreTools.Library.Data;
+using SabreTools.Library.DatItems;
+using SabreTools.Library.Tools;
+
+#if MONO
+using System.IO;
+#else
+using Alphaleonis.Win32.Filesystem;
+
+using FileStream = System.IO.FileStream;
+using StreamWriter = System.IO.StreamWriter;
+#endif
+using NaturalSort;
+
+namespace SabreTools.Library.DatFiles
+{
+	/// <summary>
+	/// Represents parsing and writing of a openMSX softawre list XML DAT
+	/// </summary>
+	/// TODO: Verify that all write for this DatFile type is correct
+	internal class OpenMSX : DatFile
+	{
+		/// <summary>
+		/// Constructor designed for casting a base DatFile
+		/// </summary>
+		/// <param name="datFile">Parent DatFile to copy from</param>
+		public OpenMSX(DatFile datFile)
+			: base(datFile, cloneHeader: false)
+		{
+		}
+
+		/// <summary>
+		/// Parse a openMSX softawre list XML DAT and return all found games and roms within
+		/// </summary>
+		/// <param name="filename">Name of the file to be parsed</param>
+		/// <param name="sysid">System ID for the DAT</param>
+		/// <param name="srcid">Source ID for the DAT</param>
+		/// <param name="keep">True if full pathnames are to be kept, false otherwise (default)</param>
+		/// <param name="clean">True if game names are sanitized, false otherwise (default)</param>
+		/// <param name="remUnicode">True if we should remove non-ASCII characters from output, false otherwise (default)</param>
+		/// <remarks>
+		/// </remarks>
+		public override void ParseFile(
+			// Standard Dat parsing
+			string filename,
+			int sysid,
+			int srcid,
+
+			// Miscellaneous
+			bool keep,
+			bool clean,
+			bool remUnicode)
+		{
+			// Prepare all internal variables
+			Encoding enc = Utilities.GetEncoding(filename);
+			XmlReader xtr = Utilities.GetXmlTextReader(filename);
+
+			// If we got a null reader, just return
+			if (xtr == null)
+			{
+				return;
+			}
+
+			// Otherwise, read the file to the end
+			try
+			{
+				xtr.MoveToContent();
+				while (!xtr.EOF)
+				{
+					// We only want elements
+					if (xtr.NodeType != XmlNodeType.Element)
+					{
+						xtr.Read();
+						continue;
+					}
+
+					switch (xtr.Name)
+					{
+						case "softwaredb":
+							Name = (String.IsNullOrWhiteSpace(Name) ? "openMSX Software List" : Name);
+							Description = (String.IsNullOrWhiteSpace(Description) ? Name : Name);
+							// string timestamp = xtr.GetAttribute("timestamp"); // CDATA
+							xtr.Read();
+							break;
+						// We want to process the entire subtree of the software
+						case "software":
+							ReadSoftware(xtr.ReadSubtree(), filename, sysid, srcid, keep, clean, remUnicode);
+
+							// Skip the software now that we've processed it
+							xtr.Skip();
+							break;
+						default:
+							xtr.Read();
+							break;
+					}
+				}
+			}
+			catch (Exception ex)
+			{
+				Globals.Logger.Warning("Exception found while parsing '{0}': {1}", filename, ex);
+
+				// For XML errors, just skip the affected node
+				xtr?.Read();
+			}
+
+			xtr.Dispose();
+		}
+
+		/// <summary>
+		/// Read software information
+		/// </summary>
+		/// <param name="reader">XmlReader representing a machine block</param>
+		/// <param name="filename">Name of the file to be parsed</param>
+		/// <param name="sysid">System ID for the DAT</param>
+		/// <param name="srcid">Source ID for the DAT</param>
+		/// <param name="keep">True if full pathnames are to be kept, false otherwise (default)</param>
+		/// <param name="clean">True if game names are sanitized, false otherwise (default)</param>
+		/// <param name="remUnicode">True if we should remove non-ASCII characters from output, false otherwise (default)</param>
+		private void ReadSoftware(
+			XmlReader reader,
+
+			// Standard Dat parsing
+			string filename,
+			int sysid,
+			int srcid,
+
+			// Miscellaneous
+			bool keep,
+			bool clean,
+			bool remUnicode)
+		{
+			// If we have an empty machine, skip it
+			if (reader == null)
+			{
+				return;
+			}
+
+			// Otherwise, add what is possible
+			reader.MoveToContent();
+
+			bool containsItems = false;
+
+			// Create a new machine
+			Machine machine = new Machine();
+
+			while (!reader.EOF)
+			{
+				// We only want elements
+				if (reader.NodeType != XmlNodeType.Element)
+				{
+					reader.Read();
+					continue;
+				}
+
+				// Get the roms from the machine
+				switch (reader.Name)
+				{
+					case "title":
+						machine.Name = reader.ReadElementContentAsString();
+						break;
+					case "genmsxid":
+						// string id = reader.ReadElementContentAsString();
+						reader.Read();
+						break;
+					case "system":
+						// string system = reader.ReadElementContentAsString();
+						reader.Read();
+						break;
+					case "company":
+						machine.Manufacturer = reader.ReadElementContentAsString();
+						break;
+					case "year":
+						machine.Year = reader.ReadElementContentAsString();
+						break;
+					case "country":
+						// string country = reader.ReadElementContentAsString();
+						reader.Read();
+						break;
+					case "dump":
+						containsItems = ReadDump(reader.ReadSubtree(), machine, filename, sysid, srcid, keep, clean, remUnicode);
+
+						// Skip the dump now that we've processed it
+						reader.Skip();
+						break;
+					default:
+						reader.Read();
+						break;
+				}
+			}
+
+			// If no items were found for this machine, add a Blank placeholder
+			if (!containsItems)
+			{
+				if (this.KeepEmptyGames)
+				{
+					Blank blank = new Blank()
+					{
+						SystemID = sysid,
+						System = filename,
+						SourceID = srcid,
+					};
+					blank.CopyMachineInformation(machine);
+
+					// Now process and add the rom
+					ParseAddHelper(blank, clean, remUnicode);
+				}
+			}
+		}
+
+		/// <summary>
+		/// Read dump information
+		/// </summary>
+		/// <param name="reader">XmlReader representing a part block</param>
+		/// <param name="machine">Machine information to pass to contained items</param>
+		/// <param name="filename">Name of the file to be parsed</param>
+		/// <param name="sysid">System ID for the DAT</param>
+		/// <param name="srcid">Source ID for the DAT</param>
+		/// <param name="keep">True if full pathnames are to be kept, false otherwise (default)</param>
+		/// <param name="clean">True if game names are sanitized, false otherwise (default)</param>
+		/// <param name="remUnicode">True if we should remove non-ASCII characters from output, false otherwise (default)</param>
+		private bool ReadDump(
+			XmlReader reader,
+			Machine machine,
+
+			// Standard Dat parsing
+			string filename,
+			int sysid,
+			int srcid,
+
+			// Miscellaneous
+			bool keep,
+			bool clean,
+			bool remUnicode)
+		{
+			string temptype = reader.Name;
+			bool containsItems = false;
+
+			while (!reader.EOF)
+			{
+				// We only want elements
+				if (reader.NodeType != XmlNodeType.Element)
+				{
+					reader.Read();
+					continue;
+				}
+
+				// Get the elements from the dump
+				switch (reader.Name)
+				{
+					case "rom":
+						containsItems = ReadRom(reader.ReadSubtree(), machine, filename, sysid, srcid, keep, clean, remUnicode);
+
+						// Skip the rom now that we've processed it
+						reader.Skip();
+						break;
+					case "megarom":
+						containsItems = ReadMegaRom(reader.ReadSubtree(), machine, filename, sysid, srcid, keep, clean, remUnicode);
+
+						// Skip the megarom now that we've processed it
+						reader.Skip();
+						break;
+					case "sccpluscart":
+						containsItems = ReadSccPlusCart(reader.ReadSubtree(), machine, filename, sysid, srcid, keep, clean, remUnicode);
+
+						// Skip the sccpluscart now that we've processed it
+						reader.Skip();
+						break;
+					case "original":
+						// bool value = Utilities.GetYesNo(reader.GetAttribute("value");
+						// string original = reader.ReadElementContentAsString();
+						reader.Read();
+						break;
+					default:
+						reader.Read();
+						break;
+				}
+			}
+
+			return containsItems;
+		}
+
+		/// <summary>
+		/// Read rom information
+		/// </summary>
+		/// <param name="reader">XmlReader representing a part block</param>
+		/// <param name="machine">Machine information to pass to contained items</param>
+		/// <param name="filename">Name of the file to be parsed</param>
+		/// <param name="sysid">System ID for the DAT</param>
+		/// <param name="srcid">Source ID for the DAT</param>
+		/// <param name="keep">True if full pathnames are to be kept, false otherwise (default)</param>
+		/// <param name="clean">True if game names are sanitized, false otherwise (default)</param>
+		/// <param name="remUnicode">True if we should remove non-ASCII characters from output, false otherwise (default)</param>
+		private bool ReadRom(
+			XmlReader reader,
+			Machine machine,
+
+			// Standard Dat parsing
+			string filename,
+			int sysid,
+			int srcid,
+
+			// Miscellaneous
+			bool keep,
+			bool clean,
+			bool remUnicode)
+		{
+			string hash = "", offset = "", type = "", remark = "";
+			bool containsItems = false;
+
+			while (!reader.EOF)
+			{
+				// We only want elements
+				if (reader.NodeType != XmlNodeType.Element)
+				{
+					reader.Read();
+					continue;
+				}
+
+				// Get the elements from the rom
+				switch (reader.Name)
+				{
+					case "hash":
+						containsItems = true;
+						hash = reader.ReadElementContentAsString();
+						break;
+					case "start":
+						offset = reader.ReadElementContentAsString();
+						break;
+					case "type":
+						type = reader.ReadElementContentAsString();
+						break;
+					case "remark":
+						remark = reader.ReadElementContentAsString();
+						break;
+					default:
+						reader.Read();
+						break;
+				}
+			}
+
+			// Create and add the new rom
+			Rom rom = new Rom
+			{
+				Name = machine.Name + (!String.IsNullOrWhiteSpace(remark) ? " " + remark : ""),
+				Offset = offset,
+				SHA1 = Utilities.CleanHashData(hash, Constants.SHA1Length),
+			};
+
+			rom.CopyMachineInformation(machine);
+			ParseAddHelper(rom, clean, remUnicode);
+
+			return containsItems;
+		}
+
+		/// <summary>
+		/// Read megarom information
+		/// </summary>
+		/// <param name="reader">XmlReader representing a part block</param>
+		/// <param name="machine">Machine information to pass to contained items</param>
+		/// <param name="filename">Name of the file to be parsed</param>
+		/// <param name="sysid">System ID for the DAT</param>
+		/// <param name="srcid">Source ID for the DAT</param>
+		/// <param name="keep">True if full pathnames are to be kept, false otherwise (default)</param>
+		/// <param name="clean">True if game names are sanitized, false otherwise (default)</param>
+		/// <param name="remUnicode">True if we should remove non-ASCII characters from output, false otherwise (default)</param>
+		private bool ReadMegaRom(
+			XmlReader reader,
+			Machine machine,
+
+			// Standard Dat parsing
+			string filename,
+			int sysid,
+			int srcid,
+
+			// Miscellaneous
+			bool keep,
+			bool clean,
+			bool remUnicode)
+		{
+			string hash = "", offset = "", type = "", remark = "";
+			bool containsItems = false;
+
+			while (!reader.EOF)
+			{
+				// We only want elements
+				if (reader.NodeType != XmlNodeType.Element)
+				{
+					reader.Read();
+					continue;
+				}
+
+				// Get the elements from the dump
+				switch (reader.Name)
+				{
+					case "hash":
+						containsItems = true;
+						hash = reader.ReadElementContentAsString();
+						break;
+					case "start":
+						offset = reader.ReadElementContentAsString();
+						break;
+					case "type":
+						type = reader.ReadElementContentAsString();
+						break;
+					case "remark":
+						remark = reader.ReadElementContentAsString();
+						break;
+					default:
+						reader.Read();
+						break;
+				}
+			}
+
+			// Create and add the new rom
+			Rom rom = new Rom
+			{
+				Name = machine.Name + (!String.IsNullOrWhiteSpace(remark) ? " " + remark : ""),
+				Offset = offset,
+				SHA1 = Utilities.CleanHashData(hash, Constants.SHA1Length),
+			};
+
+			rom.CopyMachineInformation(machine);
+			ParseAddHelper(rom, clean, remUnicode);
+
+			return containsItems;
+		}
+
+		/// <summary>
+		/// Read sccpluscart information
+		/// </summary>
+		/// <param name="reader">XmlReader representing a part block</param>
+		/// <param name="machine">Machine information to pass to contained items</param>
+		/// <param name="filename">Name of the file to be parsed</param>
+		/// <param name="sysid">System ID for the DAT</param>
+		/// <param name="srcid">Source ID for the DAT</param>
+		/// <param name="keep">True if full pathnames are to be kept, false otherwise (default)</param>
+		/// <param name="clean">True if game names are sanitized, false otherwise (default)</param>
+		/// <param name="remUnicode">True if we should remove non-ASCII characters from output, false otherwise (default)</param>
+		private bool ReadSccPlusCart(
+			XmlReader reader,
+			Machine machine,
+
+			// Standard Dat parsing
+			string filename,
+			int sysid,
+			int srcid,
+
+			// Miscellaneous
+			bool keep,
+			bool clean,
+			bool remUnicode)
+		{
+			string hash = "", boot = "", remark = "";
+			bool containsItems = false;
+
+			while (!reader.EOF)
+			{
+				// We only want elements
+				if (reader.NodeType != XmlNodeType.Element)
+				{
+					reader.Read();
+					continue;
+				}
+
+				// Get the elements from the dump
+				switch (reader.Name)
+				{
+					case "boot":
+						boot = reader.ReadElementContentAsString();
+						break;
+					case "hash":
+						containsItems = true;
+						hash = reader.ReadElementContentAsString();
+						break;
+					case "remark":
+						remark = reader.ReadElementContentAsString();
+						break;
+					default:
+						reader.Read();
+						break;
+				}
+			}
+
+			// Create and add the new rom
+			Rom rom = new Rom
+			{
+				Name = machine.Name + (!String.IsNullOrWhiteSpace(remark) ? " " + remark : ""),
+				SHA1 = Utilities.CleanHashData(hash, Constants.SHA1Length),
+			};
+
+			rom.CopyMachineInformation(machine);
+			ParseAddHelper(rom, clean, remUnicode);
+
+			return containsItems;
+		}
+
+		/// <summary>
+		/// Create and open an output file for writing direct from a dictionary
+		/// </summary>
+		/// <param name="outfile">Name of the file to write to</param>
+		/// <param name="ignoreblanks">True if blank roms should be skipped on output, false otherwise (default)</param>
+		/// <returns>True if the DAT was written correctly, false otherwise</returns>
+		public override bool WriteToFile(string outfile, bool ignoreblanks = false)
+		{
+			try
+			{
+				Globals.Logger.User("Opening file for writing: {0}", outfile);
+				FileStream fs = Utilities.TryCreate(outfile);
+
+				// If we get back null for some reason, just log and return
+				if (fs == null)
+				{
+					Globals.Logger.Warning("File '{0}' could not be created for writing! Please check to see if the file is writable", outfile);
+					return false;
+				}
+
+				StreamWriter sw = new StreamWriter(fs, new UTF8Encoding(false));
+
+				// Write out the header
+				WriteHeader(sw);
+
+				// Write out each of the machines and roms
+				string lastgame = null;
+
+				// Get a properly sorted set of keys
+				List<string> keys = Keys;
+				keys.Sort(new NaturalComparer());
+
+				foreach (string key in keys)
+				{
+					List<DatItem> roms = this[key];
+
+					// Resolve the names in the block
+					roms = DatItem.ResolveNames(roms);
+
+					for (int index = 0; index < roms.Count; index++)
+					{
+						DatItem rom = roms[index];
+
+						// There are apparently times when a null rom can skip by, skip them
+						if (rom.Name == null || rom.MachineName == null)
+						{
+							Globals.Logger.Warning("Null rom found!");
+							continue;
+						}
+
+						// If we have a different game and we're not at the start of the list, output the end of last item
+						if (lastgame != null && lastgame.ToLowerInvariant() != rom.MachineName.ToLowerInvariant())
+						{
+							WriteEndGame(sw);
+						}
+
+						// If we have a new game, output the beginning of the new item
+						if (lastgame == null || lastgame.ToLowerInvariant() != rom.MachineName.ToLowerInvariant())
+						{
+							WriteStartGame(sw, rom);
+						}
+
+						// If we have a "null" game (created by DATFromDir or something similar), log it to file
+						if (rom.Type == ItemType.Rom
+							&& ((Rom)rom).Size == -1
+							&& ((Rom)rom).CRC == "null")
+						{
+							Globals.Logger.Verbose("Empty folder found: {0}", rom.MachineName);
+
+							lastgame = rom.MachineName;
+							continue;
+						}
+
+						// Now, output the rom data
+						WriteDatItem(sw, rom, ignoreblanks);
+
+						// Set the new data to compare against
+						lastgame = rom.MachineName;
+					}
+				}
+
+				// Write the file footer out
+				WriteFooter(sw);
+
+				Globals.Logger.Verbose("File written!" + Environment.NewLine);
+				sw.Dispose();
+				fs.Dispose();
+			}
+			catch (Exception ex)
+			{
+				Globals.Logger.Error(ex.ToString());
+				return false;
+			}
+
+			return true;
+		}
+
+		/// <summary>
+		/// Write out DAT header using the supplied StreamWriter
+		/// </summary>
+		/// <param name="sw">StreamWriter to output to</param>
+		/// <returns>True if the data was written, false on error</returns>
+		private bool WriteHeader(StreamWriter sw)
+		{
+			try
+			{
+				string header = "<?xml version=\"1.0\"?>\n" +
+							"<!DOCTYPE softwaredb SYSTEM \"softwaredb1.dtd\">\n" + 
+							"<softwaredb" +
+								// " timestamp=\"" + timestamp + "\"" +
+								">\n" +
+								@"<!-- Credits -->
+<![CDATA[
+The softwaredb.xml file contains information about rom mapper types
+
+Copyright 2003 Nicolas Beyaert (Initial Database)
+Copyright 2004-2013 BlueMSX Team
+Copyright 2005-2018 openMSX Team
+Generation MSXIDs by www.generation-msx.nl
+
+]]>";
+
+				// Write the header out
+				sw.Write(header);
+				sw.Flush();
+			}
+			catch (Exception ex)
+			{
+				Globals.Logger.Error(ex.ToString());
+				return false;
+			}
+
+			return true;
+		}
+
+		/// <summary>
+		/// Write out Game start using the supplied StreamWriter
+		/// </summary>
+		/// <param name="sw">StreamWriter to output to</param>
+		/// <param name="rom">DatItem object to be output</param>
+		/// <returns>True if the data was written, false on error</returns>
+		private bool WriteStartGame(StreamWriter sw, DatItem rom)
+		{
+			try
+			{
+				// No game should start with a path separator
+				if (rom.MachineName.StartsWith(Path.DirectorySeparatorChar.ToString()))
+				{
+					rom.MachineName = rom.MachineName.Substring(1);
+				}
+
+				string state = "<software>\n"
+							+ "\t<title>" + HttpUtility.HtmlEncode(rom.MachineName) + "</title>\n"
+							// + "\t<genmsxid>" + msxid + "</genmsxid>\n"
+							// + "\t<system>" + system + "</system>\n"
+							+ "\t<company>" + rom.Manufacturer + "</company>\n"
+							+ "\t<year>" + rom.Year + "</year>\n";
+							// + "\t<country>" + rom.Year + "</country>\n";
+
+				sw.Write(state);
+				sw.Flush();
+			}
+			catch (Exception ex)
+			{
+				Globals.Logger.Error(ex.ToString());
+				return false;
+			}
+
+			return true;
+		}
+
+		/// <summary>
+		/// Write out Game start using the supplied StreamWriter
+		/// </summary>
+		/// <param name="sw">StreamWriter to output to</param>
+		/// <returns>True if the data was written, false on error</returns>
+		private bool WriteEndGame(StreamWriter sw)
+		{
+			try
+			{
+				string state = "</software>\n";
+
+				sw.Write(state);
+				sw.Flush();
+			}
+			catch (Exception ex)
+			{
+				Globals.Logger.Error(ex.ToString());
+				return false;
+			}
+
+			return true;
+		}
+
+		/// <summary>
+		/// Write out DatItem using the supplied StreamWriter
+		/// </summary>
+		/// <param name="sw">StreamWriter to output to</param>
+		/// <param name="rom">DatItem object to be output</param>
+		/// <param name="ignoreblanks">True if blank roms should be skipped on output, false otherwise (default)</param>
+		/// <returns>True if the data was written, false on error</returns>
+		private bool WriteDatItem(StreamWriter sw, DatItem rom, bool ignoreblanks = false)
+		{
+			// If we are in ignore blanks mode AND we have a blank (0-size) rom, skip
+			if (ignoreblanks
+				&& (rom.Type == ItemType.Rom
+				&& (((Rom)rom).Size == 0 || ((Rom)rom).Size == -1)))
+			{
+				return true;
+			}
+
+			try
+			{
+				string state = "";
+
+				// Pre-process the item name
+				ProcessItemName(rom, true);
+
+				switch (rom.Type)
+				{
+					case ItemType.Archive:
+						break;
+					case ItemType.BiosSet:
+						break;
+					case ItemType.Disk:
+						break;
+					case ItemType.Release:
+						break;
+					case ItemType.Rom: // Currently this encapsulates rom, megarom, and sccpluscart
+						state += "\t\t<dump>"
+							// + "<original value=\"true\">GoodMSX</original>"
+							+ "<rom>"
+							+ (!String.IsNullOrWhiteSpace(((Rom)rom).Offset) ? "<start>" + ((Rom)rom).Offset + "</start>" : "")
+							// + "<type>Normal</type>"
+							+ "<hash>" + ((Rom)rom).SHA1 + "</hash>"
+							// + "<remark></remark>"
+							+ "</rom></dump>\n";
+							break;
+					case ItemType.Sample:
+						break;
+				}
+
+				sw.Write(state);
+				sw.Flush();
+			}
+			catch (Exception ex)
+			{
+				Globals.Logger.Error(ex.ToString());
+				return false;
+			}
+
+			return true;
+		}
+
+		/// <summary>
+		/// Write out DAT footer using the supplied StreamWriter
+		/// </summary>
+		/// <param name="sw">StreamWriter to output to</param>
+		/// <returns>True if the data was written, false on error</returns>
+		private bool WriteFooter(StreamWriter sw)
+		{
+			try
+			{
+				string footer = "</software>\n</softwaredb>\n";
+
+				// Write the footer out
+				sw.Write(footer);
+				sw.Flush();
+			}
+			catch (Exception ex)
+			{
+				Globals.Logger.Error(ex.ToString());
+				return false;
+			}
+
+			return true;
+		}
+	}
+}
diff --git a/SabreTools.Library/Data/Constants.cs b/SabreTools.Library/Data/Constants.cs
index 85df7db6..fa5cd0be 100644
--- a/SabreTools.Library/Data/Constants.cs
+++ b/SabreTools.Library/Data/Constants.cs
@@ -424,6 +424,16 @@ namespace SabreTools.Library.Data
 			<!ATTLIST softwarelist filter CDATA #IMPLIED>
 		<!ELEMENT ramoption (#PCDATA)>
 			<!ATTLIST ramoption default CDATA #IMPLIED>
+";
+		public const string OpenMSXDTD = @"<!ELEMENT softwaredb (person*)>
+<!ELEMENT software (title, genmsxid?, system, company,year,country,dump)>
+<!ELEMENT title (#PCDATA)>
+<!ELEMENT genmsxid (#PCDATA)>
+<!ELEMENT system (#PCDATA)>
+<!ELEMENT company (#PCDATA)>
+<!ELEMENT year (#PCDATA)>
+<!ELEMENT country (#PCDATA)>
+<!ELEMENT dump (#PCDATA)>
 ";
 		public const string SoftwareListDTD = @"<!ELEMENT softwarelist (software+)>
 	<!ATTLIST softwarelist name CDATA #REQUIRED>
diff --git a/SabreTools.Library/Data/Flags.cs b/SabreTools.Library/Data/Flags.cs
index 87bbf919..f990e409 100644
--- a/SabreTools.Library/Data/Flags.cs
+++ b/SabreTools.Library/Data/Flags.cs
@@ -199,9 +199,10 @@ namespace SabreTools.Library.Data
 		Listxml = SoftwareList << 1,
 		OfflineList = Listxml << 1,
 		SabreDat = OfflineList << 1,
+		OpenMSX = SabreDat << 1,
 
 		// Propietary Formats
-		ClrMamePro = SabreDat << 1,
+		ClrMamePro = OpenMSX << 1,
 		RomCenter = ClrMamePro << 1,
 		DOSCenter = RomCenter << 1,
 		AttractMode = DOSCenter << 1,
diff --git a/SabreTools.Library/README.1ST b/SabreTools.Library/README.1ST
index b9f398b9..b5e5bf40 100644
--- a/SabreTools.Library/README.1ST
+++ b/SabreTools.Library/README.1ST
@@ -218,6 +218,7 @@ Options:
 			  lx, listxml	   - MAME Listxml
 			  miss, missfile   - GoodTools Missfile
 			  md5			   - MD5
+			  msx, openmsx	   - openMSX Software List
 			  ol, offlinelist  - OfflineList XML
 			  rc, romcenter	   - RomCenter
 			  sd, sabredat	   - SabreDat XML
@@ -402,6 +403,7 @@ Options:
 			  lx, listxml	   - MAME Listxml
 			  miss, missfile   - GoodTools Missfile
 			  md5			   - MD5
+			  msx, openmsx	   - openMSX Software List
 			  ol, offlinelist  - OfflineList XML
 			  rc, romcenter	   - RomCenter
 			  sd, sabredat	   - SabreDat XML
@@ -700,27 +702,28 @@ Options:
 		  this flag are allowed.
 		  
 		  Possible values are:
-		  all			  - All available DAT types
-		  am, attractmode  - AttractMode XML
-		  cmp, clrmamepro  - ClrMamePro
-		  csv			  - Standardized Comma-Separated Value
-		  dc, doscenter	- DOSCenter
-		  lr, listrom	  - MAME Listrom
-		  lx, listxml	  - MAME Listxml
-		  miss, missfile   - GoodTools Missfile
-		  md5			  - MD5
-		  ol, offlinelist  - OfflineList XML
-		  rc, romcenter	- RomCenter
-		  sd, sabredat	 - SabreDat XML
-		  sfv			  - SFV
-		  sha1			 - SHA1
-		  sha256		   - SHA256
-		  sha384		   - SHA384
-		  sha512		   - SHA512
-		  sl, softwarelist - MAME Software List XML
-		  ssv			  - Standardized Semicolon-Separated Value
-		  tsv			  - Standardized Tab-Separated Value
-		  xml, logiqx	  - Logiqx XML
+			  all			   - All available DAT types
+			  am, attractmode  - AttractMode XML
+			  cmp, clrmamepro  - ClrMamePro
+			  csv			   - Standardized Comma-Separated Value
+			  dc, doscenter	   - DOSCenter
+			  lr, listrom	   - MAME Listrom
+			  lx, listxml	   - MAME Listxml
+			  miss, missfile   - GoodTools Missfile
+			  md5			   - MD5
+			  msx, openmsx	   - openMSX Software List
+			  ol, offlinelist  - OfflineList XML
+			  rc, romcenter	   - RomCenter
+			  sd, sabredat	   - SabreDat XML
+			  sfv			   - SFV
+			  sha1			   - SHA1
+			  sha256		   - SHA256
+			  sha384		   - SHA384
+			  sha512		   - SHA512
+			  sl, softwarelist - MAME Software List XML
+			  ssv			   - Standardized Semicolon-Separated Value
+			  tsv			   - Standardized Tab-Separated Value
+			  xml, logiqx	   - Logiqx XML
 
 		  -pre, --prefix			  Set prefix for all lines
 			  Set a generic prefix to be prepended to all outputted lines.
diff --git a/SabreTools.Library/SabreTools.Library.csproj b/SabreTools.Library/SabreTools.Library.csproj
index 75ddf549..94d56ad3 100644
--- a/SabreTools.Library/SabreTools.Library.csproj
+++ b/SabreTools.Library/SabreTools.Library.csproj
@@ -99,6 +99,7 @@
     <Compile Include="DatFiles\Logiqx.cs" />
     <Compile Include="DatFiles\Missfile.cs" />
     <Compile Include="DatFiles\OfflineList.cs" />
+    <Compile Include="DatFiles\OpenMSX.cs" />
     <Compile Include="DatFiles\RomCenter.cs" />
     <Compile Include="DatFiles\SabreDat.cs" />
     <Compile Include="DatFiles\SeparatedValue.cs" />
diff --git a/SabreTools.Library/Tools/Utilities.cs b/SabreTools.Library/Tools/Utilities.cs
index 356f2c51..46872a4a 100644
--- a/SabreTools.Library/Tools/Utilities.cs
+++ b/SabreTools.Library/Tools/Utilities.cs
@@ -633,6 +633,8 @@ namespace SabreTools.Library.Tools
 					return new Missfile(baseDat);
 				case DatFormat.OfflineList:
 					return new OfflineList(baseDat);
+				case DatFormat.OpenMSX:
+					return new OpenMSX(baseDat);
 				case DatFormat.RedumpMD5:
 					return new Hashfile(baseDat, Hash.MD5);
 				case DatFormat.RedumpSFV:
@@ -742,11 +744,14 @@ namespace SabreTools.Library.Tools
 				case "lx":
 				case "listxml":
 					return DatFormat.Listxml;
+				case "md5":
+					return DatFormat.RedumpMD5;
 				case "miss":
 				case "missfile":
 					return DatFormat.MissFile;
-				case "md5":
-					return DatFormat.RedumpMD5;
+				case "msx":
+				case "openmsx":
+					return DatFormat.OpenMSX;
 				case "ol":
 				case "offlinelist":
 					return DatFormat.OfflineList;
@@ -1182,6 +1187,10 @@ namespace SabreTools.Library.Tools
 					{
 						return DatFormat.Listxml;
 					}
+					else if (second.StartsWith("<!doctype softwaredb"))
+					{
+						return DatFormat.OpenMSX;
+					}
 					else if (second.StartsWith("<!doctype softwarelist"))
 					{
 						return DatFormat.SoftwareList;
diff --git a/SabreTools/SabreTools.Help.cs b/SabreTools/SabreTools.Help.cs
index 08bbec69..c9e665ac 100644
--- a/SabreTools/SabreTools.Help.cs
+++ b/SabreTools/SabreTools.Help.cs
@@ -1788,6 +1788,7 @@ Possible values are:
     lx, listxml      - MAME Listxml
     miss, missfile   - GoodTools Missfile
     md5              - MD5
+    msx, openmsx     - openMSX Software List
     ol, offlinelist  - OfflineList XML
     rc, romcenter    - RomCenter
     sd, sabredat     - SabreDat XML