diff --git a/SabreTools.Models/OpenMSX/Dump.cs b/SabreTools.Models/OpenMSX/Dump.cs
index 8574d4cd..286b521b 100644
--- a/SabreTools.Models/OpenMSX/Dump.cs
+++ b/SabreTools.Models/OpenMSX/Dump.cs
@@ -9,14 +9,10 @@ namespace SabreTools.Models.OpenMSX
         [XmlElement("original")]
         public Original? Original { get; set; }
 
-        [XmlElement("rom")]
-        public Rom? Rom { get; set; }
-
-        [XmlElement("megarom")]
-        public MegaRom? MegaRom { get; set; }
-
-        [XmlElement("sccpluscart")]
-        public SCCPlusCart? SCCPlusCart { get; set; }
+        [XmlElement("rom", typeof(Rom))]
+        [XmlElement("megarom", typeof(MegaRom))]
+        [XmlElement("sccpluscart", typeof(SCCPlusCart))]
+        public RomBase? Rom { get; set; }
 
         #region DO NOT USE IN PRODUCTION
 
diff --git a/SabreTools.Models/OpenMSX/MegaRom.cs b/SabreTools.Models/OpenMSX/MegaRom.cs
index 828b9657..78fa13ac 100644
--- a/SabreTools.Models/OpenMSX/MegaRom.cs
+++ b/SabreTools.Models/OpenMSX/MegaRom.cs
@@ -1,30 +1,7 @@
-using System.Xml;
 using System.Xml.Serialization;
 
 namespace SabreTools.Models.OpenMSX
 {
     [XmlRoot("megarom")]
-    public class MegaRom
-    {
-        [XmlElement("type")]
-        public string? Type { get; set; }
-
-        [XmlElement("hash")]
-        public string? Hash { get; set; }
-
-        [XmlElement("remark")]
-        public string? Remark { get; set; }
-
-        #region DO NOT USE IN PRODUCTION
-
-        /// <remarks>Should be empty</remarks>
-        [XmlAnyAttribute]
-        public XmlAttribute[]? ADDITIONAL_ATTRIBUTES { get; set; }
-
-        /// <remarks>Should be empty</remarks>
-        [XmlAnyElement]
-        public object[]? ADDITIONAL_ELEMENTS { get; set; }
-
-        #endregion
-    }
+    public class MegaRom : RomBase { }
 }
\ No newline at end of file
diff --git a/SabreTools.Models/OpenMSX/Rom.cs b/SabreTools.Models/OpenMSX/Rom.cs
index cd837009..bfa03810 100644
--- a/SabreTools.Models/OpenMSX/Rom.cs
+++ b/SabreTools.Models/OpenMSX/Rom.cs
@@ -1,33 +1,7 @@
-using System.Xml;
 using System.Xml.Serialization;
 
 namespace SabreTools.Models.OpenMSX
 {
     [XmlRoot("rom")]
-    public class Rom
-    {
-        [XmlElement("start")]
-        public string? Start { get; set; }
-
-        [XmlElement("type")]
-        public string? Type { get; set; }
-
-        [XmlElement("hash")]
-        public string? Hash { get; set; }
-
-        [XmlElement("remark")]
-        public string? Remark { get; set; }
-
-        #region DO NOT USE IN PRODUCTION
-
-        /// <remarks>Should be empty</remarks>
-        [XmlAnyAttribute]
-        public XmlAttribute[]? ADDITIONAL_ATTRIBUTES { get; set; }
-
-        /// <remarks>Should be empty</remarks>
-        [XmlAnyElement]
-        public object[]? ADDITIONAL_ELEMENTS { get; set; }
-
-        #endregion
-    }
+    public class Rom : RomBase { }
 }
\ No newline at end of file
diff --git a/SabreTools.Models/OpenMSX/RomBase.cs b/SabreTools.Models/OpenMSX/RomBase.cs
new file mode 100644
index 00000000..a15d9d02
--- /dev/null
+++ b/SabreTools.Models/OpenMSX/RomBase.cs
@@ -0,0 +1,35 @@
+using System.Xml;
+using System.Xml.Serialization;
+
+namespace SabreTools.Models.OpenMSX
+{
+    /// <summary>
+    /// Base class to unify the various rom types
+    /// </summary>
+    public abstract class RomBase
+    {
+        [XmlElement("start")]
+        public string? Start { get; set; }
+
+        [XmlElement("type")]
+        public string? Type { get; set; }
+
+        [XmlElement("hash")]
+        public string? Hash { get; set; }
+
+        [XmlElement("remark")]
+        public string? Remark { get; set; }
+
+        #region DO NOT USE IN PRODUCTION
+
+        /// <remarks>Should be empty</remarks>
+        [XmlAnyAttribute]
+        public XmlAttribute[]? ADDITIONAL_ATTRIBUTES { get; set; }
+
+        /// <remarks>Should be empty</remarks>
+        [XmlAnyElement]
+        public object[]? ADDITIONAL_ELEMENTS { get; set; }
+
+        #endregion
+    }
+}
\ No newline at end of file
diff --git a/SabreTools.Models/OpenMSX/SCCPlusCart.cs b/SabreTools.Models/OpenMSX/SCCPlusCart.cs
index ad65749e..9d108317 100644
--- a/SabreTools.Models/OpenMSX/SCCPlusCart.cs
+++ b/SabreTools.Models/OpenMSX/SCCPlusCart.cs
@@ -1,30 +1,7 @@
-using System.Xml;
 using System.Xml.Serialization;
 
 namespace SabreTools.Models.OpenMSX
 {
     [XmlRoot("sccpluscart")]
-    public class SCCPlusCart
-    {
-        [XmlElement("boot")]
-        public string? Boot { get; set; }
-
-        [XmlElement("hash")]
-        public string? Hash { get; set; }
-
-        [XmlElement("remark")]
-        public string? Remark { get; set; }
-
-        #region DO NOT USE IN PRODUCTION
-
-        /// <remarks>Should be empty</remarks>
-        [XmlAnyAttribute]
-        public XmlAttribute[]? ADDITIONAL_ATTRIBUTES { get; set; }
-
-        /// <remarks>Should be empty</remarks>
-        [XmlAnyElement]
-        public object[]? ADDITIONAL_ELEMENTS { get; set; }
-
-        #endregion
-    }
+    public class SCCPlusCart : RomBase { }
 }
\ No newline at end of file
diff --git a/SabreTools.Test/Parser/SerializationTests.cs b/SabreTools.Test/Parser/SerializationTests.cs
index f182772e..8978d694 100644
--- a/SabreTools.Test/Parser/SerializationTests.cs
+++ b/SabreTools.Test/Parser/SerializationTests.cs
@@ -671,18 +671,6 @@ namespace SabreTools.Test.Parser
                         Assert.Null(dump.Rom.ADDITIONAL_ATTRIBUTES);
                         Assert.Null(dump.Rom.ADDITIONAL_ELEMENTS);
                     }
-
-                    if (dump.MegaRom != null)
-                    {
-                        Assert.Null(dump.MegaRom.ADDITIONAL_ATTRIBUTES);
-                        Assert.Null(dump.MegaRom.ADDITIONAL_ELEMENTS);
-                    }
-
-                    if (dump.SCCPlusCart != null)
-                    {
-                        Assert.Null(dump.SCCPlusCart.ADDITIONAL_ATTRIBUTES);
-                        Assert.Null(dump.SCCPlusCart.ADDITIONAL_ELEMENTS);
-                    }
                 }
             }
         }