Add some more models (nw)

SabreTools.Models/OpenMSX/Rom.cs

@@ -0,0 +1,21 @@
+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; }
+    }
+}