Forgot to add these files

BizHawk.Emulation.Common/Base Implementations/TraceBuffer.cs

@@ -0,0 +1,39 @@
+using System.Text;
+
+namespace BizHawk.Emulation.Common
+{
+	public class TraceBuffer : ITracer
+	{
+		private readonly StringBuilder buffer;
+
+		public TraceBuffer()
+		{
+			buffer = new StringBuilder();
+			Header = "Instructions";
+		}
+
+		public string TakeContents()
+		{
+			string s = buffer.ToString();
+			buffer.Clear();
+			return s;
+		}
+
+		public string Contents
+		{
+			get { return buffer.ToString(); }
+		}
+
+		public void Put(string content)
+		{
+			if (Enabled)
+			{
+				buffer.AppendLine(content);
+			}
+		}
+
+		public bool Enabled { get; set; }
+
+		public string Header { get; set; }
+	}
+}

BizHawk.Emulation.Common/Extensions.cs

@@ -22,6 +22,11 @@ namespace BizHawk.Emulation.Common.IEmulatorExtensions
 			return core != null && core.ServiceProvider.HasService<IMemoryDomains>();
 		}
 
+		public static IMemoryDomains GetMemoryDomains(this IEmulator core)
+		{
+			return (IMemoryDomains)core.ServiceProvider.GetService<IMemoryDomains>();
+		}
+
 		public static bool HasSaveRam(this IEmulator core)
 		{
 			return core != null && core.ServiceProvider.HasService<ISaveRam>();

BizHawk.Emulation.Common/Interfaces/ITracer.cs

@@ -0,0 +1,30 @@
+namespace BizHawk.Emulation.Common
+{
+	/// <summary>
+	/// Allows the cpu to dump trace info to a trace stream
+	/// </summary>
+	public interface ITracer
+	{
+		bool Enabled { get; set; }
+
+		/// <summary>
+		/// The header that would be used by a trace logger
+		/// </summary>
+		string Header { get; set; }
+
+		/// <summary>
+		/// The current log of cpu instructions
+		/// </summary>
+		string Contents { get; }
+
+		/// <summary>
+		/// Takes the current log of cpu instructions, when doing so, it will clear the contents from the buffer
+		/// </summary>
+		string TakeContents();
+
+		/// <summary>
+		/// Adds contents to the log of cpu instructions
+		/// </summary>
+		void Put(string content);
+	}
+}