[ChannelFHawk] ICodeDataLogger

src/BizHawk.Emulation.Cores/Consoles/Fairchild/ChannelF/ChannelF.CpuLink.cs

@@ -7,7 +7,9 @@ public partial class ChannelF
 		public readonly struct CpuLink(ChannelF channelF) : IF3850Link
 		{
 			public byte ReadMemory(ushort address)
-				=> channelF.ReadBus(address);
+				=> channelF._cdl == null
+					? channelF.ReadBus(address)
+					: channelF.ReadMemory_CDL(address);
 
 			public void WriteMemory(ushort address, byte value)
 				=> channelF.WriteBus(address, value);

src/BizHawk.Emulation.Cores/Consoles/Fairchild/ChannelF/ChannelF.ICodeDataLog.cs

@@ -0,0 +1,86 @@
+using BizHawk.Emulation.Common;
+using System.IO;
+
+namespace BizHawk.Emulation.Cores.Consoles.ChannelF
+{
+	public partial class ChannelF : ICodeDataLogger
+	{
+		private ICodeDataLog _cdl;
+
+		public void SetCDL(ICodeDataLog cdl)
+		{
+			_cdl = cdl;
+		}
+
+		public void NewCDL(ICodeDataLog cdl)
+		{
+			void AddIfExists(string name)
+			{
+				var found = _memoryDomains[name];
+				if (found is not null) cdl[name] = new byte[found.Size];
+			}
+
+			cdl["System Bus"] = new byte[_memoryDomains["System Bus"]!.Size];
+
+			AddIfExists("BIOS1");
+			AddIfExists("BIOS2");
+			AddIfExists("ROM");
+
+			cdl.SubType = "ChannelF";
+			cdl.SubVer = 0;
+		}
+
+		[FeatureNotImplemented]
+		public void DisassembleCDL(Stream s, ICodeDataLog cdl)
+			=> throw new NotImplementedException();
+
+		public enum CDLType
+		{
+			None,
+			BIOS1, 
+			BIOS2, 
+			CARTROM
+		}
+
+		public struct CDLResult
+		{
+			public CDLType Type;
+			public int Address;
+		}
+
+		private byte ReadMemory_CDL(ushort addr)
+		{
+			var mapping = ReadCDL(addr);
+			var res = mapping.Type;
+			var address = mapping.Address;
+
+			byte data = ReadBus(addr);
+
+			switch (res)
+			{
+				case CDLType.None:
+				default:
+					// shouldn't get here
+					break;
+
+				case CDLType.BIOS1:
+					_cdl["BIOS1"][address] = data;
+					break;
+
+				case CDLType.BIOS2:
+					_cdl["BIOS2"][address] = data;
+					break;
+
+				case CDLType.CARTROM:
+					_cdl["ROM"][address] = data;
+					break;
+			}
+
+			// update the system bus as well
+			// because why not
+			_cdl["System Bus"][addr] = data;
+
+			return data;
+		}
+	}
+}

src/BizHawk.Emulation.Cores/Consoles/Fairchild/ChannelF/Memory.cs

@@ -30,6 +30,30 @@ public byte ReadBus(ushort addr)
 			}
 		}
 
+		public CDLResult ReadCDL(ushort addr)
+		{
+			var result = new CDLResult();
+			int divisor = addr / 0x400;
+			result.Address = addr % 0x400;
+
+			switch (divisor)
+			{
+				case 0:
+					result.Type = CDLType.BIOS1;
+					break;
+
+				case 1:
+					result.Type = CDLType.BIOS2;
+					break;
+
+				default:
+					result.Type = CDLType.CARTROM;
+					break;
+			}
+
+			return result;
+		}
+
 		/// <summary>
 		/// Simulates writing a byte of data to the address space (in its default configuration, there is no writeable RAM in the
 		/// Channel F addressable through the address space)