Atari 2600 - implement the Cart Ram memory domain

BizHawk.Emulation.Cores/Consoles/Atari/2600/Atari2600.cs

@@ -72,6 +72,16 @@ namespace BizHawk.Emulation.Cores.Atari.Atari2600
 					(addr, value) => (_mapper as mDPC).DspData[addr] = value));
 			}
 
+			if (_mapper.HasCartRam)
+			{
+				domains.Add(new MemoryDomain(
+					"Cart Ram",
+					_mapper.CartRam.Len,
+					MemoryDomain.Endian.Little,
+					addr => _mapper.CartRam[addr],
+					(addr, value) => _mapper.CartRam[addr] = value));
+			}
+
 			MemoryDomains = new MemoryDomainList(domains);
 		}
 

BizHawk.Emulation.Cores/Consoles/Atari/2600/Mappers/MapperBase.cs

@@ -6,6 +6,16 @@ namespace BizHawk.Emulation.Cores.Atari.Atari2600
 	{
 		public Atari2600 Core { get; set; }
 
+		public virtual bool HasCartRam
+		{
+			get { return false; }
+		}
+
+		public virtual ByteBuffer CartRam
+		{
+			get { return new ByteBuffer(0); }
+		}
+
 		public virtual byte ReadMemory(ushort addr)
 		{
 			return Core.BaseReadMemory(addr);
@@ -28,5 +38,6 @@ namespace BizHawk.Emulation.Cores.Atari.Atari2600
 		public virtual void ClockCpu() { }
 
 		public virtual void HardReset() { }
+
 	}
 }

BizHawk.Emulation.Cores/Consoles/Atari/2600/Mappers/m3E.cs

@@ -27,6 +27,16 @@ namespace BizHawk.Emulation.Cores.Atari.Atari2600
 		private bool _hasRam;
 		private ByteBuffer _ram = new ByteBuffer(256 * 1024); // Up to 256k
 
+		public override bool HasCartRam
+		{
+			get { return true; }
+		}
+
+		public override ByteBuffer CartRam
+		{
+			get { return _ram; }
+		}
+
 		public override void SyncState(Serializer ser)
 		{
 			base.SyncState(ser);

BizHawk.Emulation.Cores/Consoles/Atari/2600/Mappers/m4A50.cs

@@ -42,6 +42,16 @@ namespace BizHawk.Emulation.Cores.Atari.Atari2600
 		private int _mySliceLow;
 		private int _mySliceMiddle;
 
+		public override bool HasCartRam
+		{
+			get { return true; }
+		}
+
+		public override ByteBuffer CartRam
+		{
+			get { return _myRam; }
+		}
+
 		public override byte ReadMemory(ushort addr)
 		{
 			byte val = 0;

BizHawk.Emulation.Cores/Consoles/Atari/2600/Mappers/mAR.cs

@@ -21,6 +21,16 @@ namespace BizHawk.Emulation.Cores.Atari.Atari2600
 			throw new NotImplementedException();
 		}
 
+		public override bool HasCartRam
+		{
+			get { return true; }
+		}
+
+		public override ByteBuffer CartRam
+		{
+			get { return _ram; }
+		}
+
 		public override void SyncState(Serializer ser)
 		{
 			base.SyncState(ser);

BizHawk.Emulation.Cores/Consoles/Atari/2600/Mappers/mCV.cs

@@ -20,6 +20,16 @@ namespace BizHawk.Emulation.Cores.Atari.Atari2600
 	{
 		private ByteBuffer _ram = new ByteBuffer(1024);
 
+		public override bool HasCartRam
+		{
+			get { return true; }
+		}
+
+		public override ByteBuffer CartRam
+		{
+			get { return _ram; }
+		}
+
 		public override void SyncState(Serializer ser)
 		{
 			base.SyncState(ser);

BizHawk.Emulation.Cores/Consoles/Atari/2600/Mappers/mEFSC.cs

@@ -12,6 +12,16 @@ namespace BizHawk.Emulation.Cores.Atari.Atari2600
 		private int _bank4k;
 		private ByteBuffer _ram = new ByteBuffer(128);
 
+		public override bool HasCartRam
+		{
+			get { return true; }
+		}
+
+		public override ByteBuffer CartRam
+		{
+			get { return _ram; }
+		}
+
 		public override void SyncState(Serializer ser)
 		{
 			base.SyncState(ser);

BizHawk.Emulation.Cores/Consoles/Atari/2600/Mappers/mF4SC.cs

@@ -11,6 +11,16 @@ namespace BizHawk.Emulation.Cores.Atari.Atari2600
 		private int _bank4k;
 		private ByteBuffer _ram = new ByteBuffer(128);
 
+		public override bool HasCartRam
+		{
+			get { return true; }
+		}
+
+		public override ByteBuffer CartRam
+		{
+			get { return _ram; }
+		}
+
 		public override void SyncState(Serializer ser)
 		{
 			base.SyncState(ser);

BizHawk.Emulation.Cores/Consoles/Atari/2600/Mappers/mF6SC.cs

@@ -11,6 +11,16 @@ namespace BizHawk.Emulation.Cores.Atari.Atari2600
 		private int _bank4k;
 		private ByteBuffer _ram = new ByteBuffer(128);
 
+		public override bool HasCartRam
+		{
+			get { return true; }
+		}
+
+		public override ByteBuffer CartRam
+		{
+			get { return _ram; }
+		}
+
 		public override void SyncState(Serializer ser)
 		{
 			base.SyncState(ser);

BizHawk.Emulation.Cores/Consoles/Atari/2600/Mappers/mF8SC.cs

@@ -11,6 +11,16 @@ namespace BizHawk.Emulation.Cores.Atari.Atari2600
 		private int _bank_4K;
 		private ByteBuffer _ram = new ByteBuffer(128);
 
+		public override bool HasCartRam
+		{
+			get { return true; }
+		}
+
+		public override ByteBuffer CartRam
+		{
+			get { return _ram; }
+		}
+
 		public override void HardReset()
 		{
 			_bank_4K = 0;

BizHawk.Emulation.Cores/Consoles/Atari/2600/Mappers/mFA2.cs

@@ -13,6 +13,16 @@ namespace BizHawk.Emulation.Cores.Atari.Atari2600
 		private int _bank4k;
 		private ByteBuffer _ram = new ByteBuffer(256);
 
+		public override bool HasCartRam
+		{
+			get { return true; }
+		}
+
+		public override ByteBuffer CartRam
+		{
+			get { return _ram; }
+		}
+
 		public override void SyncState(Serializer ser)
 		{
 			base.SyncState(ser);