diff --git a/BizHawk.Emulation.Cores/Consoles/Atari/2600/Atari2600.IMemoryDomains.cs b/BizHawk.Emulation.Cores/Consoles/Atari/2600/Atari2600.IMemoryDomains.cs
index 0d8035840a..8c0bf9a303 100644
--- a/BizHawk.Emulation.Cores/Consoles/Atari/2600/Atari2600.IMemoryDomains.cs
+++ b/BizHawk.Emulation.Cores/Consoles/Atari/2600/Atari2600.IMemoryDomains.cs
@@ -15,10 +15,6 @@ namespace BizHawk.Emulation.Cores.Atari.Atari2600
 		{
 			var domains = new List<MemoryDomain>
 			{
-				//new MemoryDomainByteArray(
-				//	"Main RAM",
-				//	MemoryDomain.Endian.Little,
-				//	Ram, true, 1),
 				new MemoryDomainDelegate(
 					"TIA",
 					16,
@@ -39,13 +35,6 @@ namespace BizHawk.Emulation.Cores.Atari.Atari2600
 					(addr, value) => _mapper.PokeMemory((ushort) addr, value), 1) 
 			};
 
-			//if (_mapper is mDPC) // TODO: also mDPCPlus
-			//{
-			//	domains.Add(new MemoryDomainByteArray(
-			//		"DPC",
-			//		MemoryDomain.Endian.Little,(_mapper as mDPC).DspData, true, 1));
-			//}
-
 			if (_mapper.HasCartRam)
 			{
 				domains.Add(new MemoryDomainDelegate(
@@ -59,8 +48,6 @@ namespace BizHawk.Emulation.Cores.Atari.Atari2600
 			SyncAllByteArrayDomains();
 
 			MemoryDomains = new MemoryDomainList(_byteArrayDomains.Values.Concat(domains).ToList());
-			MemoryDomains.MainMemory = _byteArrayDomains["Main RAM"];
-
 			(ServiceProvider as BasicServiceProvider).Register<IMemoryDomains>(MemoryDomains);
 
 			_memoryDomainsInit = true;
diff --git a/BizHawk.Emulation.Cores/Consoles/Coleco/ColecoVision.IMemoryDomains.cs b/BizHawk.Emulation.Cores/Consoles/Coleco/ColecoVision.IMemoryDomains.cs
index 8ba1a19e69..97a064c057 100644
--- a/BizHawk.Emulation.Cores/Consoles/Coleco/ColecoVision.IMemoryDomains.cs
+++ b/BizHawk.Emulation.Cores/Consoles/Coleco/ColecoVision.IMemoryDomains.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Linq;
 
 using BizHawk.Emulation.Common;
 
@@ -8,13 +9,14 @@ namespace BizHawk.Emulation.Cores.ColecoVision
 	public partial class ColecoVision
 	{
 		private MemoryDomainList memoryDomains;
+		private readonly Dictionary<string, MemoryDomainByteArray> _byteArrayDomains = new Dictionary<string, MemoryDomainByteArray>();
+		private bool _memoryDomainsInit = false;
 
 		private void SetupMemoryDomains()
 		{
-			var domains = new List<MemoryDomain>(3);
-			var MainMemoryDomain = new MemoryDomainByteArray("Main RAM", MemoryDomain.Endian.Little, Ram, true, 1);
-			var VRamDomain = new MemoryDomainByteArray("Video RAM", MemoryDomain.Endian.Little, VDP.VRAM, true, 1);
-			var SystemBusDomain = new MemoryDomainDelegate("System Bus", 0x10000, MemoryDomain.Endian.Little,
+			var domains = new List<MemoryDomain>
+			{
+				new MemoryDomainDelegate("System Bus", 0x10000, MemoryDomain.Endian.Little,
 				(addr) =>
 				{
 					if (addr < 0 || addr >= 65536)
@@ -32,13 +34,35 @@ namespace BizHawk.Emulation.Cores.ColecoVision
 					}
 
 					Cpu.WriteMemory((ushort)addr, value);
-				}, 1);
+				}, 1)
+			};
 
-			domains.Add(MainMemoryDomain);
-			domains.Add(VRamDomain);
-			domains.Add(SystemBusDomain);
-			memoryDomains = new MemoryDomainList(domains);
+			SyncAllByteArrayDomains();
+
+			memoryDomains = new MemoryDomainList(_byteArrayDomains.Values.Concat(domains).ToList());
 			(ServiceProvider as BasicServiceProvider).Register<IMemoryDomains>(memoryDomains);
+
+			_memoryDomainsInit = true;
+		}
+
+		private void SyncAllByteArrayDomains()
+		{
+			SyncByteArrayDomain("Main RAM", Ram);
+			SyncByteArrayDomain("Video RAM", VDP.VRAM);
+		}
+
+		private void SyncByteArrayDomain(string name, byte[] data)
+		{
+			if (_memoryDomainsInit)
+			{
+				var m = _byteArrayDomains[name];
+				m.Data = data;
+			}
+			else
+			{
+				var m = new MemoryDomainByteArray(name, MemoryDomain.Endian.Little, data, true, 1);
+				_byteArrayDomains.Add(name, m);
+			}
 		}
 	}
 }
diff --git a/BizHawk.Emulation.Cores/Consoles/Coleco/ColecoVision.IStatable.cs b/BizHawk.Emulation.Cores/Consoles/Coleco/ColecoVision.IStatable.cs
index 1c9e8931fc..0f11d20682 100644
--- a/BizHawk.Emulation.Cores/Consoles/Coleco/ColecoVision.IStatable.cs
+++ b/BizHawk.Emulation.Cores/Consoles/Coleco/ColecoVision.IStatable.cs
@@ -64,6 +64,11 @@ namespace BizHawk.Emulation.Cores.ColecoVision
 			ser.Sync("LagCount", ref _lagCount);
 			ser.Sync("IsLag", ref _isLag);
 			ser.EndSection();
+
+			if (ser.IsReader)
+			{
+				SyncAllByteArrayDomains();
+			}
 		}
 
 		private byte[] _stateBuffer;