diff --git a/BizHawk.Emulation.Cores/Calculator/TI83.IMemoryDomains.cs b/BizHawk.Emulation.Cores/Calculator/TI83.IMemoryDomains.cs
index a5e72555a9..bac3d10f71 100644
--- a/BizHawk.Emulation.Cores/Calculator/TI83.IMemoryDomains.cs
+++ b/BizHawk.Emulation.Cores/Calculator/TI83.IMemoryDomains.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Linq;
 
 using BizHawk.Emulation.Common;
 
@@ -7,12 +8,13 @@ namespace BizHawk.Emulation.Cores.Calculators
 {
 	public partial class TI83
 	{
+		private IMemoryDomains _memoryDomains;
+		private readonly Dictionary<string, MemoryDomainByteArray> _byteArrayDomains = new Dictionary<string, MemoryDomainByteArray>();
+		private bool _memoryDomainsInit = false;
+
 		private void SetupMemoryDomains()
 		{
-			var domains = new List<MemoryDomain>
-			{
-				MemoryDomain.FromByteArray("Main RAM", MemoryDomain.Endian.Little, _ram)
-			};
+			var domains = new List<MemoryDomain>();
 
 			var systemBusDomain = new MemoryDomainDelegate("System Bus", 0x10000, MemoryDomain.Endian.Little,
 				(addr) =>
@@ -30,10 +32,31 @@ namespace BizHawk.Emulation.Cores.Calculators
 
 			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 IMemoryDomains _memoryDomains;
+		private void SyncAllByteArrayDomains()
+		{
+			SyncByteArrayDomain("Main RAM", _ram);
+		}
+
+		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/Calculator/TI83.IStatable.cs b/BizHawk.Emulation.Cores/Calculator/TI83.IStatable.cs
index 2eb6f0277a..b63f2ac4fa 100644
--- a/BizHawk.Emulation.Cores/Calculator/TI83.IStatable.cs
+++ b/BizHawk.Emulation.Cores/Calculator/TI83.IStatable.cs
@@ -76,6 +76,11 @@ namespace BizHawk.Emulation.Cores.Calculators
 			ser.Sync("LagCount", ref _lagCount);
 			ser.Sync("IsLag", ref _isLag);
 			ser.EndSection();
+
+			if (ser.IsReader)
+			{
+				SyncAllByteArrayDomains();
+			}
 		}
 	}
 }