diff --git a/BizHawk.Client.Common/lua/EmuLuaLibrary.MainMemory.cs b/BizHawk.Client.Common/lua/EmuLuaLibrary.MainMemory.cs
index 9817ee615d..c4bef7ce38 100644
--- a/BizHawk.Client.Common/lua/EmuLuaLibrary.MainMemory.cs
+++ b/BizHawk.Client.Common/lua/EmuLuaLibrary.MainMemory.cs
@@ -24,7 +24,7 @@ namespace BizHawk.Client.Common
 			{
 				if (Global.Emulator.HasMemoryDomains())
 				{
-					return (Global.Emulator as IMemoryDomains).MemoryDomains.MainMemory;
+					return Global.Emulator.AsMemoryDomains().MemoryDomains.MainMemory;
 				}
 				else
 				{
diff --git a/BizHawk.Client.Common/lua/EmuLuaLibrary.Memory.cs b/BizHawk.Client.Common/lua/EmuLuaLibrary.Memory.cs
index c8021371f4..9520e2f90c 100644
--- a/BizHawk.Client.Common/lua/EmuLuaLibrary.Memory.cs
+++ b/BizHawk.Client.Common/lua/EmuLuaLibrary.Memory.cs
@@ -17,7 +17,7 @@ namespace BizHawk.Client.Common
 		{
 			if (Global.Emulator.HasMemoryDomains())
 			{
-				var domains = (Global.Emulator as IMemoryDomains).MemoryDomains;
+				var domains = Global.Emulator.AsMemoryDomains().MemoryDomains;
 				_currentMemoryDomain = domains.IndexOf(domains.MainMemory);
 			}
 		}
@@ -27,7 +27,7 @@ namespace BizHawk.Client.Common
 		{
 			if (Global.Emulator.HasMemoryDomains())
 			{
-				var domains = (Global.Emulator as IMemoryDomains).MemoryDomains;
+				var domains = Global.Emulator.AsMemoryDomains().MemoryDomains;
 				_currentMemoryDomain = domains.IndexOf(domains.MainMemory);
 			}
 		}
@@ -40,7 +40,7 @@ namespace BizHawk.Client.Common
 			{
 				if (Global.Emulator.HasMemoryDomains())
 				{
-					return (Global.Emulator as IMemoryDomains).MemoryDomains[_currentMemoryDomain];
+					return Global.Emulator.AsMemoryDomains().MemoryDomains[_currentMemoryDomain];
 				}
 				else
 				{
diff --git a/BizHawk.Client.Common/lua/EmuLuaLibrary.NES.cs b/BizHawk.Client.Common/lua/EmuLuaLibrary.NES.cs
index 9af571ed53..bb93501254 100644
--- a/BizHawk.Client.Common/lua/EmuLuaLibrary.NES.cs
+++ b/BizHawk.Client.Common/lua/EmuLuaLibrary.NES.cs
@@ -4,6 +4,7 @@ using System.Linq;
 
 using LuaInterface;
 using BizHawk.Emulation.Common;
+using BizHawk.Emulation.Common.IEmulatorExtensions;
 using BizHawk.Emulation.Cores.Nintendo.NES;
 using BizHawk.Emulation.Cores.Consoles.Nintendo.QuickNES;
 
@@ -34,7 +35,7 @@ namespace BizHawk.Client.Common
 			{
 				var decoder = new NESGameGenieDecoder(code);
 				var watch = Watch.GenerateWatch(
-					(Global.Emulator as IMemoryDomains).MemoryDomains["System Bus"],
+					Global.Emulator.AsMemoryDomains().MemoryDomains["System Bus"],
 					decoder.Address,
 					Watch.WatchSize.Byte,
 					Watch.DisplayType.Hex,
diff --git a/BizHawk.Client.Common/lua/LuaMemoryBase.cs b/BizHawk.Client.Common/lua/LuaMemoryBase.cs
index 6877008c84..457b57222c 100644
--- a/BizHawk.Client.Common/lua/LuaMemoryBase.cs
+++ b/BizHawk.Client.Common/lua/LuaMemoryBase.cs
@@ -24,7 +24,7 @@ namespace BizHawk.Client.Common
 			{
 				if (Global.Emulator.HasMemoryDomains())
 				{
-					return (Global.Emulator as IMemoryDomains).MemoryDomains;
+					return Global.Emulator.AsMemoryDomains().MemoryDomains;
 				}
 				else
 				{
diff --git a/BizHawk.Client.Common/tools/CheatList.cs b/BizHawk.Client.Common/tools/CheatList.cs
index 4a4e61661f..ac05627548 100644
--- a/BizHawk.Client.Common/tools/CheatList.cs
+++ b/BizHawk.Client.Common/tools/CheatList.cs
@@ -6,6 +6,7 @@ using System.Linq;
 using System.Text;
 
 using BizHawk.Emulation.Common;
+using BizHawk.Emulation.Common.IEmulatorExtensions;
 
 namespace BizHawk.Client.Common
 {
@@ -456,7 +457,7 @@ namespace BizHawk.Client.Common
 								compare = int.Parse(vals[2], NumberStyles.HexNumber);
 							}
 
-							var domain = (Global.Emulator as IMemoryDomains).MemoryDomains[vals[3]];
+							var domain = Global.Emulator.AsMemoryDomains().MemoryDomains[vals[3]];
 							var enabled = vals[4] == "1";
 							var name = vals[5];
 
diff --git a/BizHawk.Client.Common/tools/RamSearchEngine.cs b/BizHawk.Client.Common/tools/RamSearchEngine.cs
index 2e4cdf759c..4e577474c9 100644
--- a/BizHawk.Client.Common/tools/RamSearchEngine.cs
+++ b/BizHawk.Client.Common/tools/RamSearchEngine.cs
@@ -5,6 +5,7 @@ using System.Linq;
 using BizHawk.Common;
 using BizHawk.Common.CollectionExtensions;
 using BizHawk.Emulation.Common;
+using BizHawk.Emulation.Common.IEmulatorExtensions;
 
 namespace BizHawk.Client.Common
 {
@@ -27,7 +28,7 @@ namespace BizHawk.Client.Common
 
 		public RamSearchEngine(Settings settings)
 		{
-			_settings = new Settings((IMemoryDomains)Global.Emulator);
+			_settings = new Settings(Global.Emulator.AsMemoryDomains());
 			_settings.Mode = settings.Mode;
 			_settings.Domain = settings.Domain;
 			_settings.Size = settings.Size;
diff --git a/BizHawk.Client.EmuHawk/tools/GB/GBGameGenie.cs b/BizHawk.Client.EmuHawk/tools/GB/GBGameGenie.cs
index 734b5c9d0b..2f4b27d5c5 100644
--- a/BizHawk.Client.EmuHawk/tools/GB/GBGameGenie.cs
+++ b/BizHawk.Client.EmuHawk/tools/GB/GBGameGenie.cs
@@ -5,6 +5,7 @@ using System.Text.RegularExpressions;
 using System.Windows.Forms;
 
 using BizHawk.Emulation.Common;
+using BizHawk.Emulation.Common.IEmulatorExtensions;
 using BizHawk.Client.Common;
 
 namespace BizHawk.Client.EmuHawk
@@ -296,7 +297,7 @@ namespace BizHawk.Client.EmuHawk
 				}
 
 				var watch = Watch.GenerateWatch(
-					(Global.Emulator as IMemoryDomains).MemoryDomains["System Bus"],
+					Global.Emulator.AsMemoryDomains().MemoryDomains["System Bus"],
 					address,
 					Watch.WatchSize.Byte,
 					Watch.DisplayType.Hex,
diff --git a/BizHawk.Client.EmuHawk/tools/Genesis/GenGameGenie.cs b/BizHawk.Client.EmuHawk/tools/Genesis/GenGameGenie.cs
index 5f2894cab7..01ba0533aa 100644
--- a/BizHawk.Client.EmuHawk/tools/Genesis/GenGameGenie.cs
+++ b/BizHawk.Client.EmuHawk/tools/Genesis/GenGameGenie.cs
@@ -5,6 +5,7 @@ using System.Text.RegularExpressions;
 using System.Windows.Forms;
 
 using BizHawk.Emulation.Common;
+using BizHawk.Emulation.Common.IEmulatorExtensions;
 using BizHawk.Client.Common;
 
 #pragma warning disable 675 //TOOD: fix the potential problem this is masking
@@ -357,7 +358,7 @@ namespace BizHawk.Client.EmuHawk
 			}
 
 			var watch = Watch.GenerateWatch(
-				(Global.Emulator as IMemoryDomains).MemoryDomains["MD CART"],
+				Global.Emulator.AsMemoryDomains().MemoryDomains["MD CART"],
 				address,
 				Watch.WatchSize.Word,
 				Watch.DisplayType.Hex,
diff --git a/BizHawk.Client.EmuHawk/tools/NES/NESGameGenie.cs b/BizHawk.Client.EmuHawk/tools/NES/NESGameGenie.cs
index b0d7d887c7..e663dd2445 100644
--- a/BizHawk.Client.EmuHawk/tools/NES/NESGameGenie.cs
+++ b/BizHawk.Client.EmuHawk/tools/NES/NESGameGenie.cs
@@ -4,6 +4,7 @@ using System.Globalization;
 using System.Windows.Forms;
 
 using BizHawk.Emulation.Common;
+using BizHawk.Emulation.Common.IEmulatorExtensions;
 using BizHawk.Client.Common;
 
 namespace BizHawk.Client.EmuHawk
@@ -231,7 +232,7 @@ namespace BizHawk.Client.EmuHawk
 			if (!string.IsNullOrWhiteSpace(AddressBox.Text) && !string.IsNullOrWhiteSpace(ValueBox.Text))
 			{
 				var watch = Watch.GenerateWatch(
-					(Global.Emulator as IMemoryDomains).MemoryDomains["System Bus"],
+					Global.Emulator.AsMemoryDomains().MemoryDomains["System Bus"],
 					AddressBox.ToRawInt().Value,
 					Watch.WatchSize.Byte,
 					Watch.DisplayType.Hex,
diff --git a/BizHawk.Client.EmuHawk/tools/PCE/PCECDL.cs b/BizHawk.Client.EmuHawk/tools/PCE/PCECDL.cs
index a119b7742f..5a48d25d3e 100644
--- a/BizHawk.Client.EmuHawk/tools/PCE/PCECDL.cs
+++ b/BizHawk.Client.EmuHawk/tools/PCE/PCECDL.cs
@@ -5,6 +5,7 @@ using System.IO;
 using System.Windows.Forms;
 
 using BizHawk.Emulation.Common;
+using BizHawk.Emulation.Common.IEmulatorExtensions;
 using BizHawk.Emulation.Cores.Components.H6280;
 using BizHawk.Emulation.Cores.PCEngine;
 
@@ -304,7 +305,7 @@ namespace BizHawk.Client.EmuHawk
 				{
 					using (var fs = new FileStream(sfd.FileName, FileMode.Create, FileAccess.Write))
 					{
-						_cdl.Disassemble(fs, (Global.Emulator as IMemoryDomains).MemoryDomains);
+						_cdl.Disassemble(fs, Global.Emulator.AsMemoryDomains().MemoryDomains);
 					}
 				}
 			}
diff --git a/BizHawk.Client.EmuHawk/tools/SNES/SNESGameGenie.cs b/BizHawk.Client.EmuHawk/tools/SNES/SNESGameGenie.cs
index 446cdc6a20..c2351d705b 100644
--- a/BizHawk.Client.EmuHawk/tools/SNES/SNESGameGenie.cs
+++ b/BizHawk.Client.EmuHawk/tools/SNES/SNESGameGenie.cs
@@ -5,6 +5,7 @@ using System.Text.RegularExpressions;
 using System.Windows.Forms;
 
 using BizHawk.Emulation.Common;
+using BizHawk.Emulation.Common.IEmulatorExtensions;
 using BizHawk.Emulation.Cores.Nintendo.SNES;
 using BizHawk.Client.Common;
 
@@ -275,7 +276,7 @@ namespace BizHawk.Client.EmuHawk
 				}
 
 				var watch = Watch.GenerateWatch(
-					(Global.Emulator as IMemoryDomains).MemoryDomains["BUS"],
+					Global.Emulator.AsMemoryDomains().MemoryDomains["BUS"],
 					address,
 					Watch.WatchSize.Byte,
 					Watch.DisplayType.Hex,
diff --git a/BizHawk.Client.EmuHawk/tools/TraceLogger.cs b/BizHawk.Client.EmuHawk/tools/TraceLogger.cs
index b7d0b384a3..b0b13b2871 100644
--- a/BizHawk.Client.EmuHawk/tools/TraceLogger.cs
+++ b/BizHawk.Client.EmuHawk/tools/TraceLogger.cs
@@ -38,7 +38,7 @@ namespace BizHawk.Client.EmuHawk
 
 			if (Global.Emulator.CpuTraceAvailable())
 			{
-				Tracer = Global.Emulator.GetDebugger().Tracer;
+				Tracer = Global.Emulator.AsDebuggable().Tracer;
 			}
 			else
 			{
diff --git a/BizHawk.Emulation.Common/Extensions.cs b/BizHawk.Emulation.Common/Extensions.cs
index 48563a1d26..5e17487a82 100644
--- a/BizHawk.Emulation.Common/Extensions.cs
+++ b/BizHawk.Emulation.Common/Extensions.cs
@@ -22,7 +22,7 @@ namespace BizHawk.Emulation.Common.IEmulatorExtensions
 			return core != null && core.ServiceProvider.HasService<IMemoryDomains>();
 		}
 
-		public static IMemoryDomains GetMemoryDomains(this IEmulator core)
+		public static IMemoryDomains AsMemoryDomains(this IEmulator core)
 		{
 			return (IMemoryDomains)core.ServiceProvider.GetService<IMemoryDomains>();
 		}
@@ -32,16 +32,31 @@ namespace BizHawk.Emulation.Common.IEmulatorExtensions
 			return core != null && core.ServiceProvider.HasService<ISaveRam>();
 		}
 
+		public static ISaveRam AsSaveRam(this IEmulator core)
+		{
+			return (ISaveRam)core.ServiceProvider.GetService<ISaveRam>();
+		}
+
 		public static bool HasSavestates(this IEmulator core)
 		{
 			return core != null && core.ServiceProvider.HasService<IStatable>();
 		}
 
+		public static IStatable AsStatable(this IEmulator core)
+		{
+			return (IStatable)core.ServiceProvider.GetService<IStatable>();
+		}
+
 		public static bool CanPollInput(this IEmulator core)
 		{
 			return core != null && core.ServiceProvider.HasService<IInputPollable>();
 		}
 
+		public static IInputPollable AsInputPollable(this IEmulator core)
+		{
+			return (IInputPollable)core.ServiceProvider.GetService<IInputPollable>();
+		}
+
 		public static bool CpuTraceAvailable(this IEmulator core)
 		{
 			// TODO: this is a pretty ugly way to handle this
@@ -67,7 +82,7 @@ namespace BizHawk.Emulation.Common.IEmulatorExtensions
 			return core.ServiceProvider.HasService<IDebuggable>();
 		}
 
-		public static IDebuggable GetDebugger(this IEmulator core)
+		public static IDebuggable AsDebuggable(this IEmulator core)
 		{
 			return (IDebuggable)core.ServiceProvider.GetService<IDebuggable>();
 		}