diff --git a/Visual Studio Projects/Simh.sln b/Visual Studio Projects/Simh.sln
index fb63853f..0d07c865 100644
--- a/Visual Studio Projects/Simh.sln	
+++ b/Visual Studio Projects/Simh.sln	
@@ -57,6 +57,8 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "swtp6800mp-a", "swtp6800mp-
 EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "swtp6800mp-a2", "swtp6800mp-a2.vcproj", "{A0BAF350-853E-4A8F-8435-B583E29FFACE}"
 EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "sigma", "sigma.vcproj", "{7DDB6DF6-3837-4DE3-80D7-63181195021F}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Win32 = Debug|Win32
@@ -171,6 +173,12 @@ Global
 		{0ABAF350-853E-4A8F-8435-B583E29FB78C}.Debug|Win32.Build.0 = Debug|Win32
 		{0ABAF350-853E-4A8F-8435-B583E29FB78C}.Release|Win32.ActiveCfg = Release|Win32
 		{0ABAF350-853E-4A8F-8435-B583E29FB78C}.Release|Win32.Build.0 = Release|Win32
+		{A0BAF350-853E-4A8F-8435-B583E29FFACE}.Debug|Win32.ActiveCfg = Debug|Win32
+		{A0BAF350-853E-4A8F-8435-B583E29FFACE}.Release|Win32.ActiveCfg = Release|Win32
+		{7DDB6DF6-3837-4DE3-80D7-63181195021F}.Debug|Win32.ActiveCfg = Debug|Win32
+		{7DDB6DF6-3837-4DE3-80D7-63181195021F}.Debug|Win32.Build.0 = Debug|Win32
+		{7DDB6DF6-3837-4DE3-80D7-63181195021F}.Release|Win32.ActiveCfg = Release|Win32
+		{7DDB6DF6-3837-4DE3-80D7-63181195021F}.Release|Win32.Build.0 = Release|Win32
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
diff --git a/Visual Studio Projects/sigma.vcproj b/Visual Studio Projects/sigma.vcproj
new file mode 100644
index 00000000..cd5735f0
--- /dev/null
+++ b/Visual Studio Projects/sigma.vcproj	
@@ -0,0 +1,351 @@
+<?xml version="1.0" encoding="Windows-1252"?>
+<VisualStudioProject
+	ProjectType="Visual C++"
+	Version="9.00"
+	Name="sigma"
+	ProjectGUID="{7DDB6DF6-3837-4DE3-80D7-63181195021F}"
+	RootNamespace="sigma"
+	Keyword="Win32Proj"
+	TargetFrameworkVersion="131072"
+	>
+	<Platforms>
+		<Platform
+			Name="Win32"
+		/>
+	</Platforms>
+	<ToolFiles>
+	</ToolFiles>
+	<Configurations>
+		<Configuration
+			Name="Debug|Win32"
+			OutputDirectory="..\BIN\NT\$(PlatformName)-$(ConfigurationName)"
+			IntermediateDirectory="..\BIN\NT\Project\simh\$(ProjectName)\$(PlatformName)-$(ConfigurationName)"
+			ConfigurationType="1"
+			InheritedPropertySheets="$(VCInstallDir)VCProjectDefaults\UpgradeFromVC71.vsprops"
+			CharacterSet="0"
+			>
+			<Tool
+				Name="VCPreBuildEventTool"
+			/>
+			<Tool
+				Name="VCCustomBuildTool"
+			/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"
+			/>
+			<Tool
+				Name="VCMIDLTool"
+			/>
+			<Tool
+				Name="VCCLCompilerTool"
+				Optimization="0"
+				AdditionalIncludeDirectories="./;../;../sigma/"
+				PreprocessorDefinitions="_CRT_NONSTDC_NO_WARNINGS;_CRT_SECURE_NO_WARNINGS;_WINSOCK_DEPRECATED_NO_WARNINGS"
+				KeepComments="false"
+				MinimalRebuild="true"
+				BasicRuntimeChecks="0"
+				RuntimeLibrary="1"
+				UsePrecompiledHeader="0"
+				WarningLevel="3"
+				DebugInformationFormat="3"
+				CompileAs="1"
+				ShowIncludes="false"
+			/>
+			<Tool
+				Name="VCManagedResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCPreLinkEventTool"
+			/>
+			<Tool
+				Name="VCLinkerTool"
+				AdditionalDependencies="wsock32.lib winmm.lib"
+				LinkIncremental="2"
+				GenerateDebugInformation="true"
+				SubSystem="1"
+				StackReserveSize="10485760"
+				StackCommitSize="10485760"
+				RandomizedBaseAddress="1"
+				DataExecutionPrevention="0"
+				TargetMachine="1"
+			/>
+			<Tool
+				Name="VCALinkTool"
+			/>
+			<Tool
+				Name="VCManifestTool"
+			/>
+			<Tool
+				Name="VCXDCMakeTool"
+			/>
+			<Tool
+				Name="VCBscMakeTool"
+			/>
+			<Tool
+				Name="VCFxCopTool"
+			/>
+			<Tool
+				Name="VCAppVerifierTool"
+			/>
+			<Tool
+				Name="VCPostBuildEventTool"
+			/>
+		</Configuration>
+		<Configuration
+			Name="Release|Win32"
+			OutputDirectory="..\BIN\NT\$(PlatformName)-$(ConfigurationName)"
+			IntermediateDirectory="..\BIN\NT\Project\simh\$(ProjectName)\$(PlatformName)-$(ConfigurationName)"
+			ConfigurationType="1"
+			InheritedPropertySheets="$(VCInstallDir)VCProjectDefaults\UpgradeFromVC71.vsprops"
+			CharacterSet="0"
+			>
+			<Tool
+				Name="VCPreBuildEventTool"
+			/>
+			<Tool
+				Name="VCCustomBuildTool"
+			/>
+			<Tool
+				Name="VCXMLDataGeneratorTool"
+			/>
+			<Tool
+				Name="VCMIDLTool"
+			/>
+			<Tool
+				Name="VCCLCompilerTool"
+				Optimization="2"
+				InlineFunctionExpansion="1"
+				OmitFramePointers="true"
+				AdditionalIncludeDirectories="./;../;../../sigma/"
+				PreprocessorDefinitions="_CRT_NONSTDC_NO_WARNINGS;_CRT_SECURE_NO_WARNINGS;_WINSOCK_DEPRECATED_NO_WARNINGS"
+				StringPooling="true"
+				RuntimeLibrary="0"
+				EnableFunctionLevelLinking="true"
+				UsePrecompiledHeader="0"
+				WarningLevel="3"
+				DebugInformationFormat="3"
+				CompileAs="1"
+			/>
+			<Tool
+				Name="VCManagedResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCResourceCompilerTool"
+			/>
+			<Tool
+				Name="VCPreLinkEventTool"
+			/>
+			<Tool
+				Name="VCLinkerTool"
+				AdditionalDependencies="wsock32.lib winmm.lib"
+				LinkIncremental="1"
+				GenerateDebugInformation="false"
+				SubSystem="1"
+				StackReserveSize="10485760"
+				StackCommitSize="10485760"
+				OptimizeReferences="2"
+				EnableCOMDATFolding="2"
+				RandomizedBaseAddress="1"
+				DataExecutionPrevention="0"
+				TargetMachine="1"
+			/>
+			<Tool
+				Name="VCALinkTool"
+			/>
+			<Tool
+				Name="VCManifestTool"
+			/>
+			<Tool
+				Name="VCXDCMakeTool"
+			/>
+			<Tool
+				Name="VCBscMakeTool"
+			/>
+			<Tool
+				Name="VCFxCopTool"
+			/>
+			<Tool
+				Name="VCAppVerifierTool"
+			/>
+			<Tool
+				Name="VCPostBuildEventTool"
+			/>
+		</Configuration>
+	</Configurations>
+	<References>
+	</References>
+	<Files>
+		<Filter
+			Name="Source Files"
+			Filter="cpp;c;cxx;def;odl;idl;hpj;bat;asm"
+			>
+			<File
+				RelativePath="..\scp.c"
+				>
+			</File>
+			<File
+				RelativePath="..\sigma\sigma_cis.c"
+				>
+			</File>
+			<File
+				RelativePath="..\sigma\sigma_coc.c"
+				>
+			</File>
+			<File
+				RelativePath="..\sigma\sigma_cpu.c"
+				>
+			</File>
+			<File
+				RelativePath="..\sigma\sigma_dk.c"
+				>
+			</File>
+			<File
+				RelativePath="..\sigma\sigma_dp.c"
+				>
+			</File>
+			<File
+				RelativePath="..\sigma\sigma_fp.c"
+				>
+			</File>
+			<File
+				RelativePath="..\sigma\sigma_io.c"
+				>
+			</File>
+			<File
+				RelativePath="..\sigma\sigma_lp.c"
+				>
+			</File>
+			<File
+				RelativePath="..\sigma\sigma_map.c"
+				>
+			</File>
+			<File
+				RelativePath="..\sigma\sigma_mt.c"
+				>
+			</File>
+			<File
+				RelativePath="..\sigma\sigma_pt.c"
+				>
+			</File>
+			<File
+				RelativePath="..\sigma\sigma_rad.c"
+				>
+			</File>
+			<File
+				RelativePath="..\sigma\sigma_rtc.c"
+				>
+			</File>
+			<File
+				RelativePath="..\sigma\sigma_sys.c"
+				>
+			</File>
+			<File
+				RelativePath="..\sigma\sigma_tt.c"
+				>
+			</File>
+			<File
+				RelativePath="..\sim_console.c"
+				>
+			</File>
+			<File
+				RelativePath="..\sim_ether.c"
+				>
+			</File>
+			<File
+				RelativePath="..\sim_fio.c"
+				>
+			</File>
+			<File
+				RelativePath="..\sim_sock.c"
+				>
+			</File>
+			<File
+				RelativePath="..\sim_tape.c"
+				>
+			</File>
+			<File
+				RelativePath="..\sim_timer.c"
+				>
+			</File>
+			<File
+				RelativePath="..\sim_tmxr.c"
+				>
+			</File>
+		</Filter>
+		<Filter
+			Name="Header Files"
+			Filter="h;hpp;hxx;hm;inl;inc"
+			>
+			<File
+				RelativePath="..\scp.h"
+				>
+			</File>
+			<File
+				RelativePath="..\sigma\sigma_defs.h"
+				>
+			</File>
+			<File
+				RelativePath="..\sigma\sigma_io_defs.h"
+				>
+			</File>
+			<File
+				RelativePath="..\sim_console.h"
+				>
+			</File>
+			<File
+				RelativePath="..\sim_defs.h"
+				>
+			</File>
+			<File
+				RelativePath="..\sim_disk.h"
+				>
+			</File>
+			<File
+				RelativePath="..\sim_ether.h"
+				>
+			</File>
+			<File
+				RelativePath="..\sim_fio.h"
+				>
+			</File>
+			<File
+				RelativePath="..\sim_rev.h"
+				>
+			</File>
+			<File
+				RelativePath="..\sim_serial.h"
+				>
+			</File>
+			<File
+				RelativePath="..\sim_sock.h"
+				>
+			</File>
+			<File
+				RelativePath="..\sim_tape.h"
+				>
+			</File>
+			<File
+				RelativePath="..\sim_timer.h"
+				>
+			</File>
+			<File
+				RelativePath="..\sim_tmxr.h"
+				>
+			</File>
+			<File
+				RelativePath="..\sim_video.h"
+				>
+			</File>
+		</Filter>
+		<Filter
+			Name="Resource Files"
+			Filter="rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe"
+			>
+		</Filter>
+	</Files>
+	<Globals>
+	</Globals>
+</VisualStudioProject>