diff --git a/Visual Studio Projects/PDP10.vcproj b/Visual Studio Projects/PDP10.vcproj
index d3f0c15c..7665a58d 100644
--- a/Visual Studio Projects/PDP10.vcproj	
+++ b/Visual Studio Projects/PDP10.vcproj	
@@ -41,8 +41,8 @@
 			<Tool
 				Name="VCCLCompilerTool"
 				Optimization="0"
-				AdditionalIncludeDirectories="./;../;../PDP10/;../PDP11/;../VAX/;&quot;../../windows-build/PCRE/include/&quot;"
-				PreprocessorDefinitions="USE_INT64;VM_PDP10;_CRT_NONSTDC_NO_WARNINGS;_CRT_SECURE_NO_WARNINGS;_WINSOCK_DEPRECATED_NO_WARNINGS;SIM_NEED_GIT_COMMIT_ID;HAVE_PCREPOSIX_H;PCRE_STATIC"
+				AdditionalIncludeDirectories="./;../;../PDP10/;../PDP11/;../VAX/;../../windows-build/PCRE/include/;../../windows-build/winpcap/Wpdpack/Include;../../windows-build/pthreads;../slirp;../slirp_glue;../slirp_glue/qemu;../slirp_glue/qemu/win32/include"
+				PreprocessorDefinitions="USE_INT64;VM_PDP10;_CRT_NONSTDC_NO_WARNINGS;_CRT_SECURE_NO_WARNINGS;_WINSOCK_DEPRECATED_NO_WARNINGS;SIM_NEED_GIT_COMMIT_ID;HAVE_PCREPOSIX_H;PCRE_STATIC;USE_SHARED;PTW32_STATIC_LIB;USE_READER_THREAD;HAVE_SLIRP_NETWORK;USE_SIMH_SLIRP_DEBUG"
 				KeepComments="false"
 				MinimalRebuild="true"
 				BasicRuntimeChecks="0"
@@ -64,7 +64,7 @@
 			/>
 			<Tool
 				Name="VCLinkerTool"
-				AdditionalDependencies="wsock32.lib winmm.lib pcrestaticd.lib pcreposixstaticd.lib"
+				AdditionalDependencies="wsock32.lib winmm.lib pcrestaticd.lib pcreposixstaticd.lib Iphlpapi.lib"
 				LinkIncremental="2"
 				AdditionalLibraryDirectories="../../windows-build/PCRE/lib/"
 				GenerateDebugInformation="true"
@@ -125,8 +125,8 @@
 				InlineFunctionExpansion="1"
 				OmitFramePointers="true"
 				WholeProgramOptimization="true"
-				AdditionalIncludeDirectories="./;../;../PDP10/;../PDP11/;../VAX/;&quot;../../windows-build/PCRE/include/&quot;"
-				PreprocessorDefinitions="USE_INT64;VM_PDP10;_CRT_NONSTDC_NO_WARNINGS;_CRT_SECURE_NO_WARNINGS;_WINSOCK_DEPRECATED_NO_WARNINGS;SIM_NEED_GIT_COMMIT_ID;HAVE_PCREPOSIX_H;PCRE_STATIC"
+				AdditionalIncludeDirectories="./;../;../PDP10/;../PDP11/;../VAX/;../../windows-build/PCRE/include/;../../windows-build/winpcap/Wpdpack/Include;../../windows-build/pthreads;../slirp;../slirp_glue;../slirp_glue/qemu;../slirp_glue/qemu/win32/include"
+				PreprocessorDefinitions="USE_INT64;VM_PDP10;_CRT_NONSTDC_NO_WARNINGS;_CRT_SECURE_NO_WARNINGS;_WINSOCK_DEPRECATED_NO_WARNINGS;SIM_NEED_GIT_COMMIT_ID;HAVE_PCREPOSIX_H;PCRE_STATIC;USE_SHARED;PTW32_STATIC_LIB;USE_READER_THREAD;HAVE_SLIRP_NETWORK;USE_SIMH_SLIRP_DEBUG"
 				StringPooling="true"
 				RuntimeLibrary="0"
 				EnableFunctionLevelLinking="true"
@@ -146,7 +146,7 @@
 			/>
 			<Tool
 				Name="VCLinkerTool"
-				AdditionalDependencies="wsock32.lib winmm.lib pcrestatic.lib pcreposixstatic.lib"
+				AdditionalDependencies="wsock32.lib winmm.lib pcrestatic.lib pcreposixstatic.lib Iphlpapi.lib"
 				LinkIncremental="1"
 				AdditionalLibraryDirectories="../../windows-build/PCRE/lib/"
 				GenerateDebugInformation="false"
@@ -266,6 +266,27 @@
 				RelativePath="..\PDP11\pdp11_xu.c"
 				>
 			</File>
+			<File
+				RelativePath="..\..\windows-build\pthreads\pthread.c"
+				>
+				<FileConfiguration
+					Name="Debug|Win32"
+					>
+					<Tool
+						Name="VCCLCompilerTool"
+						PreprocessorDefinitions="HAVE_PTW32_CONFIG_H;PTW32_BUILD_INLINED;PTW32_STATIC_LIB;__CLEANUP_C;$(NOINHERIT)"
+					/>
+				</FileConfiguration>
+				<FileConfiguration
+					Name="Release|Win32"
+					>
+					<Tool
+						Name="VCCLCompilerTool"
+						WholeProgramOptimization="false"
+						PreprocessorDefinitions="HAVE_PTW32_CONFIG_H;PTW32_BUILD_INLINED;PTW32_STATIC_LIB;__CLEANUP_C;$(NOINHERIT)"
+					/>
+				</FileConfiguration>
+			</File>
 			<File
 				RelativePath="..\scp.c"
 				>
@@ -310,6 +331,170 @@
 				RelativePath="..\sim_video.c"
 				>
 			</File>
+			<Filter
+				Name="slirp"
+				>
+				<File
+					RelativePath="..\slirp\arp_table.c"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\bootp.c"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\bootp.h"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\cksum.c"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\debug.h"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\dnssearch.c"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp_glue\glib_qemu_stubs.c"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\if.c"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\if.h"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\ip.h"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\ip_icmp.c"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\ip_icmp.h"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\ip_input.c"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\ip_output.c"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\libslirp.h"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\main.h"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\mbuf.c"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\mbuf.h"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\misc.c"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\misc.h"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\sbuf.c"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\sbuf.h"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp_glue\sim_slirp.c"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\slirp.c"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\slirp.h"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\slirp_config.h"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\socket.c"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\socket.h"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\tcp.h"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\tcp_input.c"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\tcp_output.c"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\tcp_subr.c"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\tcp_timer.c"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\tcp_timer.h"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\tcp_var.h"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\tcpip.h"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\tftp.c"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\tftp.h"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\udp.c"
+					>
+				</File>
+				<File
+					RelativePath="..\slirp\udp.h"
+					>
+				</File>
+			</Filter>
 		</Filter>
 		<Filter
 			Name="Header Files"
diff --git a/descrip.mms b/descrip.mms
index 5db0836e..052b100f 100644
--- a/descrip.mms
+++ b/descrip.mms
@@ -597,7 +597,7 @@ PDP10_SOURCE = $(PDP10_DIR)PDP10_FE.C,\
                $(PDP11_DIR)PDP11_RY.C,$(PDP11_DIR)PDP11_CR.C,\
                $(PDP11_DIR)PDP11_DUP.C,$(PDP11_DIR)PDP11_DMC.C,\
                $(PDP11_DIR)PDP11_KMC.C,$(PDP11_DIR)PDP11_XU.C
-PDP10_OPTIONS = /INCL=($(SIMH_DIR),$(PDP10_DIR),$(PDP11_DIR))\
+PDP10_OPTIONS = /INCL=($(SIMH_DIR),$(PDP10_DIR),$(PDP11_DIR)$(PCAP_INC))\
                 /DEF=($(CC_DEFS),"USE_INT64=1","VM_PDP10=1"$(PCAP_DEFS))
 
 #
diff --git a/makefile b/makefile
index 98ee3abf..06af2b7b 100644
--- a/makefile
+++ b/makefile
@@ -66,8 +66,8 @@ ifneq (,$(findstring besm6,$(MAKECMDGOALS)))
   VIDEO_USEFUL = true
   BESM6_BUILD = true
 endif
-# building the pdp11, or any vax simulator could use networking support
-ifneq (,$(or $(findstring pdp11,$(MAKECMDGOALS)),$(findstring vax,$(MAKECMDGOALS)),$(findstring all,$(MAKECMDGOALS))))
+# building the pdp11, pdp10, or any vax simulator could use networking support
+ifneq (,$(or $(findstring pdp11,$(MAKECMDGOALS)),$(findstring pdp10,$(MAKECMDGOALS)),$(findstring vax,$(MAKECMDGOALS)),$(findstring all,$(MAKECMDGOALS))))
   NETWORK_USEFUL = true
   ifneq (,$(findstring all,$(MAKECMDGOALS))$(word 2,$(MAKECMDGOALS)))
     BUILD_MULTIPLE = s
@@ -1067,7 +1067,7 @@ PDP10 = ${PDP10D}/pdp10_fe.c ${PDP11D}/pdp11_dz.c ${PDP10D}/pdp10_cpu.c \
 	${PDP11D}/pdp11_pt.c ${PDP11D}/pdp11_ry.c ${PDP11D}/pdp11_cr.c \
 	${PDP11D}/pdp11_dup.c ${PDP11D}/pdp11_dmc.c ${PDP11D}/pdp11_kmc.c \
 	${PDP11D}/pdp11_xu.c
-PDP10_OPT = -DVM_PDP10 -DUSE_INT64 -I ${PDP10D} -I ${PDP11D}
+PDP10_OPT = -DVM_PDP10 -DUSE_INT64 -I ${PDP10D} -I ${PDP11D} ${NETWORK_OPT}
 
 
 PDP8D = PDP8