diff --git a/.gitmodules b/.gitmodules
index d6c82002c..f1485df68 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -46,3 +46,6 @@
 [submodule "tools/chaosnet-tools"]
 	path = tools/chaosnet-tools
 	url = https://github.com/Chaosnet/chaosnet-tools
+[submodule "tools/ncp"]
+	path = tools/ncp
+	url = https://github.com/larsbrinkhoff/linux-ncp
diff --git a/Makefile b/Makefile
index f867650ec..344865d77 100644
--- a/Makefile
+++ b/Makefile
@@ -80,7 +80,7 @@ BINIGNORE=-e '^(ka10|kl10|ks10|minsys)$$'
 SRCIGNORE=-e '^(system|midas)$$'
 
 SUBMODULES = dasm itstar klh10 mldev simh sims supdup cbridge \
-	tapeutils tv11 pdp6 vt05 tek4010 chaosnet-tools
+	tapeutils tv11 pdp6 vt05 tek4010 chaosnet-tools ncp
 
 # These files are used to create bootable tape images.
 RAM = bin/ks10/boot/ram.262
@@ -106,6 +106,7 @@ VT52=tools/vt05/vt52
 TEK=tools/tek4010/tek4010
 SIMH_IMLAC=tools/simh/BIN/imlac $(OUT)/ssv22.iml
 IMP=tools/simh/BIN/h316
+NCPD=tools/ncp/src/ncpd
 
 H3TEXT=$(shell cd build; ls h3text.*)
 NAMES=$(shell cd build; ls names.*)
@@ -157,7 +158,7 @@ out/pdp10-ka/stamp/its: $(OUT)/rp03.2 $(OUT)/rp03.3
 	$(MKDIR) $(OUT)/stamp
 	$(TOUCH) $@
 
-out/pdp10-ka/stamp/emulators: $(GT40) $(TV11) $(XGP11) $(PDP6) $(DATAPOINT) $(VT52) $(TEK) $(SIMH_IMLAC) $(IMP)
+out/pdp10-ka/stamp/emulators: $(GT40) $(TV11) $(XGP11) $(PDP6) $(DATAPOINT) $(VT52) $(TEK) $(SIMH_IMLAC) $(IMP) $(NCPD)
 	$(MKDIR) $(OUT)/stamp
 	$(TOUCH) $@
 
@@ -165,7 +166,7 @@ out/pdp10-kl/stamp/its: $(OUT)/rp04.1
 	$(MKDIR) $(OUT)/stamp
 	$(TOUCH) $@
 
-out/pdp10-kl/stamp/emulators: $(VT52) $(TEK) $(IMP)
+out/pdp10-kl/stamp/emulators: $(VT52) $(TEK) $(IMP) $(NCPD)
 	$(MKDIR) $(OUT)/stamp
 	$(TOUCH) $@
 
@@ -444,6 +445,10 @@ $(TEK): tek-hack
 $(IMP):
 	$(MAKE) -C tools/simh h316
 
+$(NCPD):
+	$(MAKE) -C tools/ncp/src
+	$(MAKE) -C tools/ncp/apps
+
 tools/supdup/supdup:
 	$(MAKE) -C tools/supdup
 
diff --git a/build/arpanet/imp62.simh b/build/arpanet/imp62.simh
index 16b0cd452..671d80719 100644
--- a/build/arpanet/imp62.simh
+++ b/build/arpanet/imp62.simh
@@ -9,6 +9,7 @@ set hi1 enabled
 set hi2 enabled
 
 attach -u mi1 4421::4431
+attach -u hi1 33003:localhost:33004
 attach -u hi2 33001:localhost:33002
 set hi2 convert
 
diff --git a/build/pdp10-ka/start b/build/pdp10-ka/start
index cc3e93392..f4ac0351c 100755
--- a/build/pdp10-ka/start
+++ b/build/pdp10-ka/start
@@ -96,6 +96,11 @@ arpanet() {
 
     (sleep 2; cd build/arpanet; ../../tools/simh/BIN/h316 imp62.simh >imp62.log 2>&1) &
     started "Arpanet IMP" "$!"
+
+    export NCP="$PWD/ncp076"
+    rm -f "$NCP"
+    (sleep 5; ./tools/ncp/src/ncpd localhost 33003 33004 2>ncp076.log) &
+    started "Local NCP daemon" "$!"
 }
 
 help() {
diff --git a/build/pdp10-kl/start b/build/pdp10-kl/start
index 37a3a8ff1..c6b95c2d6 100755
--- a/build/pdp10-kl/start
+++ b/build/pdp10-kl/start
@@ -49,6 +49,11 @@ arpanet() {
 
     (sleep 2; cd build/arpanet; ../../tools/simh/BIN/h316 imp62.simh >imp62.log 2>&1) &
     started "Arpanet IMP" "$!"
+
+    export NCP="$PWD/ncp076"
+    rm -f "$NCP"
+    (sleep 5; ../linux-ncp/src/ncpd localhost 33003 33004 2>ncp076.log) &
+    started "Local NCP daemon" "$!"
 }
 
 help() {
diff --git a/tools/ncp b/tools/ncp
new file mode 160000
index 000000000..6b31aa221
--- /dev/null
+++ b/tools/ncp
@@ -0,0 +1 @@
+Subproject commit 6b31aa22185e1e461e87b5f2f22d475598bb4b31