diff --git a/.circleci/config.yml b/.circleci/config.yml
index 7f5e2349..5169ac8a 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -4,7 +4,7 @@ jobs:
     docker:
       - image: debian
     environment:
-      EMULATOR: "sims"
+      EMULATOR: "pdp10-ka"
     steps:
       - checkout
       - run: sh -ex build/dependencies.sh install_linux
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index c440051e..c076bc42 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,7 +1,7 @@
 image: ubuntu
 
 variables:
-  EMULATOR: sims
+  EMULATOR: pdp10-ka
 
 stages:
   - build
@@ -13,4 +13,4 @@ job1:
     - make
   artifacts:
     paths:
-      - out/sims/
+      - out/pdp10-ka/
diff --git a/.travis.yml b/.travis.yml
index d8f832a6..df210b87 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,13 +7,13 @@ sudo: required
 env:
   - EMULATOR=simh BASICS=yes
   - EMULATOR=klh10 BASICS=yes
-  - EMULATOR=sims BASICS=yes
+  - EMULATOR=pdp10-ka BASICS=yes
 matrix:
   exclude:
     - os: osx
       env: EMULATOR=klh10 BASICS=yes
     - os: osx
-      env: EMULATOR=sims BASICS=yes
+      env: EMULATOR=pdp10-ka BASICS=yes
 install: sh -ex build/dependencies.sh install_${TRAVIS_OS_NAME:-linux}
 script: make check-dirs all
 deploy:
diff --git a/Makefile b/Makefile
index e26a5c98..35be68fd 100644
--- a/Makefile
+++ b/Makefile
@@ -56,7 +56,7 @@ DSKDMP = bin/ks10/boot/dskdmp.rp06
 
 KLH10=tools/klh10/tmp/bld-ks-its/kn10-ks-its
 SIMH=tools/simh/BIN/pdp10
-KA10=tools/sims/BIN/ka10
+KA10=tools/sims/BIN/pdp10-ka
 ITSTAR=tools/itstar/itstar
 WRITETAPE=tools/tapeutils/tapewrite
 MAGFRM=tools/dasm/magfrm
@@ -82,7 +82,7 @@ out/klh10/stamp: $(OUT)/rp0.dsk
 out/simh/stamp: $(OUT)/rp0.dsk $(GT40)
 	$(TOUCH) $@
 
-out/sims/stamp: $(OUT)/rp03.2 $(OUT)/rp03.3 $(GT40) $(TV11) $(PDP6)
+out/pdp10-ka/stamp: $(OUT)/rp03.2 $(OUT)/rp03.3 $(GT40) $(TV11) $(PDP6)
 	$(TOUCH) $@
 
 $(OUT)/rp0.dsk: build/simh/init $(OUT)/minsys.tape $(OUT)/minsrc.tape $(OUT)/salv.tape $(OUT)/dskdmp.tape build/build.tcl $(OUT)/sources.tape build/$(EMULATOR)/stamp
@@ -153,7 +153,7 @@ build/klh10/stamp: $(KLH10) start build/klh10/dskdmp.ini
 build/simh/stamp: $(SIMH) start
 	$(TOUCH) $@
 
-build/sims/stamp: $(KA10) start
+build/pdp10-ka/stamp: $(KA10) start
 	$(TOUCH) $@
 
 out/klh10/system:
@@ -170,9 +170,9 @@ out/simh/system:
 	$(MKDIR) $(OUT)/system
 	cp build/simh/config.* $(OUT)/system
 
-out/sims/system:
+out/pdp10-ka/system:
 	$(MKDIR) $(OUT)/system
-	cp build/sims/config.* $(OUT)/system
+	cp build/pdp10-ka/config.* $(OUT)/system
 
 build/klh10/dskdmp.ini: build/klh10/dskdmp.txt Makefile
 	cp=';'; ca=''; \
@@ -205,7 +205,7 @@ $(SIMH):
 	$(MAKE) -C tools/simh pdp10
 
 $(KA10):
-	$(MAKE) -C tools/sims ka10 TYPE340=y
+	$(MAKE) -C tools/sims pdp10-ka TYPE340=y
 
 $(ITSTAR):
 	$(MAKE) -C tools/itstar
diff --git a/README.md b/README.md
index 30beaa6a..5c56ad31 100644
--- a/README.md
+++ b/README.md
@@ -53,7 +53,7 @@ we'd be delighted to test this on a real KS10.
 To build ITS with this repository, you need some tools installed:
 make, C compiler, and expect.  For KA10, you also need SDL or SDL2 for
 the Type 340 display.  Ensure all submodules are checked out, and then
-type `make EMULATOR=simh`, `make EMULATOR=sims`, or `make
+type `make EMULATOR=simh`, `make EMULATOR=pdp10-ka`, or `make
 EMULATOR=klh10`.  This will leave built files in the `out` directory,
 one of which is a disk image with ITS installed.
 
diff --git a/build/dependencies.sh b/build/dependencies.sh
index 67f084a6..1f550bc7 100644
--- a/build/dependencies.sh
+++ b/build/dependencies.sh
@@ -11,7 +11,7 @@ install_linux() {
     sudo apt-get install -my git make gcc libncurses-dev autoconf
     case "$EMULATOR" in
         simh) sudo apt-get install -y simh;;
-        sims) sudo apt-get install -y libegl1-mesa-dev libgles2-mesa-dev
+        pdp10-ka) sudo apt-get install -y libegl1-mesa-dev libgles2-mesa-dev
               sudo apt-get install -y libx11-dev libxt-dev libsdl2-dev
               sudo apt-get install -y libsdl2-image-dev;;
         klh10) sudo apt-get install -y libusb-1.0-0-dev;;
diff --git a/build/ka10/include.tcl b/build/ka10/include.tcl
index b0dbd3e7..cdeb3fb9 100644
--- a/build/ka10/include.tcl
+++ b/build/ka10/include.tcl
@@ -1,5 +1,5 @@
 proc start_dskdmp_its {} {
-    start_dskdmp build/sims/boot
+    start_dskdmp build/pdp10-ka/boot
 
     respond "DSKDMP" "its\r"
     patch_its_and_go
diff --git a/build/sims/boot b/build/pdp10-ka/boot
similarity index 55%
rename from build/sims/boot
rename to build/pdp10-ka/boot
index b3e5bad0..9e27cf22 100644
--- a/build/sims/boot
+++ b/build/pdp10-ka/boot
@@ -3,8 +3,8 @@ set cpu its
 set cpu 512k
 set pd off
 at ptr bin/ka10/boot/dskdmp.rim
-at mta0 out/sims/minsrc.tape
-at dpa0 out/sims/rp03.2
-at dpa1 out/sims/rp03.3
+at mta0 out/pdp10-ka/minsrc.tape
+at dpa0 out/pdp10-ka/rp03.2
+at dpa1 out/pdp10-ka/rp03.3
 set dpa noheaders
 b ptr
diff --git a/build/sims/boot2 b/build/pdp10-ka/boot2
similarity index 53%
rename from build/sims/boot2
rename to build/pdp10-ka/boot2
index 01771d6d..bfe254d8 100644
--- a/build/sims/boot2
+++ b/build/pdp10-ka/boot2
@@ -5,12 +5,12 @@ set cpu mpx
 set cpu ten11
 set pd off
 at ptr bin/ka10/boot/dskdmp.rim
-at mta0 out/sims/sources.tape
+at mta0 out/pdp10-ka/sources.tape
 set mta mpx=7
 set mta type=b
-at dpa0 out/sims/rp03.2
-at dpa1 out/sims/rp03.3
-at dpa2 out/sims/rp03.0
-at dpa3 out/sims/rp03.1
+at dpa0 out/pdp10-ka/rp03.2
+at dpa1 out/pdp10-ka/rp03.3
+at dpa2 out/pdp10-ka/rp03.0
+at dpa3 out/pdp10-ka/rp03.1
 set dpa noheaders
 b ptr
diff --git a/build/sims/build.tcl b/build/pdp10-ka/build.tcl
similarity index 87%
rename from build/sims/build.tcl
rename to build/pdp10-ka/build.tcl
index 1581bfc5..fb79d959 100644
--- a/build/sims/build.tcl
+++ b/build/pdp10-ka/build.tcl
@@ -3,7 +3,7 @@ set out "out/$env(EMULATOR)"
 set emulator_escape "\034"
 
 proc start_salv {} {
-    uplevel #0 {spawn ./tools/sims/BIN/ka10 build/sims/init}
+    uplevel #0 {spawn ./tools/sims/BIN/pdp10-ka build/pdp10-ka/init}
     setup_timeout
     respond "MAGDMP\r\n" "l\033ddt\r"
     respond "\n" "t\033salv\r"
@@ -15,9 +15,9 @@ proc start_dskdmp args {
     if {[llength $args] == 1} {
         set ini [lindex $args 0]
     } {
-        set ini "build/sims/boot2"
+        set ini "build/pdp10-ka/boot2"
     }
-    set foo "spawn ./tools/sims/BIN/ka10 $ini"
+    set foo "spawn ./tools/sims/BIN/pdp10-ka $ini"
     uplevel #0 $foo
     setup_timeout
 }
diff --git a/build/sims/config.202 b/build/pdp10-ka/config.202
similarity index 100%
rename from build/sims/config.202
rename to build/pdp10-ka/config.202
diff --git a/build/sims/gt40 b/build/pdp10-ka/gt40
similarity index 89%
rename from build/sims/gt40
rename to build/pdp10-ka/gt40
index 2381f869..21c4aa52 100644
--- a/build/sims/gt40
+++ b/build/pdp10-ka/gt40
@@ -13,5 +13,5 @@ set vt scale=1
 set vt address=17772000
 set rom enabled
 set rom0 address=17766000
-at rom0 out/sims/bootvt.img
+at rom0 out/pdp10-ka/bootvt.img
 boot rom0
diff --git a/build/pdp10-ka/init b/build/pdp10-ka/init
new file mode 100644
index 00000000..9bba4bae
--- /dev/null
+++ b/build/pdp10-ka/init
@@ -0,0 +1,12 @@
+set console wru=034
+set cpu its
+set cpu 512k
+at ptr bin/ka10/boot/magdmp.rim
+at mta0 out/pdp10-ka/magdmp.tap
+at mta5 out/pdp10-ka/ka-minsys.tape
+at dpa0 out/pdp10-ka/rp03.2
+at dpa1 out/pdp10-ka/rp03.3
+at dpa2 out/pdp10-ka/rp03.0
+at dpa3 out/pdp10-ka/rp03.1
+set dpa headers
+b ptr
diff --git a/build/sims/run b/build/pdp10-ka/run
similarity index 82%
rename from build/sims/run
rename to build/pdp10-ka/run
index b79cee29..37f664c2 100644
--- a/build/sims/run
+++ b/build/pdp10-ka/run
@@ -23,10 +23,10 @@ set imp gw=172.31.1.100
 set imp host=10.3.0.6
 at imp tap:tap0
 at ptr bin/ka10/boot/dskdmp.rim
-at dpa0 out/sims/rp03.2
-at dpa1 out/sims/rp03.3
-at dpa2 out/sims/rp03.0
-at dpa3 out/sims/rp03.1
+at dpa0 out/pdp10-ka/rp03.2
+at dpa1 out/pdp10-ka/rp03.3
+at dpa2 out/pdp10-ka/rp03.0
+at dpa3 out/pdp10-ka/rp03.1
 set mta mpx=7
 set mta type=b
 set dt mpx=6
diff --git a/build/sims/start b/build/pdp10-ka/start
similarity index 83%
rename from build/sims/start
rename to build/pdp10-ka/start
index 3fd13553..1760196e 100755
--- a/build/sims/start
+++ b/build/pdp10-ka/start
@@ -20,7 +20,7 @@ stop() {
 }
 
 gt40() {
-    (sleep 3; tools/simh/BIN/pdp11 build/sims/gt40 >gt40.log 2>&1) &
+    (sleep 3; tools/simh/BIN/pdp11 build/pdp10-ka/gt40 >gt40.log 2>&1) &
     started GT40 "$!"
 }
 
@@ -39,5 +39,5 @@ while test -n "$1"; do
     shift
 done
 
-tools/sims/BIN/ka10 build/sims/run
+tools/sims/BIN/pdp10-ka build/pdp10-ka/run
 exit 0
diff --git a/build/sims/tap.sh b/build/pdp10-ka/tap.sh
similarity index 100%
rename from build/sims/tap.sh
rename to build/pdp10-ka/tap.sh
diff --git a/build/sims/init b/build/sims/init
deleted file mode 100644
index eff602d2..00000000
--- a/build/sims/init
+++ /dev/null
@@ -1,12 +0,0 @@
-set console wru=034
-set cpu its
-set cpu 512k
-at ptr bin/ka10/boot/magdmp.rim
-at mta0 out/sims/magdmp.tap
-at mta5 out/sims/ka-minsys.tape
-at dpa0 out/sims/rp03.2
-at dpa1 out/sims/rp03.3
-at dpa2 out/sims/rp03.0
-at dpa3 out/sims/rp03.1
-set dpa headers
-b ptr
diff --git a/tools/sims b/tools/sims
index 09fe855f..23dab81f 160000
--- a/tools/sims
+++ b/tools/sims
@@ -1 +1 @@
-Subproject commit 09fe855fd3a2569b590373b0b4b539510660d966
+Subproject commit 23dab81f7a2ec15926db961f8d386ac9df89e976