diff --git a/tools/pdp6 b/tools/pdp6
index 0ff62142..22868594 160000
--- a/tools/pdp6
+++ b/tools/pdp6
@@ -1 +1 @@
-Subproject commit 0ff621423425bfc33c826ad360fda287cba8086e
+Subproject commit 22868594bd140042ebab0fea0fb78fb0102cdf34
diff --git a/tools/sims b/tools/sims
index a5c53fd2..c0050dc0 160000
--- a/tools/sims
+++ b/tools/sims
@@ -1 +1 @@
-Subproject commit a5c53fd2f80c0f2b78367090fb6c38789fe939d2
+Subproject commit c0050dc0588ec7d2a3f5ab41bc0079f069290143
diff --git a/tools/vt05 b/tools/vt05
index f1e25802..3616646d 160000
--- a/tools/vt05
+++ b/tools/vt05
@@ -1 +1 @@
-Subproject commit f1e25802e889d2d25e15078db96f9093b10cab29
+Subproject commit 3616646d8a343acc270577bd0711d0178c7b94f0