diff --git a/build/pdp10-ka/boot2 b/build/pdp10-ka/boot2
index 413a6386..ee548775 100644
--- a/build/pdp10-ka/boot2
+++ b/build/pdp10-ka/boot2
@@ -13,6 +13,8 @@ set cr dis
 set dc dis
 set dtc dis
 set dk dis
+set pd ena
+set pd on
 at ptr bin/ka10/boot/dskdmp.rim
 at mta0 out/pdp10-ka/sources.tape
 set mta mpx=7
diff --git a/build/pdp10-kl/boot2 b/build/pdp10-kl/boot2
index 11f0c73e..a595f531 100644
--- a/build/pdp10-kl/boot2
+++ b/build/pdp10-kl/boot2
@@ -12,7 +12,8 @@ set cr dis
 set dc dis
 set dtc dis
 set dk dis
-set pd off
+set pd ena
+set pd on
 at mta0 out/pdp10-kl/sources.tape
 at rpa0 out/pdp10-kl/rp04.0
 at rpa1 out/pdp10-kl/rp04.1
diff --git a/build/pdp10-kl/run b/build/pdp10-kl/run
index 3ca95547..56e57d4a 100644
--- a/build/pdp10-kl/run
+++ b/build/pdp10-kl/run
@@ -1,5 +1,6 @@
 set console wru=034
 set cpu its
+set cpu idle
 set cpu 512k
 set dpa dis
 set dpb dis
@@ -12,6 +13,8 @@ set cr dis
 set dc dis
 set dtc dis
 set dk dis
+set pd ena
+set pd on
 at ptr bin/kl10/boot/dskdmp.rim
 set rpa rp04
 at rpa0 out/pdp10-kl/rp04.0