diff --git a/tools/assem b/tools/assem
index e72d2c9..3c1c509 100755
--- a/tools/assem
+++ b/tools/assem
@@ -6,6 +6,7 @@
 # settings
 APOUT=/tmp/apout2.3alpha2/apout
 APOUT_ROOT=/tmp/s2
+COLD=1
 
 export APOUT_ROOT
 
@@ -18,10 +19,19 @@ tools/rebuild
 test -d build || mkdir build
 for f in rebuilt/u?.s ; do
     b=`basename $f`
-    sed -e 's/mount/xmount/g' \
-	-e 's/.*init by copy.*/4;4;unkni;0;fpsym;0/' < $f > build/$b
+    if [ $COLD = 1 ] ; then
+        sed -e 's/.*init by copy.*/4;4;unkni;0;fpsym;0/' \
+            -e 's/mount/xmount/' \
+            -e 's/gtty/xgtty/' \
+            -e 's/cold = 0/cold = 1/' < $f > build/$b
+    else 
+        sed -e 's/.*init by copy.*/4;4;unkni;0;fpsym;0/' \
+            -e 's/mount/xmount/' < $f > build/$b
+    fi
 done
 
 cd build
-$APOUT $APOUT_ROOT/bin/as - u?.s
+$APOUT $APOUT_ROOT/bin/as ../sys1.s u?.s
+$APOUT $APOUT_ROOT/bin/nm a.out |sort > a.out.syms
+../tools/ml