diff --git a/build/Notes.md b/build/Notes.md
index 4656999..0a7bba8 100644
--- a/build/Notes.md
+++ b/build/Notes.md
@@ -148,3 +148,10 @@ perfectly yet.
 
 boot.rim is now "Hardware Read In", and only 120 bytes (12 inches),
 and in the format an actual PDP-7 wants at cold start!
+
+adjusted shell to take 10 arguments
+(needed to build "cold start" system a.out)
+
+load sys sources into ken directory
+along with "sys.rc" file (run with "sh <sys.rc") to build system files
+(errors building maksys and trysys)
diff --git a/build/fs/sys.rc b/build/fs/sys.rc
new file mode 100644
index 0000000..fbf6196
--- /dev/null
+++ b/build/fs/sys.rc
@@ -0,0 +1,5 @@
+as sop.s maksys.s
+mv a.out maksys
+as sop.s trysys.s
+mv a.out trysys
+as sop.s s1.s s2.s s3.s s4.s s5.s s6.s s7.s s8.s
diff --git a/build/proto b/build/proto
index 6ea7cfd..e488876 100644
--- a/build/proto
+++ b/build/proto
@@ -46,7 +46,18 @@ dd 	         drwr- -1 4
 	$
     ken      drwr- 10
       system l----  3
-      hello  frwr- 10 fs/hello
+      sop.s      frwr- 10 ../src/sys/sop.s
+      s1.s       frwr- 10 ../src/sys/s1.s
+      s2.s       frwr- 10 ../src/sys/s2.s
+      s3.s       frwr- 10 ../src/sys/s3.s
+      s4.s       frwr- 10 ../src/sys/s4.s
+      s5.s       frwr- 10 ../src/sys/s5.s
+      s6.s       frwr- 10 ../src/sys/s6.s
+      s7.s       frwr- 10 ../src/sys/s7.s
+      s8.s       frwr- 10 ../src/sys/s8.s
+      maksys.s   frwr- 10 ../src/sys/maksys.s
+      trysys.s   frwr- 10 ../src/sys/trysys.s
+      sys.rc     frwr- 10 fs/sys.rc
       $
     dmr        drwr- 12
       system   l----  3