diff --git a/sigma.ini b/sigma.ini
index 3b306ad..2a36d6f 100644
--- a/sigma.ini
+++ b/sigma.ini
@@ -1,17 +1,11 @@
-# boot CPV
+# Configure simh to support CP-V installed from cpcp.tap
 
-set cpu history=6000
-rm simulator.dbg
-set debug simulator.dbg
+# This is CP-V C00 release as defined at Andrews University.
+# It includes modifications and features developed by AU
 
-#SET SCP-PROCESS DEBUG=EXPSTACK
-#SET SCP-PROCESS DEBUG=EXPEVAL
-#SET SCP-PROCESS DEBUG=QUEUE
-#SET SCP-PROCESS DEBUG=ACTIVATE
-#SET SCP-PROCESS DEBUG=NEGATIVE
-#SET SCP-PROCESS DEBUG=EVENT
-
-#SET CPU DEBUG=TRACE
+#set cpu history=6000
+#rm simulator.dbg
+#set debug simulator.dbg
 
 set cpu sigma7B
 
@@ -26,8 +20,10 @@ set dpb chan=b,dva=f
 #set rad to avoid conflict with dpb
 set rad chan=d,dva=8
  
+#attach coc lines for special terminals
 att mux line=0,2020,line=1,2021,line=2,2022,line=3,2023,line=10,2010
 att mux line=04,2024,line=5,2025
+#attach coc lines for the remaining vt-100 type terminals
 att mux 4000
 att lp    cpvprinter
 att mt0   ../cpcp.tap