diff --git a/helloworld.asm b/helloworld.asm
index 5f4b783..e927fea 100644
--- a/helloworld.asm
+++ b/helloworld.asm
@@ -33,6 +33,7 @@ bail
      inc $d020
      jmp *-3
 
+; macro to convert ASCII text here to native screen codes
 .enc "screen"
 my_string .null "HELLO WORLD!"
 .enc "none"