From f4361a998d6a742243e7040a26d304a79c5a9a58 Mon Sep 17 00:00:00 2001
From: Michael Specht <micha.specht@gmail.com>
Date: Fri, 16 Feb 2018 21:56:31 +0100
Subject: [PATCH] documentation

---
 README.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/README.md b/README.md
index 98869ad..3045c95 100644
--- a/README.md
+++ b/README.md
@@ -175,6 +175,8 @@ COUNT   DEX         ; @Xu(post) @cycles
         RTS
 ```
 
+Please note that this will only yield data for labels which actually get called via `JSR` at some point in the program.
+
 This programm calls the `COUNT` subroutine three times with different X arguments, and we get both X and the number of cycles spent in `COUNT`:
 
 ![X at PC 0x6010](doc/example04_1.gif?raw=true)