diff --git a/000.trackdisk/README.md b/000.trackdisk/README.md
index 1cfb1b5..65ebfce 100644
--- a/000.trackdisk/README.md
+++ b/000.trackdisk/README.md
@@ -5,4 +5,6 @@ Create a bootable adf file that loads a simple program using trackdisk.device.
 
 The bootblock code is in ../shared/bootblock.s
 
-The program has two simple copper lists and switches between them each vertical blank interrupt
\ No newline at end of file
+[a relative link](shared/bootblock.s)
+
+The program has two simple copper lists and switches between them each vertical blank interrupt