diff --git a/cc65/README.md b/cc65/README.md
index b6b982f..c26495c 100644
--- a/cc65/README.md
+++ b/cc65/README.md
@@ -1 +1,7 @@
-Files in this directory are part of the `cc65` compiler, which is also [hosted](http://github.com/cc65/cc65) on GitHub.
+Files in this directory are part of the excellent **cc65** compiler, which is also [hosted](http://github.com/cc65/cc65) on GitHub.
+
+I am including the compiler configuration files I am using for reference.  I include the cc65 extended memory driver `a2e.auxmem.emd` because I include that file on the demonstration diskette image.
+
+As of May 27 2018, I have been building EightBall using cc65 version 2.15, although I plan to switch to a newer version in due course.
+
+You may use the latest version of cc65 from GitHub if you prefer.  In that case you should use the version of these files that is distributed with cc65.