diff --git a/README.md b/README.md
new file mode 100644
index 0000000..46e6bb9
--- /dev/null
+++ b/README.md
@@ -0,0 +1,8 @@
+# Apple Disk II address field scanner
+
+This application is my lame attempt to understand the old Apple Disk II interface.  This included writing the read, decode, and physical routines to move the disk arm.
+
+## Software required to build:
+* [Merlin32](http://www.brutaldeluxe.fr/products/crossdevtools/merlin/index.html) by Brutal Deluxe
+* The command-line variant of [AppleCommander](https://sites.google.com/site/drjohnbmatthews/applecommander)
+* Either a real Apple II or an emulator