diff --git a/README.md b/README.md
index b6f6f0c..e8b43dd 100644
--- a/README.md
+++ b/README.md
@@ -21,6 +21,7 @@ Iterated through 0.3, 0.4 and currently calling this thing 0.5.  There some free
 This repository contains the Commodore 64 BASIC and KERNAL source in a format that is easy to edit and can be built using modern tools on modern systems. It is derived from the [original sources](https://www.github.com/mist64/cbmsrc), with all original symbols and comments intact.
 
 ## Building
+Linux:
 
 * Requires
 	* [cc65](https://github.com/cc65/cc65).
@@ -30,6 +31,9 @@ This repository contains the Commodore 64 BASIC and KERNAL source in a format th
 	* `basic.bin` (`$A000`-`$BFFF`): identical with basic.901226-01.bin
 	* `kernal.bin` (`$E000`-`$FFFF`): identical with kernal.901227-03.bin
 
+Windows:
+
+I've added batch files for building and cleaning the build environment.  You'll need to install cc65 onto your system and have it available in your PATH.  See https://cc65.github.io/getting-started.html for more info.
 ## Modifying
 
 The major parts of KERNAL reside in their own segments that will always be linked to their original addresses, so if you want to remove tape or RS232 support, for example, the other sections will still remain where they should be in the image.