mention how to configure sound&video in SDL

SVN-Revision: 1346

diff --git a/README b/README
index a415802..8b057a9 100644 (file)
--- a/README
+++ b/README
@@ -125,6 +125,13 @@ SCORING
     You can also score by shooting at the enemies. Don't forget to get
     the iceflower in order to get the ability to fire.
 
+VIDEO/AUDIO CONFIGURATION
+-------------------------
+
+We're using SDL for the low-level audio and video output. Configuring SDL is
+explained here:
+
+  http://sdldoc.csn.ul.ie/sdlenvvars.php
 
 OPTIONS FILE
 ------------