diff --git a/README.md b/README.md
index 70a34e9..9cc4ef2 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,4 @@
 # rollingdemo
-A mixed display mode demo for the Apple II, written in 6502 Assembly
+A mixed display mode demo for the Apple IIe, written in 6502 Assembly
+
+Uses $C019 on the IIe to detect the VBL interval and some cycle counting to switch display modes during the screen draw for a mix of low-res and text modes.