diff --git a/README.md b/README.md
index 7bb2890..dc1ee96 100644
--- a/README.md
+++ b/README.md
@@ -9,6 +9,6 @@ Library and demos for the Apple-1 TMS9918 video card by P-LAB.
 - `test_vic20.prg` runs on the "hybrid" VIC-20 emulator
 - `node hexdump` puts `test_apple1.prg` into WOZMON format for the Apple-1
 
-Note: Apple-1 start address is $4000, with TMS address range $C000-$C001
+Note: Apple-1 start address is $4000, with TMS address range $CC00-$CC01