diff --git a/README.md b/README.md
index d981702..81dcc51 100644
--- a/README.md
+++ b/README.md
@@ -51,10 +51,12 @@ If the game uses battery-backed RAM (if it can save data when the console is tur
 
 ## To do
 
-- DMC audio channel
-
 - support other controllers?
 
+- more mappers?
+
+- better save file organization?
+
 ## Known problem games
 
 - None currently, please report any issues
diff --git a/src/main.rs b/src/main.rs
index acae884..4170186 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -251,7 +251,6 @@ Up/Down/Left/Right: arrow keys
 /*
 
 TODO:
-- DMC audio channel
 - untangle CPU and APU/PPU?
 - better save file organization?