diff --git a/notes/todo.md b/notes/todo.md
index d26e129..7db5d28 100644
--- a/notes/todo.md
+++ b/notes/todo.md
@@ -22,6 +22,13 @@
     - [ ] Display (hex) numbers
     - [ ] Greater than
 
+## Run-scripts
+
+- [ ] Change interface to run in non-debug mode by default, and use a flag to select debug mode:
+    - `./run-cpu.js foo.asm`
+    - `./run-cpu.js --debug foo.asm`
+    - `./run-cpu.js -d foo.asm`
+
 ## Simulator
 
 - [ ] rewrite to call things 'opcodes' and 'operands'