diff --git a/TODO.md b/TODO.md
index c9cd6aba..fdc87c9b 100644
--- a/TODO.md
+++ b/TODO.md
@@ -1,4 +1,6 @@
 - code generation for car tiles
+- keep MicroCode radio numbers to small range (0-99)
+- range for car control (1000-)
 - extensions [jacdac, car]
   - extension interface
       - also need some interface for tile description