commentary/rts.md

@@ -43,6 +43,7 @@ Next, we try to make sense of how it all fits together.
 - [Coding conventions in the RTS](commentary/rts/conventions)
 - [How Signals are handled](commentary/rts/signals)
 - [The IO Manager thread](commentary/rts/io-manager)
+- [The HEAP_ALLOCED macro](commentary/heap-alloced)
 
 
 Also check the list of cross-cutting concerns in [Commentary](commentary).