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-rw-r--r--mu_summary4
1 files changed, 4 insertions, 0 deletions
diff --git a/mu_summary b/mu_summary
index 2d48d2de..8eafc4e3 100644
--- a/mu_summary
+++ b/mu_summary
@@ -114,6 +114,10 @@ register):
 Notice that there are no primitive instructions operating on two variables in
 memory. That's a restriction of the underlying x86 processor.
 
+Any instruction above that takes a variable in memory can be replaced with a
+dereference (`*`) of an address variable in a register. But you can't dereference
+variables in memory.
+
 ## Primitive jump instructions
 
 There are two kinds of jumps, both with many variations: `break` and `loop`.