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-rw-r--r--baremetal/102keyboard.subx3
1 files changed, 3 insertions, 0 deletions
diff --git a/baremetal/102keyboard.subx b/baremetal/102keyboard.subx
index b047a7c2..f2c22339 100644
--- a/baremetal/102keyboard.subx
+++ b/baremetal/102keyboard.subx
@@ -1,5 +1,8 @@
 # check keyboard for a key
 # return 0 on no keypress or unrecognized key
+#
+# We need to do this in machine code because Mu doesn't have global variables
+# yet (for the keyboard buffer).
 
 == code