diff --git a/include/platform/a8.ini b/include/platform/a8.ini
index 79d6c8c4..09ea3f76 100644
--- a/include/platform/a8.ini
+++ b/include/platform/a8.ini
@@ -15,6 +15,7 @@
 ; $a000-$bfff Cartrige 8k/High 16k/BASIC
 ; $c000-$cfff OS part 1
 ; $cc00-$cfff OS character set, international
+; $d000-$d7ff Hardware registers and stuff
 ; $e000-$ffff OS part 2
 ; $e000-$e3ff OS character set, standard