diff --git a/konami/io.md b/konami/io.md
index 8101875..6c3d798 100644
--- a/konami/io.md
+++ b/konami/io.md
@@ -86,10 +86,14 @@ e-AMUSEMENT pass (IC card) reader. Is really two types of devices: the old slot
 
 ## J32D
 
+Guitarfreaks/Drummania XG (J32) device.
+
 ## KLPA
 
 ## MDXF
 
+DDR A (MDX) device.
+
 ## NDDB
 
 ## PANB