diff --git a/hash/to_flop.xml b/hash/to_flop.xml
index 0d4c845911c..5dd2a87e9e0 100644
--- a/hash/to_flop.xml
+++ b/hash/to_flop.xml
@@ -4,6 +4,10 @@
 license:CC0-1.0
 
 Thanks to DCMOTO (http://dcmoto.free.fr) for info!
+
+FIXME: Many of these images should be 5.25" rather than 3.5". (The old custom Thomson floppy emulation didn't care about form factor.)
+TODO: SAP format is not currently supported.
+TBD: Which images are compatible with which systems?
 -->
 <softwarelist name="to_flop" description="Thomson TO-series floppy disks">