diff --git a/src/emu/sound/ymz280b.c b/src/emu/sound/ymz280b.c
index 0542d17b2c4..0aff27d09cf 100644
--- a/src/emu/sound/ymz280b.c
+++ b/src/emu/sound/ymz280b.c
@@ -19,9 +19,11 @@
   Voice signal is output in stereo 16-bit 2's complement MSB-first format
 
   TODO:
-  - Is memory handling 100% correct? At the moment, Konami firebeat.c and Scorpion bfm_sc4/5.c
-    are the only hardware currently emulated that use external handlers.
-    Konami firebeat.c also happens to be the only one using 16-bit PCM.
+  - Is memory handling 100% correct? At the moment, Konami firebeat.c is the only
+    hardware currently emulated that uses external handlers.
+    It also happens to be the only one using 16-bit PCM.
+    
+    Some other drivers (eg. bishi.c, bfm_sc4/5.c) also use ROM readback.
 
 */