diff --git a/src/mess/drivers/fmtowns.c b/src/mess/drivers/fmtowns.c
index 15b6e7e7249..2b08cfd0f04 100644
--- a/src/mess/drivers/fmtowns.c
+++ b/src/mess/drivers/fmtowns.c
@@ -15,6 +15,8 @@
             1024 sprites (16x16), rendered direct to VRAM
             16 colour text mode, rendered direct to VRAM
 
+    Later models add an unknown single channel 16-bit PCM/ADPCM (FreshTV, SJ, MX), and CL-GD543x Windows accelerator chipsets (SJ)
+
 
     Fujitsu FM-Towns Marty