diff --git a/src/mame/drivers/segaybd.c b/src/mame/drivers/segaybd.c
index ede9e457fba..10d13205f42 100644
--- a/src/mame/drivers/segaybd.c
+++ b/src/mame/drivers/segaybd.c
@@ -1505,6 +1505,8 @@ ROM_END
 //*************************************************************************************************************************
 //  G-Loc, Sega Y-board
 //  CPU: 68000 (317-????)
+//  VIDEO BD    837-7301-01
+//  GAME BD     834-7300-04 G-LOC
 //
 ROM_START( gloc )
 	ROM_REGION( 0x080000, "maincpu", 0 ) // M