diff --git a/src/mame/drivers/segaybd.c b/src/mame/drivers/segaybd.c
index 58c30bc331b..3672f0cf64c 100644
--- a/src/mame/drivers/segaybd.c
+++ b/src/mame/drivers/segaybd.c
@@ -765,9 +765,18 @@ static ADDRESS_MAP_START( link_map, AS_PROGRAM, 8, segaybd_state )
 	AM_RANGE(0x4000, 0x47ff) AM_RAM AM_SHARE("linkram")
 ADDRESS_MAP_END
 
+READ8_MEMBER(segaybd_state::link_portc0_r)
+{
+	return 0xf8;
+}
+
 static ADDRESS_MAP_START( link_portmap, AS_IO, 8, segaybd_state )
 	ADDRESS_MAP_UNMAP_HIGH
 	ADDRESS_MAP_GLOBAL_MASK(0xff)
+
+//	AM_RANGE(0x40, 0x40) AM_READ_PORT("LinkDSW") 
+	AM_RANGE(0xc0, 0xc0) AM_READ(link_portc0_r)
+	
 ADDRESS_MAP_END
 
 //**************************************************************************
diff --git a/src/mame/includes/segaybd.h b/src/mame/includes/segaybd.h
index bc0a1d812cd..ffc9500a594 100644
--- a/src/mame/includes/segaybd.h
+++ b/src/mame/includes/segaybd.h
@@ -124,5 +124,7 @@ public:
 	DECLARE_READ8_MEMBER(linkram_r);
 	DECLARE_WRITE8_MEMBER(linkram_w);
 
+	DECLARE_READ8_MEMBER(link_portc0_r);
+
 	optional_shared_ptr<UINT8> m_linkram;
 };