diff --git a/src/mame/audio/avalnche.c b/src/mame/audio/avalnche.c
index 80af5f4307e..c4d6865b5ff 100644
--- a/src/mame/audio/avalnche.c
+++ b/src/mame/audio/avalnche.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /*************************************************************************
 
diff --git a/src/mame/audio/bsktball.c b/src/mame/audio/bsktball.c
index abc425307f8..23b01226f70 100644
--- a/src/mame/audio/bsktball.c
+++ b/src/mame/audio/bsktball.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /*************************************************************************
 
diff --git a/src/mame/audio/canyon.c b/src/mame/audio/canyon.c
index 4c471bc7a47..99d502605ad 100644
--- a/src/mame/audio/canyon.c
+++ b/src/mame/audio/canyon.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /*************************************************************************
 
diff --git a/src/mame/audio/nitedrvr.c b/src/mame/audio/nitedrvr.c
index 1fbb8262a9f..f0e2c1b7193 100644
--- a/src/mame/audio/nitedrvr.c
+++ b/src/mame/audio/nitedrvr.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /*************************************************************************
 
diff --git a/src/mame/audio/redalert.c b/src/mame/audio/redalert.c
index 6cfe48bf0d6..b00aa6deb0d 100644
--- a/src/mame/audio/redalert.c
+++ b/src/mame/audio/redalert.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /***************************************************************************
 
diff --git a/src/mame/audio/skydiver.c b/src/mame/audio/skydiver.c
index df434888183..de87f3441c2 100644
--- a/src/mame/audio/skydiver.c
+++ b/src/mame/audio/skydiver.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /*************************************************************************
 
diff --git a/src/mame/audio/sprint2.c b/src/mame/audio/sprint2.c
index f2164ead200..00189effe38 100644
--- a/src/mame/audio/sprint2.c
+++ b/src/mame/audio/sprint2.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /*************************************************************************
 
diff --git a/src/mame/audio/subs.c b/src/mame/audio/subs.c
index e96067fadd3..a26e83346fb 100644
--- a/src/mame/audio/subs.c
+++ b/src/mame/audio/subs.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /*************************************************************************
 
diff --git a/src/mame/drivers/avalnche.c b/src/mame/drivers/avalnche.c
index 3c1f987fc46..8b3f2f97019 100644
--- a/src/mame/drivers/avalnche.c
+++ b/src/mame/drivers/avalnche.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /***************************************************************************
 
diff --git a/src/mame/drivers/bking.c b/src/mame/drivers/bking.c
index afd9040a65a..6afdf1d9609 100644
--- a/src/mame/drivers/bking.c
+++ b/src/mame/drivers/bking.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Ed Mueller, Mike Balfour, Zsolt Vasvari
 /***************************************************************************
 
diff --git a/src/mame/drivers/bsktball.c b/src/mame/drivers/bsktball.c
index f6fddae7c71..49e4c869735 100644
--- a/src/mame/drivers/bsktball.c
+++ b/src/mame/drivers/bsktball.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /***************************************************************************
 
diff --git a/src/mame/drivers/canyon.c b/src/mame/drivers/canyon.c
index f3e28140c59..cfb8f89198f 100644
--- a/src/mame/drivers/canyon.c
+++ b/src/mame/drivers/canyon.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /***************************************************************************
 
diff --git a/src/mame/drivers/cloud9.c b/src/mame/drivers/cloud9.c
index e4a684913d8..1a10d964d04 100644
--- a/src/mame/drivers/cloud9.c
+++ b/src/mame/drivers/cloud9.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /***************************************************************************
 
diff --git a/src/mame/drivers/nitedrvr.c b/src/mame/drivers/nitedrvr.c
index 5a626b26c81..eeca4a65368 100644
--- a/src/mame/drivers/nitedrvr.c
+++ b/src/mame/drivers/nitedrvr.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /***************************************************************************
 
diff --git a/src/mame/drivers/redalert.c b/src/mame/drivers/redalert.c
index 16d85690e89..33a3ff6667f 100644
--- a/src/mame/drivers/redalert.c
+++ b/src/mame/drivers/redalert.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /***************************************************************************
 
diff --git a/src/mame/drivers/runaway.c b/src/mame/drivers/runaway.c
index 4f9170c0b97..2f572df016a 100644
--- a/src/mame/drivers/runaway.c
+++ b/src/mame/drivers/runaway.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /***************************************************************************
 
diff --git a/src/mame/drivers/sbrkout.c b/src/mame/drivers/sbrkout.c
index 49652a80cda..630d7908fb5 100644
--- a/src/mame/drivers/sbrkout.c
+++ b/src/mame/drivers/sbrkout.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /***************************************************************************
 
diff --git a/src/mame/drivers/skydiver.c b/src/mame/drivers/skydiver.c
index d7cb96816fa..ed00b43ff97 100644
--- a/src/mame/drivers/skydiver.c
+++ b/src/mame/drivers/skydiver.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /***************************************************************************
 
diff --git a/src/mame/drivers/sprint2.c b/src/mame/drivers/sprint2.c
index da674347c1e..833505e2026 100644
--- a/src/mame/drivers/sprint2.c
+++ b/src/mame/drivers/sprint2.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /***************************************************************************
 
diff --git a/src/mame/drivers/subs.c b/src/mame/drivers/subs.c
index 968a4739e48..084e535be58 100644
--- a/src/mame/drivers/subs.c
+++ b/src/mame/drivers/subs.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /***************************************************************************
 
diff --git a/src/mame/drivers/vigilant.c b/src/mame/drivers/vigilant.c
index ffc9cf92df7..9b8ac7744ac 100644
--- a/src/mame/drivers/vigilant.c
+++ b/src/mame/drivers/vigilant.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /***************************************************************************
 
diff --git a/src/mame/includes/avalnche.h b/src/mame/includes/avalnche.h
index a1e1d6ea2c0..9f51e43a518 100644
--- a/src/mame/includes/avalnche.h
+++ b/src/mame/includes/avalnche.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /*************************************************************************
 
diff --git a/src/mame/includes/bking.h b/src/mame/includes/bking.h
index 539ceb9a579..630a37c0da6 100644
--- a/src/mame/includes/bking.h
+++ b/src/mame/includes/bking.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Ed Mueller, Mike Balfour, Zsolt Vasvari
 #include "machine/buggychl.h"
 
diff --git a/src/mame/includes/bsktball.h b/src/mame/includes/bsktball.h
index c3a2e3f06b9..ad1cc4dbe41 100644
--- a/src/mame/includes/bsktball.h
+++ b/src/mame/includes/bsktball.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /*************************************************************************
 
diff --git a/src/mame/includes/canyon.h b/src/mame/includes/canyon.h
index 55b9a010fe4..7f31db4cc7e 100644
--- a/src/mame/includes/canyon.h
+++ b/src/mame/includes/canyon.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /*************************************************************************
 
diff --git a/src/mame/includes/cloud9.h b/src/mame/includes/cloud9.h
index 7a244aae490..4020036ce7d 100644
--- a/src/mame/includes/cloud9.h
+++ b/src/mame/includes/cloud9.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /*************************************************************************
 
diff --git a/src/mame/includes/nitedrvr.h b/src/mame/includes/nitedrvr.h
index ea18bf7900d..e90d0c897ac 100644
--- a/src/mame/includes/nitedrvr.h
+++ b/src/mame/includes/nitedrvr.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /*************************************************************************
 
diff --git a/src/mame/includes/redalert.h b/src/mame/includes/redalert.h
index 3d33029ac27..97e6e12d324 100644
--- a/src/mame/includes/redalert.h
+++ b/src/mame/includes/redalert.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /***************************************************************************
 
diff --git a/src/mame/includes/runaway.h b/src/mame/includes/runaway.h
index 0f61d55c6c4..a83345c0d38 100644
--- a/src/mame/includes/runaway.h
+++ b/src/mame/includes/runaway.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 class runaway_state : public driver_device
 {
diff --git a/src/mame/includes/skydiver.h b/src/mame/includes/skydiver.h
index d9e9385edf6..b2d3f66674c 100644
--- a/src/mame/includes/skydiver.h
+++ b/src/mame/includes/skydiver.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /*************************************************************************
 
diff --git a/src/mame/includes/sprint2.h b/src/mame/includes/sprint2.h
index e56a4bdc53c..c276d50d878 100644
--- a/src/mame/includes/sprint2.h
+++ b/src/mame/includes/sprint2.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /*************************************************************************
 
diff --git a/src/mame/includes/subs.h b/src/mame/includes/subs.h
index a559f34734e..8bfb47140dc 100644
--- a/src/mame/includes/subs.h
+++ b/src/mame/includes/subs.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /*************************************************************************
 
diff --git a/src/mame/includes/vigilant.h b/src/mame/includes/vigilant.h
index 8c30329e19e..06467bede2b 100644
--- a/src/mame/includes/vigilant.h
+++ b/src/mame/includes/vigilant.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 #include "audio/m72.h"
 
diff --git a/src/mame/machine/bsktball.c b/src/mame/machine/bsktball.c
index 4cef5d0c093..c290c9755ff 100644
--- a/src/mame/machine/bsktball.c
+++ b/src/mame/machine/bsktball.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /***************************************************************************
 
diff --git a/src/mame/machine/nitedrvr.c b/src/mame/machine/nitedrvr.c
index dd5a1e02962..3599e062d88 100644
--- a/src/mame/machine/nitedrvr.c
+++ b/src/mame/machine/nitedrvr.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /***************************************************************************
 
diff --git a/src/mame/machine/subs.c b/src/mame/machine/subs.c
index 9fd74abc8ec..b69d581ba4a 100644
--- a/src/mame/machine/subs.c
+++ b/src/mame/machine/subs.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /***************************************************************************
 
diff --git a/src/mame/video/bking.c b/src/mame/video/bking.c
index 87b0795ea05..ad74f046626 100644
--- a/src/mame/video/bking.c
+++ b/src/mame/video/bking.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Ed Mueller, Mike Balfour, Zsolt Vasvari
 /***************************************************************************
 
diff --git a/src/mame/video/bsktball.c b/src/mame/video/bsktball.c
index d5f46194416..99aef305688 100644
--- a/src/mame/video/bsktball.c
+++ b/src/mame/video/bsktball.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /***************************************************************************
 
diff --git a/src/mame/video/canyon.c b/src/mame/video/canyon.c
index c8b82671d34..0c8344387b8 100644
--- a/src/mame/video/canyon.c
+++ b/src/mame/video/canyon.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /***************************************************************************
 
diff --git a/src/mame/video/cloud9.c b/src/mame/video/cloud9.c
index 1710802560c..f6a74bfcf11 100644
--- a/src/mame/video/cloud9.c
+++ b/src/mame/video/cloud9.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /***************************************************************************
 
diff --git a/src/mame/video/nitedrvr.c b/src/mame/video/nitedrvr.c
index b9ec1d89bfb..5d5851abecf 100644
--- a/src/mame/video/nitedrvr.c
+++ b/src/mame/video/nitedrvr.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /***************************************************************************
 
diff --git a/src/mame/video/redalert.c b/src/mame/video/redalert.c
index 76c36834cd1..3478f298bea 100644
--- a/src/mame/video/redalert.c
+++ b/src/mame/video/redalert.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /***************************************************************************
 
diff --git a/src/mame/video/runaway.c b/src/mame/video/runaway.c
index 756c355e034..ba66666bfc0 100644
--- a/src/mame/video/runaway.c
+++ b/src/mame/video/runaway.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /***************************************************************************
 
diff --git a/src/mame/video/skydiver.c b/src/mame/video/skydiver.c
index c4f3eded102..435753450c1 100644
--- a/src/mame/video/skydiver.c
+++ b/src/mame/video/skydiver.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /***************************************************************************
 
diff --git a/src/mame/video/sprint2.c b/src/mame/video/sprint2.c
index 0c4afaafd66..d314960a231 100644
--- a/src/mame/video/sprint2.c
+++ b/src/mame/video/sprint2.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /***************************************************************************
 
diff --git a/src/mame/video/subs.c b/src/mame/video/subs.c
index 40c88aa4737..db800123a99 100644
--- a/src/mame/video/subs.c
+++ b/src/mame/video/subs.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /***************************************************************************
 
diff --git a/src/mame/video/vigilant.c b/src/mame/video/vigilant.c
index 57923cf9864..6728f37d8c2 100644
--- a/src/mame/video/vigilant.c
+++ b/src/mame/video/vigilant.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour
 /***************************************************************************