diff --git a/src/mame/audio/hyprolyb.c b/src/mame/audio/hyprolyb.c
index 18bc9ea5bdc..c816e4bb603 100644
--- a/src/mame/audio/hyprolyb.c
+++ b/src/mame/audio/hyprolyb.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Chris Hardy
 #include "emu.h"
 #include "cpu/m6800/m6800.h"
diff --git a/src/mame/audio/hyprolyb.h b/src/mame/audio/hyprolyb.h
index 88ecbd9ccde..1e835492278 100644
--- a/src/mame/audio/hyprolyb.h
+++ b/src/mame/audio/hyprolyb.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Chris Hardy
 #include "sound/msm5205.h"
 
diff --git a/src/mame/audio/spacefb.c b/src/mame/audio/spacefb.c
index 81eb47edffa..12cff3cbf78 100644
--- a/src/mame/audio/spacefb.c
+++ b/src/mame/audio/spacefb.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Chris Hardy
 /***************************************************************************
 
diff --git a/src/mame/audio/trackfld.c b/src/mame/audio/trackfld.c
index 0ad6853f5bf..b73a5d708fe 100644
--- a/src/mame/audio/trackfld.c
+++ b/src/mame/audio/trackfld.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Chris Hardy
 #include "emu.h"
 #include "sound/sn76496.h"
diff --git a/src/mame/audio/trackfld.h b/src/mame/audio/trackfld.h
index 4b7260e48b7..9aabced1c22 100644
--- a/src/mame/audio/trackfld.h
+++ b/src/mame/audio/trackfld.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Chris Hardy
 #include "sound/vlm5030.h"
 #include "cpu/m6800/m6800.h"
diff --git a/src/mame/drivers/hyperspt.c b/src/mame/drivers/hyperspt.c
index 2150dc9c0ef..826e5e278c0 100644
--- a/src/mame/drivers/hyperspt.c
+++ b/src/mame/drivers/hyperspt.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Chris Hardy
 /***************************************************************************
 
diff --git a/src/mame/drivers/junofrst.c b/src/mame/drivers/junofrst.c
index ce1a3dff1ff..a5f0180aefd 100644
--- a/src/mame/drivers/junofrst.c
+++ b/src/mame/drivers/junofrst.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Chris Hardy
 /***************************************************************************
 
diff --git a/src/mame/drivers/megazone.c b/src/mame/drivers/megazone.c
index 20b592a7482..5a82b24de3a 100644
--- a/src/mame/drivers/megazone.c
+++ b/src/mame/drivers/megazone.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Chris Hardy
 /**************************************************************************
 
diff --git a/src/mame/drivers/rocnrope.c b/src/mame/drivers/rocnrope.c
index 28b436fa72c..16c5fd25116 100644
--- a/src/mame/drivers/rocnrope.c
+++ b/src/mame/drivers/rocnrope.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Chris Hardy
 /***************************************************************************
 
diff --git a/src/mame/drivers/spacefb.c b/src/mame/drivers/spacefb.c
index d2001956aa3..e71440f1164 100644
--- a/src/mame/drivers/spacefb.c
+++ b/src/mame/drivers/spacefb.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Chris Hardy
 /***************************************************************************
 
diff --git a/src/mame/drivers/trackfld.c b/src/mame/drivers/trackfld.c
index 43913905cf5..7ff93fb34ca 100644
--- a/src/mame/drivers/trackfld.c
+++ b/src/mame/drivers/trackfld.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Chris Hardy
 /*
 
diff --git a/src/mame/drivers/warpwarp.c b/src/mame/drivers/warpwarp.c
index 7669ea5ca56..4e868343715 100644
--- a/src/mame/drivers/warpwarp.c
+++ b/src/mame/drivers/warpwarp.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Chris Hardy
 /***************************************************************************
 
diff --git a/src/mame/includes/hyperspt.h b/src/mame/includes/hyperspt.h
index 7e6464f6bab..2beec42840d 100644
--- a/src/mame/includes/hyperspt.h
+++ b/src/mame/includes/hyperspt.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Chris Hardy
 
 #include "sound/sn76496.h"
diff --git a/src/mame/includes/megazone.h b/src/mame/includes/megazone.h
index 2fc4d1f7649..baa670b8762 100644
--- a/src/mame/includes/megazone.h
+++ b/src/mame/includes/megazone.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Chris Hardy
 /*************************************************************************
 
diff --git a/src/mame/includes/rocnrope.h b/src/mame/includes/rocnrope.h
index 76bf00401e0..9345b69eeef 100644
--- a/src/mame/includes/rocnrope.h
+++ b/src/mame/includes/rocnrope.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Chris Hardy
 class rocnrope_state : public driver_device
 {
diff --git a/src/mame/includes/spacefb.h b/src/mame/includes/spacefb.h
index ccabe72623e..8476eb7a917 100644
--- a/src/mame/includes/spacefb.h
+++ b/src/mame/includes/spacefb.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Chris Hardy
 /***************************************************************************
 
diff --git a/src/mame/includes/trackfld.h b/src/mame/includes/trackfld.h
index ad631d1e457..93df7e95d2f 100644
--- a/src/mame/includes/trackfld.h
+++ b/src/mame/includes/trackfld.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Chris Hardy
 /***************************************************************************
 
diff --git a/src/mame/includes/warpwarp.h b/src/mame/includes/warpwarp.h
index 8f9b9895bdf..da3eb75ac29 100644
--- a/src/mame/includes/warpwarp.h
+++ b/src/mame/includes/warpwarp.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Chris Hardy
 #include "audio/warpwarp.h"
 
diff --git a/src/mame/machine/konami1.c b/src/mame/machine/konami1.c
index bdd17b7ed35..75d4a2b01b4 100644
--- a/src/mame/machine/konami1.c
+++ b/src/mame/machine/konami1.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Nicola Salmoria, Chris Hardy
 /***************************************************************************
 
diff --git a/src/mame/machine/konami1.h b/src/mame/machine/konami1.h
index e66bbd33442..00697959658 100644
--- a/src/mame/machine/konami1.h
+++ b/src/mame/machine/konami1.h
@@ -1,3 +1,3 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Nicola Salmoria, Chris Hardy
 UINT8 *konami1_decode(running_machine &machine, const char *cpu);
diff --git a/src/mame/video/hyperspt.c b/src/mame/video/hyperspt.c
index b339a2c39b5..8b5a1502781 100644
--- a/src/mame/video/hyperspt.c
+++ b/src/mame/video/hyperspt.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Chris Hardy
 /***************************************************************************
 
diff --git a/src/mame/video/megazone.c b/src/mame/video/megazone.c
index f85fa158b17..8eb713a6fe5 100644
--- a/src/mame/video/megazone.c
+++ b/src/mame/video/megazone.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Chris Hardy
 /***************************************************************************
 
diff --git a/src/mame/video/rocnrope.c b/src/mame/video/rocnrope.c
index bf64b8c0d1d..ddbafdea494 100644
--- a/src/mame/video/rocnrope.c
+++ b/src/mame/video/rocnrope.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Chris Hardy
 /***************************************************************************
 
diff --git a/src/mame/video/spacefb.c b/src/mame/video/spacefb.c
index 90ed9bfecf5..d5a829aaee2 100644
--- a/src/mame/video/spacefb.c
+++ b/src/mame/video/spacefb.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Chris Hardy
 /***************************************************************************
 
diff --git a/src/mame/video/trackfld.c b/src/mame/video/trackfld.c
index 8ea6a3ac327..789009e5f5b 100644
--- a/src/mame/video/trackfld.c
+++ b/src/mame/video/trackfld.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Chris Hardy
 /***************************************************************************
 
diff --git a/src/mame/video/warpwarp.c b/src/mame/video/warpwarp.c
index 09a3b089bf0..ada74e22dab 100644
--- a/src/mame/video/warpwarp.c
+++ b/src/mame/video/warpwarp.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Chris Hardy
 /***************************************************************************