diff --git a/src/emu/sound/tiasound.c b/src/emu/sound/tiasound.c
index b2e9eb10a34..960520b6b79 100644
--- a/src/emu/sound/tiasound.c
+++ b/src/emu/sound/tiasound.c
@@ -1,5 +1,5 @@
-// license:???
-// copyright-holders:???
+// license:GPL-2.0+
+// copyright-holders:Ron Fries,Dan Boris
 /*****************************************************************************/
 /*                                                                           */
 /* Module:  TIA Chip Sound Simulator                                         */
diff --git a/src/mame/audio/jedi.c b/src/mame/audio/jedi.c
index 26d8381e5ce..6abf830adc3 100644
--- a/src/mame/audio/jedi.c
+++ b/src/mame/audio/jedi.c
@@ -1,5 +1,5 @@
-// license:???
-// copyright-holders:???
+// license:BSD-3-Clause
+// copyright-holders:Dan Boris
 /***************************************************************************
 
     Atari Return of the Jedi hardware
diff --git a/src/mame/drivers/arabian.c b/src/mame/drivers/arabian.c
index 55b2830ead4..6979d7d9d59 100644
--- a/src/mame/drivers/arabian.c
+++ b/src/mame/drivers/arabian.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Dan Boris
 /***************************************************************************
 
diff --git a/src/mame/drivers/hitme.c b/src/mame/drivers/hitme.c
index 77aff845738..60ab820b532 100644
--- a/src/mame/drivers/hitme.c
+++ b/src/mame/drivers/hitme.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Dan Boris
 /* Hit Me driver by the EMUL8, led by Dan Boris */
 
diff --git a/src/mame/drivers/jedi.c b/src/mame/drivers/jedi.c
index d545c16f005..babb4e5904c 100644
--- a/src/mame/drivers/jedi.c
+++ b/src/mame/drivers/jedi.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Dan Boris
 /***************************************************************************
 
diff --git a/src/mame/includes/arabian.h b/src/mame/includes/arabian.h
index 5fe18efe7b3..89d68c8496c 100644
--- a/src/mame/includes/arabian.h
+++ b/src/mame/includes/arabian.h
@@ -1,5 +1,5 @@
-// license:???
-// copyright-holders:???
+// license:BSD-3-Clause
+// copyright-holders:Dan Boris
 /***************************************************************************
 
     Sun Electronics Arabian hardware
diff --git a/src/mame/video/jedi.c b/src/mame/video/jedi.c
index f9345242dc9..8884ec944b6 100644
--- a/src/mame/video/jedi.c
+++ b/src/mame/video/jedi.c
@@ -1,5 +1,5 @@
-// license:???
-// copyright-holders:???
+// license:BSD-3-Clause
+// copyright-holders:Dan Boris
 /***************************************************************************
 
     Atari Return of the Jedi hardware
diff --git a/src/mess/drivers/a7800.c b/src/mess/drivers/a7800.c
index 568029240de..d4b52f97204 100644
--- a/src/mess/drivers/a7800.c
+++ b/src/mess/drivers/a7800.c
@@ -1,5 +1,5 @@
-// license:???
-// copyright-holders:???
+// license:BSD-3-Clause
+// copyright-holders:Dan Boris
 /***************************************************************************
 
   a7800.c