diff --git a/src/emu/cpu/pic16c5x/16c5xdsm.c b/src/emu/cpu/pic16c5x/16c5xdsm.c
index badf9d022ac..45ff3154ec1 100644
--- a/src/emu/cpu/pic16c5x/16c5xdsm.c
+++ b/src/emu/cpu/pic16c5x/16c5xdsm.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tony La Porta
 	/**************************************************************************\
 	*                      Microchip PIC16C5x Emulator                         *
diff --git a/src/emu/cpu/pic16c5x/dis16c5x.c b/src/emu/cpu/pic16c5x/dis16c5x.c
index bbbb6b37756..5b108310b5f 100644
--- a/src/emu/cpu/pic16c5x/dis16c5x.c
+++ b/src/emu/cpu/pic16c5x/dis16c5x.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tony La Porta
 	/**************************************************************************\
 	*                      Microchip PIC16C5x Emulator                         *
diff --git a/src/emu/cpu/pic16c5x/pic16c5x.c b/src/emu/cpu/pic16c5x/pic16c5x.c
index 3dbaa5ccb62..0c78f34eebd 100644
--- a/src/emu/cpu/pic16c5x/pic16c5x.c
+++ b/src/emu/cpu/pic16c5x/pic16c5x.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tony La Porta
 	/**************************************************************************\
 	*                      Microchip PIC16C5x Emulator                         *
diff --git a/src/emu/cpu/pic16c5x/pic16c5x.h b/src/emu/cpu/pic16c5x/pic16c5x.h
index 6e39bf41a2b..5f45ca3bf33 100644
--- a/src/emu/cpu/pic16c5x/pic16c5x.h
+++ b/src/emu/cpu/pic16c5x/pic16c5x.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tony La Porta
 	/**************************************************************************\
 	*                      Microchip PIC16C5x Emulator                         *
diff --git a/src/emu/cpu/pic16c62x/16c62xdsm.c b/src/emu/cpu/pic16c62x/16c62xdsm.c
index b79e24ad0b4..5bdd824dc16 100644
--- a/src/emu/cpu/pic16c62x/16c62xdsm.c
+++ b/src/emu/cpu/pic16c62x/16c62xdsm.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tony La Porta
 	/**************************************************************************\
 	*                  Microchip PIC16C62X Emulator                            *
diff --git a/src/emu/cpu/pic16c62x/dis16c62x.c b/src/emu/cpu/pic16c62x/dis16c62x.c
index 8c674fa0235..c87acd87018 100644
--- a/src/emu/cpu/pic16c62x/dis16c62x.c
+++ b/src/emu/cpu/pic16c62x/dis16c62x.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tony La Porta
 	/**************************************************************************\
 	*                  Microchip PIC16C62X Emulator                            *
diff --git a/src/emu/cpu/pic16c62x/pic16c62x.c b/src/emu/cpu/pic16c62x/pic16c62x.c
index 8d73d6e337b..42e92b0addf 100644
--- a/src/emu/cpu/pic16c62x/pic16c62x.c
+++ b/src/emu/cpu/pic16c62x/pic16c62x.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tony La Porta
 	/**************************************************************************\
 	*                  Microchip PIC16C62X Emulator                            *
diff --git a/src/emu/cpu/pic16c62x/pic16c62x.h b/src/emu/cpu/pic16c62x/pic16c62x.h
index 5178855923c..55e78a9a081 100644
--- a/src/emu/cpu/pic16c62x/pic16c62x.h
+++ b/src/emu/cpu/pic16c62x/pic16c62x.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tony La Porta
 	/**************************************************************************\
 	*                  Microchip PIC16C62X Emulator                            *
diff --git a/src/emu/cpu/tms32010/32010dsm.c b/src/emu/cpu/tms32010/32010dsm.c
index 4c005e065df..a4c0fd5294c 100644
--- a/src/emu/cpu/tms32010/32010dsm.c
+++ b/src/emu/cpu/tms32010/32010dsm.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tony La Porta
 	/**************************************************************************\
 	*                Texas Instruments TMS32010 DSP Disassembler               *
diff --git a/src/emu/cpu/tms32010/dis32010.c b/src/emu/cpu/tms32010/dis32010.c
index 544a72a21cb..adc18d7c34d 100644
--- a/src/emu/cpu/tms32010/dis32010.c
+++ b/src/emu/cpu/tms32010/dis32010.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tony La Porta
 	/**************************************************************************\
 	*               Texas Instruments TMS32010 DSP Disassembler                *
diff --git a/src/emu/cpu/tms32010/tms32010.c b/src/emu/cpu/tms32010/tms32010.c
index 26a65679efb..a90a697f58b 100644
--- a/src/emu/cpu/tms32010/tms32010.c
+++ b/src/emu/cpu/tms32010/tms32010.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tony La Porta
 	/**************************************************************************\
 	*                 Texas Instruments TMS32010 DSP Emulator                  *
diff --git a/src/emu/cpu/tms32010/tms32010.h b/src/emu/cpu/tms32010/tms32010.h
index 05ff3e3fe73..6059d1efa57 100644
--- a/src/emu/cpu/tms32010/tms32010.h
+++ b/src/emu/cpu/tms32010/tms32010.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tony La Porta
 	/**************************************************************************\
 	*                 Texas Instruments TMS32010 DSP Emulator                  *
diff --git a/src/emu/cpu/tms32025/32025dsm.c b/src/emu/cpu/tms32025/32025dsm.c
index 416f0aeb5ab..d266c468d65 100644
--- a/src/emu/cpu/tms32025/32025dsm.c
+++ b/src/emu/cpu/tms32025/32025dsm.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tony La Porta, hap
 	/**************************************************************************\
 	*              Texas Instruments TMS320x25 DSP Disassembler                *
diff --git a/src/emu/cpu/tms32025/dis32025.c b/src/emu/cpu/tms32025/dis32025.c
index 8a4280b3bf7..212c5339627 100644
--- a/src/emu/cpu/tms32025/dis32025.c
+++ b/src/emu/cpu/tms32025/dis32025.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tony La Porta, hap
 	/**************************************************************************\
 	*              Texas Instruments TMS320x25 DSP Disassembler                *
diff --git a/src/emu/cpu/tms32025/tms32025.c b/src/emu/cpu/tms32025/tms32025.c
index 718ced81e39..91fa0423e1c 100644
--- a/src/emu/cpu/tms32025/tms32025.c
+++ b/src/emu/cpu/tms32025/tms32025.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tony La Porta, hap
 	/**************************************************************************\
 	*                Texas Instruments TMS320x25 DSP Emulator                  *
diff --git a/src/emu/cpu/tms32025/tms32025.h b/src/emu/cpu/tms32025/tms32025.h
index 82139bf2ef3..5992012d08e 100644
--- a/src/emu/cpu/tms32025/tms32025.h
+++ b/src/emu/cpu/tms32025/tms32025.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tony La Porta, hap
 	/**************************************************************************\
 	*                Texas Instruments TMS320x25 DSP Emulator                  *
diff --git a/src/emu/machine/at45dbxx.c b/src/emu/machine/at45dbxx.c
index 2f5429b8114..2890f8784d4 100644
--- a/src/emu/machine/at45dbxx.c
+++ b/src/emu/machine/at45dbxx.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tim Schuerewegen
 /*
 
diff --git a/src/emu/machine/at45dbxx.h b/src/emu/machine/at45dbxx.h
index 4a977c38722..a1e41e88657 100644
--- a/src/emu/machine/at45dbxx.h
+++ b/src/emu/machine/at45dbxx.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tim Schuerewegen
 /*
 
diff --git a/src/emu/machine/pcf8593.c b/src/emu/machine/pcf8593.c
index 72804642466..48e002fdf2d 100644
--- a/src/emu/machine/pcf8593.c
+++ b/src/emu/machine/pcf8593.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tim Schuerewegen
 /*********************************************************************
 
diff --git a/src/emu/machine/pcf8593.h b/src/emu/machine/pcf8593.h
index 3cf9f3c3957..2475f0a2dfe 100644
--- a/src/emu/machine/pcf8593.h
+++ b/src/emu/machine/pcf8593.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tim Schuerewegen
 /*********************************************************************
 
diff --git a/src/emu/machine/s3c2400.c b/src/emu/machine/s3c2400.c
index 86a2d4582b5..d47e81b08ce 100644
--- a/src/emu/machine/s3c2400.c
+++ b/src/emu/machine/s3c2400.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tim Schuerewegen
 /*******************************************************************************
 
diff --git a/src/emu/machine/s3c2400.h b/src/emu/machine/s3c2400.h
index e88af70f208..f274e5ad36d 100644
--- a/src/emu/machine/s3c2400.h
+++ b/src/emu/machine/s3c2400.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tim Schuerewegen
 /*******************************************************************************
 
diff --git a/src/emu/machine/s3c2410.c b/src/emu/machine/s3c2410.c
index c3b90ad1646..ac5bec78180 100644
--- a/src/emu/machine/s3c2410.c
+++ b/src/emu/machine/s3c2410.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tim Schuerewegen
 /*******************************************************************************
 
diff --git a/src/emu/machine/s3c2410.h b/src/emu/machine/s3c2410.h
index 9f811e6a8b9..6ad02c90d1e 100644
--- a/src/emu/machine/s3c2410.h
+++ b/src/emu/machine/s3c2410.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tim Schuerewegen
 /*******************************************************************************
 
diff --git a/src/emu/machine/s3c2440.c b/src/emu/machine/s3c2440.c
index 3612fb07d68..eaa0301d157 100644
--- a/src/emu/machine/s3c2440.c
+++ b/src/emu/machine/s3c2440.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tim Schuerewegen
 /*******************************************************************************
 
diff --git a/src/emu/machine/s3c2440.h b/src/emu/machine/s3c2440.h
index 7382c6e9366..b76148eca09 100644
--- a/src/emu/machine/s3c2440.h
+++ b/src/emu/machine/s3c2440.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tim Schuerewegen
 /*******************************************************************************
 
diff --git a/src/emu/machine/s3c44b0.c b/src/emu/machine/s3c44b0.c
index 2719a157c99..fb9d3f15036 100644
--- a/src/emu/machine/s3c44b0.c
+++ b/src/emu/machine/s3c44b0.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tim Schuerewegen
 /*******************************************************************************
 
diff --git a/src/emu/machine/s3c44b0.h b/src/emu/machine/s3c44b0.h
index 5a4ee95f61f..462bda280d2 100644
--- a/src/emu/machine/s3c44b0.h
+++ b/src/emu/machine/s3c44b0.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tim Schuerewegen
 /*******************************************************************************
 
diff --git a/src/emu/video/gf4500.c b/src/emu/video/gf4500.c
index 8fa8cdcb19b..48e2f8495c3 100644
--- a/src/emu/video/gf4500.c
+++ b/src/emu/video/gf4500.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tim Schuerewegen
 /*
 
diff --git a/src/emu/video/gf4500.h b/src/emu/video/gf4500.h
index 382f15adc2c..eb246ec0ea9 100644
--- a/src/emu/video/gf4500.h
+++ b/src/emu/video/gf4500.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tim Schuerewegen
 /*
 
diff --git a/src/emu/video/hd66421.c b/src/emu/video/hd66421.c
index aff6154a6c4..af67be24d78 100644
--- a/src/emu/video/hd66421.c
+++ b/src/emu/video/hd66421.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tim Schuerewegen
 /*
 
diff --git a/src/emu/video/hd66421.h b/src/emu/video/hd66421.h
index 48b42d819e1..baed72ad30c 100644
--- a/src/emu/video/hd66421.h
+++ b/src/emu/video/hd66421.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tim Schuerewegen
 /***************************************************************************
 
diff --git a/src/mame/audio/beezer.c b/src/mame/audio/beezer.c
index 567a01a7b18..d1bec0b06fb 100644
--- a/src/mame/audio/beezer.c
+++ b/src/mame/audio/beezer.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mathis Rosenhauer
 /*************************************************************************
 
diff --git a/src/mame/audio/cchasm.c b/src/mame/audio/cchasm.c
index 8d0ae240ec1..1672f2b314d 100644
--- a/src/mame/audio/cchasm.c
+++ b/src/mame/audio/cchasm.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mathis Rosenhauer
 /***************************************************************************
 
diff --git a/src/mame/drivers/aztarac.c b/src/mame/drivers/aztarac.c
index 4e9e96ef903..aabbba233bc 100644
--- a/src/mame/drivers/aztarac.c
+++ b/src/mame/drivers/aztarac.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:???
 /***************************************************************************
 
diff --git a/src/mame/drivers/beezer.c b/src/mame/drivers/beezer.c
index c01c9f3649a..97e87497622 100644
--- a/src/mame/drivers/beezer.c
+++ b/src/mame/drivers/beezer.c
@@ -1,5 +1,4 @@
-// license:???
-// copyright-holders:Mathis Rosenhauer
+// license:???// license:BSD-3-Clause// copyright-holders:Mathis Rosenhauer
 /*
 
   Beezer - (c) 1982 Tong Electronic
diff --git a/src/mame/drivers/cchasm.c b/src/mame/drivers/cchasm.c
index 49e7b60828f..6a74536cadd 100644
--- a/src/mame/drivers/cchasm.c
+++ b/src/mame/drivers/cchasm.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mathis Rosenhauer
 /***************************************************************************
 
diff --git a/src/mame/drivers/fuukifg3.c b/src/mame/drivers/fuukifg3.c
index 59e1ba8efc2..e41e9099bcf 100644
--- a/src/mame/drivers/fuukifg3.c
+++ b/src/mame/drivers/fuukifg3.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Paul Priest, David Haywood
 /***************************************************************************
 
diff --git a/src/mame/drivers/holeland.c b/src/mame/drivers/holeland.c
index 4bc23ac106f..c81e97ee057 100644
--- a/src/mame/drivers/holeland.c
+++ b/src/mame/drivers/holeland.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mathis Rosenhauer
 /***************************************************************************
 
diff --git a/src/mame/drivers/mcatadv.c b/src/mame/drivers/mcatadv.c
index 1f5ffb37217..acac838fd8a 100644
--- a/src/mame/drivers/mcatadv.c
+++ b/src/mame/drivers/mcatadv.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Paul Priest, David Haywood
 /******************************************************************************
 
diff --git a/src/mame/drivers/namcond1.c b/src/mame/drivers/namcond1.c
index f44459e0910..6749c6b317f 100644
--- a/src/mame/drivers/namcond1.c
+++ b/src/mame/drivers/namcond1.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mark McDougall, R. Belmont
 /*************************************************************
 
diff --git a/src/mame/drivers/oneshot.c b/src/mame/drivers/oneshot.c
index d4e4ade8fc0..5f282a41a76 100644
--- a/src/mame/drivers/oneshot.c
+++ b/src/mame/drivers/oneshot.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:David Haywood, Paul Priest
 /* One Shot One Kill & Maddonna
    Driver by David Haywood and Paul Priest
diff --git a/src/mame/drivers/psikyo4.c b/src/mame/drivers/psikyo4.c
index 96d789b76b0..e2fb6d99d12 100644
--- a/src/mame/drivers/psikyo4.c
+++ b/src/mame/drivers/psikyo4.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:David Haywood, Paul Priest
 /*----------------------------------------------------------------
    Psikyo PS4 SH-2 Based Systems
diff --git a/src/mame/drivers/psikyosh.c b/src/mame/drivers/psikyosh.c
index d16c6267f84..19eb3b07d4f 100644
--- a/src/mame/drivers/psikyosh.c
+++ b/src/mame/drivers/psikyosh.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:David Haywood, Paul Priest
 /*----------------------------------------------------------------
    Psikyo PS3/PS5/PS5v2 SH-2 Based Systems
diff --git a/src/mame/drivers/stfight.c b/src/mame/drivers/stfight.c
index c47cb6d1c0d..75467910f10 100644
--- a/src/mame/drivers/stfight.c
+++ b/src/mame/drivers/stfight.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mark McDougall
 /*****************************          (by Mark McDougall)
  *** STREET FIGHT hardware ***  This has been adapted from the excellent
diff --git a/src/mame/drivers/suprnova.c b/src/mame/drivers/suprnova.c
index 3d467517c06..6f31c82138d 100644
--- a/src/mame/drivers/suprnova.c
+++ b/src/mame/drivers/suprnova.c
@@ -1,5 +1,5 @@
-// license:???
-// copyright-holders:David Haywood, Sylvain Glaize
+// license:BSD-3-Clause
+// copyright-holders:David Haywood, Sylvain Glaize, Paul Priest, Olivier Galibert
 /*
    Super Kaneko Nova System
     Original Driver by Sylvain Glaize
diff --git a/src/mame/drivers/vectrex.c b/src/mame/drivers/vectrex.c
index cf1ac1b8046..297f55cb28c 100644
--- a/src/mame/drivers/vectrex.c
+++ b/src/mame/drivers/vectrex.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mathis Rosenhauer
 /*****************************************************************
 
diff --git a/src/mame/drivers/vertigo.c b/src/mame/drivers/vertigo.c
index ecb7daefe28..fb6377f1e13 100644
--- a/src/mame/drivers/vertigo.c
+++ b/src/mame/drivers/vertigo.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mathis Rosenhauer
 /***************************************************************************
 
diff --git a/src/mame/includes/beezer.h b/src/mame/includes/beezer.h
index e51fa9228cf..44dfa22f341 100644
--- a/src/mame/includes/beezer.h
+++ b/src/mame/includes/beezer.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mathis Rosenhauer
 #include "machine/6522via.h"
 #include "cpu/m6809/m6809.h"
diff --git a/src/mame/includes/cchasm.h b/src/mame/includes/cchasm.h
index 81d4984ea64..4824190760b 100644
--- a/src/mame/includes/cchasm.h
+++ b/src/mame/includes/cchasm.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mathis Rosenhauer
 /*************************************************************************
 
diff --git a/src/mame/includes/fuukifg3.h b/src/mame/includes/fuukifg3.h
index c6341098f7b..57fe4c1e811 100644
--- a/src/mame/includes/fuukifg3.h
+++ b/src/mame/includes/fuukifg3.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Paul Priest, David Haywood
 #include "video/fuukifg.h"
 
diff --git a/src/mame/includes/holeland.h b/src/mame/includes/holeland.h
index ea3822f16b7..02b6da3a281 100644
--- a/src/mame/includes/holeland.h
+++ b/src/mame/includes/holeland.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mathis Rosenhauer
 /*************************************************************************
 
diff --git a/src/mame/includes/mcatadv.h b/src/mame/includes/mcatadv.h
index 85588fbb714..5c7f5bf1cb0 100644
--- a/src/mame/includes/mcatadv.h
+++ b/src/mame/includes/mcatadv.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Paul Priest, David Haywood
 
 class mcatadv_state : public driver_device
diff --git a/src/mame/includes/namcond1.h b/src/mame/includes/namcond1.h
index 8a81f10fc7b..3cc1d6c8288 100644
--- a/src/mame/includes/namcond1.h
+++ b/src/mame/includes/namcond1.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mark McDougall, R. Belmont
 /***************************************************************************
 
diff --git a/src/mame/includes/oneshot.h b/src/mame/includes/oneshot.h
index 5c911b0de2e..8e4ef5dc814 100644
--- a/src/mame/includes/oneshot.h
+++ b/src/mame/includes/oneshot.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:David Haywood, Paul Priest
 #include "sound/okim6295.h"
 
diff --git a/src/mame/includes/psikyo4.h b/src/mame/includes/psikyo4.h
index c1f6e323850..214d417217b 100644
--- a/src/mame/includes/psikyo4.h
+++ b/src/mame/includes/psikyo4.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:David Haywood, Paul Priest
 /*************************************************************************
 
diff --git a/src/mame/includes/psikyosh.h b/src/mame/includes/psikyosh.h
index 28c42da5313..1da9d161b13 100644
--- a/src/mame/includes/psikyosh.h
+++ b/src/mame/includes/psikyosh.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:David Haywood, Paul Priest
 #include "video/bufsprite.h"
 #include "machine/eepromser.h"
diff --git a/src/mame/includes/stfight.h b/src/mame/includes/stfight.h
index 4bd03c6da2a..48e66bdd91c 100644
--- a/src/mame/includes/stfight.h
+++ b/src/mame/includes/stfight.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mark McDougall
 #include "sound/msm5205.h"
 
diff --git a/src/mame/includes/vectrex.h b/src/mame/includes/vectrex.h
index cc47f139875..b73ff2b71d6 100644
--- a/src/mame/includes/vectrex.h
+++ b/src/mame/includes/vectrex.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mathis Rosenhauer
 /*****************************************************************************
  *
diff --git a/src/mame/includes/vertigo.h b/src/mame/includes/vertigo.h
index b1dbf21934d..bac9fcc61ad 100644
--- a/src/mame/includes/vertigo.h
+++ b/src/mame/includes/vertigo.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mathis Rosenhauer
 /*************************************************************************
 
diff --git a/src/mame/machine/beezer.c b/src/mame/machine/beezer.c
index aa5914554a0..42984c26f32 100644
--- a/src/mame/machine/beezer.c
+++ b/src/mame/machine/beezer.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mathis Rosenhauer
 #include "emu.h"
 #include "cpu/m6809/m6809.h"
diff --git a/src/mame/machine/cchasm.c b/src/mame/machine/cchasm.c
index b3103fd5639..0218a9b98e8 100644
--- a/src/mame/machine/cchasm.c
+++ b/src/mame/machine/cchasm.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mathis Rosenhauer
 /***************************************************************************
 
diff --git a/src/mame/machine/namcond1.c b/src/mame/machine/namcond1.c
index d9b308e8fbf..2fdca7a7fd1 100644
--- a/src/mame/machine/namcond1.c
+++ b/src/mame/machine/namcond1.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mark McDougall, R. Belmont
 /***************************************************************************
 
diff --git a/src/mame/machine/stfight.c b/src/mame/machine/stfight.c
index 8a5d98e05d9..ff6e07476a5 100644
--- a/src/mame/machine/stfight.c
+++ b/src/mame/machine/stfight.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mark McDougall
 /***************************************************************************
 
diff --git a/src/mame/machine/vectrex.c b/src/mame/machine/vectrex.c
index 1415aedcc56..ca64a1cd23c 100644
--- a/src/mame/machine/vectrex.c
+++ b/src/mame/machine/vectrex.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mathis Rosenhauer
 #include "emu.h"
 #include "cpu/m6809/m6809.h"
diff --git a/src/mame/machine/vertigo.c b/src/mame/machine/vertigo.c
index 519701d4631..63d0eb50aed 100644
--- a/src/mame/machine/vertigo.c
+++ b/src/mame/machine/vertigo.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mathis Rosenhauer
 /*************************************************************************
 
diff --git a/src/mame/video/beezer.c b/src/mame/video/beezer.c
index 2c7c31fea94..b5ad3cca470 100644
--- a/src/mame/video/beezer.c
+++ b/src/mame/video/beezer.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mathis Rosenhauer
 #include "emu.h"
 #include "cpu/m6809/m6809.h"
diff --git a/src/mame/video/cchasm.c b/src/mame/video/cchasm.c
index 50552d9cf97..582974db290 100644
--- a/src/mame/video/cchasm.c
+++ b/src/mame/video/cchasm.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mathis Rosenhauer
 /***************************************************************************
 
diff --git a/src/mame/video/fuukifg3.c b/src/mame/video/fuukifg3.c
index 43eb268865b..ab52cd61d7c 100644
--- a/src/mame/video/fuukifg3.c
+++ b/src/mame/video/fuukifg3.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Paul Priest, David Haywood
 /***************************************************************************
 
diff --git a/src/mame/video/holeland.c b/src/mame/video/holeland.c
index 66b275fa59f..2c220eeca74 100644
--- a/src/mame/video/holeland.c
+++ b/src/mame/video/holeland.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mathis Rosenhauer
 /***************************************************************************
 
diff --git a/src/mame/video/mcatadv.c b/src/mame/video/mcatadv.c
index e8c048790bd..e6f26d79dbd 100644
--- a/src/mame/video/mcatadv.c
+++ b/src/mame/video/mcatadv.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Paul Priest, David Haywood
 /* Magical Cat Adventure / Nostradamus Video Hardware */
 
diff --git a/src/mame/video/oneshot.c b/src/mame/video/oneshot.c
index 76a1dd781d2..e870bffd65c 100644
--- a/src/mame/video/oneshot.c
+++ b/src/mame/video/oneshot.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:David Haywood, Paul Priest
 /* One Shot One Kill Video Hardware */
 
diff --git a/src/mame/video/psikyo4.c b/src/mame/video/psikyo4.c
index 25ec6e8def4..f6a70de1ebd 100644
--- a/src/mame/video/psikyo4.c
+++ b/src/mame/video/psikyo4.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:David Haywood, Paul Priest
 /*
 
diff --git a/src/mame/video/psikyosh.c b/src/mame/video/psikyosh.c
index 0597402e86f..0eb703853cd 100644
--- a/src/mame/video/psikyosh.c
+++ b/src/mame/video/psikyosh.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:David Haywood, Paul Priest
 /*
 Psikyo PS6406B (PS3v1/PS5/PS5v2):
diff --git a/src/mame/video/stfight.c b/src/mame/video/stfight.c
index 4571f641f09..c5b4d715579 100644
--- a/src/mame/video/stfight.c
+++ b/src/mame/video/stfight.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mark McDougall
 /***************************************************************************
 
diff --git a/src/mame/video/vectrex.c b/src/mame/video/vectrex.c
index a1af3e15667..fd857fe8993 100644
--- a/src/mame/video/vectrex.c
+++ b/src/mame/video/vectrex.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mathis Rosenhauer
 #include <math.h>
 #include "emu.h"
diff --git a/src/mame/video/vertigo.c b/src/mame/video/vertigo.c
index 5cfe012ea6c..3064d040e2d 100644
--- a/src/mame/video/vertigo.c
+++ b/src/mame/video/vertigo.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mathis Rosenhauer
 /*************************************************************************
 
diff --git a/src/mame/video/ygv608.c b/src/mame/video/ygv608.c
index 3f5f7141bec..a4784c21b56 100644
--- a/src/mame/video/ygv608.c
+++ b/src/mame/video/ygv608.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mark McDougall
 
 /*
diff --git a/src/mame/video/ygv608.h b/src/mame/video/ygv608.h
index f46e4b81aa2..54899d3e4d0 100644
--- a/src/mame/video/ygv608.h
+++ b/src/mame/video/ygv608.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mark McDougall
 #ifndef __YGV608_H__
 #define __YGV608_H__
diff --git a/src/mess/drivers/coleco.c b/src/mess/drivers/coleco.c
index f29909a1b9f..f6db761295a 100644
--- a/src/mess/drivers/coleco.c
+++ b/src/mess/drivers/coleco.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour, Ben Bruscella, Sean Young
 /*******************************************************************************************************
 
diff --git a/src/mess/drivers/cybiko.c b/src/mess/drivers/cybiko.c
index 600e0e42054..c7352403f5b 100644
--- a/src/mess/drivers/cybiko.c
+++ b/src/mess/drivers/cybiko.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tim Schuerewegen
 /*************************************************************************************
 
diff --git a/src/mess/drivers/gizmondo.c b/src/mess/drivers/gizmondo.c
index 535bc533497..09d05d3106d 100644
--- a/src/mess/drivers/gizmondo.c
+++ b/src/mess/drivers/gizmondo.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tim Schuerewegen
 /*******************************************************************************
 
diff --git a/src/mess/drivers/gp32.c b/src/mess/drivers/gp32.c
index dcd6e3c23dc..d864d490c1b 100644
--- a/src/mess/drivers/gp32.c
+++ b/src/mess/drivers/gp32.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tim Schuerewegen
 /**************************************************************************
  *
diff --git a/src/mess/drivers/hp49gp.c b/src/mess/drivers/hp49gp.c
index 70e5b78bf12..567325c9501 100644
--- a/src/mess/drivers/hp49gp.c
+++ b/src/mess/drivers/hp49gp.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tim Schuerewegen
 /*******************************************************************************
 
diff --git a/src/mess/drivers/juicebox.c b/src/mess/drivers/juicebox.c
index 288b28b2830..b3a7897080d 100644
--- a/src/mess/drivers/juicebox.c
+++ b/src/mess/drivers/juicebox.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tim Schuerewegen
 /*******************************************************************************
 
diff --git a/src/mess/drivers/mini2440.c b/src/mess/drivers/mini2440.c
index e233c8181e4..c9402e57a9c 100644
--- a/src/mess/drivers/mini2440.c
+++ b/src/mess/drivers/mini2440.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tim Schuerewegen
 /*******************************************************************************
 
diff --git a/src/mess/drivers/palmz22.c b/src/mess/drivers/palmz22.c
index 679d0eff163..1e3798927a8 100644
--- a/src/mess/drivers/palmz22.c
+++ b/src/mess/drivers/palmz22.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tim Schuerewegen
 /*******************************************************************************
 
diff --git a/src/mess/drivers/svi318.c b/src/mess/drivers/svi318.c
index 7db4cc0d366..6b518168c46 100644
--- a/src/mess/drivers/svi318.c
+++ b/src/mess/drivers/svi318.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Sean Young,Tomas Karlsson
 /*
 ** svi318.c : driver for Spectravideo SVI-318 and SVI-328
diff --git a/src/mess/includes/coleco.h b/src/mess/includes/coleco.h
index c8739c75446..7b91445e8e1 100644
--- a/src/mess/includes/coleco.h
+++ b/src/mess/includes/coleco.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour, Ben Bruscella, Sean Young
 #pragma once
 
diff --git a/src/mess/includes/cybiko.h b/src/mess/includes/cybiko.h
index fd401cbca09..f7ac742808f 100644
--- a/src/mess/includes/cybiko.h
+++ b/src/mess/includes/cybiko.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tim Schuerewegen
 /*****************************************************************************
  *
diff --git a/src/mess/includes/gp32.h b/src/mess/includes/gp32.h
index f0e0d59ae8a..a3754f5b9aa 100644
--- a/src/mess/includes/gp32.h
+++ b/src/mess/includes/gp32.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tim Schuerewegen
 #ifndef _GP32_H_
 #define _GP32_H_
diff --git a/src/mess/includes/svi318.h b/src/mess/includes/svi318.h
index 411f2f3a8a4..e55d91109e4 100644
--- a/src/mess/includes/svi318.h
+++ b/src/mess/includes/svi318.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Sean Young,Tomas Karlsson
 /*****************************************************************************
  *
diff --git a/src/mess/machine/coleco.c b/src/mess/machine/coleco.c
index 07854612368..82deef9aa8e 100644
--- a/src/mess/machine/coleco.c
+++ b/src/mess/machine/coleco.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour, Ben Bruscella, Sean Young
 #include "emu.h"
 #include "machine/coleco.h"
diff --git a/src/mess/machine/coleco.h b/src/mess/machine/coleco.h
index 4ba4ecd67e5..b7874b9c576 100644
--- a/src/mess/machine/coleco.h
+++ b/src/mess/machine/coleco.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Balfour, Ben Bruscella, Sean Young
 #pragma once
 
diff --git a/src/mess/machine/cybiko.c b/src/mess/machine/cybiko.c
index 36fe8b3f3db..be0991bf4fe 100644
--- a/src/mess/machine/cybiko.c
+++ b/src/mess/machine/cybiko.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tim Schuerewegen
 /*
 
diff --git a/src/mess/machine/docg3.c b/src/mess/machine/docg3.c
index 90ccbaef0b3..e0701987b7b 100644
--- a/src/mess/machine/docg3.c
+++ b/src/mess/machine/docg3.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tim Schuerewegen
 /*
 
diff --git a/src/mess/machine/docg3.h b/src/mess/machine/docg3.h
index e06b3c97a9b..0a00b446500 100644
--- a/src/mess/machine/docg3.h
+++ b/src/mess/machine/docg3.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tim Schuerewegen
 /*
 
diff --git a/src/mess/machine/svi318.c b/src/mess/machine/svi318.c
index aa2525d365b..2e22cd034d8 100644
--- a/src/mess/machine/svi318.c
+++ b/src/mess/machine/svi318.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Sean Young,Tomas Karlsson
 /*
 ** Spectravideo SVI-318 and SVI-328
diff --git a/src/mess/tools/imgtool/modules/cybiko.c b/src/mess/tools/imgtool/modules/cybiko.c
index 9b8eada792a..1fc2afd319b 100644
--- a/src/mess/tools/imgtool/modules/cybiko.c
+++ b/src/mess/tools/imgtool/modules/cybiko.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tim Schuerewegen
 /*
 
diff --git a/src/mess/tools/imgtool/modules/cybikoxt.c b/src/mess/tools/imgtool/modules/cybikoxt.c
index f44191e620e..a1908dc9c76 100644
--- a/src/mess/tools/imgtool/modules/cybikoxt.c
+++ b/src/mess/tools/imgtool/modules/cybikoxt.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Tim Schuerewegen
 /*