diff --git a/src/mame/audio/8080bw.cpp b/src/mame/audio/8080bw.cpp
index 3b12f867ef4..e9586acff61 100644
--- a/src/mame/audio/8080bw.cpp
+++ b/src/mame/audio/8080bw.cpp
@@ -1,5 +1,6 @@
-// license:???
-// copyright-holders:Michael Strutts,Nicola Salmoria,Tormod Tjaberg,Mirko Buffoni,Lee Taylor,Valerio Verrando,Marco Cassili,Zsolt Vasvari,Aaron Giles,Jonathan Gevaryahu,hap,Robbbert
+// license:BSD-3-Clause
+// copyright-holders:Nicola Salmoria, Tormod Tjaberg, Mirko Buffoni,Lee Taylor, Valerio Verrando, Zsolt Vasvari,Aaron Giles,Jonathan Gevaryahu,hap,Robbbert
+// thanks-to:Michael Strutts, Marco Cassili
 /* 8080bw.c *******************************************/
 
 #include "emu.h"
diff --git a/src/mame/audio/mw8080bw.cpp b/src/mame/audio/mw8080bw.cpp
index f1bcd852e94..3c2b7f7a43a 100644
--- a/src/mame/audio/mw8080bw.cpp
+++ b/src/mame/audio/mw8080bw.cpp
@@ -1,5 +1,6 @@
-// license:???
-// copyright-holders:Michael Strutts, Nicola Salmoria, Tormod Tjaberg, Mirko Buffoni,Lee Taylor, Valerio Verrando, Marco Cassili, Zsolt Vasvari,Derrick Renaud
+// license:BSD-3-Clause
+// copyright-holders:Nicola Salmoria, Tormod Tjaberg, Mirko Buffoni,Lee Taylor, Valerio Verrando, Zsolt Vasvari,Derrick Renaud
+// thanks-to:Michael Strutts, Marco Cassili
 /***************************************************************************
 
     Midway 8080-based black and white hardware
diff --git a/src/mame/drivers/8080bw.cpp b/src/mame/drivers/8080bw.cpp
index 58ac6f7deba..c69d365a8a9 100644
--- a/src/mame/drivers/8080bw.cpp
+++ b/src/mame/drivers/8080bw.cpp
@@ -1,5 +1,6 @@
-// license:???
-// copyright-holders:Michael Strutts,Nicola Salmoria,Tormod Tjaberg,Mirko Buffoni,Lee Taylor,Valerio Verrando,Marco Cassili,Zsolt Vasvari,Aaron Giles,Jonathan Gevaryahu,hap,Robbbert
+// license:BSD-3-Clause
+// copyright-holders:Nicola Salmoria, Tormod Tjaberg, Mirko Buffoni,Lee Taylor, Valerio Verrando, Zsolt Vasvari,Aaron Giles,Jonathan Gevaryahu,hap,Robbbert
+// thanks-to:Michael Strutts, Marco Cassili
 /*****************************************************************************
 
     8080bw.c
diff --git a/src/mame/drivers/asuka.cpp b/src/mame/drivers/asuka.cpp
index 46b93c81042..9574745f60e 100644
--- a/src/mame/drivers/asuka.cpp
+++ b/src/mame/drivers/asuka.cpp
@@ -1,5 +1,6 @@
 // license:BSD-3-Clause
 // copyright-holders:David Graves, Brian Troha
+// thanks-to:Richard Bush
 /***************************************************************************
 
 Asuka & Asuka  (+ Taito/Visco games on similar hardware)
diff --git a/src/mame/drivers/darius.cpp b/src/mame/drivers/darius.cpp
index 25720a28a2d..80202aa2645 100644
--- a/src/mame/drivers/darius.cpp
+++ b/src/mame/drivers/darius.cpp
@@ -1,5 +1,6 @@
 // license:???
 // copyright-holders:David Graves, Jarek Burczynski
+// thanks-to:Richard Bush
 /***************************************************************************
 
 Darius    (c) Taito 1986
diff --git a/src/mame/drivers/dec0.cpp b/src/mame/drivers/dec0.cpp
index 4bb0c6ad27d..98f7dee7861 100644
--- a/src/mame/drivers/dec0.cpp
+++ b/src/mame/drivers/dec0.cpp
@@ -1,5 +1,6 @@
 // license:BSD-3-Clause
 // copyright-holders:Bryan McPhail
+// thanks-to:Richard Bush
 /***************************************************************************
 
   Data East 16 bit games - Bryan McPhail, mish@tendril.co.uk
diff --git a/src/mame/drivers/exzisus.cpp b/src/mame/drivers/exzisus.cpp
index 8291560d45a..7cd7f2d8c8b 100644
--- a/src/mame/drivers/exzisus.cpp
+++ b/src/mame/drivers/exzisus.cpp
@@ -1,5 +1,6 @@
 // license:BSD-3-Clause
 // copyright-holders:Yochizo
+// thanks-to:Richard Bush
 /***************************************************************************
 
 Exzisus
diff --git a/src/mame/drivers/firefox.cpp b/src/mame/drivers/firefox.cpp
index 0c95b263c20..c9c2eab54ae 100644
--- a/src/mame/drivers/firefox.cpp
+++ b/src/mame/drivers/firefox.cpp
@@ -1,5 +1,6 @@
 // license:BSD-3-Clause
 // copyright-holders:smf, Aaron Giles, Chris Hardy
+// thanks-to:Scott Waye
 /***************************************************************************
 
     Atari Fire Fox hardware
diff --git a/src/mame/drivers/fortecar.cpp b/src/mame/drivers/fortecar.cpp
index c966484424f..979585829a3 100644
--- a/src/mame/drivers/fortecar.cpp
+++ b/src/mame/drivers/fortecar.cpp
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Angelo Salese, Roberto Fresca
 /*************************************************************************************************
 
diff --git a/src/mame/drivers/gammagic.cpp b/src/mame/drivers/gammagic.cpp
index 24b40422181..6fb03850748 100644
--- a/src/mame/drivers/gammagic.cpp
+++ b/src/mame/drivers/gammagic.cpp
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Grull Osgo
 /************************************************************************************
 
diff --git a/src/mame/drivers/junior.cpp b/src/mame/drivers/junior.cpp
index 5c9600282c9..9744712c9cc 100644
--- a/src/mame/drivers/junior.cpp
+++ b/src/mame/drivers/junior.cpp
@@ -1,5 +1,6 @@
-// license:???
-// copyright-holders:Robbbert, Manfred Schneider
+// license:BSD-3-Clause
+// copyright-holders:Robbbert
+// thanks-to:Manfred Schneider
 /***************************************************************************
 
         Elektor Junior
diff --git a/src/mame/drivers/kas89.cpp b/src/mame/drivers/kas89.cpp
index 872388374b2..7ae13148326 100644
--- a/src/mame/drivers/kas89.cpp
+++ b/src/mame/drivers/kas89.cpp
@@ -1,5 +1,6 @@
 // license:BSD-3-Clause
 // copyright-holders:Roberto Fresca
+// thanks-to:Iris Falbala,Rob Ragon
 /*************************************************************************************
 
   /\/\<< Kasino '89 >>/\/\
diff --git a/src/mame/drivers/magicfly.cpp b/src/mame/drivers/magicfly.cpp
index cf2c550a14f..f9cc51343ab 100644
--- a/src/mame/drivers/magicfly.cpp
+++ b/src/mame/drivers/magicfly.cpp
@@ -1,5 +1,6 @@
 // license:BSD-3-Clause
 // copyright-holders:Roberto Fresca
+// thanks-to:Iris Falbala,Rob Ragon
 /******************************************************************************
 
     MAGIC FLY
diff --git a/src/mame/drivers/majorpkr.cpp b/src/mame/drivers/majorpkr.cpp
index 2c157baccdb..7238599f40c 100644
--- a/src/mame/drivers/majorpkr.cpp
+++ b/src/mame/drivers/majorpkr.cpp
@@ -1,5 +1,6 @@
 // license:BSD-3-Clause
 // copyright-holders:Roberto Fresca
+// thanks-to:Tomasz Slanina,Rob Ragon
 /**********************************************************************************
 
   Major Poker / Major Joker
diff --git a/src/mame/drivers/midtunit.cpp b/src/mame/drivers/midtunit.cpp
index e96906f01d6..996086bfe05 100644
--- a/src/mame/drivers/midtunit.cpp
+++ b/src/mame/drivers/midtunit.cpp
@@ -1,5 +1,6 @@
-// license:???
-// copyright-holders:Alex Pasadyn, Zsolt Vasvari, Kurt Mahan, Ernesto Corvi, Aaron Giles
+// license:BSD-3-Clause
+// copyright-holders:Alex Pasadyn, Zsolt Vasvari, Ernesto Corvi, Aaron Giles
+// thanks-to:Kurt Mahan
 /*************************************************************************
 
     Midway T-unit system
diff --git a/src/mame/drivers/midwunit.cpp b/src/mame/drivers/midwunit.cpp
index 47090af6b82..f4670937e22 100644
--- a/src/mame/drivers/midwunit.cpp
+++ b/src/mame/drivers/midwunit.cpp
@@ -1,5 +1,6 @@
 // license:BSD-3-Clause
-// copyright-holders:Aaron Giles,Ernesto Corvi
+// copyright-holders:Alex Pasadyn, Zsolt Vasvari, Ernesto Corvi, Aaron Giles
+// thanks-to:Kurt Mahan
 /*************************************************************************
 
     Midway Wolf-unit system
diff --git a/src/mame/drivers/midyunit.cpp b/src/mame/drivers/midyunit.cpp
index 5c70e80232e..23eeacf8851 100644
--- a/src/mame/drivers/midyunit.cpp
+++ b/src/mame/drivers/midyunit.cpp
@@ -1,5 +1,6 @@
-// license:???
-// copyright-holders:Alex Pasadyn, Zsolt Vasvari, Kurt Mahan, Ernesto Corvi, Aaron Giles
+// license:BSD-3-Clause
+// copyright-holders:Alex Pasadyn, Zsolt Vasvari, Ernesto Corvi, Aaron Giles
+// thanks-to:Kurt Mahan
 /*************************************************************************
 
     Williams/Midway Y/Z-unit system
diff --git a/src/mame/drivers/mw8080bw.cpp b/src/mame/drivers/mw8080bw.cpp
index 3ad0b5a7adf..3dd1d71383c 100644
--- a/src/mame/drivers/mw8080bw.cpp
+++ b/src/mame/drivers/mw8080bw.cpp
@@ -1,5 +1,6 @@
-// license:???
-// copyright-holders:Michael Strutts, Nicola Salmoria, Tormod Tjaberg, Mirko Buffoni,Lee Taylor, Valerio Verrando, Marco Cassili, Zsolt Vasvari
+// license:BSD-3-Clause
+// copyright-holders:Nicola Salmoria, Tormod Tjaberg, Mirko Buffoni,Lee Taylor, Valerio Verrando, Zsolt Vasvari
+// thanks-to:Michael Strutts, Marco Cassili
 /***************************************************************************
 
     Midway 8080-based black and white hardware
diff --git a/src/mame/drivers/neogeo.cpp b/src/mame/drivers/neogeo.cpp
index 891ca4dfca8..738a16aae9d 100644
--- a/src/mame/drivers/neogeo.cpp
+++ b/src/mame/drivers/neogeo.cpp
@@ -1,5 +1,6 @@
-// license:???
-// copyright-holders:Bryan McPhail,Fuzz,Ernesto Corvi,Andrew Prime,Zsolt Vasvari
+// license:BSD-3-Clause
+// copyright-holders:Bryan McPhail,Ernesto Corvi,Andrew Prime,Zsolt Vasvari
+// thanks-to:Fuzz
 /***************************************************************************
 
     Neo-Geo hardware
diff --git a/src/mame/drivers/neogeo_noslot.cpp b/src/mame/drivers/neogeo_noslot.cpp
index c6a1bfd7f07..cf7d6d4334f 100644
--- a/src/mame/drivers/neogeo_noslot.cpp
+++ b/src/mame/drivers/neogeo_noslot.cpp
@@ -1,5 +1,6 @@
-// license:???
-// copyright-holders:Bryan McPhail,Fuzz,Ernesto Corvi,Andrew Prime,Zsolt Vasvari
+// license:BSD-3-Clause
+// copyright-holders:Bryan McPhail,Ernesto Corvi,Andrew Prime,Zsolt Vasvari
+// thanks-to:Fuzz
 
 // MAME NeoGeo code for single fixed slot 'shortname' configs
 // none of this is required by MESS or the slot-based implementation
diff --git a/src/mame/drivers/ng_aes.cpp b/src/mame/drivers/ng_aes.cpp
index 97666db8c81..c4f2fbc7620 100644
--- a/src/mame/drivers/ng_aes.cpp
+++ b/src/mame/drivers/ng_aes.cpp
@@ -1,5 +1,6 @@
-// license:???
-// copyright-holders:Bryan McPhail,Fuzz,Ernesto Corvi,Andrew Prime,Zsolt Vasvari
+// license:BSD-3-Clause
+// copyright-holders:Bryan McPhail,Ernesto Corvi,Andrew Prime,Zsolt Vasvari
+// thanks-to:Fuzz
 /***************************************************************************
 
     Neo-Geo AES hardware
diff --git a/src/mame/drivers/ninjaw.cpp b/src/mame/drivers/ninjaw.cpp
index 0f22eece30e..d513604fa96 100644
--- a/src/mame/drivers/ninjaw.cpp
+++ b/src/mame/drivers/ninjaw.cpp
@@ -1,5 +1,6 @@
 // license:BSD-3-Clause
 // copyright-holders:David Graves
+// thanks-to:Richard Bush
 /***************************************************************************
 
 Taito Triple Screen Games
diff --git a/src/mame/drivers/nmk16.cpp b/src/mame/drivers/nmk16.cpp
index 2ba37098c6d..7aa921a775b 100644
--- a/src/mame/drivers/nmk16.cpp
+++ b/src/mame/drivers/nmk16.cpp
@@ -1,5 +1,6 @@
-// license:???
-// copyright-holders:Mirko Buffoni,Richard Bush,Nicola Salmoria,Bryan McPhail,David Haywood,R. Belmont,Alex Marshall,Angelo Salese,Luca Elia
+// license:BSD-3-Clause
+// copyright-holders:Mirko Buffoni,Nicola Salmoria,Bryan McPhail,David Haywood,R. Belmont,Alex Marshall,Angelo Salese,Luca Elia
+// thanks-to:Richard Bush
 /********************************************************************
 
 Task Force Harrier       1989 UPL        68000 Z80           YM2203 2xOKIM6295
diff --git a/src/mame/drivers/opwolf.cpp b/src/mame/drivers/opwolf.cpp
index 5b24eda3ffb..9a60f39000c 100644
--- a/src/mame/drivers/opwolf.cpp
+++ b/src/mame/drivers/opwolf.cpp
@@ -1,5 +1,6 @@
 // license:???
 // copyright-holders:David Graves, Jarek Burczynski
+// thanks-to:Richard Bush
 /****************************************************************************
 
 Operation Wolf  (c) Taito 1987
diff --git a/src/mame/drivers/othunder.cpp b/src/mame/drivers/othunder.cpp
index ddc4513a135..da2ab7faf6b 100644
--- a/src/mame/drivers/othunder.cpp
+++ b/src/mame/drivers/othunder.cpp
@@ -1,5 +1,6 @@
 // license:BSD-3-Clause
 // copyright-holders:David Graves
+// thanks-to:Richard Bush
 /***************************************************************************
 
 Operation Thunderbolt  (Taito)
diff --git a/src/mame/drivers/quantum.cpp b/src/mame/drivers/quantum.cpp
index 59c9bde6e6f..20ea907c8c8 100644
--- a/src/mame/drivers/quantum.cpp
+++ b/src/mame/drivers/quantum.cpp
@@ -1,5 +1,6 @@
-// license:???
-// copyright-holders:Paul Forgey, Hedley Rainnie, Aaron Giles, Couriersud
+// license:BSD-3-Clause
+// copyright-holders:Hedley Rainnie, Aaron Giles, Couriersud
+// thanks-to: Paul Forgey
 /***************************************************************************
 
     Atari Quantum hardware
diff --git a/src/mame/drivers/superchs.cpp b/src/mame/drivers/superchs.cpp
index f19beb885cd..42e55078f4c 100644
--- a/src/mame/drivers/superchs.cpp
+++ b/src/mame/drivers/superchs.cpp
@@ -1,5 +1,6 @@
 // license:BSD-3-Clause
 // copyright-holders:Bryan McPhail, David Graves
+// thanks-to:Richard Bush
 /****************************************************************************
 
     Super Chase                         (c) 1992 Taito
diff --git a/src/mame/drivers/taito_f2.cpp b/src/mame/drivers/taito_f2.cpp
index 11394f81503..446bd8c56f3 100644
--- a/src/mame/drivers/taito_f2.cpp
+++ b/src/mame/drivers/taito_f2.cpp
@@ -1,5 +1,6 @@
 // license:BSD-3-Clause
 // copyright-holders:David Graves, Bryan McPhail, Brad Oliver, Andrew Prime, Brian Troha, Nicola Salmoria
+// thanks-to:Richard Bush
 /***************************************************************************
 
 Taito F2 System
diff --git a/src/mame/drivers/taito_h.cpp b/src/mame/drivers/taito_h.cpp
index 7100746e031..c2714413025 100644
--- a/src/mame/drivers/taito_h.cpp
+++ b/src/mame/drivers/taito_h.cpp
@@ -1,5 +1,6 @@
 // license:BSD-3-Clause
 // copyright-holders:Yochizo
+// thanks-to:Richard Bush
 /***************************************************************************
 
 Taito H system
diff --git a/src/mame/drivers/taito_x.cpp b/src/mame/drivers/taito_x.cpp
index 78a1a582a2a..39de0f8e06f 100644
--- a/src/mame/drivers/taito_x.cpp
+++ b/src/mame/drivers/taito_x.cpp
@@ -1,5 +1,6 @@
-// license:???
-// copyright-holders:Richard Bush, Howie Cohen, Yochizo
+// license:BSD-3-Clause
+// copyright-holders:Howie Cohen, Yochizo
+// thanks-to:Richard Bush
 /***************************************************************************
 
 
diff --git a/src/mame/drivers/taito_z.cpp b/src/mame/drivers/taito_z.cpp
index bb0ae1fb20b..ab98008880b 100644
--- a/src/mame/drivers/taito_z.cpp
+++ b/src/mame/drivers/taito_z.cpp
@@ -1,5 +1,6 @@
 // license:BSD-3-Clause
 // copyright-holders:David Graves
+// thanks-to:Richard Bush
 /***************************************************************************
 
 Taito Z System [twin 68K with optional Z80]
diff --git a/src/mame/drivers/toaplan2.cpp b/src/mame/drivers/toaplan2.cpp
index e12b8796e75..8d85b96fad2 100644
--- a/src/mame/drivers/toaplan2.cpp
+++ b/src/mame/drivers/toaplan2.cpp
@@ -1,5 +1,6 @@
 // license:BSD-3-Clause
 // copyright-holders:Quench, Yochizo, David Haywood
+// thanks-to:Richard Bush
 /*****************************************************************************
 
         ToaPlan      game hardware from 1991 - 1994
diff --git a/src/mame/drivers/topspeed.cpp b/src/mame/drivers/topspeed.cpp
index 74c44cfd8df..e265b3130f4 100644
--- a/src/mame/drivers/topspeed.cpp
+++ b/src/mame/drivers/topspeed.cpp
@@ -1,5 +1,6 @@
 // license:BSD-3-Clause
 // copyright-holders:David Graves
+// thanks-to:Richard Bush
 /***************+************************************************************
 
 Top Speed / Full Throttle    (c) Taito 1987
diff --git a/src/mame/drivers/vc4000.cpp b/src/mame/drivers/vc4000.cpp
index d6e72d6fbec..2dcc44e54e7 100644
--- a/src/mame/drivers/vc4000.cpp
+++ b/src/mame/drivers/vc4000.cpp
@@ -1,5 +1,6 @@
-// license:???
-// copyright-holders:Peter Trauner, Manfred Schneider, Robbbert
+// license:GPL-2.0+
+// copyright-holders:Peter Trauner, Robbbert
+// thanks-to:Manfred Schneider
 /******************************************************************************
  Peter Trauner May 2001
 
diff --git a/src/mame/drivers/warriorb.cpp b/src/mame/drivers/warriorb.cpp
index 9eace4dcb86..af46700c7be 100644
--- a/src/mame/drivers/warriorb.cpp
+++ b/src/mame/drivers/warriorb.cpp
@@ -1,5 +1,6 @@
 // license:BSD-3-Clause
 // copyright-holders:David Graves
+// thanks-to:Richard Bush
 /***************************************************************************
 
 Taito Dual Screen Games
diff --git a/src/mame/drivers/wgp.cpp b/src/mame/drivers/wgp.cpp
index e8ce89b5983..13f6de42582 100644
--- a/src/mame/drivers/wgp.cpp
+++ b/src/mame/drivers/wgp.cpp
@@ -1,5 +1,6 @@
 // license:BSD-3-Clause
 // copyright-holders:David Graves
+// thanks-to:Richard Bush
 /***************************************************************************
 
 World Grand Prix    (c) Taito Corporation 1989
diff --git a/src/mame/drivers/wwfsstar.cpp b/src/mame/drivers/wwfsstar.cpp
index 017d732e739..cf50f6c1835 100644
--- a/src/mame/drivers/wwfsstar.cpp
+++ b/src/mame/drivers/wwfsstar.cpp
@@ -1,5 +1,6 @@
 // license:BSD-3-Clause
 // copyright-holders:David Haywood
+// thanks-to:Richard Bush
 /*******************************************************************************
  WWF Superstars (C) 1989 Technos Japan  (drivers/wwfsstar.c)
 ********************************************************************************
diff --git a/src/mame/includes/8080bw.h b/src/mame/includes/8080bw.h
index 8dcbdef4fb4..da298c9174d 100644
--- a/src/mame/includes/8080bw.h
+++ b/src/mame/includes/8080bw.h
@@ -1,5 +1,6 @@
-// license:???
-// copyright-holders:Michael Strutts,Nicola Salmoria,Tormod Tjaberg,Mirko Buffoni,Lee Taylor,Valerio Verrando,Marco Cassili,Zsolt Vasvari,Aaron Giles,Jonathan Gevaryahu,hap,Robbbert
+// license:BSD-3-Clause
+// copyright-holders:Nicola Salmoria, Tormod Tjaberg, Mirko Buffoni,Lee Taylor, Valerio Verrando, Zsolt Vasvari
+// thanks-to:Michael Strutts, Marco Cassili
 /***************************************************************************
 
     8080-based black and white hardware
diff --git a/src/mame/includes/midtunit.h b/src/mame/includes/midtunit.h
index 270de45c377..22669ff5bce 100644
--- a/src/mame/includes/midtunit.h
+++ b/src/mame/includes/midtunit.h
@@ -1,5 +1,6 @@
-// license:???
-// copyright-holders:Alex Pasadyn, Zsolt Vasvari, Kurt Mahan, Ernesto Corvi, Aaron Giles
+// license:BSD-3-Clause
+// copyright-holders:Alex Pasadyn, Zsolt Vasvari, Ernesto Corvi, Aaron Giles
+// thanks-to:Kurt Mahan
 /*************************************************************************
 
     Driver for Midway T-unit games.
diff --git a/src/mame/includes/midyunit.h b/src/mame/includes/midyunit.h
index 124e1a9d29b..ea17134496b 100644
--- a/src/mame/includes/midyunit.h
+++ b/src/mame/includes/midyunit.h
@@ -1,5 +1,6 @@
-// license:???
-// copyright-holders:Alex Pasadyn, Zsolt Vasvari, Kurt Mahan, Ernesto Corvi, Aaron Giles
+// license:BSD-3-Clause
+// copyright-holders:Alex Pasadyn, Zsolt Vasvari, Ernesto Corvi, Aaron Giles
+// thanks-to:Kurt Mahan
 /*************************************************************************
 
     Williams/Midway Y/Z-unit system
diff --git a/src/mame/includes/mw8080bw.h b/src/mame/includes/mw8080bw.h
index 3544525dff9..a91a8cbe685 100644
--- a/src/mame/includes/mw8080bw.h
+++ b/src/mame/includes/mw8080bw.h
@@ -1,5 +1,6 @@
-// license:???
-// copyright-holders:Michael Strutts, Nicola Salmoria, Tormod Tjaberg, Mirko Buffoni,Lee Taylor, Valerio Verrando, Marco Cassili, Zsolt Vasvari
+// license:BSD-3-Clause
+// copyright-holders:Nicola Salmoria, Tormod Tjaberg, Mirko Buffoni,Lee Taylor, Valerio Verrando, Zsolt Vasvari
+// thanks-to:Michael Strutts, Marco Cassili
 /***************************************************************************
 
     Midway 8080-based black and white hardware
diff --git a/src/mame/includes/neogeo.h b/src/mame/includes/neogeo.h
index 1ca7b1479d9..ccbd9354d15 100644
--- a/src/mame/includes/neogeo.h
+++ b/src/mame/includes/neogeo.h
@@ -1,5 +1,6 @@
-// license:???
-// copyright-holders:Bryan McPhail,Fuzz,Ernesto Corvi,Andrew Prime,Zsolt Vasvari
+// license:BSD-3-Clause
+// copyright-holders:Bryan McPhail,Ernesto Corvi,Andrew Prime,Zsolt Vasvari
+// thanks-to:Fuzz
 /*************************************************************************
 
     Neo-Geo hardware
diff --git a/src/mame/includes/nmk16.h b/src/mame/includes/nmk16.h
index e0d73a3cbb1..ab9671f6265 100644
--- a/src/mame/includes/nmk16.h
+++ b/src/mame/includes/nmk16.h
@@ -1,5 +1,6 @@
-// license:???
-// copyright-holders:Mirko Buffoni,Richard Bush,Nicola Salmoria,Bryan McPhail,David Haywood,R. Belmont,Alex Marshall,Angelo Salese,Luca Elia
+// license:BSD-3-Clause
+// copyright-holders:Mirko Buffoni,Nicola Salmoria,Bryan McPhail,David Haywood,R. Belmont,Alex Marshall,Angelo Salese,Luca Elia
+// thanks-to:Richard Bush
 #include "machine/nmk112.h"
 #include "sound/okim6295.h"
 #include "machine/nmk004.h"
diff --git a/src/mame/includes/taito_x.h b/src/mame/includes/taito_x.h
index 46811adc45b..110777c878e 100644
--- a/src/mame/includes/taito_x.h
+++ b/src/mame/includes/taito_x.h
@@ -1,5 +1,6 @@
-// license:???
-// copyright-holders:Richard Bush, Howie Cohen, Yochizo
+// license:BSD-3-Clause
+// copyright-holders:Howie Cohen, Yochizo
+// thanks-to:Richard Bush
 #include "includes/seta.h"
 
 class taitox_state : public seta_state
diff --git a/src/mame/includes/vc4000.h b/src/mame/includes/vc4000.h
index 79542b686fa..f9f6720aecf 100644
--- a/src/mame/includes/vc4000.h
+++ b/src/mame/includes/vc4000.h
@@ -1,5 +1,6 @@
-// license:???
-// copyright-holders:Peter Trauner, Manfred Schneider, Robbbert
+// license:GPL-2.0+
+// copyright-holders:Peter Trauner, Robbbert
+// thanks-to:Manfred Schneider
 /*****************************************************************************
  *
  * includes/vc4000.h
diff --git a/src/mame/machine/cchip.cpp b/src/mame/machine/cchip.cpp
index 5ae6b5f3e0d..60a35b56ddf 100644
--- a/src/mame/machine/cchip.cpp
+++ b/src/mame/machine/cchip.cpp
@@ -1,5 +1,6 @@
 // license:BSD-3-Clause
 // copyright-holders:Bryan McPhail, Nicola Salmoria
+// thanks-to:Richard Bush
 /***************************************************************************
 
    cchip.c
diff --git a/src/mame/machine/midtunit.cpp b/src/mame/machine/midtunit.cpp
index dc4e62533e2..3983d15f9be 100644
--- a/src/mame/machine/midtunit.cpp
+++ b/src/mame/machine/midtunit.cpp
@@ -1,5 +1,6 @@
-// license:???
-// copyright-holders:Alex Pasadyn, Zsolt Vasvari, Kurt Mahan, Ernesto Corvi, Aaron Giles
+// license:BSD-3-Clause
+// copyright-holders:Alex Pasadyn, Zsolt Vasvari, Ernesto Corvi, Aaron Giles
+// thanks-to:Kurt Mahan
 /*************************************************************************
 
     Driver for Midway T-unit games.
diff --git a/src/mame/machine/midyunit.cpp b/src/mame/machine/midyunit.cpp
index a5d43682d3d..f91ae3bdfa2 100644
--- a/src/mame/machine/midyunit.cpp
+++ b/src/mame/machine/midyunit.cpp
@@ -1,5 +1,6 @@
-// license:???
-// copyright-holders:Alex Pasadyn, Zsolt Vasvari, Kurt Mahan, Ernesto Corvi, Aaron Giles
+// license:BSD-3-Clause
+// copyright-holders:Alex Pasadyn, Zsolt Vasvari, Ernesto Corvi, Aaron Giles
+// thanks-to:Kurt Mahan
 /*************************************************************************
 
     Williams/Midway Y/Z-unit system
diff --git a/src/mame/machine/mw8080bw.cpp b/src/mame/machine/mw8080bw.cpp
index ac10d9ad4fd..f9a2db214dd 100644
--- a/src/mame/machine/mw8080bw.cpp
+++ b/src/mame/machine/mw8080bw.cpp
@@ -1,5 +1,6 @@
-// license:???
-// copyright-holders:Michael Strutts, Nicola Salmoria, Tormod Tjaberg, Mirko Buffoni,Lee Taylor, Valerio Verrando, Marco Cassili, Zsolt Vasvari
+// license:BSD-3-Clause
+// copyright-holders:Nicola Salmoria, Tormod Tjaberg, Mirko Buffoni,Lee Taylor, Valerio Verrando, Zsolt Vasvari
+// thanks-to:Michael Strutts, Marco Cassili
 /***************************************************************************
 
     Midway 8080-based black and white hardware
diff --git a/src/mame/machine/neocrypt.cpp b/src/mame/machine/neocrypt.cpp
index 11bc0f2b217..13828aa8c45 100644
--- a/src/mame/machine/neocrypt.cpp
+++ b/src/mame/machine/neocrypt.cpp
@@ -1,5 +1,6 @@
-// license:???
-// copyright-holders:Bryan McPhail,Fuzz,Ernesto Corvi,Andrew Prime,Zsolt Vasvari
+// license:BSD-3-Clause
+// copyright-holders:Bryan McPhail,Ernesto Corvi,Andrew Prime,Zsolt Vasvari
+// thanks-to:Fuzz
 
 /***************************************************************************
 
diff --git a/src/mame/video/8080bw.cpp b/src/mame/video/8080bw.cpp
index 2e51570d156..9300c329031 100644
--- a/src/mame/video/8080bw.cpp
+++ b/src/mame/video/8080bw.cpp
@@ -1,5 +1,6 @@
-// license:???
-// copyright-holders:Michael Strutts,Nicola Salmoria,Tormod Tjaberg,Mirko Buffoni,Lee Taylor,Valerio Verrando,Marco Cassili,Zsolt Vasvari,Aaron Giles,Jonathan Gevaryahu,hap,Robbbert
+// license:BSD-3-Clause
+// copyright-holders:Nicola Salmoria, Tormod Tjaberg, Mirko Buffoni,Lee Taylor, Valerio Verrando, Zsolt Vasvari,Aaron Giles,Jonathan Gevaryahu,hap,Robbbert
+// thanks-to:Michael Strutts, Marco Cassili
 /***************************************************************************
 
   video.c
diff --git a/src/mame/video/midtunit.cpp b/src/mame/video/midtunit.cpp
index 8495d9fd5b3..4b091991125 100644
--- a/src/mame/video/midtunit.cpp
+++ b/src/mame/video/midtunit.cpp
@@ -1,5 +1,6 @@
-// license:???
-// copyright-holders:Alex Pasadyn, Zsolt Vasvari, Kurt Mahan, Ernesto Corvi, Aaron Giles
+// license:BSD-3-Clause
+// copyright-holders:Alex Pasadyn, Zsolt Vasvari, Ernesto Corvi, Aaron Giles
+// thanks-to:Kurt Mahan
 /*************************************************************************
 
     Driver for Midway T-unit games.
diff --git a/src/mame/video/midyunit.cpp b/src/mame/video/midyunit.cpp
index 5190df267ca..eab824b3418 100644
--- a/src/mame/video/midyunit.cpp
+++ b/src/mame/video/midyunit.cpp
@@ -1,5 +1,6 @@
-// license:???
-// copyright-holders:Alex Pasadyn, Zsolt Vasvari, Kurt Mahan, Ernesto Corvi, Aaron Giles
+// license:BSD-3-Clause
+// copyright-holders:Alex Pasadyn, Zsolt Vasvari, Ernesto Corvi, Aaron Giles
+// thanks-to:Kurt Mahan
 /*************************************************************************
 
     Williams/Midway Y/Z-unit system
diff --git a/src/mame/video/mw8080bw.cpp b/src/mame/video/mw8080bw.cpp
index 7129ce947fe..d8fe28c8cdb 100644
--- a/src/mame/video/mw8080bw.cpp
+++ b/src/mame/video/mw8080bw.cpp
@@ -1,5 +1,6 @@
-// license:???
-// copyright-holders:Michael Strutts, Nicola Salmoria, Tormod Tjaberg, Mirko Buffoni,Lee Taylor, Valerio Verrando, Marco Cassili, Zsolt Vasvari
+// license:BSD-3-Clause
+// copyright-holders:Nicola Salmoria, Tormod Tjaberg, Mirko Buffoni,Lee Taylor, Valerio Verrando, Zsolt Vasvari
+// thanks-to:Michael Strutts, Marco Cassili
 /***************************************************************************
 
     Midway 8080-based black and white hardware
diff --git a/src/mame/video/neogeo.cpp b/src/mame/video/neogeo.cpp
index 752853d3ab4..1384166a3b3 100644
--- a/src/mame/video/neogeo.cpp
+++ b/src/mame/video/neogeo.cpp
@@ -1,5 +1,6 @@
-// license:???
-// copyright-holders:Bryan McPhail,Fuzz,Ernesto Corvi,Andrew Prime,Zsolt Vasvari
+// license:BSD-3-Clause
+// copyright-holders:Bryan McPhail,Ernesto Corvi,Andrew Prime,Zsolt Vasvari
+// thanks-to:Fuzz
 /***************************************************************************
 
     Neo-Geo hardware
diff --git a/src/mame/video/neogeo_spr.cpp b/src/mame/video/neogeo_spr.cpp
index 8a8089e8f2e..947090e7de7 100644
--- a/src/mame/video/neogeo_spr.cpp
+++ b/src/mame/video/neogeo_spr.cpp
@@ -1,5 +1,6 @@
-// license:???
-// copyright-holders:Bryan McPhail,Fuzz,Ernesto Corvi,Andrew Prime,Zsolt Vasvari
+// license:BSD-3-Clause
+// copyright-holders:Bryan McPhail,Ernesto Corvi,Andrew Prime,Zsolt Vasvari
+// thanks-to:Fuzz
 /* NeoGeo sprites (and fixed text layer) */
 
 #include "emu.h"
diff --git a/src/mame/video/neogeo_spr.h b/src/mame/video/neogeo_spr.h
index e5151bd6f50..b1f08bfd8e4 100644
--- a/src/mame/video/neogeo_spr.h
+++ b/src/mame/video/neogeo_spr.h
@@ -1,6 +1,6 @@
-// license:???
-// copyright-holders:Bryan McPhail,Fuzz,Ernesto Corvi,Andrew Prime,Zsolt Vasvari
-
+// license:BSD-3-Clause
+// copyright-holders:Bryan McPhail,Ernesto Corvi,Andrew Prime,Zsolt Vasvari
+// thanks-to:Fuzz
 #define VERBOSE     (0)
 
 // todo, move these back, currently the sprite code needs some of the values tho
diff --git a/src/mame/video/nmk16.cpp b/src/mame/video/nmk16.cpp
index 4560985cc6a..41fd7cf1e09 100644
--- a/src/mame/video/nmk16.cpp
+++ b/src/mame/video/nmk16.cpp
@@ -1,5 +1,6 @@
-// license:???
-// copyright-holders:Mirko Buffoni,Richard Bush,Nicola Salmoria,Bryan McPhail,David Haywood,R. Belmont,Alex Marshall,Angelo Salese,Luca Elia
+// license:BSD-3-Clause
+// copyright-holders:Mirko Buffoni,Nicola Salmoria,Bryan McPhail,David Haywood,R. Belmont,Alex Marshall,Angelo Salese,Luca Elia
+// thanks-to:Richard Bush
 /* notes...
 
  drawing sprites in a single pass with pdrawgfx breaks Thunder Dragon 2,
diff --git a/src/mame/video/vc4000.cpp b/src/mame/video/vc4000.cpp
index d8ba1ca6f30..15252cba98c 100644
--- a/src/mame/video/vc4000.cpp
+++ b/src/mame/video/vc4000.cpp
@@ -1,6 +1,6 @@
-// license:???
+// license:GPL-2.0+
 // copyright-holders:Peter Trauner, Manfred Schneider, Robbbert
-
+// thanks-to:Manfred Schneider
 #include "includes/vc4000.h"