diff --git a/src/emu/cpu/e132xs/32xsdasm.c b/src/emu/cpu/e132xs/32xsdasm.c
index 76eb3953092..f5e9885b220 100644
--- a/src/emu/cpu/e132xs/32xsdasm.c
+++ b/src/emu/cpu/e132xs/32xsdasm.c
@@ -1,5 +1,5 @@
-// license:???
-// copyright-holders:???
+// license:BSD-3-Clause
+// copyright-holders:Pierpaolo Prazzoli
 /*
 
  Hyperstone disassembler
diff --git a/src/emu/cpu/e132xs/e132xs.c b/src/emu/cpu/e132xs/e132xs.c
index b60653a8cfc..fb156aae200 100644
--- a/src/emu/cpu/e132xs/e132xs.c
+++ b/src/emu/cpu/e132xs/e132xs.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Pierpaolo Prazzoli
 /********************************************************************
  Hyperstone cpu emulator
diff --git a/src/emu/cpu/ssp1601/ssp1601d.c b/src/emu/cpu/ssp1601/ssp1601d.c
index 8c8fddb9305..c147cbd8534 100644
--- a/src/emu/cpu/ssp1601/ssp1601d.c
+++ b/src/emu/cpu/ssp1601/ssp1601d.c
@@ -1,5 +1,5 @@
-// license:???
-// copyright-holders:???
+// license:BSD-3-Clause
+// copyright-holders:Pierpaolo Prazzoli
 /*
 
  SSP1601 disassembler
diff --git a/src/mame/drivers/alpha68k.c b/src/mame/drivers/alpha68k.c
index 6588b155af5..344544a5e86 100644
--- a/src/mame/drivers/alpha68k.c
+++ b/src/mame/drivers/alpha68k.c
@@ -1,5 +1,5 @@
-// license:???
-// copyright-holders:???
+// license:BSD-3-Clause
+// copyright-holders:Pierpaolo Prazzoli
 /***************************************************************************
 
     SNK/Alpha 68000 based games:
diff --git a/src/mame/drivers/champbwl.c b/src/mame/drivers/champbwl.c
index f1575834ac4..6fb8799de32 100644
--- a/src/mame/drivers/champbwl.c
+++ b/src/mame/drivers/champbwl.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Pierpaolo Prazzoli
 /*
 
diff --git a/src/mame/drivers/coinmstr.c b/src/mame/drivers/coinmstr.c
index 9dfe0f3c13d..fb702bda809 100644
--- a/src/mame/drivers/coinmstr.c
+++ b/src/mame/drivers/coinmstr.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Pierpaolo Prazzoli, Roberto Fresca
 /*==================================================================================
 
diff --git a/src/mame/drivers/crospang.c b/src/mame/drivers/crospang.c
index 959e9992248..b275e1602b7 100644
--- a/src/mame/drivers/crospang.c
+++ b/src/mame/drivers/crospang.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Pierpaolo Prazzoli, David Haywood
 /*
 
diff --git a/src/mame/drivers/cultures.c b/src/mame/drivers/cultures.c
index a19ff4eb59b..a555d365147 100644
--- a/src/mame/drivers/cultures.c
+++ b/src/mame/drivers/cultures.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Pierpaolo Prazzoli
 /*
     Jibun wo Migaku Culture School Mahjong Hen
diff --git a/src/mame/drivers/dacholer.c b/src/mame/drivers/dacholer.c
index 3ec8d71f855..ec9fcc83a51 100644
--- a/src/mame/drivers/dacholer.c
+++ b/src/mame/drivers/dacholer.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Pierpaolo Prazzoli
 /******************************************************************************
 
diff --git a/src/mame/drivers/ddayjlc.c b/src/mame/drivers/ddayjlc.c
index f9a315484b1..839e346c9b6 100644
--- a/src/mame/drivers/ddayjlc.c
+++ b/src/mame/drivers/ddayjlc.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Pierpaolo Prazzoli, Tomasz Slanina
 /*
 
diff --git a/src/mame/drivers/dgpix.c b/src/mame/drivers/dgpix.c
index 6886c136e3c..06602a80e8d 100644
--- a/src/mame/drivers/dgpix.c
+++ b/src/mame/drivers/dgpix.c
@@ -1,5 +1,5 @@
-// license:???
-// copyright-holders:Pierpaolo Prazzoli, Tomasz Slanina
+// license:BSD-3-Clause
+// copyright-holders:Pierpaolo PrazzoliPierpaolo Prazzoli, Tomasz Slanina
 /********************************************************************
 
  dgPIX VRender0 hardware
diff --git a/src/mame/drivers/enigma2.c b/src/mame/drivers/enigma2.c
index 6624b1d9d26..78e1d9c854e 100644
--- a/src/mame/drivers/enigma2.c
+++ b/src/mame/drivers/enigma2.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Pierpaolo Prazzoli, Tomasz Slanina
 /********************************************************************
 
diff --git a/src/mame/drivers/eolith16.c b/src/mame/drivers/eolith16.c
index 309de38edbe..317f3eb7aad 100644
--- a/src/mame/drivers/eolith16.c
+++ b/src/mame/drivers/eolith16.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Pierpaolo Prazzoli
 /********************************************************************
 
diff --git a/src/mame/drivers/ettrivia.c b/src/mame/drivers/ettrivia.c
index f9e5e691339..24a0ff81157 100644
--- a/src/mame/drivers/ettrivia.c
+++ b/src/mame/drivers/ettrivia.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Pierpaolo Prazzoli
 /*
 
diff --git a/src/mame/drivers/f-32.c b/src/mame/drivers/f-32.c
index 5d092ec3ade..f571a09457d 100644
--- a/src/mame/drivers/f-32.c
+++ b/src/mame/drivers/f-32.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Pierpaolo Prazzoli
 /********************************************************************
 
diff --git a/src/mame/drivers/gng.c b/src/mame/drivers/gng.c
index 39dbdccc562..6876f23ec63 100644
--- a/src/mame/drivers/gng.c
+++ b/src/mame/drivers/gng.c
@@ -1,5 +1,5 @@
-// license:???
-// copyright-holders:???
+// license:BSD-3-Clause
+// copyright-holders:Pierpaolo Prazzoli
 /***************************************************************************
 
 Ghosts'n Goblins
diff --git a/src/mame/drivers/goal92.c b/src/mame/drivers/goal92.c
index faffea4416b..600b527f700 100644
--- a/src/mame/drivers/goal92.c
+++ b/src/mame/drivers/goal92.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Pierpaolo Prazzoli, David Haywood
 /***************************************************************************
 
diff --git a/src/mame/drivers/igs017.c b/src/mame/drivers/igs017.c
index ba593604d88..2a76f9ecc59 100644
--- a/src/mame/drivers/igs017.c
+++ b/src/mame/drivers/igs017.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Pierpaolo Prazzoli, Luca Elia
 /************************************************************************************************************
 
diff --git a/src/mame/drivers/jollyjgr.c b/src/mame/drivers/jollyjgr.c
index a78eda4cee1..284964a71f1 100644
--- a/src/mame/drivers/jollyjgr.c
+++ b/src/mame/drivers/jollyjgr.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Pierpaolo Prazzoli
 /*
 
diff --git a/src/mame/drivers/laserbat.c b/src/mame/drivers/laserbat.c
index 863f785d0b2..2dfaf6c6b75 100644
--- a/src/mame/drivers/laserbat.c
+++ b/src/mame/drivers/laserbat.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Pierpaolo Prazzoli
 /*
 
diff --git a/src/mame/drivers/limenko.c b/src/mame/drivers/limenko.c
index c228a1cd1b7..8bbfc5f59df 100644
--- a/src/mame/drivers/limenko.c
+++ b/src/mame/drivers/limenko.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Pierpaolo Prazzoli, Tomasz Slanina
 /*
 
diff --git a/src/mame/drivers/littlerb.c b/src/mame/drivers/littlerb.c
index ec210d8aa8e..d018c4d8b98 100644
--- a/src/mame/drivers/littlerb.c
+++ b/src/mame/drivers/littlerb.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Pierpaolo Prazzoli, David Haywood
 /* Little Robin */
 
diff --git a/src/mame/drivers/magic10.c b/src/mame/drivers/magic10.c
index 554c9c1b091..c8895bc04d1 100644
--- a/src/mame/drivers/magic10.c
+++ b/src/mame/drivers/magic10.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Pierpaolo Prazzoli, Roberto Fresca
 /****************************************************************************
 
diff --git a/src/mame/drivers/merit.c b/src/mame/drivers/merit.c
index 82687f0f5b4..fb728ba9414 100644
--- a/src/mame/drivers/merit.c
+++ b/src/mame/drivers/merit.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Pierpaolo Prazzoli
 /*
 
diff --git a/src/mame/drivers/mwarr.c b/src/mame/drivers/mwarr.c
index 62196467d1f..5da08157aa8 100644
--- a/src/mame/drivers/mwarr.c
+++ b/src/mame/drivers/mwarr.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Pierpaolo Prazzoli
 /*
 
diff --git a/src/mame/drivers/nmg5.c b/src/mame/drivers/nmg5.c
index 04ca73e3199..b17b41dc031 100644
--- a/src/mame/drivers/nmg5.c
+++ b/src/mame/drivers/nmg5.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Pierpaolo Prazzoli
 /*
 
diff --git a/src/mame/drivers/pasha2.c b/src/mame/drivers/pasha2.c
index 7d40f68bea6..fa41ba6a6fa 100644
--- a/src/mame/drivers/pasha2.c
+++ b/src/mame/drivers/pasha2.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Pierpaolo Prazzoli
 /********************************************************************
 
diff --git a/src/mame/drivers/portrait.c b/src/mame/drivers/portrait.c
index 24bb950847e..7134d0f8942 100644
--- a/src/mame/drivers/portrait.c
+++ b/src/mame/drivers/portrait.c
@@ -1,5 +1,5 @@
 // license:???
-// copyright-holders:Steve Ellenoff, Peo
+// copyright-holders:Steve Ellenoff, Pierpaolo Prazzoli
 /**************************************************************************
  Portraits
  (c) 1983 Olympia
diff --git a/src/mame/drivers/sslam.c b/src/mame/drivers/sslam.c
index 46e32f47dfb..2ce73c8d0ad 100644
--- a/src/mame/drivers/sslam.c
+++ b/src/mame/drivers/sslam.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Pierpaolo Prazzoli
 /* Super Slam (c)1993 Playmark */
 
diff --git a/src/mame/drivers/trvmadns.c b/src/mame/drivers/trvmadns.c
index 217236c7b70..8674fe38d15 100644
--- a/src/mame/drivers/trvmadns.c
+++ b/src/mame/drivers/trvmadns.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Pierpaolo Prazzoli
 /*
 
diff --git a/src/mame/drivers/trvquest.c b/src/mame/drivers/trvquest.c
index caeb9675816..5111de276c6 100644
--- a/src/mame/drivers/trvquest.c
+++ b/src/mame/drivers/trvquest.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Pierpaolo Prazzoli
 /*
 
diff --git a/src/mame/drivers/tryout.c b/src/mame/drivers/tryout.c
index 7f0fcb2c38b..de23836e2b2 100644
--- a/src/mame/drivers/tryout.c
+++ b/src/mame/drivers/tryout.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Pierpaolo Prazzoli, Bryan McPhail
 /***************************************************************
 
diff --git a/src/mame/drivers/vegaeo.c b/src/mame/drivers/vegaeo.c
index c93f3932473..5501ac77de3 100644
--- a/src/mame/drivers/vegaeo.c
+++ b/src/mame/drivers/vegaeo.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Pierpaolo Prazzoli
 /********************************************************************
  Eolith 32 bits hardware: Vega system
diff --git a/src/mame/drivers/vsnes.c b/src/mame/drivers/vsnes.c
index 4a91a8eec09..dd753b6841b 100644
--- a/src/mame/drivers/vsnes.c
+++ b/src/mame/drivers/vsnes.c
@@ -1,5 +1,5 @@
-// license:???
-// copyright-holders:Pierpaolo Prazzoli, 
+// license:BSD-3-Clause
+// copyright-holders:Pierpaolo Prazzoli
 /***************************************************************************
 
 Nintendo VS UniSystem and DualSystem - (c) 1984 Nintendo of America
diff --git a/src/mame/drivers/wink.c b/src/mame/drivers/wink.c
index a637bc2de7d..5ea6749506f 100644
--- a/src/mame/drivers/wink.c
+++ b/src/mame/drivers/wink.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:HIGHWAYMAN, Nicola Salmoria, Pierpaolo Prazzoli
 /*
     Wink    -   (c) 1985 Midcoin
diff --git a/src/mame/machine/irem_cpu.c b/src/mame/machine/irem_cpu.c
index 13fef15e11c..2eeb19b9f73 100644
--- a/src/mame/machine/irem_cpu.c
+++ b/src/mame/machine/irem_cpu.c
@@ -1,5 +1,5 @@
-// license:???
-// copyright-holders:???
+// license:BSD-3-Clause
+// copyright-holders:Bryan McPhail
 
 /*****************************************************************************