diff --git a/src/emu/machine/rtc9701.c b/src/emu/machine/rtc9701.c
index f98665eaa74..8a590a07c72 100644
--- a/src/emu/machine/rtc9701.c
+++ b/src/emu/machine/rtc9701.c
@@ -1,3 +1,5 @@
+// license:MAME
+// copyright-holders:Angelo Salese, David Haywood
 /***************************************************************************
 
     rtc9701.c
diff --git a/src/emu/video/h63484.c b/src/emu/video/h63484.c
index bacfec41437..c3714499813 100644
--- a/src/emu/video/h63484.c
+++ b/src/emu/video/h63484.c
@@ -1,3 +1,5 @@
+// license:?
+// copyright-holders:Angelo Salese
 /***************************************************************************
 
     HD63484 ACRTC (rewrite in progress)
diff --git a/src/emu/video/upd7220.c b/src/emu/video/upd7220.c
index 41b780c1fe3..03c42c2a6fa 100644
--- a/src/emu/video/upd7220.c
+++ b/src/emu/video/upd7220.c
@@ -1,3 +1,5 @@
+// license:?
+// copyright-holders:Angelo Salese, Miodrag Milanovic
 /**********************************************************************
 
     Intel 82720 Graphics Display Controller emulation
diff --git a/src/mess/drivers/a5105.c b/src/mess/drivers/a5105.c
index 554b8309346..b78f31f133a 100644
--- a/src/mess/drivers/a5105.c
+++ b/src/mess/drivers/a5105.c
@@ -1,3 +1,5 @@
+// license:MAME
+// copyright-holders:Angelo Salese, Robbbert
 /***************************************************************************
 
     A5105
diff --git a/src/mess/drivers/pce.c b/src/mess/drivers/pce.c
index 231334672c0..89d7dc190ba 100644
--- a/src/mess/drivers/pce.c
+++ b/src/mess/drivers/pce.c
@@ -1,3 +1,5 @@
+// license:?
+// copyright-holders:Charles Mac Donald, Wilbert Pol, Angelo Salese
 /****************************************************************************
 
  PC-Engine / Turbo Grafx 16 driver
diff --git a/src/mess/drivers/x1twin.c b/src/mess/drivers/x1twin.c
index 08d80ea3c63..1a4306a123e 100644
--- a/src/mess/drivers/x1twin.c
+++ b/src/mess/drivers/x1twin.c
@@ -1,3 +1,5 @@
+// license:MAME
+// copyright-holders:Angelo Salese
 /************************************************************************************************
 
     Sharp X1Twin = Sharp X1 + NEC PC Engine All-in-One