diff --git a/src/mame/drivers/fidel_cc7.cpp b/src/mame/drivers/fidel_cc7.cpp
index f872eba2333..2c802e9df52 100644
--- a/src/mame/drivers/fidel_cc7.cpp
+++ b/src/mame/drivers/fidel_cc7.cpp
@@ -15,6 +15,9 @@ This is a cost-reduced design from CC10, no special I/O chips.
 Backgammon Challenger (BKC) is the same PCB, with the speaker connection going
 to the display panel instead.
 
+CC7 (BCC) was also bootlegged around 1981 by Splice Industria Brasileira,
+as "Byte XD-300". Mostek MK3880N-4 @ 4MHz, ROM contents is same as BCC REVB.
+
 RE information from netlist by Berger (a BCC model)
 
 Memory map:
diff --git a/src/mame/drivers/saitek_stratos.cpp b/src/mame/drivers/saitek_stratos.cpp
index 3c7912a30f7..36ca484c49d 100644
--- a/src/mame/drivers/saitek_stratos.cpp
+++ b/src/mame/drivers/saitek_stratos.cpp
@@ -541,33 +541,33 @@ void stratos_state::tking2(machine_config &config)
 
 ROM_START( stratos )
 	ROM_REGION( 0x10000, "maincpu", 0 )
-	ROM_LOAD("w1y01f_728m_u3.u3", 0x0000, 0x8000, CRC(b58a7256) SHA1(75b3a3a65f4ca8d52aa5b17a06319bff59d9014f) )
+	ROM_LOAD("w1yo1f_728m_u3.u3", 0x0000, 0x8000, CRC(b58a7256) SHA1(75b3a3a65f4ca8d52aa5b17a06319bff59d9014f) )
 	ROM_LOAD("bw1_819n_u4.u4", 0x8000, 0x8000, CRC(cb0de631) SHA1(f78d40213be21775966cbc832d64acd9b73de632) )
 ROM_END
 
 ROM_START( stratosa )
 	ROM_REGION( 0x10000, "maincpu", 0 )
-	ROM_LOAD("w1y01f_728l_u3.u3", 0x0000, 0x8000, CRC(19a22058) SHA1(a5ca54d870c70b7ce9c7be2951800bf49cc57527) )
+	ROM_LOAD("w1yo1f_728l_u3.u3", 0x0000, 0x8000, CRC(19a22058) SHA1(a5ca54d870c70b7ce9c7be2951800bf49cc57527) )
 	ROM_LOAD("bw1_819n_u4.u4", 0x8000, 0x8000, CRC(cb0de631) SHA1(f78d40213be21775966cbc832d64acd9b73de632) )
 ROM_END
 
 
 ROM_START( tking ) // PCB rev. 10
 	ROM_REGION( 0x10000, "maincpu", 0 )
-	ROM_LOAD("y01f_713d_u3.u3", 0x0000, 0x8000, CRC(b8c6d853) SHA1(98923f44bbbd2ea17c269850971d3df229e6057e) )
-	ROM_LOAD("y01f_712a_u4.u4", 0x8000, 0x8000, CRC(7d3f8f7b) SHA1(8be5d8d988ff0577ccfec0a773bfd94599f2534f) )
+	ROM_LOAD("yo1f_713d_u3.u3", 0x0000, 0x8000, CRC(b8c6d853) SHA1(98923f44bbbd2ea17c269850971d3df229e6057e) )
+	ROM_LOAD("yo1f_712a_u4.u4", 0x8000, 0x8000, CRC(7d3f8f7b) SHA1(8be5d8d988ff0577ccfec0a773bfd94599f2534f) )
 ROM_END
 
 ROM_START( tkinga ) // PCB rev. 3, also PCB rev. 5
 	ROM_REGION( 0x10000, "maincpu", 0 )
-	ROM_LOAD("w1y01f_728l_u3.u3", 0x0000, 0x8000, CRC(19a22058) SHA1(a5ca54d870c70b7ce9c7be2951800bf49cc57527) )
-	ROM_LOAD("y01f-b_819o_u4.u4", 0x8000, 0x8000, CRC(336040d4) SHA1(aca662b8cc4d6bafd61ca158c768ba8896117169) )
+	ROM_LOAD("w1yo1f_728l_u3.u3", 0x0000, 0x8000, CRC(19a22058) SHA1(a5ca54d870c70b7ce9c7be2951800bf49cc57527) )
+	ROM_LOAD("yo1f-b_819o_u4.u4", 0x8000, 0x8000, CRC(336040d4) SHA1(aca662b8cc4d6bafd61ca158c768ba8896117169) )
 ROM_END
 
 ROM_START( tkingb ) // PCB rev. 7
 	ROM_REGION( 0x10000, "maincpu", 0 )
-	ROM_LOAD("w1y01f_728p_u3.u3", 0x0000, 0x8000, CRC(ad77f83e) SHA1(598fdb1e40267d9d43a3d8f287723070b9afa349) )
-	ROM_LOAD("y01f-b_819o_u4.u4", 0x8000, 0x8000, CRC(336040d4) SHA1(aca662b8cc4d6bafd61ca158c768ba8896117169) )
+	ROM_LOAD("w1yo1f_728p_u3.u3", 0x0000, 0x8000, CRC(ad77f83e) SHA1(598fdb1e40267d9d43a3d8f287723070b9afa349) )
+	ROM_LOAD("yo1f-b_819o_u4.u4", 0x8000, 0x8000, CRC(336040d4) SHA1(aca662b8cc4d6bafd61ca158c768ba8896117169) )
 ROM_END
 
 
diff --git a/src/mame/layout/coco3.lay b/src/mame/layout/coco3.lay
index 0a4205d8cdd..46a6bd2137a 100644
--- a/src/mame/layout/coco3.lay
+++ b/src/mame/layout/coco3.lay
@@ -1,12 +1,12 @@
 <?xml version="1.0"?>
 <mamelayout version="2">
 	<view name="Composite">
+		<!-- workaround for MAME selecting a 2-screen view by default -->
+		<screen index="1"><bounds left="0" top="0" right="4" bottom="3" /><color alpha="0" /></screen>
+
 		<screen index="0">
 			<bounds left="0" top="0" right="4" bottom="3" />
 		</screen>
-
-		<!-- workaround for MAME selecting a 2-screen view by default -->
-		<screen index="1"><bounds left="0" top="0" right="4" bottom="3" /><color alpha="0" /></screen>
 	</view>
 
 	<view name="RGB">
diff --git a/src/mame/layout/sms1.lay b/src/mame/layout/sms1.lay
index b390da57e59..f7524f52640 100644
--- a/src/mame/layout/sms1.lay
+++ b/src/mame/layout/sms1.lay
@@ -1,13 +1,13 @@
 <?xml version="1.0"?>
 <mamelayout version="2">
 	<view name="Main Screen Standard (4:3)">
-		<screen index="0">
-			<bounds left="0" top="0" right="4" bottom="3" />
-		</screen>
-
 		<!-- workaround for MAME selecting a 3-screen view by default -->
 		<screen index="1"><bounds left="0" top="0" right="4" bottom="3" /><color alpha="0" /></screen>
 		<screen index="2"><bounds left="0" top="0" right="4" bottom="3" /><color alpha="0" /></screen>
+
+		<screen index="0">
+			<bounds left="0" top="0" right="4" bottom="3" />
+		</screen>
 	</view>
 
 	<view name="SegaScope Left LCD Standard (4:3)">