diff --git a/src/mame/drivers/fidel_elite.cpp b/src/mame/drivers/fidel_elite.cpp
index 3ff99f9d583..6f840ee4c39 100644
--- a/src/mame/drivers/fidel_elite.cpp
+++ b/src/mame/drivers/fidel_elite.cpp
@@ -180,7 +180,7 @@ void elite_state::machine_reset()
void elite_state::set_cpu_freq()
{
- // known official CPU speeds: 3MHz(EAS/EAS-B?), 3.57MHz(PC/Privat), 4MHz(PC/EAS-C)
+ // known official CPU speeds: 3MHz(EAS/EWC?), 3.57MHz(PC/Privat), 4MHz(PC/EAS-C)
u8 inp = ioport("FAKE")->read();
m_maincpu->set_unscaled_clock((inp & 2) ? 4_MHz_XTAL : ((inp & 1) ? 3.579545_MHz_XTAL : 3_MHz_XTAL));
div_refresh();
diff --git a/src/mame/drivers/fidel_sc9.cpp b/src/mame/drivers/fidel_sc9.cpp
index 0500828e437..21188956e39 100644
--- a/src/mame/drivers/fidel_sc9.cpp
+++ b/src/mame/drivers/fidel_sc9.cpp
@@ -26,7 +26,8 @@ Known modules (*denotes undumped):
- CB9: Challenger Book Openings 1 - 8KB (label not known)
- CB16: Challenger Book Openings 2 - 8+8KB 101-1042A01,02
- *CG64: 64 Greatest Games
-- *EOA-EOE: Challenger Book Openings - Chess Encyclopedia A-E (5 modules)
+- *EOA-EOE: Challenger Book Openings: Chess Encyclopedia Volume A-E (5 modules)
+- *TDF: Challenger Book Openings: Tarrasch Defense to the Queen's Gambit
The edge connector has D0-D7, A0-A13, 2 chip select lines, read/write lines, IRQ line.
IRQ and write strobe are unused. Maximum known size is 16KB.
diff --git a/src/mame/drivers/mephisto_montec.cpp b/src/mame/drivers/mephisto_montec.cpp
index ec157db1d80..56a1a030a0f 100644
--- a/src/mame/drivers/mephisto_montec.cpp
+++ b/src/mame/drivers/mephisto_montec.cpp
@@ -485,4 +485,4 @@ CONS( 1988, smondial2, 0, 0, smondial2, smondial2, mephisto_montec_
CONS( 1987, montec, 0, 0, montec, montec, mephisto_montec_state, empty_init, "Hegener + Glaser", "Mephisto Monte Carlo (ver. MC3)", MACHINE_SUPPORTS_SAVE | MACHINE_CLICKABLE_ARTWORK )
CONS( 1987, monteca, montec, 0, montec, montec, mephisto_montec_state, empty_init, "Hegener + Glaser", "Mephisto Monte Carlo (ver. MC2)", MACHINE_SUPPORTS_SAVE | MACHINE_CLICKABLE_ARTWORK )
-CONS( 1990, monteciv, montec, 0, monteciv, montec, mephisto_montec_state, empty_init, "Hegener + Glaser", "Mephisto Monte Carlo IV - Limited Edition", MACHINE_SUPPORTS_SAVE | MACHINE_CLICKABLE_ARTWORK )
+CONS( 1990, monteciv, 0, 0, monteciv, montec, mephisto_montec_state, empty_init, "Hegener + Glaser", "Mephisto Monte Carlo IV - Limited Edition", MACHINE_SUPPORTS_SAVE | MACHINE_CLICKABLE_ARTWORK )
diff --git a/src/mame/layout/novag_supercon.lay b/src/mame/layout/novag_supercon.lay
index 5c809d15c4a..19fbd0d24b2 100644
--- a/src/mame/layout/novag_supercon.lay
+++ b/src/mame/layout/novag_supercon.lay
@@ -10,6 +10,7 @@ license:CC0
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