diff --git a/src/mame/handheld/hh_sm510.cpp b/src/mame/handheld/hh_sm510.cpp
index f1f842a68f3..35bac526e13 100644
--- a/src/mame/handheld/hh_sm510.cpp
+++ b/src/mame/handheld/hh_sm510.cpp
@@ -4598,10 +4598,10 @@ static INPUT_PORTS_START( naltair )
 	PORT_INCLUDE( gnw_mmouse )
 
 	PORT_MODIFY("IN.0") // R2
-	PORT_BIT( 0x0f, 0x00, IPT_DIAL) PORT_NAME("Dosimeter Reading") PORT_SENSITIVITY(10) PORT_KEYDELTA(1)
+	PORT_BIT( 0x0f, 0x00, IPT_DIAL ) PORT_CHANGED_CB(input_changed) PORT_SENSITIVITY(10) PORT_KEYDELTA(2) PORT_CODE_DEC(INPUT_CODE_INVALID) PORT_NAME("Dosimeter Reading")
 
 	PORT_MODIFY("IN.1") // R3
-	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_JOYSTICKRIGHT_UP ) PORT_CHANGED_CB(input_changed) PORT_16WAY PORT_NAME("Right Up / Dosimeter Mode")
+	PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_JOYSTICKRIGHT_UP ) PORT_CHANGED_CB(input_changed) PORT_16WAY PORT_NAME("P1 Right Stick/Up / Dosimeter Mode")
 INPUT_PORTS_END
 
 // config
diff --git a/src/mame/saitek/turbo16k.cpp b/src/mame/saitek/turbo16k.cpp
index 0879161c8d6..045a88d0548 100644
--- a/src/mame/saitek/turbo16k.cpp
+++ b/src/mame/saitek/turbo16k.cpp
@@ -13,6 +13,7 @@ NVRAM won't save properly.
 
 TODO:
 - dump/add other MCU revisions, SX8 for tmate/conquist is known to exist
+- verify if QFP SX5A has the same ROM contents as DIP SX5A
 - SX4A and SX5A read from port 2 bits 3 and 7 while DDR is 0xff, why does it work?
   I added a simple workaround for it in p2_w
 - what is t1850's official title? "1850 Deluxe Table Chess" is from the back of
diff --git a/src/mame/tryom/chess.cpp b/src/mame/tryom/chess.cpp
index fd9fc209402..87d05b0e010 100644
--- a/src/mame/tryom/chess.cpp
+++ b/src/mame/tryom/chess.cpp
@@ -11,7 +11,7 @@ Hardware notes:
 - 256x4 RAM (SCM5101E-8)
 - 9-digit 7seg led panel (3 unused), piezo
 
-The hardware has similarities with Omar.
+The hardware has similarities with Omar I.
 
 The user interface resembles CompuChess. At the "L" prompt, enter level (1-8).
 At "bP", press A for new game, B for empty board, C to continue. At "0", press