diff --git a/src/mame/drivers/segas16b.cpp b/src/mame/drivers/segas16b.cpp
index 63d6997cc42..b62a4f1ebe4 100644
--- a/src/mame/drivers/segas16b.cpp
+++ b/src/mame/drivers/segas16b.cpp
@@ -5230,6 +5230,7 @@ ROM_END
 //  Aurail, Sega System 16B
 //  CPU: FD1089A (317-0167)
 //  ROM Board type: 171-5704
+//  Sega ID# for ROM board: 834-7702
 //
 //  S1  - -
 //  S2  ---
@@ -5395,6 +5396,7 @@ ROM_END
 //  Bay Route, Sega System 16B
 //  CPU: FD1094 (317-0115)
 //  ROM Board type: 171-5704
+//  Sega ID# for ROM board: 834-7014-03
 //
 ROM_START( bayroutej )
 	ROM_REGION( 0x80000, "maincpu", 0 ) // 68000 code
@@ -5740,7 +5742,8 @@ ROM_END
 //  Cotton (Japan), Sega System 16B
 //  CPU: FD1094 (317-0179B)
 //  ROM Board type: 171-5704
-//  Sega ID# for ROM board: 834-8022-04
+//  Sega game ID: 833-8021-04 COTTON
+//     ROM board: 834-8022-04
 //
 ROM_START( cottonj )
 	ROM_REGION( 0x80000, "maincpu", 0 ) // 68000 code
@@ -5825,7 +5828,8 @@ ROM_END
 //  Cotton (Japan), Sega System 16B
 //  CPU: FD1094 (317-0179A)
 //  ROM Board type: 171-5704
-//  Sega ID# for ROM board: 834-8022-04
+//  Sega game ID: 833-8021-04 COTTON
+//     ROM board: 834-8022-04
 //
 
 ROM_START( cottonja )
diff --git a/src/mame/drivers/segas18.cpp b/src/mame/drivers/segas18.cpp
index 111256c5eb1..fdd6fd95773 100644
--- a/src/mame/drivers/segas18.cpp
+++ b/src/mame/drivers/segas18.cpp
@@ -2683,6 +2683,9 @@ ROM_END
     Moonwalker, Sega System 18
     CPU: FD1094 (317-0159)
     ROM Board: 171-5873B
+   Main board: 837-7530-02
+      Game BD: 833-7528-02 MOONWALKER
+    ROM Board: 834-7529-02
 */
 ROM_START( mwalk )
 	ROM_REGION( 0x80000, "maincpu", 0 ) // 68000 code - custom cpu 317-0159
diff --git a/src/mame/drivers/segas32.cpp b/src/mame/drivers/segas32.cpp
index e2b99336ef1..fc46d67b8dc 100644
--- a/src/mame/drivers/segas32.cpp
+++ b/src/mame/drivers/segas32.cpp
@@ -3574,6 +3574,11 @@ ROM_END
 /**************************************************************************************************************************
     Dark Edge (Japan)
     protected via FD1149 317-0204
+
+    Sega Game ID codes:
+       Game BD: 833-9230 DARK EDGE
+    ROM PCB No: 834-9231
+     A/D BD NO. 837-7968
 */
 ROM_START( darkedgej )
 	ROM_REGION( 0x200000, "mainpcb:maincpu", 0 ) /* v60 code + data */