diff --git a/src/mame/drivers/model2.cpp b/src/mame/drivers/model2.cpp
index caa20f2a83c..0ce444d2fa1 100644
--- a/src/mame/drivers/model2.cpp
+++ b/src/mame/drivers/model2.cpp
@@ -3935,7 +3935,7 @@ ROM_START( motoraiddx ) /* Motor Raid DX, Model 2A, Sega ROM board ID# 834-13231
 	MODEL2A_VID_BOARD
 ROM_END
 
-ROM_START( skytargt ) /* Sky Target, Model 2A */
+ROM_START( skytargt ) /* Sky Target, Model 2A, Sega game ID# 833-12178 , Sega ROM board ID# 834-12179 */
 	ROM_REGION( 0x200000, "maincpu", 0 ) // i960 program
 	ROM_LOAD32_WORD( "epr-18406.12", 0x000000, 0x080000, CRC(fde9c00a) SHA1(01cd519daaf6138d9df4940bf8bb5923a1f163df) )
 	ROM_LOAD32_WORD( "epr-18407.13", 0x000002, 0x080000, CRC(35f8b529) SHA1(faf6dcf8f345c1e7968823f2dba60afcd88f37c2) )
diff --git a/src/mame/drivers/model3.cpp b/src/mame/drivers/model3.cpp
index 48437a84497..0b0b0cdae62 100644
--- a/src/mame/drivers/model3.cpp
+++ b/src/mame/drivers/model3.cpp
@@ -3612,7 +3612,7 @@ ROM_START( vs2v991 )    /* Step 2.0 */
 	ROM_PARAMETER( ":315_5881:key", "29222ac8" )
 ROM_END
 
-ROM_START( vs299b ) /* Step 2.0, Sega game ID# is 833-13688, ROM board ID# 834-13689 VS2 VER99 STEP2 */
+ROM_START( vs299b ) /* Step 2.0, Sega game ID# is 833-13688, ROM board ID# 834-13689 VS2 VER99 STEP2, 337-13690-COM security board  */
 	ROM_REGION64_BE( 0x8800000, "user1", 0 ) /* program + data ROMs */
 	// CROM
 	ROM_LOAD64_WORD_SWAP( "epr-21550b.17",  0x400006, 0x100000, CRC(c508e488) SHA1(3134d418beaee9f824a0bd0e5441a997b5911d16) )
@@ -3684,7 +3684,7 @@ ROM_START( vs299b ) /* Step 2.0, Sega game ID# is 833-13688, ROM board ID# 834-1
 	ROM_PARAMETER( ":315_5881:key", "29222ac8" )
 ROM_END
 
-ROM_START( vs299a ) /* Step 2.0 */
+ROM_START( vs299a ) /* Step 2.0, Sega game ID# is 833-13688, ROM board ID# 834-13689 VS2 VER99 STEP2, 337-13690-COM security board  */
 	ROM_REGION64_BE( 0x8800000, "user1", 0 ) /* program + data ROMs */
 	// CROM
 	ROM_LOAD64_WORD_SWAP( "epr-21535a.17",  0x400006, 0x100000, CRC(8e4ec341) SHA1(973c71e7a48e728cbcb2465b56e90669fee0ec53) )