diff --git a/src/mame/drivers/cps1.cpp b/src/mame/drivers/cps1.cpp
index e1034118975..e47eb632fec 100644
--- a/src/mame/drivers/cps1.cpp
+++ b/src/mame/drivers/cps1.cpp
@@ -5525,8 +5525,8 @@ ROM_START( 1941j )
 	ROM_LOAD( "sou1",         0x0000, 0x0117, CRC(84f4b2fe) SHA1(dcc9e86cc36316fe42eace02d6df75d08bc8bb6d) )
 
 	ROM_REGION( 0x0200, "bboardplds", 0 )
-	ROM_LOAD( "yi22b.1a",     0x0000, 0x0117, NO_DUMP )
-	ROM_LOAD( "lwio.12e",     0x0000, 0x0117, CRC(ad52b90c) SHA1(f0fd6aeea515ee449320fe15684e6b3ab7f97bf4) )    // pal verification required
+	ROM_LOAD( "yi22b.1a",     0x0000, 0x0117, CRC(b5cad2a0) SHA1(3b1232cf821617bc9819fa7b9b3f4e7fc66976f3) )
+	ROM_LOAD( "lwio.12e",     0x0000, 0x0117, CRC(ad52b90c) SHA1(f0fd6aeea515ee449320fe15684e6b3ab7f97bf4) )
 ROM_END
 
 /* B-Board 89624B-3 */
diff --git a/src/mame/video/cps1.cpp b/src/mame/video/cps1.cpp
index 532360636d6..3a78c77d156 100644
--- a/src/mame/video/cps1.cpp
+++ b/src/mame/video/cps1.cpp
@@ -71,7 +71,7 @@ Final Fight (Japan 900613)                                         89625B-1   S2
 1941: Counter Attack (World)                                 1990  89624B-3   YI24B            IOB1  88622-C-5    CPS-B-05  DL-0411-10006  None
 1941: Counter Attack (World 900227)                                89624B-3   YI24B            IOB1  88622-C-5    CPS-B-05  DL-0411-10006  None
 1941: Counter Attack (USA 900227)                                  89624B-3   YI24B            IOB1  88622-C-5    CPS-B-05  DL-0411-10006  None
-1941: Counter Attack (Japan)                                       89625B-1   YI22B            LWIO? 88622-C-5    CPS-B-05  DL-0411-10006  None
+1941: Counter Attack (Japan)                                       89625B-1   YI22B            LWIO  88622-C-5    CPS-B-05  DL-0411-10006  None
 
 Mercs (World 900302)                                         1990  89624B-3   O224B            IOB1  90628-C-1    CPS-B-12  DL-0411-10007  C628
 Mercs (USA 900302)                                                 89624B-3   O224B            IOB1  90628-C-1/2  CPS-B-12  DL-0411-10007  C628
@@ -1443,7 +1443,7 @@ static const struct CPS1config cps1_config_table[]=
 	{"1941",        CPS_B_05,     mapper_YI24B },
 	{"1941r1",      CPS_B_05,     mapper_YI24B },
 	{"1941u",       CPS_B_05,     mapper_YI24B },
-	{"1941j",       CPS_B_05,     mapper_YI24B },   // wrong, this set uses YI22B, still not dumped
+	{"1941j",       CPS_B_05,     mapper_YI24B },   // wrong, this set uses YI22B, dumped but equations still not added
 	{"unsquad",     CPS_B_11,     mapper_AR24B },
 	{"area88",      CPS_B_11,     mapper_AR22B },   // equivalent to AR24B
 	{"area88r",     CPS_B_21_DEF, mapper_AR22B },   // wrong, this set uses ARA63B, still not dumped