diff --git a/src/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/SxROM.cs b/src/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/SxROM.cs
index 7f0d16c10a..d40cadd113 100644
--- a/src/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/SxROM.cs
+++ b/src/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/SxROM.cs
@@ -589,6 +589,11 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
 		{
 			switch (Cart.BoardType)
 			{
+				case "MAPPER0001-00":
+					if (Cart.WramSize < 32)
+						return false;
+					AssertPrg(128, 256, 512); AssertChr(0); AssertVram(8); AssertWram(32);
+					break;
 				case "HVC-SXROM": //final fantasy 1& 2
 					AssertPrg(128, 256, 512); AssertChr(0); AssertVram(8); AssertWram(32);
 					break;
diff --git a/src/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/NES.iNES.cs b/src/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/NES.iNES.cs
index 1b1dbdc786..757646148b 100644
--- a/src/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/NES.iNES.cs
+++ b/src/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/NES.iNES.cs
@@ -48,17 +48,7 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
 
 				int mapper = data[6] >> 4 | data[7] & 0xf0 | data[8] << 8 & 0xf00;
 				int submapper = data[8] >> 4;
-
-				// only add submapper if it is non-zero
-				if (submapper != 0)
-				{
-					CartV2.BoardType = $"MAPPER{mapper:d4}-{submapper:d2}";
-				}
-				else
-				{
-					CartV2.BoardType = $"MAPPER{mapper:d4}";
-				}
-				
+				CartV2.BoardType = $"MAPPER{mapper:d4}-{submapper:d2}";
 
 				int vrambat = iNES2Wram(data[11] >> 4);
 				int vramnon = iNES2Wram(data[11] & 15);