diff --git a/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/SxROM.cs b/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/SxROM.cs
index 92452c7df0..3c9140dda4 100644
--- a/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/SxROM.cs
+++ b/BizHawk.Emulation/Consoles/Nintendo/NES/Boards/SxROM.cs
@@ -308,6 +308,8 @@ namespace BizHawk.Emulation.Consoles.Nintendo
 				case "HVC-SNROM":
 					AssertPrg(128, 256); AssertChr(0); AssertVram(8); AssertWram(8);
 					break;
+				case "SxROM-JUNK":
+					break;
 				default:
 					return false;
 			}
diff --git a/BizHawk.Emulation/Consoles/Nintendo/NES/iNES.cs b/BizHawk.Emulation/Consoles/Nintendo/NES/iNES.cs
index b966856120..baf78c2836 100644
--- a/BizHawk.Emulation/Consoles/Nintendo/NES/iNES.cs
+++ b/BizHawk.Emulation/Consoles/Nintendo/NES/iNES.cs
@@ -24,10 +24,12 @@ namespace BizHawk.Emulation.Consoles.Nintendo
 				{
 					//if it didnt work, try again with a different wram size. because iNES is weird that way
 					key = string.Format("{0}	{1}	{2}	{3}	{4}", cartInfo.mapper, cartInfo.prg_size, cartInfo.chr_size, 8, cartInfo.vram_size);
-					Table.TryGetValue(key, out board);
-					//if it still didnt work, look for one with empty keys, to detect purely based on mapper
-					key = string.Format("{0}	{1}	{2}	{3}	{4}", cartInfo.mapper, -1,-1,-1,-1);
-					Table.TryGetValue(key, out board);
+					if (!Table.TryGetValue(key, out board))
+					{
+						//if it still didnt work, look for one with empty keys, to detect purely based on mapper
+						key = string.Format("{0}	{1}	{2}	{3}	{4}", cartInfo.mapper, -1, -1, -1, -1);
+						Table.TryGetValue(key, out board);
+					}
 				}
 				return board;
 			}
@@ -73,6 +75,7 @@ static string ClassifyTable = @"
 0	16	0	8	8	NROM-HOMEBREW; some of blargg's test (sprite tests)
 0	16	8	8	0	NES-NROM-128; balloon fight, but its broken right now
 0	32	8	8	0	NES-NROM-256; super mario bros
+1	32	128	8	0	SxROM-JUNK; 'goodnes' tetris dump
 1	32	32	8	0	NES-SEROM; lolo
 1	128	0	8	0	NES-SNROM; zelda
 1	128	128	8	0	NES-SKROM; zelda 2