From 4ff77456e49c662612fe7a57200ff935d490a545 Mon Sep 17 00:00:00 2001
From: alyosha-tas <alexei.f.k@gmail.com>
Date: Fri, 28 Jan 2022 21:02:49 -0500
Subject: [PATCH] NESHawk: only add ines v2 submapper if it is non-zero, fixes
 #3082

---
 .../Consoles/Nintendo/NES/NES.iNES.cs                | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

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 757646148b..1b1dbdc786 100644
--- a/src/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/NES.iNES.cs
+++ b/src/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/NES.iNES.cs
@@ -48,7 +48,17 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
 
 				int mapper = data[6] >> 4 | data[7] & 0xf0 | data[8] << 8 & 0xf00;
 				int submapper = data[8] >> 4;
-				CartV2.BoardType = $"MAPPER{mapper:d4}-{submapper:d2}";
+
+				// only add submapper if it is non-zero
+				if (submapper != 0)
+				{
+					CartV2.BoardType = $"MAPPER{mapper:d4}-{submapper:d2}";
+				}
+				else
+				{
+					CartV2.BoardType = $"MAPPER{mapper:d4}";
+				}
+				
 
 				int vrambat = iNES2Wram(data[11] >> 4);
 				int vramnon = iNES2Wram(data[11] & 15);