From 8972c8d57fecffaddec8a03cc34508d3353eb9a1 Mon Sep 17 00:00:00 2001
From: alyosha-tas <alexei.f.k@gmail.com>
Date: Fri, 24 Nov 2017 20:21:53 -0500
Subject: [PATCH] GBHawk: Bug Fix

---
 .../Consoles/Nintendo/GBHawk/Mappers/Mapper_MBC3.cs           | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/BizHawk.Emulation.Cores/Consoles/Nintendo/GBHawk/Mappers/Mapper_MBC3.cs b/BizHawk.Emulation.Cores/Consoles/Nintendo/GBHawk/Mappers/Mapper_MBC3.cs
index 3a6422a415..f1ed2a807d 100644
--- a/BizHawk.Emulation.Cores/Consoles/Nintendo/GBHawk/Mappers/Mapper_MBC3.cs
+++ b/BizHawk.Emulation.Cores/Consoles/Nintendo/GBHawk/Mappers/Mapper_MBC3.cs
@@ -102,7 +102,7 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBHawk
 				}
 				else if (addr < 0x4000)
 				{
-					value &= 0x3F;
+					value &= 0x7F;
 
 					// writing zero gets translated to 1
 					if (value == 0) { value = 1; }
@@ -112,7 +112,7 @@ namespace BizHawk.Emulation.Cores.Nintendo.GBHawk
 				}
 				else if (addr < 0x6000)
 				{
-					RAM_bank = value;
+					RAM_bank = value & 3;
 				}
 				else
 				{