From 0fde806f62b184548a74043152ef6dccbaf37717 Mon Sep 17 00:00:00 2001
From: Alex Janka <alex@alexjanka.com>
Date: Sun, 12 Feb 2023 19:15:05 +1100
Subject: [PATCH] mbc bugfix

---
 src/processor/memory/rom/mbcs.rs | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/src/processor/memory/rom/mbcs.rs b/src/processor/memory/rom/mbcs.rs
index 2b22087..f867123 100644
--- a/src/processor/memory/rom/mbcs.rs
+++ b/src/processor/memory/rom/mbcs.rs
@@ -143,12 +143,10 @@ impl Mbc for Mbc1 {
             }
             0x6000..0x8000 => {
                 // mode select
-                self.bank_mode = if data == 0x1 {
+                self.bank_mode = if (data & 0x1) == 0x1 {
                     BankingMode::Advanced
-                } else if data == 0x0 {
-                    BankingMode::Simple
                 } else {
-                    self.bank_mode
+                    BankingMode::Simple
                 };
             }
             _ => {}