From d9db3e404fd92d1747ec0112765aeb8c5122e4d5 Mon Sep 17 00:00:00 2001
From: Rekai Musuka <rekai@musuka.dev>
Date: Tue, 15 Jun 2021 01:19:40 -0500
Subject: [PATCH] fix(ppu): stub IO address 0xFF7F

Tetris now runs without requiring any local modifications
---
 src/bus.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/bus.rs b/src/bus.rs
index 974f1db..57f035f 100644
--- a/src/bus.rs
+++ b/src/bus.rs
@@ -387,6 +387,7 @@ impl BusIo for Bus {
                             self.boot = None;
                         }
                     }
+                    0x7F => {} // Tetris tries to write to this non-existent IO Address
                     _ => unimplemented!("Unable to write to {:#06X} in I/O Registers", addr),
                 };
             }