From f544c044bf18caba353fc873576b59de3a0b3255 Mon Sep 17 00:00:00 2001
From: alyosha-tas <alexei.f.k@gmail.com>
Date: Mon, 8 Jul 2019 08:16:43 -0400
Subject: [PATCH] NES MMC3: Mapper test indicates IRQ was happening one ppu
 tick too late.

---
 .../Consoles/Nintendo/NES/Boards/MMC3_family/MMC3.cs            | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/MMC3_family/MMC3.cs b/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/MMC3_family/MMC3.cs
index cddb957e3d..5efb4ebfba 100644
--- a/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/MMC3_family/MMC3.cs
+++ b/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/MMC3_family/MMC3.cs
@@ -307,7 +307,7 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
 					else
 					{
 						separator_counter = 15;
-						irq_countdown = 6;
+						irq_countdown = 5;
 					}
 				}