From f0c0b076e505839e6542ca672edd05773e258971 Mon Sep 17 00:00:00 2001
From: adelikat <adelikat@tasvideos.org>
Date: Thu, 27 Oct 2016 17:43:26 -0500
Subject: [PATCH] AxROM - support junko that has 16k prg by mirroring the block
 into both the 8x0000 and 0xC0000 regions.  I don't know if this is correct
 but it matches both fceux and nestopia behavior

---
 .../Consoles/Nintendo/NES/Boards/AxROM.cs                    | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/AxROM.cs b/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/AxROM.cs
index 020baca501..28dd117a49 100644
--- a/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/AxROM.cs
+++ b/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/AxROM.cs
@@ -65,6 +65,11 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
 
 		public override byte ReadPRG(int addr)
 		{
+			if (Cart.prg_size ==  16)
+			{
+				return ROM[(addr & 0x3FFF) | prg << 15];
+			}
+
 			return ROM[addr | prg << 15];
 		}