From 80858801300a2f48ad250721a79ebc7b1b0aba92 Mon Sep 17 00:00:00 2001
From: Nebuleon Fumika
Date: Thu, 20 Dec 2012 18:10:38 -0500
Subject: Remove the SNES Open Bus behaviour by default. Also simplify
 translation again.

SNES Open Bus is a quirk of the memory subsystem that allow reads of invalid addresses to return the last byte read from memory. However, it is seldom needed by a game, and it costs 1 to 3 MIPS instructions per SNES instruction to emulate.

If you need SNES Open Bus, you can remove -DNO_OPEN_BUS from the Makefile.
---
 source/memmap.h | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

(limited to 'source/memmap.h')

diff --git a/source/memmap.h b/source/memmap.h
index 58f0c9f..f838065 100644
--- a/source/memmap.h
+++ b/source/memmap.h
@@ -276,7 +276,7 @@ bool8 LoadZip(const char* zipname,
 END_EXTERN_C
 
 extern "C" {
-void S9xAutoSaveSRAM ();
+	void S9xAutoSaveSRAM ();
 }
 
 #ifdef NO_INLINE_SET_GET
@@ -288,9 +288,12 @@ void S9xSetPCBase (uint32 Address);
 uint8 *S9xGetMemPointer (uint32 Address);
 uint8 *GetBasePointer (uint32 Address);
 
-extern "C"{
-extern uint8 OpenBus;
+#ifndef NO_OPEN_BUS
+extern "C" {
+	extern uint8 OpenBus;
 }
+#endif
+
 #else
 #define INLINE inline
 #include "getset.h"
-- 
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