1 files changed, 116 insertions, 0 deletions
diff --git a/plugins/gme/game-music-emu-0.6pre/gme/Nsf_Cpu.cpp b/plugins/gme/game-music-emu-0.6pre/gme/Nsf_Cpu.cpp
new file mode 100644
index 00000000..296c2f1c
--- /dev/null
+++ b/plugins/gme/game-music-emu-0.6pre/gme/Nsf_Cpu.cpp
@@ -0,0 +1,116 @@
+// Normal CPU for NSF emulator
+
+// Game_Music_Emu 0.6-pre. http://www.slack.net/~ant/
+
+#include "Nsf_Impl.h"
+
+#include "blargg_endian.h"
+
+#ifdef BLARGG_DEBUG_H
+	//#define CPU_LOG_START 1000000
+	//#include "nes_cpu_log.h"
+	#undef LOG_MEM
+#endif
+
+/* Copyright (C) 2003-2008 Shay Green. This module is free software; you
+can redistribute it and/or modify it under the terms of the GNU Lesser
+General Public License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version. This
+module is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
+details. You should have received a copy of the GNU Lesser General Public
+License along with this module; if not, write to the Free Software Foundation,
+Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */
+
+#include "blargg_source.h"
+
+#ifndef LOG_MEM
+	#define LOG_MEM( addr, str, data ) data
+#endif
+
+int Nsf_Impl::read_mem( addr_t addr )
+{
+	int result = low_ram [addr & (low_ram_size-1)]; // also handles wrap-around
+	if ( addr & 0xE000 )
+	{
+		result = *cpu.get_code( addr );
+		if ( addr < sram_addr )
+		{
+			if ( addr == apu.status_addr )
+				result = apu.read_status( time() );
+			else
+				result = cpu_read( addr );
+		}
+	}
+	return LOG_MEM( addr, ">", result );
+}
+
+void Nsf_Impl::write_mem( addr_t addr, int data )
+{
+	(void) LOG_MEM( addr, "<", data );
+	
+	int offset = addr - sram_addr;
+	if ( (unsigned) offset < sram_size )
+	{
+		sram() [offset] = data;
+	}
+	else
+	{
+		// after sram because CPU handles most low_ram accesses internally already
+		int temp = addr & (low_ram_size-1); // also handles wrap-around
+		if ( !(addr & 0xE000) )
+		{
+			low_ram [temp] = data;
+		}
+		else
+		{
+			int bank = addr - banks_addr;
+			if ( (unsigned) bank < bank_count )
+			{
+				write_bank( bank, data );
+			}
+			else if ( (unsigned) (addr - apu.io_addr) < apu.io_size )
+			{
+				apu.write_register( time(), addr, data );
+			}
+			else
+			{
+			#if !NSF_EMU_APU_ONLY
+				// 0x8000-0xDFFF is writable
+				int i = addr - 0x8000;
+				if ( (unsigned) i < fdsram_size && fds_enabled() )
+					fdsram() [i] = data;
+				else
+			#endif
+				cpu_write( addr, data );
+			}
+		}
+	}
+}
+
+#define READ_LOW(  addr       ) (LOG_MEM( addr, ">", low_ram [addr] ))
+#define WRITE_LOW( addr, data ) (LOG_MEM( addr, "<", low_ram [addr] = data ))
+
+#define CAN_WRITE_FAST( addr )  (addr < low_ram_size)
+#define WRITE_FAST              WRITE_LOW
+
+// addr < 0x2000 || addr >= 0x8000
+#define CAN_READ_FAST( addr )   ((addr ^ 0x8000) < 0xA000)
+#define READ_FAST( addr, out  ) (LOG_MEM( addr, ">", out = READ_CODE( addr ) ))
+
+#define READ_MEM(  addr       ) read_mem(  addr )
+#define WRITE_MEM( addr, data ) write_mem( addr, data )
+
+#define CPU cpu
+
+#define CPU_BEGIN \
+bool Nsf_Impl::run_cpu_until( time_t end )\
+{\
+	cpu.set_end_time( end );\
+	if ( *cpu.get_code( cpu.r.pc ) != cpu.halt_opcode )\
+	{
+		#include "Nes_Cpu_run.h"
+	}
+	return cpu.time_past_end() < 0;
+}