1 files changed, 70 insertions, 0 deletions
diff --git a/plugins/gme/game-music-emu-0.6pre/gme/Nes_Mmc5_Apu.h b/plugins/gme/game-music-emu-0.6pre/gme/Nes_Mmc5_Apu.h
new file mode 100644
index 00000000..f55b8d82
--- /dev/null
+++ b/plugins/gme/game-music-emu-0.6pre/gme/Nes_Mmc5_Apu.h
@@ -0,0 +1,70 @@
+// NES MMC5 sound chip emulator
+
+// Nes_Snd_Emu 0.2.0-pre
+#ifndef NES_MMC5_APU_H
+#define NES_MMC5_APU_H
+
+#include "blargg_common.h"
+#include "Nes_Apu.h"
+
+class Nes_Mmc5_Apu : public Nes_Apu {
+public:
+	enum { regs_addr = 0x5000 };
+	enum { regs_size = 0x16 };
+	
+	enum { osc_count  = 3 };
+	void write_register( blip_time_t, unsigned addr, int data );
+	void set_output( Blip_Buffer* );
+	void set_output( int index, Blip_Buffer* );
+	
+	enum { exram_size = 1024 };
+	unsigned char exram [exram_size];
+	
+	BLARGG_DEPRECATED_TEXT( enum { start_addr = 0x5000 }; )
+	BLARGG_DEPRECATED_TEXT( enum { end_addr   = 0x5015 }; )
+};
+
+inline void Nes_Mmc5_Apu::set_output( int i, Blip_Buffer* b )
+{
+	// in: square 1, square 2, PCM
+	// out: square 1, square 2, skipped, skipped, PCM
+	if ( i > 1 )
+		i += 2;
+	Nes_Apu::set_output( i, b );
+}
+
+inline void Nes_Mmc5_Apu::set_output( Blip_Buffer* b )
+{
+	set_output( 0, b );
+	set_output( 1, b );
+	set_output( 2, b );
+}
+
+inline void Nes_Mmc5_Apu::write_register( blip_time_t time, unsigned addr, int data )
+{
+	switch ( addr )
+	{
+	case 0x5015: // channel enables
+		data &= 0x03; // enable the square waves only
+		// fall through
+	case 0x5000: // Square 1
+	case 0x5002:
+	case 0x5003:
+	case 0x5004: // Square 2
+	case 0x5006:
+	case 0x5007:
+	case 0x5011: // DAC
+		Nes_Apu::write_register( time, addr - 0x1000, data );
+		break;
+	
+	case 0x5010: // some things write to this for some reason
+		break;
+	
+#ifdef BLARGG_DEBUG_H
+	default:
+			dprintf( "Unmapped MMC5 APU write: $%04X <- $%02X\n", addr, data );
+#endif
+	}
+}
+
+#endif