Created new functions for serialization and deserialization

README.md

@@ -1,32 +1,33 @@
 quickerNES
-============
+-----------
 
-quickerNES is an attempt to modernizing and improving the performance of quickNES, the fastest NES emulator in the interwebs (as far as I know). The goals for this project are, in order of importance:
+quickerNES is an attempt to modernizing and improving the performance of [quickNES](https://github.com/kode54/QuickNES). The goals for this project are, in order of importance:
 
-- Improve overall emulation performance even more
+- Improve overall emulation performance for modern (x86) CPUs
 - Modernize the code base with best programming practices, including CI tests, benchmarks, and coverage analysis
 - Add support for more mappers, controllers, and features supported by other emulators
 - Improve accuracy, if possible
 
-The main aim is to improve the performance of skip (non-rendering, no-audio) frame advances for brute force botting. (See: [JaffarPlus](https://github.com/SergioMartin86/jaffarPlus)). However, if this work might help with homebrew emulation and other people having more fun, then much better!
+The main aim is to improve the performance of headless re-recording for TASing and botting (See: [JaffarPlus](https://github.com/SergioMartin86/jaffarPlus)) purposes. However, if this work can help regular play emulation, then much better.
 
 Changes
-=========
+--------
 
 - Optimizations made in the CPU emulation core, including:
   + Forced alignment at the start of a page to prevent crossing cache line boundaries
-  + Simplifying instruction decode
+  + Simplifying the 6502 CPU instruction fetching and decoding
 - Minimize compiled code size to reduce pressure on L1i cache
 - Reduce heap allocations
+- General code reorganization (make it header only to help compiler optimizations)
 
 Credits
-=========
+---------
 
 - quickNES was originally by Shay Green (a.k.a. [Blaarg](http://www.slack.net/~ant/)) under the GNU GPLv2 license. The source code is still located [here](https://github.com/kode54/QuickNES) 
 - The code was later improved and maintained by Christopher Snowhill (a.k.a. [kode54](https://kode54.net/))
 - I could trace further contributions (e.g., new mappers) by retrowertz, CaH4e3, some adaptations from the [FCEUX emulator](https://github.com/TASEmulators/fceux) (see mapper021)
 - The latest version of the code is maintained by Libretro's community [here](https://github.com/libretro/QuickNES_Core)
-- For the interactive player, this project uses a modified version of [HeadlessQuickNES (HQN)](https://github.com/Bindernews/HeadlessQuickNes) by Drew (Binder News)
+- For the interactive player, this project drew some code from [HeadlessQuickNES (HQN)](https://github.com/Bindernews/HeadlessQuickNes) by Drew (Binder News)
 - We use some of the [NES test rom set](https://github.com/christopherpow/nes-test-roms) made by multiple authors and gathered by Christopher Pow et al.
 - We also use some movies from the [TASVideos](tasvideos.org) website for testing. These movies are copied into this repository with authorization under the Creative Commons Attribution 2.0 license.
 

source/emuInstance.hpp

@@ -86,15 +86,13 @@ class EmuInstance
  }
 
  inline size_t getStateSize() const { return _stateSize; }
+ inline size_t getLiteStateSize() const { return _liteStateSize; }
  inline std::string getRomSHA1() const { return _romSHA1String; }
 
  inline hash_t getStateHash() const
  {
   MetroHash128 hash;
 
-  uint8_t stateData[_stateSize];
-  serializeState(stateData);
-
   hash.Update(getLowMem(), _LOW_MEM_SIZE);
   hash.Update(getHighMem(), _HIGH_MEM_SIZE);
   hash.Update(getNametableMem(), _NAMETABLES_MEM_SIZE);
@@ -137,8 +135,11 @@ inline void loadROMFile(const std::string& romFilePath)
   status = loadROMFileImpl(_romData);
   if (status == false) EXIT_WITH_ERROR("Could not process ROM file: %s\n", romFilePath.c_str());
 
-  // Detecting state size
+  // Detecting full state size
   _stateSize = getStateSizeImpl();
+
+  // Detecting lite state size
+  _liteStateSize = getLiteStateSizeImpl();
 }
 
  // Virtual functions
@@ -153,6 +154,7 @@ inline void loadROMFile(const std::string& romFilePath)
  virtual void serializeState(uint8_t* state) const = 0;
  virtual void deserializeState(const uint8_t* state) = 0;
  virtual size_t getStateSizeImpl() const = 0;
+ virtual size_t getLiteStateSizeImpl() const { return getStateSizeImpl(); };
  virtual void doSoftReset() = 0;
  virtual void doHardReset() = 0;
  virtual std::string getCoreName() const = 0;
@@ -162,7 +164,10 @@ inline void loadROMFile(const std::string& romFilePath)
 
  EmuInstance() = default;
 
- // Storage for the state
+ // Storage for the light state size
+ size_t _liteStateSize;
+
+ // Storage for the full state size
  size_t _stateSize;
 
  // Flag to determine whether to enable/disable rendering

source/quickerNES/Nes_Core.h

@@ -16,13 +16,14 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
 // Nes_Emu 0.7.0
 
 
+#include <cstdio>
+#include <string>
 #include "blargg_common.h"
 #include "Nes_Apu.h"
 #include "Nes_Cpu.h"
 #include "Nes_Ppu.h"
 #include "Nes_Mapper.h"
 #include "Nes_State.h"
-#include <cstdio>
 
 /*
   New mapping distribution by Sergio Martin (eien86)
@@ -216,12 +217,321 @@ public:
 		return 0;
 	}
 
-	size_t getLightweightStateSize()
+	size_t getLiteStateSize() const
 	{
     size_t size = 0;
+
+    size += sizeof(nes_state_t);
+    size += sizeof(registers_t);
+    size += sizeof(ppu_state_t);
+    size += sizeof(Nes_Apu::apu_state_t);
+    size += sizeof(joypad_state_t);
+    size += mapper->state_size;
+    size += low_ram_size;
+		size += Nes_Ppu::spr_ram_size;
+		size_t nametable_size = 0x800;
+		if (ppu.nt_banks [3] >= &ppu.impl->nt_ram [0xC00] ) nametable_size = 0x1000;
+		size += nametable_size;
+    if ( ppu.chr_is_writable ) size += ppu.chr_size;
+		if ( sram_present )	size += impl->sram_size;
+
 		return size;
 	}
 	
+	size_t getStateSize() const
+	{
+    size_t size = 0;
+
+	  size += sizeof(char[4]); // NESS Block
+		size += sizeof(uint32_t); // Block Size
+  
+	  size += sizeof(char[4]); // TIME Block
+		size += sizeof(uint32_t); // Block Size
+    size += sizeof(nes_state_t);
+
+    size += sizeof(char[4]); // CPUR Block
+		size += sizeof(uint32_t); // Block Size
+    size += sizeof(registers_t);
+
+    size += sizeof(char[4]); // PPUR Block
+		size += sizeof(uint32_t); // Block Size
+    size += sizeof(ppu_state_t);
+
+    size += sizeof(char[4]); // APUR Block
+		size += sizeof(uint32_t); // Block Size
+    size += sizeof(Nes_Apu::apu_state_t);
+
+    size += sizeof(char[4]); // CTRL Block
+		size += sizeof(uint32_t); // Block Size
+    size += sizeof(joypad_state_t);
+
+		size += sizeof(char[4]); // MAPR Block
+		size += sizeof(uint32_t); // Block Size
+    size += mapper->state_size;
+
+    size += sizeof(char[4]); // LRAM Block
+		size += sizeof(uint32_t); // Block Size
+    size += low_ram_size;
+
+    size += sizeof(char[4]); // SPRT Block
+		size += sizeof(uint32_t); // Block Size
+		size += Nes_Ppu::spr_ram_size;
+
+		size += sizeof(char[4]); // NTAB Block
+		size += sizeof(uint32_t); // Block Size
+		size_t nametable_size = 0x800;
+		if (ppu.nt_banks [3] >= &ppu.impl->nt_ram [0xC00] ) nametable_size = 0x1000;
+		size += nametable_size;
+
+    if ( ppu.chr_is_writable )
+		{
+			size += sizeof(char[4]); // CHRR Block
+			size += sizeof(uint32_t); // Block Size
+			size += ppu.chr_size;
+		}
+
+		if ( sram_present )
+		{
+			size += sizeof(char[4]); // SRAM Block
+			size += sizeof(uint32_t); // Block Size
+			size += impl->sram_size;
+		}
+
+		size += sizeof(char[4]);  // gend Block
+		size += sizeof(uint32_t); // Block Size
+
+		return size;
+	}
+
+	size_t serializeState(uint8_t* buffer) const
+	{
+    size_t pos = 0;
+    std::string headerCode;
+		const uint32_t headerSize = sizeof(char) * 4;
+    uint32_t blockSize = 0;
+		void* dataSource;
+
+    headerCode = "NESS"; // NESS Block
+		blockSize = 0xFFFFFFFF; 
+		memcpy(&buffer[pos], headerCode.data(), headerSize); pos += headerSize;
+		memcpy(&buffer[pos], &blockSize,  headerSize); pos += headerSize;
+  
+	  headerCode = "TIME"; // TIME Block
+		nes_state_t state = nes;
+		state.timestamp *= 5;
+		blockSize = sizeof(nes_state_t); 
+		dataSource = (void*) &state;
+		memcpy(&buffer[pos], headerCode.data(), headerSize); pos += headerSize;
+		memcpy(&buffer[pos], &blockSize,  headerSize); pos += headerSize;
+		memcpy(&buffer[pos], dataSource, blockSize);   pos += blockSize;
+
+	  headerCode = "CPUR"; // CPUR Block
+		cpu_state_t s;
+		memset( &s, 0, sizeof s );
+		s.pc = r.pc;
+		s.s = r.sp;
+		s.a = r.a;
+		s.x = r.x;
+		s.y = r.y;
+		s.p = r.status;
+		blockSize = sizeof(cpu_state_t); 
+		dataSource = (void*) &s;
+		memcpy(&buffer[pos], headerCode.data(), headerSize); pos += headerSize;
+		memcpy(&buffer[pos], &blockSize,  headerSize); pos += headerSize;
+		memcpy(&buffer[pos], dataSource, blockSize);   pos += blockSize;
+
+	  headerCode = "PPUR"; // PPUR Block
+		blockSize = sizeof(ppu_state_t); 
+		dataSource = (void*) &ppu;
+		memcpy(&buffer[pos], headerCode.data(), headerSize); pos += headerSize;
+		memcpy(&buffer[pos], &blockSize,  headerSize); pos += headerSize;
+		memcpy(&buffer[pos], dataSource, blockSize);   pos += blockSize;
+
+	  headerCode = "APUR"; // APUR Block
+		Nes_Apu::apu_state_t apuState;
+		impl->apu.save_state(&apuState);
+		blockSize = sizeof(Nes_Apu::apu_state_t); 
+		memcpy(&buffer[pos], headerCode.data(), headerSize); pos += headerSize;
+		memcpy(&buffer[pos], &blockSize,  headerSize); pos += headerSize;
+		memcpy(&buffer[pos], &apuState, blockSize);   pos += blockSize;
+
+	  headerCode = "CTRL"; // CTRL Block
+		blockSize = sizeof(joypad_state_t); 
+		dataSource = (void*) &joypad;
+		memcpy(&buffer[pos], headerCode.data(), headerSize); pos += headerSize;
+		memcpy(&buffer[pos], &blockSize,  headerSize); pos += headerSize;
+		memcpy(&buffer[pos], dataSource, blockSize);   pos += blockSize;
+
+	  headerCode = "MAPR"; // MAPR Block
+		blockSize = mapper->state_size; 
+		dataSource = (void*) mapper->state;
+		memcpy(&buffer[pos], headerCode.data(), headerSize); pos += headerSize;
+		memcpy(&buffer[pos], &blockSize,  headerSize); pos += headerSize;
+		memcpy(&buffer[pos], dataSource, blockSize);   pos += blockSize;
+
+	  headerCode = "LRAM"; // LRAM Block
+		blockSize = low_ram_size; 
+		dataSource = (void*) low_mem;
+		memcpy(&buffer[pos], headerCode.data(), headerSize); pos += headerSize;
+		memcpy(&buffer[pos], &blockSize,  headerSize); pos += headerSize;
+		memcpy(&buffer[pos], dataSource, blockSize);   pos += blockSize;
+
+	  headerCode = "SPRT"; // SPRT Block
+		blockSize = Nes_Ppu::spr_ram_size; 
+		dataSource = (void*) ppu.spr_ram;
+		memcpy(&buffer[pos], headerCode.data(), headerSize); pos += headerSize;
+		memcpy(&buffer[pos], &blockSize,  headerSize); pos += headerSize;
+		memcpy(&buffer[pos], dataSource, blockSize);   pos += blockSize;
+
+	  headerCode = "NTAB"; // NTAB Block
+		size_t nametable_size = 0x800;
+		if (ppu.nt_banks [3] >= &ppu.impl->nt_ram [0xC00] ) nametable_size = 0x1000;
+		blockSize = nametable_size; 
+		dataSource = (void*) ppu.impl->nt_ram;
+		memcpy(&buffer[pos], headerCode.data(), headerSize); pos += headerSize;
+		memcpy(&buffer[pos], &blockSize,  headerSize); pos += headerSize;
+		memcpy(&buffer[pos], dataSource, blockSize);   pos += blockSize;
+
+    if ( ppu.chr_is_writable )
+		{
+		  headerCode = "CHRR"; // CHRR Block
+			blockSize = ppu.chr_size; 
+			dataSource = (void*) ppu.impl->chr_ram;
+			memcpy(&buffer[pos], headerCode.data(), headerSize); pos += headerSize;
+			memcpy(&buffer[pos], &blockSize,  headerSize); pos += headerSize;
+			memcpy(&buffer[pos], dataSource, blockSize);   pos += blockSize;
+		}
+
+		if ( sram_present )
+		{
+			headerCode = "SRAM"; // SRAM Block
+			blockSize = impl->sram_size; 
+			dataSource = (void*) impl->sram;
+			memcpy(&buffer[pos], headerCode.data(), headerSize); pos += headerSize;
+			memcpy(&buffer[pos], &blockSize,  headerSize); pos += headerSize;
+			memcpy(&buffer[pos], dataSource, blockSize);   pos += blockSize;
+		}
+
+		headerCode = "gend"; // gend Block
+		blockSize = 0; 
+		memcpy(&buffer[pos], headerCode.data(), headerSize); pos += headerSize;
+		memcpy(&buffer[pos], &blockSize,  headerSize); pos += headerSize;
+
+		return pos; // Bytes written
+	}
+
+  size_t deserializeState(const uint8_t* buffer)
+	{
+		disable_rendering();
+		error_count = 0;
+    ppu.burst_phase = 0; // avoids shimmer when seeking to same time over and over
+
+    size_t pos = 0;
+		const uint32_t headerSize = sizeof(char) * 4;
+    uint32_t blockSize = 0;
+
+    // NESS Block
+		pos += headerSize;
+		pos += headerSize;
+  
+	  // TIME Block
+		nes_state_t nesState;
+		pos += headerSize;
+		pos += headerSize;
+		blockSize = sizeof(nes_state_t);
+		memcpy(&nesState, &buffer[pos], blockSize);  pos += blockSize;
+		nes = nesState;
+	  nes.timestamp /= 5;
+
+	  // CPUR Block
+		cpu_state_t s;
+		blockSize = sizeof(cpu_state_t); 
+		pos += headerSize;
+		pos += headerSize;
+		memcpy((void*) &s, &buffer[pos], blockSize); pos += blockSize;
+		r.pc = s.pc; 
+		r.sp = s.s; 
+		r.a = s.a; 
+		r.x = s.x; 
+		r.y = s.y; 
+		r.status = s.p; 
+
+	  // PPUR Block
+		blockSize = sizeof(ppu_state_t); 
+		pos += headerSize;
+		pos += headerSize;
+		memcpy((void*) &ppu, &buffer[pos], blockSize);   pos += blockSize;
+
+	  // APUR Block
+		Nes_Apu::apu_state_t apuState;
+		blockSize = sizeof(Nes_Apu::apu_state_t); 
+		pos += headerSize;
+		pos += headerSize;
+		memcpy(&apuState, &buffer[pos], blockSize); 
+		pos += blockSize;
+		impl->apu.load_state(apuState);
+    impl->apu.end_frame( -(int) nes.timestamp / ppu_overclock );
+
+	  // CTRL Block
+		blockSize = sizeof(joypad_state_t); 
+		pos += headerSize;
+		pos += headerSize;
+		memcpy((void*) &joypad, &buffer[pos], blockSize); pos += blockSize;
+
+	  // MAPR Block
+		mapper->default_reset_state();
+		blockSize = mapper->state_size; 
+		pos += headerSize;
+		pos += headerSize;
+		memcpy((void*) mapper->state, &buffer[pos], blockSize); pos += blockSize;
+    mapper->apply_mapping();
+
+	  // LRAM Block
+		blockSize = low_ram_size; 
+		pos += headerSize;
+		pos += headerSize;
+		memcpy((void*) low_mem, &buffer[pos], blockSize); pos += blockSize;
+
+	  // SPRT Block
+		blockSize = Nes_Ppu::spr_ram_size; 
+		pos += headerSize;
+		pos += headerSize;
+		memcpy((void*) ppu.spr_ram, &buffer[pos], blockSize);  pos += blockSize;
+
+	  // NTAB Block
+		size_t nametable_size = 0x800;
+		if (ppu.nt_banks [3] >= &ppu.impl->nt_ram [0xC00] ) nametable_size = 0x1000;
+		blockSize = nametable_size; 
+		pos += headerSize;
+		pos += headerSize;
+		memcpy((void*) ppu.impl->nt_ram, &buffer[pos], blockSize); pos += blockSize;
+
+    if ( ppu.chr_is_writable )
+		{
+		  // CHRR Block
+			blockSize = ppu.chr_size; 
+			pos += headerSize;
+			pos += headerSize;
+			memcpy((void*) ppu.impl->chr_ram, &buffer[pos], blockSize);  pos += blockSize;
+		}
+
+		if ( sram_present )
+		{
+			// SRAM Block
+			blockSize = impl->sram_size; 
+			pos += headerSize;
+			pos += headerSize;
+			memcpy((void*) impl->sram, &buffer[pos], blockSize);  pos += blockSize;
+			enable_sram(true);
+		}
+   
+		// headerCode = "gend"; // gend Block
+		pos += headerSize;
+		pos += headerSize;
+
+		return pos; // Bytes read
+	}
+
 	void reset( bool full_reset, bool erase_battery_ram )
 	{
 		if ( full_reset )
@@ -347,50 +657,50 @@ public:
 		
 	void load_state( Nes_State_ const& in )
 	{
-		disable_rendering();
+		// disable_rendering();
-		error_count = 0;
+		// error_count = 0;
 		
-		if ( in.nes_valid )
+		// if ( in.nes_valid )
-			nes = in.nes;
+		// 	nes = in.nes;
 		
-		// always use frame count
+		// // always use frame count
-		ppu.burst_phase = 0; // avoids shimmer when seeking to same time over and over
+		// ppu.burst_phase = 0; // avoids shimmer when seeking to same time over and over
-		nes.frame_count = in.nes.frame_count;
+		// nes.frame_count = in.nes.frame_count;
-		if ( (frame_count_t) nes.frame_count == invalid_frame_count )
+		// if ( (frame_count_t) nes.frame_count == invalid_frame_count )
-			nes.frame_count = 0;
+		// 	nes.frame_count = 0;
 		
-		if ( in.cpu_valid )
+		// if ( in.cpu_valid )
-			cpu::r = *in.cpu;
+		// 	cpu::r = *in.cpu;
 		
-		if ( in.joypad_valid )
+		// if ( in.joypad_valid )
-			joypad = *in.joypad;
+		// 	joypad = *in.joypad;
 		
-		if ( in.apu_valid )
+		// if ( in.apu_valid )
-		{
+		// {
-			impl->apu.load_state( *in.apu );
+		// 	impl->apu.load_state( *in.apu );
-			// prevent apu from running extra at beginning of frame
+		// 	// prevent apu from running extra at beginning of frame
-			impl->apu.end_frame( -(int) nes.timestamp / ppu_overclock );
+		// 	impl->apu.end_frame( -(int) nes.timestamp / ppu_overclock );
-		}
+		// }
-		else
+		// else
-		{
+		// {
-			impl->apu.reset();
+		// 	impl->apu.reset();
-		}
+		// }
 		
-		ppu.load_state( in );
+		// ppu.load_state( in );
 		
-		if ( in.ram_valid )
+		// if ( in.ram_valid )
-			memcpy( cpu::low_mem, in.ram, in.ram_size );
+		// 	memcpy( cpu::low_mem, in.ram, in.ram_size );
 		
-		sram_present = false;
+		// sram_present = false;
-		if ( in.sram_size )
+		// if ( in.sram_size )
-		{
+		// {
-			sram_present = true;
+		// 	sram_present = true;
-			memcpy( impl->sram, in.sram, min( (int) in.sram_size, (int) sizeof impl->sram ) );
+		// 	// memcpy( impl->sram, in.sram, min( (int) in.sram_size, (int) sizeof impl->sram ) );
-			enable_sram( true ); // mapper can override (read-only, unmapped, etc.)
+		// 	enable_sram( true ); // mapper can override (read-only, unmapped, etc.)
-		}
+		// }
 		
-		if ( in.mapper_valid ) // restore last since it might reconfigure things
+		// if ( in.mapper_valid ) // restore last since it might reconfigure things
-			mapper->load_state( *in.mapper );
+		// 	mapper->load_state( *in.mapper );
 	}
 	
 	void irq_changed()

source/quickerNES/Nes_Emu.h

@@ -42,7 +42,8 @@ public:
 
    const uint8_t* getHostPixels () const { return emu.ppu.host_pixels; }
     
-	size_t getLightweightStateSize() { return emu.getLightweightStateSize(); }
+	size_t getLiteStateSize() const { return emu.getLiteStateSize(); }
+	size_t getStateSize() const { return emu.getStateSize(); }
 
 // Basic emulation
 
@@ -140,6 +141,8 @@ public:
 	// Save emulator state
 	void save_state( Nes_State* s ) const { emu.save_state( s ); }
 	const char * save_state( Auto_File_Writer ) const;
+  size_t serializeState (uint8_t* buffer) const { return emu.serializeState(buffer); }
+	size_t deserializeState (const uint8_t* buffer) { return emu.deserializeState(buffer); }
 
 	// Load state into emulator
 	void load_state( Nes_State const& );

source/quickerNES/Nes_Mapper.h

@@ -68,6 +68,9 @@ public:
 	// $2006 and $2007 accesses (but not due to PPU scanline rendering).
 	virtual void a12_clocked();
 	
+	void* state;
+	unsigned state_size;
+
 protected:
 	// Services provided for derived mapper classes
 	Nes_Mapper();
@@ -147,9 +150,7 @@ protected:
 	// apply_mapping().
 	virtual void read_state( mapper_state_t const& );
 	
-	// Apply current mapping state to hardware. Called after reading mapper state
+
-	// from a snapshot.
-	virtual void apply_mapping() = 0;
 	
 	// Called by default reset() before apply_mapping() is called.
 	virtual void reset_state() { }
@@ -161,11 +162,9 @@ protected:
 	Nes_Cart const* cart_;
   Nes_Core* emu_;
 
-private:
+	// Apply current mapping state to hardware. Called after reading mapper state
-	
+	// from a snapshot.
-	void* state;
+	virtual void apply_mapping() = 0;
-	unsigned state_size;
-	
 	
 	void default_reset_state();
 };

source/quickerNES/Nes_Ppu_Impl.cpp

@@ -3,6 +3,7 @@
 
 #include "Nes_Ppu_Impl.h"
 
+#include <cstdio>
 #include <string.h>
 #include "blargg_endian.h"
 #include "Nes_State.h"

source/quickerNES/Nes_Ppu_Impl.h

@@ -30,6 +30,10 @@ public:
 	static const uint16_t buffer_height = image_height;
 	enum { spr_ram_size = 0x100 };
 
+	uint8_t* nt_banks [4];
+	bool chr_is_writable;
+	long chr_size;
+	
 	int write_2007( int );
 	
 	// Host palette
@@ -67,9 +71,10 @@ public:
 	
 	uint8_t* getSpriteRAM () { return spr_ram; }
 	uint16_t getSpriteRAMSize () { return spr_ram_size; }
-
-protected:
 	uint8_t spr_ram [spr_ram_size];
+			void all_tiles_modified();
+protected:
+
 	void begin_frame();
 	void run_hblank( int );
 	int sprite_height() const { return (w2000 >> 2 & 8) + 8; }
@@ -90,7 +95,6 @@ protected: //friend class Nes_Ppu_Rendering; private:
 	void capture_palette();
 	
 	bool any_tiles_modified;
-	bool chr_is_writable;
 	void update_tiles( int first_tile );
 	
 	typedef uint32_t cache_t;
@@ -128,7 +132,7 @@ private:
 
 		return ret;
 	}
-	uint8_t* nt_banks [4];
+
 
 	bool mmc24_enabled;
 	uint8_t mmc24_latched [2];
@@ -136,7 +140,6 @@ private:
 	// CHR data
 	uint8_t const* chr_data; // points to chr ram when there is no read-only data
 	uint8_t* chr_ram; // always points to impl->chr_ram; makes write_2007() faster
-	long chr_size;
 	uint8_t const* map_chr( int addr ) { return &chr_data [map_chr_addr( addr )]; }
 	
 	// CHR cache
@@ -147,7 +150,7 @@ private:
 		uint8_t modified_tiles [chr_tile_count / 8];
 		uint32_t align_;
 	};
-	void all_tiles_modified();
+
 	void update_tile( int index );
 };
 

source/quickerNES/quickerNESInstance.hpp

@@ -26,9 +26,6 @@ class QuickerNESInstance : public EmuInstance
  {
   // Loading rom data
   auto result = _nes->load_ines((uint8_t*)romData.data());
-
-  // printf("Lightweight size: %lu vs Full Size: %lu\n", _nes->getLightweightStateSize(), getStateSizeImpl());
-  // exit(0);
   return result == 0;
  }
 
@@ -40,16 +37,12 @@ class QuickerNESInstance : public EmuInstance
 
  void serializeState(uint8_t* state) const 
  {
-  Mem_Writer w(state, _stateSize, 0);
+    _nes->serializeState(state);
-  Auto_File_Writer a(w);
-  _nes->save_state(a);
  }
 
  void deserializeState(const uint8_t* state) 
  {
-  Mem_File_Reader r(state, _stateSize);
+  _nes->deserializeState(state);
-  Auto_File_Reader a(r);
-  _nes->load_state(a);
  }
 
  void advanceStateImpl(const inputType controller1, const inputType controller2) override
@@ -66,13 +59,14 @@ class QuickerNESInstance : public EmuInstance
 
  private:
 
- inline size_t getStateSizeImpl() const
+ inline size_t getStateSizeImpl() const override
  {
-    // Using dry writer to just obtain the state size
+    return _nes->getStateSize();
-    Dry_Writer w;
+ }
-    Auto_File_Writer a(w);
+
-    _nes->save_state(a);
+ inline size_t getLiteStateSizeImpl() const override
-    return w.size();
+ {
+    return _nes->getLiteStateSize();
  }
 
  // Video buffer

source/tester.cpp

@@ -92,9 +92,12 @@ int main(int argc, char *argv[])
   // Getting initial hash
   auto initialHash = e.getStateHash();
 
-  // Getting state size
+  // Getting full state size
   const auto stateSize = e.getStateSize();
 
+  // Getting lite state size
+  const auto liteStateSize = e.getLiteStateSize();
+
   // Getting actual ROM SHA1
   auto romSHA1 = e.getRomSHA1();
 
@@ -124,7 +127,8 @@ int main(int argc, char *argv[])
   printf("[] Sequence File:           '%s'\n", sequenceFilePath.c_str());
   printf("[] Sequence Length:         %lu\n", sequenceLength);
   printf("[] Initial State Hash:      0x%lX%lX\n", initialHash.first, initialHash.second);
-  printf("[] State Size:              %lu bytes\n", stateSize);
+  printf("[] Full State Size:         %lu bytes\n", stateSize);
+  printf("[] Lite State Size:         %lu bytes\n", liteStateSize);
   printf("[] ********** Running Test **********\n");
   
   fflush(stdout);