commit 5c528eb8d224a9c46ef25084e37b062eb4e8ebbc
Author: YayIguess <braidengent@gmail.com>
Date:   Mon Feb 5 03:09:55 2024 -0800

    initial upload

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..788d578
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,5 @@
+cmake-build-debug/
+.idea
+
+roms/
+bootrom.bin
diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..3d32882
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,10 @@
+cmake_minimum_required(VERSION 3.25)
+project(GBpp)
+set(CMAKE_CXX_STANDARD 23)
+
+find_package(SDL2 REQUIRED)
+include_directories(${SDL2_INCLUDE_DIRS})
+
+add_executable(GBpp src/main.cpp src/gameboy.cpp src/opcode.cpp
+        src/interupts.cpp src/ppu.cpp)
+target_link_libraries(GBpp ${SDL2_LIBRARIES})
\ No newline at end of file
diff --git a/src/defines.hpp b/src/defines.hpp
new file mode 100644
index 0000000..043466d
--- /dev/null
+++ b/src/defines.hpp
@@ -0,0 +1,51 @@
+#ifndef GBPP_SRC_DEFINES_HPP_
+#define GBPP_SRC_DEFINES_HPP_
+
+#define Word uint16_t
+#define Byte uint8_t
+
+// Bit  Name  Set Clr  Expl.
+// 7    zf    Z   NZ   Zero Flag
+// 6    n     -   -    Add/Sub-Flag (BCD)
+// 5    h     -   -    Half Carry Flag (BCD)
+// 4    cy    C   NC   Carry Flag
+// 3-0  -     -   -    Not used (always zero)
+#define CARRY_FLAG 4 //'C'
+#define HALFCARRY_FLAG 5 //'H'
+#define SUBTRACT_FLAG 6 //'N'
+#define ZERO_FLAG 7 //'Z'
+
+#define VBLANK_INTERRUPT 0
+#define LCD_STAT_INTERRUPT 1
+#define TIMER_INTERRUPT 2
+#define SERIAL_INTERRUPT 3
+#define JOYPAD_INTERRUPT 4
+
+#define T_CLOCK_FREQ 4194304
+
+#define DIVIDER_REGISTER_FREQ 16384
+
+#define BOOTROM_SIZE 0x100
+
+#define RESOLUTION_X 160
+#define RESOLUTION_Y 144
+#define SCREEN_BPP 3
+
+#define ROM_BANK_SIZE 0x4000
+
+#define SCANLINES_PER_FRAME 154
+#define SCANLINE_DURATION 456
+#define FRAME_DURATION 70224
+#define MODE2_DURATION 80
+#define MODE3_BASE_DURATION 168
+#define MODE0_3_DURATION 376 //mode3 is 168 to 291, mode0 85 to 208
+#define MODE1_DURATION 4560
+
+#define H_SYNC 9198
+#define V_SYNC 59.73
+#define HBlank_DURATION 204 //GPU_MODE 0
+#define SCANLINE_OAM_FREQ 80 //GPU_MODE 2
+#define SCANLINE_VRAM_FREQ 80 //GPU_MODE 3
+
+
+#endif
diff --git a/src/gameboy.cpp b/src/gameboy.cpp
new file mode 100644
index 0000000..18654b1
--- /dev/null
+++ b/src/gameboy.cpp
@@ -0,0 +1,94 @@
+#include <iostream>
+#include "gameboy.hpp"
+
+bool AddressSpace::getBootromState()
+{
+	return bootromLoaded;
+}
+
+void AddressSpace::unmapBootrom()
+{
+	bootromLoaded = false;
+}
+
+void AddressSpace::mapBootrom()
+{
+	bootromLoaded = true;
+}
+
+void AddressSpace::loadBootrom(std::string filename)
+{
+	std::ifstream file;
+	int size = std::filesystem::file_size(filename);
+	if(size != 256)
+	{
+		std::cerr << "Bootrom was an unexpected size!\nQuitting!\n" << std::endl;
+		exit(1);
+	}
+	file.open(filename, std::ios::binary);
+	file.read(reinterpret_cast<char *>(bootrom), BOOTROM_SIZE);
+}
+
+void AddressSpace::loadGame(std::string filename)
+{
+	game.open(filename, std::ios::binary);
+
+	if(!game.is_open())
+	{
+		std::cerr << "Game was not found!\nQuitting!\n" << std::endl;
+		exit(1);
+	}
+	game.read(reinterpret_cast<char *>(memoryLayout.romBank1), ROM_BANK_SIZE*2);
+}
+
+void GameBoy::addCycles(uint8_t ticks)
+{
+	cycles = (cycles+ticks) % T_CLOCK_FREQ;
+	lastOpTicks = ticks;
+}
+
+void test()
+{
+	printf("");
+}
+
+void GameBoy::start(std::string bootrom, std::string game)
+{
+	addressSpace.loadBootrom(bootrom);
+	addressSpace.loadGame(game);
+
+	bool quit = false;
+	while(!quit)
+	{
+		// Event loop: Check and handle SDL events
+//		if(SDL_PollEvent(&event))
+//		{
+//			if(event.type == SDL_QUIT)
+//			{
+//				quit = true; // Set the quit flag when the close button is hit
+//			}
+//		}
+
+		opcodeHandler();
+		interruptHandler();
+		//timing();
+		ppuUpdate();
+		if(PC == 0x8c && DE.hi == 0)
+			test();
+		if(PC > 0xFF && addressSpace.getBootromState())
+		{
+			addressSpace.unmapBootrom();
+		}
+		if(PC > 0x2FF)
+		{
+			test();
+		}
+		int cyclesSince = cyclesSinceLastRefresh();
+		if(cyclesSince > FRAME_DURATION)
+		{
+			lastRefresh = cycles;
+			SDL2present();
+		}
+	}
+}
+
diff --git a/src/gameboy.hpp b/src/gameboy.hpp
new file mode 100644
index 0000000..291d9e0
--- /dev/null
+++ b/src/gameboy.hpp
@@ -0,0 +1,277 @@
+#ifndef GBPP_SRC_GAMEBOY_HPP_
+#define GBPP_SRC_GAMEBOY_HPP_
+
+#include <filesystem>
+#include <cstdint>
+#include <cstring>
+#include <string>
+#include <fstream>
+#include <vector>
+#include <SDL.h>
+#include "defines.hpp"
+
+//two bits per colour
+enum Colour
+{
+	black = 0b11,
+	darkGray = 0b10,
+	lightGray = 0b01,
+	white = 0b00
+};
+
+enum PPUMode
+{
+	mode0,       // Horizontal Blank (Mode 0): No access to video RAM, occurs during horizontal blanking period.
+	mode1,       // Vertical Blank (Mode 1): No access to video RAM, occurs during vertical blanking period.
+	mode2,    // OAM Search (Mode 2): Access to OAM (Object Attribute Memory) only, sprite evaluation.
+	mode3 // Pixel Transfer (Mode 3): Access to both OAM and video RAM, actual pixel transfer to the screen.
+};
+
+union RegisterPair
+{
+	Word reg; //register.reg == (hi << 8) + lo. (hi is more significant than lo)
+
+	struct
+	{
+		Byte lo;
+		Byte hi;
+	};
+};
+
+class AddressSpace
+{
+  private:
+	bool bootromLoaded = true;
+	Byte bootrom[BOOTROM_SIZE];
+	std::ifstream game;
+
+ public:
+	AddressSpace()
+	{
+		// Initialize the memory to zero
+		memoryLayout = {};
+		std::memset(memoryLayout.memory, 0, sizeof(memoryLayout.memory));
+	}
+
+	// Nested union for the memory layout
+	union MemoryLayout
+	{
+		Byte memory[0x10000];
+		struct
+		{
+			Byte romBank1[ROM_BANK_SIZE];          // Mapped to 0x0000
+			Byte romBankSwitch[ROM_BANK_SIZE];     // Mapped to 0x4000
+			Byte vram[0x2000];              // Mapped to 0x8000
+			Byte externalRam[0x2000];       // Mapped to 0xA000
+			Byte memoryBank1[0x1000];       // Mapped to 0xC000
+			Byte memoryBank2[0x1000];       // Mapped to 0xD000
+			Byte echoRam[0x1E00];           // Mapped to 0xE000 (Echo RAM, mirrors 0xC000 to 0xDFFF)
+			Byte spriteAttributeTable[0xA0]; // Mapped to 0xFE00
+			Byte notUsable[0x60];           // Mapped to 0xFEA0
+			Byte io[0x80];                  // Mapped to 0xFF00, 0xFF0F is interrupt flag
+			Byte specialRam[0x7F];          // Mapped to 0xFF80
+			Byte interuptEnableReg;         // Mapped to 0xFFFF
+		};
+	} memoryLayout;
+
+	bool getBootromState();
+	void unmapBootrom();
+	void mapBootrom();
+	void loadBootrom(std::string filename);
+	void loadGame(std::string filename);
+
+	//overload [] for echo ram and bootrom support
+	Byte operator[](uint32_t address) const
+	{
+		if(address >= 0xE000 && address < 0xFE00)
+			return memoryLayout.echoRam[address - 0xE000];
+		if(address < 0x0100 && bootromLoaded)
+			return bootrom[address];
+		else
+			return memoryLayout.memory[address];
+	}
+	Byte& operator[](uint32_t address)
+	{
+		if(address >= 0xE000 && address < 0xFE00)
+			return memoryLayout.echoRam[address - 0xE000];
+		if(address < 0x0100 && bootromLoaded)
+			return bootrom[address];
+		else
+			return memoryLayout.memory[address];
+	}
+};
+
+class GameBoy {
+  private:
+	uint32_t cycles = 0;
+	uint32_t lastOpTicks = 0;
+	uint32_t lastRefresh = 0;
+	uint32_t lastScanline = 0;
+	uint32_t cyclesToStayInHblank = -1;
+
+	uint8_t IME = 0; //enables interupts
+
+	//Accumulator and flags
+	RegisterPair AF;
+	//General purpose CPU registers
+	RegisterPair BC;
+	RegisterPair DE;
+	RegisterPair HL;
+
+	Word SP = 0xFFFE; //stack pointer
+	Word PC = 0x0000; //program counter
+
+	AddressSpace addressSpace;
+
+	//General purpose hardware registers
+	Byte* JOYP = &addressSpace[0xFF00];
+	Byte* SB = &addressSpace[0xFF01];
+	Byte* SC = &addressSpace[0xFF02];
+	Byte* DIV = &addressSpace[0xFF04];
+
+	//Timer registers
+	Byte* TIMA = &addressSpace[0xFF05];
+	Byte* TMA = &addressSpace[0xFF15]; //unused
+	Byte* TAC = &addressSpace[0xFF16];
+
+	//interrupt flag and enable
+	Byte* IF = &addressSpace[0xFF0F];
+	Byte* IE = &addressSpace[0xFFFF];
+
+	//Sound registers
+	Byte* NR10 = &addressSpace[0xFF10];
+	Byte* NR11 = &addressSpace[0xFF11];
+	Byte* NR12 = &addressSpace[0xFF12];
+	Byte* NR13 = &addressSpace[0xFF13];
+	Byte* NR14 = &addressSpace[0xFF14];
+	Byte* NR20 = &addressSpace[0xFF15]; //unused
+	Byte* NR21 = &addressSpace[0xFF16];
+	Byte* NR22 = &addressSpace[0xFF17];
+	Byte* NR23 = &addressSpace[0xFF18];
+	Byte* NR24 = &addressSpace[0xFF19];
+	Byte* NR30 = &addressSpace[0xFF1A];
+	Byte* NR31 = &addressSpace[0xFF1B];
+	Byte* NR32 = &addressSpace[0xFF1C];
+	Byte* NR33 = &addressSpace[0xFF1D];
+	Byte* NR34 = &addressSpace[0xFF1E];
+	Byte* NR40 = &addressSpace[0xFF1F]; //unused
+	Byte* NR41 = &addressSpace[0xFF20];
+	Byte* NR42 = &addressSpace[0xFF21];
+	Byte* NR43 = &addressSpace[0xFF22];
+	Byte* NR44 = &addressSpace[0xFF23];
+	Byte* NR50 = &addressSpace[0xFF24];
+	Byte* NR51 = &addressSpace[0xFF25];
+	Byte* NR52 = &addressSpace[0xFF26];
+	Byte* waveRam = &addressSpace[0xFF30]; //WaveRam[0x10]
+
+	//PPU registers
+	Byte* LCDC = &addressSpace[0xFF40];
+	Byte* STAT = &addressSpace[0xFF41];
+	Byte* SCY = &addressSpace[0xFF42];
+	Byte* SCX = &addressSpace[0xF43];
+	Byte* LY = &addressSpace[0xFF44];
+	Byte* LYC = &addressSpace[0xFF45];
+	Byte* DMA = &addressSpace[0xFF46];
+	Byte* BGP = &addressSpace[0xFF47];
+	Byte* OBP0 = &addressSpace[0xFF48];
+	Byte* OBP1 = &addressSpace[0xFF49];
+	Byte* WY = &addressSpace[0xFF4A];
+	Byte* WX = &addressSpace[0xFF4B];
+
+	PPUMode currentMode;
+
+	//3 colour channels
+	uint32_t* framebuffer = new uint32_t[RESOLUTION_X*RESOLUTION_Y*SCREEN_BPP];
+	SDL_Window *screen;
+	SDL_Renderer *renderer;
+	SDL_Texture *texture;
+	SDL_Event event;
+
+	void opcodeHandler();
+	void ppuUpdate();
+	void drawLine();
+	void SDL2present();
+
+	void checkPPUMode();
+	void setPPUMode(PPUMode mode);
+	int cyclesSinceLastScanline();
+	int cyclesSinceLastRefresh();
+
+	void interruptHandler();
+	bool testInterruptEnabled(Byte interrupt);
+	void resetInterrupt(Byte interrupt);
+
+	void VBlankHandle();
+	void LCDStatHandle();
+	void timerHandle();
+	void serialHandle();
+	void joypadHandle();
+
+	void setFlag(Byte bit);
+	void resetFlag(Byte bit);
+	bool getFlag(Byte bit) const;
+
+	Word getWordPC();
+	Byte getBytePC();
+	Word getWordSP();
+	Byte getByteSP();
+
+	void addCycles(Byte ticks);
+
+	//OPCODE FUNCTIONS
+	template<typename T>
+	void ld(T& dest, T src);
+	template<typename T>
+	void orBitwise(T &dest, T src);
+	template<typename T>
+	void andBitwise(T &dest, T src);
+	template<typename T>
+	void xorBitwise(T& dest, T src);
+	template<typename T>
+	void bit(T testBit, T reg);
+	template<typename T>
+	void jp(T address);
+	template<typename T>
+	bool jrNZ(T offset);
+	template<typename T>
+	void inc(T& reg);
+	template<typename T>
+	void call(T address);
+	void halt();
+	void stop();
+	template<typename T>
+	void ldW(T dest, T src);
+	template<typename T>
+	void cp(T value);
+	template<typename T>
+	void dec(T& reg);
+	template<typename T>
+	bool jrZ(T offset);
+	template<typename T>
+	void sub(T value);
+	template<typename T>
+	void jr(T OFFSET);
+	template<typename T>
+	void push(T reg);
+	template<typename T>
+	void rl(T& reg);
+	template<typename T>
+	void pop(T& reg);
+	template<typename T>
+	void rla(T& reg);
+	template<typename T>
+	void rst(T address);
+	void ret();
+	template<typename T>
+	void add(T& reg, T value);
+	void cpl();
+	void ccf();
+	void swap(Byte &value);
+
+  public:
+	void start(std::string bootrom, std::string game);
+	void SDL2setup();
+	void SDL2destroy();
+};
+
+#endif //GBPP_SRC_GAMEBOY_HPP_
diff --git a/src/interupts.cpp b/src/interupts.cpp
new file mode 100644
index 0000000..6696afc
--- /dev/null
+++ b/src/interupts.cpp
@@ -0,0 +1,78 @@
+#include "defines.hpp"
+#include "gameboy.hpp"
+
+bool GameBoy::testInterruptEnabled(Byte interrupt)
+{
+	return (*IE) & (Byte) (1 << interrupt);
+}
+
+void GameBoy::resetInterrupt(Byte interrupt)
+{
+	*IF &= ~(1 << interrupt);
+}
+
+void GameBoy::interruptHandler()
+{
+	if(!IME)
+		return;
+
+	if(*IF & (Byte) (1 << VBLANK_INTERRUPT) && testInterruptEnabled(VBLANK_INTERRUPT))
+		VBlankHandle();
+	if(*IF & (Byte) (1 << LCD_STAT_INTERRUPT) && testInterruptEnabled(LCD_STAT_INTERRUPT))
+		LCDStatHandle();
+	if(*IF & (Byte) (1 << TIMER_INTERRUPT) && testInterruptEnabled(TIMER_INTERRUPT))
+		timerHandle();
+	if(*IF & (Byte) (1 << SERIAL_INTERRUPT)	&& testInterruptEnabled(SERIAL_INTERRUPT))
+		serialHandle();
+	if(*IF & (Byte) (1 << JOYPAD_INTERRUPT)	&& testInterruptEnabled(JOYPAD_INTERRUPT))
+		joypadHandle();
+}
+
+void GameBoy::VBlankHandle()
+{
+	printf("VBlank interrupt");
+	IME = 0;
+	push(PC);
+	PC = 0x40;
+	resetInterrupt(VBLANK_INTERRUPT);
+}
+
+void GameBoy::LCDStatHandle()
+{
+	printf("LCD stat interrupt");
+	IME = 0;
+	push(PC);
+	addCycles(16);
+	PC = 0x48;
+	resetInterrupt(LCD_STAT_INTERRUPT);
+}
+
+void GameBoy::timerHandle()
+{
+	printf("timer interrupt");
+	IME = 0;
+	push(PC);
+	addCycles(16);
+	PC = 0x50;
+	resetInterrupt(TIMER_INTERRUPT);
+}
+
+void GameBoy::serialHandle()
+{
+	printf("serial interrupt");
+	IME = 0;
+	push(PC);
+	addCycles(16);
+	PC = 0x58;
+	resetInterrupt(SERIAL_INTERRUPT);
+}
+
+void GameBoy::joypadHandle()
+{
+	printf("joypad interrupt");
+	IME = 0;
+	push(PC);
+	addCycles(16);
+	PC = 0x60;
+	resetInterrupt(JOYPAD_INTERRUPT);
+}
\ No newline at end of file
diff --git a/src/main.cpp b/src/main.cpp
new file mode 100644
index 0000000..da4648c
--- /dev/null
+++ b/src/main.cpp
@@ -0,0 +1,18 @@
+#include <iostream>
+#include <filesystem>
+#include <string>
+#include <optional>
+#include "gameboy.hpp"
+#include "defines.hpp"
+
+namespace fs = std::filesystem;
+
+int main(int argc, char** argv)
+{
+	auto* gb = new GameBoy();
+	gb->SDL2setup();
+	gb->start("/home/braiden/Code/GBpp/bootrom.bin", "/home/braiden/Code/GBpp/roms/DrMario.gb");
+	gb->SDL2destroy();
+	delete gb;
+	return 0;
+}
diff --git a/src/ppu.cpp b/src/ppu.cpp
new file mode 100644
index 0000000..d154dd6
--- /dev/null
+++ b/src/ppu.cpp
@@ -0,0 +1,212 @@
+#include "gameboy.hpp"
+#include "defines.hpp"
+
+
+
+void GameBoy::ppuUpdate()
+{
+	//test HBlank
+	checkPPUMode();
+
+	if(cyclesToStayInHblank != -1)
+	{
+		if (cyclesToStayInHblank < cyclesSinceLastScanline())
+		{
+			return;
+		}
+		if(cyclesToStayInHblank >= cyclesSinceLastScanline())
+		{
+			lastScanline = cycles;
+			cyclesToStayInHblank = -1;
+		}
+	}
+
+	// Check the PPU mode (HBlank, VBlank, OAM Search, or Pixel Transfer)
+	Byte mode = (*STAT)&0x03;
+	switch(mode)
+	{
+	case 0:
+		if(cyclesSinceLastScanline() > MODE2_DURATION + MODE3_BASE_DURATION)
+		{
+			drawLine();
+			cyclesToStayInHblank = SCANLINE_DURATION - cyclesSinceLastScanline();
+			lastScanline = cycles;
+			(*LY)++;
+			if((*LY) > 153)
+				(*LY) = 0;
+		}
+		currentMode = PPUMode::mode0;
+		break;
+
+	//vblank
+	case 1:
+		if(currentMode != PPUMode::mode1)
+		{
+			drawLine();
+		}
+		if(cyclesSinceLastScanline() > SCANLINE_DURATION)
+		{
+			lastScanline = cycles;
+			(*LY)++;
+			if((*LY) > 153)
+				(*LY) = 0;
+		}
+		currentMode = PPUMode::mode1;
+		break;
+	case 2:
+		currentMode = PPUMode::mode2;
+		break;
+	case 3:
+		currentMode = PPUMode::mode3;
+		break;
+	}
+
+	if ((*LY) == (*LYC) || (*STAT)&(1 << 6))
+	{
+		// Request STAT interrupt if LY matches LYC
+		//bug on DMG models triggers a STAT interrupt anytime the STAT register is written
+		//Road Rage and Zerd no Denetsu rely on this
+		(*STAT) |= (1 << 2);
+	}
+
+	// Check for STAT interrupts and request if needed (e.g., when entering specific modes)
+	bool hBlankInterruptEnabled = (*STAT)&(1 << 3);
+	bool vBlankInterruptEnabled = (*STAT)&(1 << 4);/* Determine if VBlank interrupt is enabled */
+	bool oamInterruptEnabled = (*STAT)&(1 << 5);/* Determine if OAM Search interrupt is enabled */
+
+	if (currentMode == PPUMode::mode0 && hBlankInterruptEnabled)
+	{
+		// Request HBlank interrupt
+	}
+	else if (currentMode == PPUMode::mode1 && vBlankInterruptEnabled)
+	{
+		// Request VBlank interrupt
+	}
+	else if (currentMode == PPUMode::mode2 && oamInterruptEnabled)
+	{
+		// Request OAM Search interrupt
+	}
+}
+
+int GameBoy::cyclesSinceLastScanline()
+{
+	int difference = cycles - lastScanline;
+	if (difference < 0)
+	{
+		// Handle the case when cycles has wrapped around (overflowed)
+		difference += T_CLOCK_FREQ;
+	}
+	return difference;
+}
+
+int GameBoy::cyclesSinceLastRefresh()
+{
+	int difference = cycles - lastRefresh;
+	if (difference < 0)
+	{
+		// Handle the case when cycles has wrapped around (overflowed)
+		difference += T_CLOCK_FREQ;
+	}
+	return difference;
+}
+
+void GameBoy::checkPPUMode()
+{
+	int oamFetchTime = 0;
+	if ((*LY) < 144)
+	{
+		int currentDuration = cyclesSinceLastScanline();
+		// Active Display Period (HBlank, OAM Search, and Pixel Transfer)
+		if(currentDuration < MODE2_DURATION)
+			setPPUMode(PPUMode::mode2);
+		else if(currentDuration < MODE2_DURATION + MODE3_BASE_DURATION + oamFetchTime)
+			setPPUMode(PPUMode::mode3);
+		else
+			setPPUMode(PPUMode::mode0);
+	}
+	// VBlank Period
+	else
+		setPPUMode(PPUMode::mode1);
+}
+
+void GameBoy::setPPUMode(PPUMode mode)
+{
+	switch(mode)
+	{
+	case PPUMode::mode0:
+		(*STAT) &= ~0x03;
+		break;
+	case PPUMode::mode1:
+		(*STAT) &= ~0x03;
+		(*STAT) |= 0x01;
+		//set vblank interrupt flag
+		(*IF) |= 0x01;
+		break;
+	case PPUMode::mode2:
+		(*STAT) &= ~0x03;
+		(*STAT) |= 0x02;
+		break;
+	case PPUMode::mode3:
+		(*STAT) &= ~0x03;
+		(*STAT) |= 0x03;
+		break;
+	}
+}
+
+void GameBoy::drawLine()
+{
+	uint8_t line = (*LY);
+
+	// Calculate the starting index of the current scanline in the framebuffer
+	uint32_t lineStartIndex = line * RESOLUTION_X;
+
+	// Pointer to the current line's pixel data in the framebuffer
+	uint32_t* currentLinePixels = framebuffer + lineStartIndex;
+
+	// For example, if you are setting the entire scanline to a color (e.g., white):
+	for (int i = 0; i < RESOLUTION_X; i++)
+	{
+		// Assuming white color is represented as 0xFFFFFFFF (ARGB format)
+//		if(currentLinePixels[i] == 0xFFFFFFFF)
+//			currentLinePixels[i] = 0xFF000000;
+//		else
+			currentLinePixels[i] = 0xFFFFFFFF;
+	}
+}
+
+void GameBoy::SDL2setup()
+{
+	SDL_Init(SDL_INIT_EVERYTHING);
+	screen = SDL_CreateWindow("GBpp",
+							SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
+							RESOLUTION_X, RESOLUTION_Y,
+							SDL_WINDOW_OPENGL);
+
+	// Create an SDL renderer to draw on the window
+	renderer = SDL_CreateRenderer(screen, -1, SDL_RENDERER_ACCELERATED);
+
+	// Create an SDL texture to hold the framebuffer data
+	texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_ARGB8888,
+		SDL_TEXTUREACCESS_STREAMING, RESOLUTION_X, RESOLUTION_Y);
+}
+
+void GameBoy::SDL2destroy()
+{
+	SDL_DestroyTexture(texture);
+	SDL_DestroyRenderer(renderer);
+	SDL_DestroyWindow(screen);
+	SDL_Quit();
+}
+
+void GameBoy::SDL2present()
+{
+	// Update the SDL texture with the framebuffer data
+	SDL_UpdateTexture(texture, NULL, framebuffer, RESOLUTION_X * sizeof(uint32_t));
+
+	// Clear the renderer and render the texture
+	SDL_RenderClear(renderer);
+	SDL_RenderCopy(renderer, texture, NULL, NULL);
+
+	// Present the renderer on the screen
+	SDL_RenderPresent(renderer);
+}
\ No newline at end of file