diff --git a/sources/PPU/PPU.cpp b/sources/PPU/PPU.cpp
index 9e2b4ad..cb9067e 100644
--- a/sources/PPU/PPU.cpp
+++ b/sources/PPU/PPU.cpp
@@ -203,7 +203,7 @@ namespace ComSquare::PPU
 
 	uint8_t PPU::read(uint24_t addr)
 	{
-		return 0;
+		//return 0;
 		switch (addr) {
 		case PpuRegisters::mpyl:
 			return  this->_registers._mpy.mpyl;
@@ -248,7 +248,7 @@ namespace ComSquare::PPU
 
 	void PPU::write(uint24_t addr, uint8_t data)
 	{
-		return;
+		//return;
 		switch (addr) {
 		case PpuRegisters::inidisp:
 			this->_registers._inidisp.raw = data;
@@ -294,20 +294,28 @@ namespace ComSquare::PPU
 			break;
 		case PpuRegisters::bg12nba:
 		case PpuRegisters::bg34nba:
-			this->_registers._bgnba[addr - 0x0B].raw = data;
+			this->_registers._bgnba[addr - PpuRegisters::bg12nba].raw = data;
 			break;
 		case PpuRegisters::bg1hofs:
-		case PpuRegisters::bg1vofs:
+			// TODO need of special var for prev value for Mode 7
+			this->_registers._m7ofs[addr - PpuRegisters::bg1hofs].raw = data;
+			__attribute__((fallthrough));
 		case PpuRegisters::bg2hofs:
-		case PpuRegisters::bg2vofs:
 		case PpuRegisters::bg3hofs:
-		case PpuRegisters::bg3vofs:
 		case PpuRegisters::bg4hofs:
+			this->_registers._bgofs[addr - PpuRegisters::bg1hofs].raw = ((data << 8) | (this->_ppuState.hvSharedScrollPrevValue & ~7) | (this->_ppuState.hScrollPrevValue & 7)) & 0x3FF;
+			this->_ppuState.hScrollPrevValue = data;
+			this->_ppuState.hvSharedScrollPrevValue = data;
+			break;
+		case PpuRegisters::bg1vofs:
+			// TODO need of special var for prev value for Mode 7
+			this->_registers._bgnba[addr - PpuRegisters::bg12nba].raw = data;
+			__attribute__((fallthrough));
+		case PpuRegisters::bg2vofs:
+		case PpuRegisters::bg3vofs:
 		case PpuRegisters::bg4vofs:
-			// Work in progress !
-			if (addr == PpuRegisters::bg1hofs || addr == PpuRegisters::bg1vofs)
-				this->_registers._m7ofs[addr - PpuRegisters::bg1hofs].raw = data;
-			this->_registers._bgofs[addr - PpuRegisters::bg1hofs].raw = data;
+			this->_registers._bgofs[addr - PpuRegisters::bg1hofs].raw = ((data << 8) | this->_ppuState.hvSharedScrollPrevValue) & 0x3FF;
+			this->_ppuState.hvSharedScrollPrevValue = data;
 			break;
 		case PpuRegisters::vmain:
 			this->_registers._vmain.raw = data;
diff --git a/sources/PPU/PPU.hpp b/sources/PPU/PPU.hpp
index a155804..c3b0adb 100644
--- a/sources/PPU/PPU.hpp
+++ b/sources/PPU/PPU.hpp
@@ -13,6 +13,7 @@
 #include "../Ram/Ram.hpp"
 #include "../Models/Vector2.hpp"
 #include "Background.hpp"
+#include "PPUUtils.hpp"
 
 //#define max2BitTiles		4096
 //#define max4BitTiles		2048
@@ -570,6 +571,8 @@ namespace ComSquare::PPU
 		std::array<std::array<uint32_t, 1024>, 1024> _screen;
 		//! @brief Used for vram read registers (0x2139 - 0x213A)
 		uint16_t _vramReadBuffer = 0;
+		//! @brief Struct that contain all necessary vars for the use of the registers
+		struct PpuState _ppuState;
 	public:
 
 		explicit PPU(Renderer::IRenderer &renderer);
diff --git a/sources/PPU/PPUUtils.hpp b/sources/PPU/PPUUtils.hpp
index 1453641..06de286 100644
--- a/sources/PPU/PPUUtils.hpp
+++ b/sources/PPU/PPUUtils.hpp
@@ -28,5 +28,13 @@ namespace ComSquare::PPU
 		uint16_t raw = 0;
 	};
 
+	//! @brief Struct to save all specific variables needed for the registers (prev values for example)
+	struct PpuState {
+		//! @brief Used by by all eight BGnxOFS registers (0x210D - 0x2114)
+		uint8_t hvSharedScrollPrevValue;
+		//! @brief Shared by the four BGnHOFS registers
+		uint8_t hScrollPrevValue;
+	};
+
 }
 #endif //COMSQUARE_PPU_UTILS_HPP
\ No newline at end of file