diff --git a/sources/CPU/CPU.cpp b/sources/CPU/CPU.cpp
index b84cbc5..6bcb7ca 100644
--- a/sources/CPU/CPU.cpp
+++ b/sources/CPU/CPU.cpp
@@ -294,4 +294,28 @@ namespace ComSquare::CPU
 		dp += this->_registers.y;
 		return dp;
 	}
+
+	uint24_t CPU::_getAbsoluteIndexedByXAddr()
+	{
+		uint16_t abs = this->_bus->read(this->_registers.pac++);
+		abs += this->_bus->read(this->_registers.pac++) << 8u;
+		uint24_t effective = abs + (this->_registers.dbr << 16u);
+		return effective + this->_registers.x;
+	}
+
+	uint24_t CPU::_getAbsoluteIndexedByYAddr()
+	{
+		uint16_t abs = this->_bus->read(this->_registers.pac++);
+		abs += this->_bus->read(this->_registers.pac++) << 8u;
+		uint24_t effective = abs + (this->_registers.dbr << 16u);
+		return effective + this->_registers.y;
+	}
+
+	uint24_t CPU::_getAbsoluteLongIndexedByXAddr()
+	{
+		uint24_t lng = this->_bus->read(this->_registers.pac++);
+		lng += this->_bus->read(this->_registers.pac++) << 8u;
+		lng += this->_bus->read(this->_registers.pac++) << 16u;
+		return lng + this->_registers.x;
+	}
 }
\ No newline at end of file
diff --git a/sources/CPU/CPU.hpp b/sources/CPU/CPU.hpp
index 9a06474..cb520c3 100644
--- a/sources/CPU/CPU.hpp
+++ b/sources/CPU/CPU.hpp
@@ -212,6 +212,12 @@ namespace ComSquare::CPU
 		uint24_t _getDirectIndexedByXAddr();
 		//! @brief The DP address is added to Y to form the effective address. The effective address is always in bank 0.
 		uint24_t _getDirectIndexedByYAddr();
+		//! @brief The absolute expression is added with X and combined with DBR to form the effective address.
+		uint24_t _getAbsoluteIndexedByXAddr();
+		//! @brief The absolute expression is added with Y and combined with DBR to form the effective address.
+		uint24_t _getAbsoluteIndexedByYAddr();
+		//! @brief The effective address is formed by adding the <long exp> with X.
+		uint24_t _getAbsoluteLongIndexedByXAddr();
 
 
 		//! @brief Execute a single instruction.
diff --git a/tests/CPU/testAddressingMode.cpp b/tests/CPU/testAddressingMode.cpp
index 5d668f8..ba97e75 100644
--- a/tests/CPU/testAddressingMode.cpp
+++ b/tests/CPU/testAddressingMode.cpp
@@ -126,4 +126,40 @@ Test(AddrMode, DirectIndexedByY)
 	pair.second.cpu->_registers.pac = 0x808000;
 	cr_assert_eq(pair.second.cpu->_getDirectIndexedByYAddr(), 0x1012, "Returned address was %x but was expecting 0x1012.", pair.second.cpu->_getDirectIndexedByYAddr());
 	cr_assert_eq(pair.second.cpu->_registers.pac, 0x808001);
+}
+
+Test(AddrMode, AbsoluteIndexByX)
+{
+	auto pair = Init();
+	pair.second.cpu->_registers.pac = 0x808000;
+	pair.second.cartridge->_data[0] = 0x10;
+	pair.second.cartridge->_data[1] = 0xAC;
+	pair.second.cpu->_registers.dbr = 0xEF;
+	pair.second.cpu->_registers.x = 0x0005;
+	cr_assert_eq(pair.second.cpu->_getAbsoluteIndexedByXAddr(), 0xEFAC15, "Returned address was %x but was expecting 0xEFAC15.", pair.second.cpu->_getAbsoluteIndexedByXAddr());
+	cr_assert_eq(pair.second.cpu->_registers.pac, 0x808002);
+}
+
+Test(AddrMode, AbsoluteIndexByY)
+{
+	auto pair = Init();
+	pair.second.cpu->_registers.pac = 0x808000;
+	pair.second.cartridge->_data[0] = 0x10;
+	pair.second.cartridge->_data[1] = 0xAC;
+	pair.second.cpu->_registers.dbr = 0xEF;
+	pair.second.cpu->_registers.y = 0x0005;
+	cr_assert_eq(pair.second.cpu->_getAbsoluteIndexedByYAddr(), 0xEFAC15, "Returned address was %x but was expecting 0xEFAC15.", pair.second.cpu->_getAbsoluteIndexedByYAddr());
+	cr_assert_eq(pair.second.cpu->_registers.pac, 0x808002);
+}
+
+Test(AddrMode, AbsoluteLongIndexByX)
+{
+	auto pair = Init();
+	pair.second.cpu->_registers.pac = 0x808000;
+	pair.second.cartridge->_data[0] = 0x10;
+	pair.second.cartridge->_data[1] = 0xAC;
+	pair.second.cartridge->_data[2] = 0xEF;
+	pair.second.cpu->_registers.x = 0x0005;
+	cr_assert_eq(pair.second.cpu->_getAbsoluteLongIndexedByXAddr(), 0xEFAC15, "Returned address was %x but was expecting 0xEFAC15.", pair.second.cpu->_getAbsoluteLongIndexedByXAddr());
+	cr_assert_eq(pair.second.cpu->_registers.pac, 0x808003);
 }
\ No newline at end of file