Starting to test addressings modes

sources/CPU/CPU.cpp

@@ -227,20 +227,20 @@ namespace ComSquare::CPU
 
 	uint24_t CPU::_GetImmediateAddr()
 	{
-		return this->_registers.pc++;
+		return this->_registers.pac++;
 	}
 
 	uint24_t CPU::_GetDirectAddr()
 	{
-		uint8_t addr = this->_bus->read(this->_registers.pc++);
+		uint8_t addr = this->_bus->read(this->_registers.pac++);
 		return this->_registers.d + addr;
 	}
 
 	uint24_t CPU::_GetAbsoluteAddr()
 	{
 		uint24_t addr = this->_registers.dbr << 16u;
-		addr += this->_bus->read(this->_registers.pc++) << 8u;
-		addr += this->_bus->read(this->_registers.pc++);
+		addr += this->_bus->read(this->_registers.pac++) << 8u;
+		addr += this->_bus->read(this->_registers.pac++);
 		return addr;
 	}
 

sources/CPU/CPU.hpp

@@ -33,8 +33,10 @@ namespace ComSquare::CPU
 			};
 			uint16_t d;
 		};
-		//! @brief The program banK register;
-		uint8_t k;
+		union {
+			struct {
+				//! @brief The Program Bank Register;
+				uint8_t pbr;
 				//! @brief The Program Counter;
 				union {
 					struct {
@@ -43,6 +45,10 @@ namespace ComSquare::CPU
 					};
 					uint16_t pc;
 				};
+			};
+			//! @brief The current Program Address Counter (does not exist in a snes but is useful here).
+			uint24_t pac;
+		};
 		//! @brief The Stack pointer
 		union {
 			struct {

sources/Cartridge/Cartridge.cpp

@@ -49,6 +49,7 @@ namespace ComSquare::Cartridge
 
 	uint8_t Cartridge::read_internal(uint24_t addr)
 	{
+		std::cout << "Reading a addr: " << std::hex << addr << " romStart: " << std::hex << _romStart << std::endl;
 		if (addr >= this->_size)
 			throw InvalidAddress("Cartridge read", addr);
 		return this->_data[addr + this->_romStart];

sources/Memory/IRectangleMemory.cpp

@@ -2,7 +2,6 @@
 // Created by anonymus-raccoon on 1/29/20.
 //
 
-#include <iostream>
 #include "IRectangleMemory.hpp"
 #include "../Exceptions/InvalidAddress.hpp"
 

sources/Memory/MemoryBus.cpp

@@ -15,7 +15,6 @@ namespace ComSquare::Memory
 	{
 		auto it = std::find_if(this->_memoryAccessors.begin(), this->_memoryAccessors.end(), [addr](std::shared_ptr<IMemory> &accessor)
 		{
-//			std::cout << "Accessor: " << std::hex << accessor->getStart() << " Has access:: " << accessor->hasMemoryAt(addr) << std::endl;
 			return accessor->hasMemoryAt(addr);
 		});
 		if (it == this->_memoryAccessors.end())

tests/CPU/testAddressingMode.cpp

@@ -12,7 +12,25 @@ using namespace ComSquare;
 Test(AddrMode, Immediate)
 {
 	auto pair = Init();
-	pair.second.cpu->_registers.pc = 0x15;
-	cr_assert_eq(pair.second.cpu->_GetImmediateAddr(), 0x15);
-	cr_assert_eq(pair.second.cpu->_registers.pc, 0x16);
+	pair.second.cpu->_registers.pac = 0x000015;
+	cr_assert_eq(pair.second.cpu->_GetImmediateAddr(), 0x000015, "Got %i, Expected 0x000015");
+	cr_assert_eq(pair.second.cpu->_registers.pac, 0x000016);
+}
+
+Test(AddrMode, ImmediateBankChange)
+{
+	auto pair = Init();
+	pair.second.cpu->_registers.pac = 0x00FFFF;
+	cr_assert_eq(pair.second.cpu->_GetImmediateAddr(), 0x00FFFF);
+	cr_assert_eq(pair.second.cpu->_registers.pac, 0x010000);
+}
+
+Test(AddrMode, Direct)
+{
+	auto pair = Init();
+	pair.second.cartridge->_data[0] = 0x15;
+	pair.second.cpu->_registers.pac = 0x808000;
+	pair.second.cpu->_registers.d = 0x1000;
+	cr_assert_eq(pair.second.cpu->_GetDirectAddr(), 0x1015, "Returned address was %i but was expecting 0x1015.");
+	cr_assert_eq(pair.second.cpu->_registers.pac, 0x808001);
 }

tests/testMemoryBus.cpp

@@ -287,6 +287,16 @@ Test(BusRead, ReadROM)
 	cr_assert_eq(data, 123);
 }
 
+Test(BusRead, ReadROMStart)
+{
+	auto pair = Init();
+	uint8_t data;
+
+	pair.second.cartridge->_data[0] = 123;
+	data = pair.first.read(0x808000);
+	cr_assert_eq(data, 123);
+}
+
 Test(BusRead, ReadCPU)
 {
 	auto pair = Init();

tests/tests.cpp

@@ -14,7 +14,7 @@ std::pair<Memory::MemoryBus, SNES> Init()
 	Memory::MemoryBus bus;
 	Renderer::NoRenderer norenderer(0, 0, 0);
 	SNES snes(std::make_shared<Memory::MemoryBus>(bus), "", norenderer);
-	snes.cartridge->_size = 10;
+	snes.cartridge->_size = 100;
 	snes.cartridge->_data = new uint8_t[snes.cartridge->_size];
 	snes.cartridge->header.mappingMode = Cartridge::LoRom;
 	snes.sram->_size = 10;