Modified APU Registers

Adding Internal APU Registers
Adding write & read functions

sources/APU/APU.hpp

@@ -5,30 +5,37 @@
 #ifndef COMSQUARE_APU_HPP
 #define COMSQUARE_APU_HPP
 
+#include <memory>
 #include "../Memory/IMemory.hpp"
 
 namespace ComSquare::APU
 {
 	struct Registers {
-		//! @brief The Accumulator register
-		unsigned char a;
 
 		//! @brief The X index register
-		unsigned char x;
+		uint8_t x;
 
-		//! @brief The Y index register
-		unsigned char y;
+		//! @brief The YA register
+		union {
+			struct {
+				//! @brief The Accumulator register
+				uint8_t a;
+				//! @brief The Y Index register
+				uint8_t y;
+			};
+			uint16_t ya;
+		};
 
 		//! @brief The Stack pointer register
-		unsigned char sp;
+		uint8_t sp;
 
 		//! @brief The Program counter register
 		union {
 			struct {
-				unsigned char pch;
-				unsigned char pcl;
+				uint8_t pcl;
+				uint8_t pch;
 			};
-			unsigned short pc;
+			uint16_t pc;
 		};
 
 		//! @brief Program Status Word register
@@ -52,9 +59,66 @@ namespace ComSquare::APU
 		};
 	};
 
+	struct InternalRegisters
+	{
+		//! @brief An undocumented register
+		uint8_t unknown;
+
+		//! @brief Control Register register
+		uint8_t ctrlreg;
+
+		//! @brief DSP Register Address register
+		uint8_t dspregAddr;
+		//! @brief DSP Register data register
+		uint8_t dspregData;
+
+		//! @brief Port 0 register
+		uint8_t port0;
+		//! @brief Port 1 register
+		uint8_t port1;
+		//! @brief Port 2 register
+		uint8_t port2;
+		//! @brief Port 3 register
+		uint8_t port3;
+
+		//! @brief Regular Memory register
+		uint8_t regmem1;
+		//! @brief Another Regular Memory register
+		uint8_t regmem2;
+
+		//! @brief Timer-0 register
+		uint8_t timer0;
+		//! @brief Timer-1 register
+		uint8_t timer1;
+		//! @brief Timer-2 register
+		uint8_t timer2;
+
+		//! @brief Counter-0 register
+		uint8_t counter0;
+		//! @brief Counter-1 register
+		uint8_t counter1;
+		//! @brief Counter-2 register
+		uint8_t counter2;
+
+	};
+
+
 	class APU : IMemory {
 	private:
 		Registers _registers;
+		InternalRegisters _internalRegisters{};
+	public:
+		//! @brief Read from the internal APU register.
+		//! @param addr The address to read from. The address 0xF0 should refer to the first byte of the register.
+		//! @throw InvalidAddress will be thrown if the address is more than $FF (the number of register).
+		//! @return Return the value of the register.
+		uint8_t read(uint24_t addr) override;
+		//! @brief Write data to the internal APY register.
+		//! @param addr The address to write to. The address 0xF0 should refer to the first byte of register.
+		//! @param data The new value of the register.
+		//! @throw InvalidAddress will be thrown if the address is more than $FF (the number of register).
+		void write(uint24_t addr, uint8_t data) override;
+		bool update();
 	};
 }