APU.hpp

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//
// Created by Melefo on 24/01/2020.
//
 
#ifndef COMSQUARE_APU_HPP
#define COMSQUARE_APU_HPP
 
#include <memory>
#include "../DSP/DSP.hpp"
#include "../Memory/IMemory.hpp"
 
namespace ComSquare::APU
{
    struct InternalRegisters {
 
        uint8_t x;
 
        union {
            struct {
                uint8_t a;
                uint8_t y;
            };
            uint16_t ya;
        };
 
        uint8_t sp;
 
        union {
            struct {
                uint8_t pcl;
                uint8_t pch;
            };
            uint16_t pc;
        };
 
        union psw {
            bool n : 1;
            bool v : 1;
            bool p : 1;
            bool b : 1;
            bool h : 1;
            bool i : 1;
            bool z : 1;
            bool c : 1;
        };
    };
 
    struct Registers
    {
        uint8_t unknown;
 
        uint8_t ctrlreg;
 
        uint8_t dspregAddr;
        uint8_t dspregData;
 
        uint8_t port0;
        uint8_t port1;
        uint8_t port2;
        uint8_t port3;
 
        uint8_t regmem1;
        uint8_t regmem2;
 
        uint8_t timer0;
        uint8_t timer1;
        uint8_t timer2;
 
        uint8_t counter0;
        uint8_t counter1;
        uint8_t counter2;
 
    };
 
    class APU : public Memory::IMemory {
    private:
        Registers _registers{};
        InternalRegisters _internalRegisters{};
 
        std::shared_ptr<DSP::DSP> _dsp;
    public:
        explicit APU();
 
        uint8_t read(uint24_t addr) override;
        void write(uint24_t addr, uint8_t data) override;
        bool update();
    };
}
 
#endif //COMSQUARE_APU_HPP