mirror of
https://github.com/zoriya/ComSquare.git
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133 lines
2.9 KiB
C++
133 lines
2.9 KiB
C++
//
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// Created by Melefo on 24/01/2020.
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//
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#ifndef COMSQUARE_APU_HPP
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#define COMSQUARE_APU_HPP
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#include <memory>
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#include "../Memory/IMemory.hpp"
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namespace ComSquare::APU
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{
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struct Registers {
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//! @brief The X index register
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uint8_t x;
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//! @brief The YA register
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union {
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struct {
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//! @brief The Accumulator register
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uint8_t a;
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//! @brief The Y Index register
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uint8_t y;
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};
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uint16_t ya;
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};
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//! @brief The Stack pointer register
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uint8_t sp;
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//! @brief The Program counter register
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union {
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struct {
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uint8_t pcl;
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uint8_t pch;
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};
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uint16_t pc;
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};
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//! @brief Program Status Word register
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union psw {
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//! @brief Negative flag
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bool n : 1;
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//! @brief Overflow flag
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bool v : 1;
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//! @brief Direct page flag
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bool p : 1;
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//! @brief Break flag
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bool b : 1;
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//! @brief Half carry flag
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bool h : 1;
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//! @brief Interrupt enabled flag
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bool i : 1;
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//! @brief Zero flag
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bool z : 1;
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//! @brief Carry flag
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bool c : 1;
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};
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};
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struct InternalRegisters
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{
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//! @brief An undocumented register
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uint8_t unknown;
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//! @brief Control Register register
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uint8_t ctrlreg;
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//! @brief DSP Register Address register
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uint8_t dspregAddr;
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//! @brief DSP Register data register
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uint8_t dspregData;
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//! @brief Port 0 register
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uint8_t port0;
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//! @brief Port 1 register
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uint8_t port1;
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//! @brief Port 2 register
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uint8_t port2;
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//! @brief Port 3 register
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uint8_t port3;
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//! @brief Regular Memory register
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uint8_t regmem1;
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//! @brief Another Regular Memory register
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uint8_t regmem2;
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//! @brief Timer-0 register
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uint8_t timer0;
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//! @brief Timer-1 register
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uint8_t timer1;
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//! @brief Timer-2 register
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uint8_t timer2;
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//! @brief Counter-0 register
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uint8_t counter0;
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//! @brief Counter-1 register
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uint8_t counter1;
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//! @brief Counter-2 register
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uint8_t counter2;
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};
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class DSP {
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};
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class APU : IMemory {
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private:
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Registers _registers;
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InternalRegisters _internalRegisters{};
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public:
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explicit APU(std::shared_ptr<DSP> dsp);
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//! @brief The DSP component used to produce sound
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std::shared_ptr<DSP> _dsp;
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//! @brief Read from the internal APU register.
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//! @param addr The address to read from. The address 0xF0 should refer to the first byte of the register.
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//! @throw InvalidAddress will be thrown if the address is more than $FF (the number of register).
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//! @return Return the value of the register.
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uint8_t read(uint24_t addr) override;
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//! @brief Write data to the internal APY register.
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//! @param addr The address to write to. The address 0xF0 should refer to the first byte of register.
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//! @param data The new value of the register.
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//! @throw InvalidAddress will be thrown if the address is more than $FF (the number of register).
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void write(uint24_t addr, uint8_t data) override;
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bool update();
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};
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}
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#endif //COMSQUARE_APU_HPP
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