66 lines
2.0 KiB
C++
66 lines
2.0 KiB
C++
#pragma once
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#include <cstdint>
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#include <string>
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#include "Chip.h"
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#include "Signal.h"
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#include "Register.h"
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#include "EventArgs.h"
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#include "Mapper.h"
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namespace EightBit {
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class Bus : public Mapper {
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public:
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virtual ~Bus() noexcept = default;
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Signal<EventArgs> WritingByte;
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Signal<EventArgs> WrittenByte;
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Signal<EventArgs> ReadingByte;
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Signal<EventArgs> ReadByte;
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[[nodiscard]] constexpr auto ADDRESS() const noexcept { return m_address; }
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[[nodiscard]] constexpr auto& ADDRESS() noexcept { return m_address; }
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[[nodiscard]] constexpr auto DATA() const noexcept { return m_data; }
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[[nodiscard]] constexpr auto& DATA() noexcept { return m_data; }
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[[nodiscard]] auto peek() noexcept { return reference(); }
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[[nodiscard]] virtual uint8_t peek(const uint16_t address) noexcept { return reference(address); }
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[[nodiscard]] auto peek(const register16_t address) noexcept { return peek(address.word); }
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void poke(const uint8_t value) noexcept { reference() = value; }
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virtual void poke(const uint16_t address, const uint8_t value) noexcept { reference(address) = value; }
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void poke(const register16_t address, const uint8_t value) noexcept { poke(address.word, value); }
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[[nodiscard]] uint8_t read();
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template<class T> [[nodiscard]] auto read(const T address) {
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ADDRESS() = address;
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return read();
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}
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void write();
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void write(uint8_t value);
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template<class T> void write(const T offset, const uint8_t value) {
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ADDRESS() = offset;
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write(value);
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}
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virtual void raisePOWER() noexcept;
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virtual void lowerPOWER() noexcept;
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virtual void initialise() = 0;
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protected:
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[[nodiscard]] uint8_t& reference(uint16_t address) noexcept;
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[[nodiscard]] auto& reference(const register16_t address) noexcept { return reference(address.word); }
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[[nodiscard]] uint8_t& reference() noexcept { return reference(ADDRESS()); }
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void loadHexFile(const std::string& path);
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private:
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uint8_t m_data = Chip::Mask8;
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register16_t m_address = Chip::Mask16;
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};
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}
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