EightBit/inc/Bus.h
Adrian Conlon 03b536838b Some constexpr improvements in low level classes.
Signed-off-by: Adrian Conlon <adrian.conlon@gmail.com>
2021-10-24 11:12:23 +01:00

66 lines
1.9 KiB
C++

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